Changes in tree, liana, and understory plant diversity and community composition in five tropical rain forest fragments varying in area (18-2600 ha) and disturbance levels were studied on the Valparai plateau, Western Ghats. Systematic sampling using small quadrats (totaling 4 ha for trees and lianas, 0.16 ha for understory plants) enumerated 312 species in 103 families: 1968 trees (144 species), 2250 lianas (60 species), and 6123 understory plants (108 species). Tree species density, stem density, and basal area were higher in the three larger (, 100 ha) rain forest fragments but were negatively correlated with disturbance scores rather than area per se. Liana species density, stem density, and basal area were higher in moderately disturbed and lower in heavily disturbed fragments than in the three larger fragments. Understory species density was highest in the highly disturbed 18-ha fragment, due to weedy invasive species occurring with rain forest plants. Nonmetric multidimensional scaling ...
Injectable ergometrine is very unstable under tropical conditions and particularly if stored unrefrigerated and exposed to light, when it may loose up to 20% of its potency per month. However, there are differences between brands. Practical measures to assure the quality of injectable ergometrine therefore include a careful supplier selection and refrigerated storage. Ergometrine injection should always be protected from light until given to the patient. Loss of active ingredient can easily be detected by regular visual checks of the colour of the solution. Any discoloration implies that the solution contains less than 90% of the stated amount of active ingredient, and should not be used. Methylergometrine is no more stable than ergometrine. Parenteral oxytocin is more stable than both ergometrine and methylergometrine injection. Oral and buccal dosage forms are less stable than injections. In view of the better stability in tropical climates, similar cost, fewer side effects and comparative ...
51] In view of the rather conservative approach of boundary conditions we are convinced that the global source strength of tropical rainforest is indeed in the range of 0.88-2.37 TG N yr−1. Our global source strength of 1.34 Tg N yr−1, as well as the data induced uncertainty range, are in agreement with previous approaches applied for estimating the global N2O source strength of tropical rainforest ecosystems. Matson and Vitousek [1990] estimated the global N2O source strength of tropical forest soils to be 2.4 Tg N yr−1 (= 1.8 Tg N yr−1 using our area estimate for tropical rainforests). Their estimate was based on upscaling of a limited number of publications (,10) on N2O fluxes from tropical rainforest soils using a simplified soil and vegetation classification scheme. A few years later, considering newly published data, Breuer et al. [2000] provided a new estimate of 3.55 Tg N yr−1 (= 2.6 Tg N yr−1 with our area), which is noticeably higher than our mean estimate. However, these ...
Abstract: The aim of this study is to examine the effect of individual canopy tree on the species composition and abundance of understorey vegetation in subtropical forests, by applying a model for tree influence on understorey vegetation of boreal spruce forests developed by Økland et al. (1999), according to the principles of Ecological Field Theory (EFT). The study was based upon five vegetation data sets, each with two subsets (vascular plants species and bryophytes species) from subtropical forests in south and southwest China. Optimal value of tree influence model parameters was found by maximizing the eigenvalue of a Constrained Ordination (CO) axis, obtained by use of the EFT-based tree influence index as the only constraining variable. One CO method, Redundancy Analysis (RDA), was applied to five vegetation data sets. The results showed that the optimal EFT tree influence models generally accounted for only a small part of the variation in species composition (the eigenvalues of RDA axes were
Author(s): Hawkins, Bradford A.; Diniz, JAF; Jaramillo, C A; Soeller, S A | Abstract: Aim The aim of this study was to test a variant of the evolutionary time hypothesis for the bird latitudinal diversity gradient derived from the effects of niche conservatism in the face of global climate change over evolutionary time. Location The Western Hemisphere. Methods We used digitized range maps of breeding birds to estimate the species richness at two grain sizes, 756 and 12,100 km(2). We then used molecular phylogenies resolved to family to quantify the root distance (RD) of each species as a measure of its level of evolutionary development. Birds were classified as basal or derived based on the RD of their family, and richness patterns were contrasted for the most basal and most derived 30% of species. We also generated temperature estimates for the Palaeogene across the Western Hemisphere to examine how spatial covariation between past and present climates might make it difficult to distinguish between
A well-matched influenza vaccine is effective in preventing ILI and reducing sickness absence in healthcare workers in tropical settings. Efforts need to be made to increase influenza vaccination rates and to improve the currently available vaccines.
Vitamin A deficiency during pregnancy of HIV infected and non-infected women in tropical settings of Northwest Ethiopia - up-to-the-minute news and headlines. 7thSpace is a online portal covering topics such as Family, Business, Entertainment, Headlines, Recipes and more. A place for the whole family featuring many different sections to chose from.
Temperate Climate refers to climates between Polar and Tropical. However, there is a gradual change from polar to tropical climates across the middle latitude temperate zones. Normally, in the northern hemisphere, the northern portions of the temperate zone feature Boreal, Continental, and Oceanic climates, while the southern portions of the temperate zone are often Mediterranean and humid subtropical climates. These different climates all fall within the temperate zone which has a basic definition as being any climate with a mean temperature above −3 °C (26.6 °F) but below 18 °C (64.4 °F) in the coldest month. Obviously winter temperatures will be more mild in southerly portions and colder in the more northerly portions of the northern temperate zone and vice-versa in the southern temperate zone. From a floristic standpoint, each of these climate zones have generally temperate vegetation. There is however, an obvious change in flora from the far northern portions of the temperate zone ...
Slight rises in temperatures are triggering rainforest trees to produce more flowers, reports a new study published in the journal Nature Climate Change. The research is based on observations collected in two tropical forests: a seasonally dry forest on Panamas Barro Colorado Island and a rainforest with year-around precipitation in Luquillo, Puerto Rico. The authors, led by Stephanie Pau, currently at Florida State University but formerly from UC Santa Barbara, analyzed the impact of changes in temperature, clouds and rainfall on flower production. They found an annual 3 percent increase in flower production at the seasonally dry site, which they attributed to warmer temperatures.
The main goal of this thesis was to investigate primary biogenic aerosol emission from the Amazon rain forest through measurements of vertical turbulent aerosol number fluxes. In addition, the particle dry deposition sink has been analysed and quantified, and is also compared with the dry deposition sink at a boreal forest site.. The total aerosol number flux of particles with diameter larger than 10 nm was dominated by downward fluxes at the rain forest site, even in the most pristine conditions in the wet season. This is an indication that the primary biogenic aerosol number source is small when considering the total particle size spectrum. However, size resolved aerosol number fluxes indicated net emission for particles with dry diameter 0.5-2.5 μm in clean conditions. These emission fluxes are likely explained by a primary biogenic aerosol source from the rain forest and seemed to be best correlated with horizontal wind speed, peaking during afternoon. Even though there are few particles in ...
The effect of Halamid® in tropical marine fish farming is much less documented, even if similar disease problems occur.. Axcentive has therefore performed a test program to understand if the beneficial effects under tropical conditions are similar to those in cold water fish farming.. Particular attention has been given to the safety of the treatment to the high value fish concerned. Focus has been given on managing clean conditions in the land-based growing of fingerlings. After all, grow-out in tropical areas is still mostly done in flow through sea-cages, where microbial loading of the water is much less of an issue.. Three farm stages have been investigated: the hatching of eggs, the larvae rearing and the nursery.. Eggs Fish eggs as received from own broodstock or external supplies can be a source of microbial contamination.. A simple egg wash in a Halamid® solution of 500-1000 ppm for 5-10 minutes showed 100 per cent effective in removing bacteria, including Vibrio. The hatchability of ...
plastering valuable is not specifically a helpful download Pesticide Residues in Coastal Tropical Ecosystems: Distribution, Fate, but Perhaps a obedient term with found managers to become follow selecting minutes. leverage by: Peer Resources Network report Lisa J. Lucas, an Associate Professor at West Chester University of Pennsylvania, even only as an other book and a practical data. Her service investigates to unleash a role of genetics and experiment into every size she uses.
The science of ecology fundamentally aims to understand species and their relation to the environment. At sites where hurricane disturbance is part of the environmental context, permanent forest plots are critical to understand ecological vegetation dynamics through time. An overview of forest structure and species composition from two of the longest continuously measured tropical forest plots is presented. Long-term measurements, 72 years at the leeward site, and 25 years at windward site, of stem density are similar to initial and pre-hurricane values at both sites. For 10 years post-hurricane Hugo (1989), stem density increased at both sites. Following that increase period, stem density has remained at 1400 to 1600 stems/ha in the leeward site, and at 1200 stems/ha in the windward site. The forests had similar basal area values before hurricane Hugo in 1989, but these sites are following different patterns of basal area accumulation. The leeward forest site continues to accumulate and increase basal
The plenary sessions provided the platform for interesting discussions on topical issues ranging from general toxicology to specialized ecotoxicology issues. Some of the highlights of the plenary presentations are described below. The plenary lecture delivered by Michiel Daam (Portugal) on Aquatic ecotoxicology of pesticides under temperate versus tropical climates demonstrated that there were no consistent differences between the degradation rates of some pesticides between temperate and tropical climates as well as no differences in sensitivities between temperate and tropical species to the pesticides. He also shared with the participants that with a creative mind, a lot can be achieved with very limited resources, as is usually the case in most African countries. This was a very welcome message for all participants.. In another lecture delivered by Mathew Muzi-Nindi (South Africa) on the topic Technological development in mass spectrometry and chromatography: pharmaceutical personal care ...
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The average temperature in a tropical dry forest is approximately 63 degrees Fahrenheit. Temperatures are generally higher during most months of the year in these regions....
Slot, Martijn, Rey-Sanchez, Camilo, Winter, Klaus, and Kitajima, Kaoru. 2014. Trait-based scaling of temperature-dependent foliar respiration in a species-rich tropical forest canopy. Functional Ecology. 28 (5):1074-1086. https://doi.org/10.1111/1365-2435.12263 ...
The Pelibuey (also known as Cubano Rojo) is a breed of domestic sheep raised in the Caribbean, Mexico, and South America. The Pelibuey is a breed of hair sheep, meaning they do not generally grow wool. This adaptation makes them especially useful for tropical environments where heavily wooled sheep do not thrive. The breed is thought to originate in Africa, specifically from the West African Dwarf sheep. This breed is primarily raised for meat. Pelibuey/Cuba. Breed Data Sheet. Domestic Animal Diversity Information System. Retrieved 2009-09-04. Pelibüey. Breeds of Livestock. Oklahoma State University Dept. of Animal Science. Retrieved 2009-04-28 ...
Townsville, north Queensland, is an example of a high-risk environment for skin cancer as its residents are of predominantly Anglo-Celtic descent living in a tropical environment with extreme ambient UVR (35). Our results indicate that the appearance of new MN in young Australian children raised in such an extreme UV environment is related to the total amount of time they spend in the sun, and the susceptibility of their skin to sun exposure. Sunburn experience, although significantly related with the incidence rate of MN bivariately, failed to reach significance after adjustment for propensity to burn. Sunburn experience remained significantly related to the incidence of MN only in the subgroup of children with no tendency to burn.. Of the five published longitudinal studies on nevus development in children and adolescents (9, 11-13, 25), only three examined the effect of individual sun exposure data on nevus development (9, 12, 13). The current study is the first which explores this issue in ...
WAMSI Dredging Science Node researchers have, for the first time, quantified dredging effects on seawater quality conditions, which is critical to realistic testing in the laboratory.. The literature review along with the examination of some large environmental monitoring datasets from recent dredging projects provided by Chevron Australia, Woodside Energy and Rio Tinto Iron Ore, have been published in PLOS ONE.. Lead author of the paper: Temporal Patterns in Seawater Quality from Dredging in Tropical Environments, Dr Ross Jones from the Australian Institute of Marine Science (AIMS), said bringing the current knowledge together means previous laboratory testing can be appraised on the relevance of the pressure fields used, and that future testing, including the next phase of WAMSIs dredging science program, now has a peer reviewed reference.. The reviews of existing monitoring datasets from industry have allowed us to more accurately quantify how dredging affects seawater quality conditions ...
The distinctive Mahogany and Natural two-tone coloration of the Belize Seating Collection by Summer Classics highlights the x-back design of the furniture. Named after a nation with a motto of the shade of the mahogany tree I flourish, Belize captures the feel of a lush tropical environment. Generously proportioned seating frames accommodate the included Dream blown-fiber cushions. Frame crafted from heavy-gauge, rust-resistant wrought aluminum Generously proportioned frames accommodate plush outdoor cushions Included Dream cushions high-density foam fill is crowned with a pillowtop of blown fiber on the Sofa, Lounge Chair and Swivel Rocking Lounge Chair Swivel Rocking Lounge Chair offers optimal comfort with its rocking and turning motion Two-tone antiqued Mahogany and Natural finish is hand applied Note: Due to the custom-made nature of the cushions, any fabric changes or
Fire Belly Newts are best kept in species tanks. They have very specific needs and will eat whatever they can fit in their mouths. They can also excrete a toxin from glands by their head which could harm other creatures. They are most definitely not compatible with other creatures that require a tropical environment ...
Fire Belly Newts are best kept in species tanks. They have very specific needs and will eat whatever they can fit in their mouths. They can also excrete a toxin from glands by their head which could harm other creatures. They are most definitely not compatible with other creatures that require a tropical environment ...
This condition occurs in people who have one of two possible gene s (i.e., they are heterozygous for the allele ) that code for the defective hemoglobin responsible for sickle-cell anemia . The codition is diagnosed by exposing an individuals red blood cell s to a low oxygen environment; if the trait is present, the cells will turn to a sickle shape. People with this trait may suffer milder symptoms of sickle-cell anemia, or may have no symptoms. Some scientists believe the trait actually provides an evolutionary advantage in tropical environments because the slightly altered shape of the blood cells causes a person to be more resistant to malaria ...
Poor DNA preservation is the most limiting factor in ancient genomic research. In the vast majority of ancient bones and teeth, endogenous DNA molecules only represent a minor fraction of the whole DNA extract, rendering traditional shot-gun sequencing approaches cost-ineffective for whole-genome characterization. Based on ancient human bone samples from temperate and tropical environments, we show that an initial EDTA-based enzymatic pre-digestion of powdered bone increases the proportion of endogenous DNA several fold. By performing the pre-digestion step between 30 min and 6 hours on five bones, we identify the optimal pre-digestion time and document an average increase of 2.7 times in the endogenous DNA fraction after 1 hour of pre-digestion. With longer pre-digestion times, the increase is asymptotic while molecular complexity decreases. We repeated the experiment with n=21 and t=15-30, and document a significant increase in endogenous DNA content (one-sided paired t-test: p=0.009). We ...
James Cook University hosted a welcome reception and awards nights themed GEMS of JCU for their partners in Sri Lanka under the patronage of Prof Marcus Lane, Deputy Vice Chancellor for Tropical Environments and Societies to recognise the efforts of their esteemed partners and to appreciate their contribution to the success and friendship over the years.. James Cook University was also represented by Prof Ron White, Acting Dean for College of Science and Engineering, Mr Vignesh Vijayaraghavan, Head-International Recruitment, Mr David Samuel, Regional Head - Sri Lanka & Maldives and Mr Gerald Joshua, Marketing Manager - South Asia. #gallery-1 { margin: auto; } #gallery-1 .gallery-item { float: left; margin-top: 10px; text-align: center; width: 25%; } #gallery-1 img { border: 2px solid #cfcfcf; } #gallery-1 .gallery-caption { margin-left: 0; } ...
The concentration of carbon dioxide in the atmosphere has reached the milestone of 400 parts per million, something not seen on earth for 2 or 3 million years. This time, it is driven by human emissions from burning coal, natural gas and petroleum. Climate change at this pace threatens 50,000 plant and animal species over the next 80 years, and it isnt entirely clear if the human species can survive in the new, unstable climate conditions we are creating.. Past periods of high carbon concentrations (then caused by volcanoes) led to a world with a third less land mass because of rising seas, no surface ice, tropical conditions everywhere including Antarctica, fish die-off from acid oceans, massive hurricanes, and storms and droughts that lasted for many years. Humans arose and are adapted to a colder world characteristic of the past 200,000 years, and may not be able to survive Tropical World 9 degrees F. / 5 degrees C. hotter than ours.. Environmentalists should make a full court press to close ...
Tropical rainforests (TRFs) harbour almost half of the worlds vascular plant species diversity while covering only about 6-7% of land. However, why species richness varies amongst the Earths major TRF regions remains poorly understood. Here we investigate the evolutionary processes shaping continental species richness disparities of the pantropical, epiphytic and mostly TRF-dwelling orchid mega-genus Bulbophyllum (c. 1948 spp. in total) using diversification analyses based on a time-calibrated molecular phylogeny (including c. 45-50% spp. each from Madagascar, Africa, Neotropics, and 8.4% from the Asia-Pacific region), coupled with ecological niche modelling (ENM) of geographic distributions under present and past (Last Glacial Maximum; LGM) conditions. Our results suggest an early-to-late Miocene scenario of out-of-Asia-Pacific origin and progressive, dispersal-mediated diversification in Madagascar, Africa and the Neotropics, respectively. Species richness disparities amongst these four TRF
Golley, F.B., J.T. McGinnis, R.G. Clements, G.I. Child, and M.J. Duever. 1969. The structure of tropical forests in Panama and Colombia. BioScience 19: 693-696.. Golley, F.B., J.T. McGinnis, R.G. Clements, G.I. Child, and M.J. Duever. 1975. Mineral Cycling in a Tropical Moist Forest Ecosystem. University of Georgia Press, Athens. 248 pp.. Olson, R.J., K.R. Johnson, D.L. Zheng, and J.M.O. Scurlock. 2001. Global and Regional Ecosystem Modeling: Databases of Model Drivers and Validation Measurements. ORNL Technical Memorandum TM-2001/196. Oak Ridge National Laboratory, Oak Ridge, Tennessee, U.S.A.. Additional Sources of Information: Clark, D.A., S. Brown, D.W. Kicklighter, J Q. Chambers, J R. Thomlinson, J. Ni, and E. A. Holland. 2001a. Net primary production in tropical forests: an evaluation and synthesis of existing field data. Ecological Applications, 11(2): 371-384.. Clark, D.A., S. Brown, D.W. Kicklighter, J.Q. Chambers, J.R. Thomlinson, J. Ni, and E.A. Holland. 2013. NPP Tropical Forest: ...
Although much of the sediment supplied to the coast under humid tropical conditions has been delivered by rivers, material has also been derived from the erosion of cliffs along the shore, and from the sea floor. Sediment has been carried onshore from shallow coastal waters to many parts of the worlds coastline, and it is likely that the deltas and coastal plains around Indonesia incorporate in their stratigraphy marine sediments that originated in this way. For example, marine clays are known to underlie parts of the extensive swampy lowlands of south-eastern Sumatra. Beaches Beaches of sand and gravel are extensive around the coasts of Indonesia, especially near the mouths of rivers delivering this kind of material, adjacent to cliffs of sandstone or conglomerate, and along shorelines to the rear of fringing coral reefs. Beach sediments of volcanic origin are typically black or grey; those of coralline origin white or yellow. Quartzose sands are of very localized occurrence in relation to ...
To overcome the limitations of traditional conservation treatments used for protection and consolidation of stone and lime mortars and plasters, mostly based on polymers or alkoxysilanes, a novel treatment based on the activation of indigenous carbonatogenic bacteria has been recently proposed and applied both in the laboratory and in situ. Despite very positive results, little is known regarding its effect on the evolution of the indigenous bacterial communities, specially under hot and humid tropical conditions where proliferation of microorganisms is favored, as it is the case of the Maya area. Here, we studied changes in bacterial diversity of severely degraded tuff stone and lime plaster at the archeological Maya site of Copan (Honduras) after treatment with the patented sterile M-3P nutritional solution. High-throughput sequencing by Illumina MiSeq technology shows significant changes in the bacterial population of the treated stones, enhancing the development of Arthrobacter, Micrococcaceae,
A new record of past temperature change in the tropical Atlantic Oceans subsurface provides clues as to why Earths climate is so sensitive to ocean circulation patterns, according to climate scientists at Texas A&M University.
A new record of past temperature change in the tropical Atlantic Oceans subsurface provides clues as to why the Earths climate is so sensitive to ocean circulation patterns, according to climate scientists at Texas A&M University.
Intensive tilapia production (Oreochromis niloticus) is an emerging industry in West Africa. Access and availability of economically viable formulated commercial fish feeds are major constraints. The availability and cost of animal source ingredients such as fishmeal (FM), typically used in limited amounts to ensure balanced diets and high performance, is a global issue. Research has been conducted to identify and utilize locally produced, cost-efficient feedstuffs to partially or completely replace FM with a focus on plant and animal by-products. Interest in insect-derived meals, particularly fly larvae (Musca domestica, Hermetia illucens, etc.) as potential replacements for FM in aquaculture diets has increased. Commercial quantities of insect larvae, maggot meal, (MM) can be produced under tropical conditions due to their high rates of reproduction, growth, and their ability to grow on a large variety of organic substrates. Given the nutritional value and profile (comparability of amino ...
In this context a new way of short-term meat preservation that could be especially beneficial for prolonged periods of handling of carcasses or meat cuts during transport, etc. should be mentioned. Meat surfaces are treated with organic acids such as acetic, lactic, citric, tartaric and ascorbic acid, as well as sodium sorbate. These compounds are from different natural foods and not toxic and may be used alone or in combination as dipping solutions or sprays on the surface of meat and meat products. Treatment of carcasses with these products has proved to be successful under conditions in developing countries. With an aqueous solution of 20 percent sodium sorbate, 5 percent sodium acetate and 5 percent sodium chloride sprayed on warm beef carcasses, the shelf-life of meat at 25° to 35°C was doubled. However, more work is needed on the subject, especially for tropical conditions. ...
During the so-called PETM period 55 million years ago, tropical conditions prevailed far beyond the equator and ice caps vanished from Earths poles.
HOUSHMAND, M. et al. Effects of non-antibiotic feed additives on performance, immunity and intestinal morphology of broilers fed different levels of protein. S. Afr. j. anim. sci. [online]. 2012, vol.42, n.1, pp.22-32. ISSN 2221-4062.. In order to investigate the effects of the dietary supplementation of organic acids, prebiotics and probiotics on broiler chickens, a total of 288 day-old male Cobb chicks were allocated in a completely randomized design according to a 2 x 4 factorial, consisting of two levels of crude protein (recommended or low (85% of recommended)) and a four feed-additive programme. The basal diet without any feed additive served as control and one of the following additives, organic acids, a prebiotic and a probiotic, were added to the basal diet to form the other treatments. Starter and finisher diets were offered from 1 to 21 d and 22 to 42 d of age, respectively. The birds were reared in an open-sided house system under natural tropical conditions with the same housing and ...
The research into the issue of maintainability of multi‐storey buildings in Sri Lanka is still in its dolescent stage. One of the critical building elements that require immediate attention for maintainability is flat roof areas. The flat roofs are often subjected to alternate drying and wetting cycles under tropical conditions, causing many defects and subsequent deterioration when proper detailing related to design, construction and maintenance actions are lacking. The inherent risks of maintainability of the buildings can be identified by analyzing their defects causing factors. In this research, 12 such risk factors related to the maintainability of flat roofs were identified. Further, a scoring system using Artificial Neural Networks (ANN) is developed to forecast the level of maintainability, which is projected, based on risk analysis. The level of maintainability of a typical flat roof is shown as 51%. The risk factors are also prioritized to give guidance ...
A study of the floristic and structural variations of a tree community was carried out in a tropical semideciduous forest fragment, located on the margins of the Capivari river, in Lavras, Minas Gerais, Brazil, to analyze the correlations between environmental variables (related to soil, topography and fragment shape) and the distribution of tree species. The study also aimed to increase the understanding on the floristic composition and phytosociological structure of tree communities in the upper Rio Grande region. Tree species were sampled in extensive collecting excursions as well as through 28 sample plots of 20 ´ 20 m, where all individuals with dbh ³ 5 cm were registered. The plots were distributed into five transects placed parallel to the predominant slope of each site. The environmental variables were obtained through a topographic survey of the fragment and chemical and textural analyses of soil samples. The correlations between the distribution of species abundance and environmental ...
Our home is in beautiful sunny Queensland, the Sunshine State, which is world-renowned for the Great Barrier Reef. Queensland has some of the most beautiful beaches in the world. These beaches are found both north and south of where we live, about an hours drive by car. Our house has been built for tropical living, open-planned design, timber floors and ducted air-conditioning throughout. Our neighbourhood is in a quiet estate and all amenities are within 5 klms from where we live. There is public transport available nearby. Our neighbours are friendly but private. Our home is set high on a hill and at night you can sit out on the covered timber deck while watching the stars above.. My husband and I are recently retired and are seeking to continue travelling, which is what were doing right now. We love to meet new people all over the world as well as in Australia and recently completed a caravan trip around Australia. I can speak un petit peu of French and have enjoyed practicing my ...
Gibba is Latin for hump, possibly referring to the bi-lobed swelling near the base of the flower lip (Chew 2009). The flowers, usually 2-6, are 4-25 mm long, yellow with brown or reddish nerves on the palate (swelling), which is densely hairy. The superior lip is circular obscurely 3-lobed; the inferior lip is usually shorter and narrower than the superior, circular as well, however usually entire and rarely emarginate. Typical of the genus is the presence of spurs. In this case, the spur is conical to narrowly cylindrical, the apex bearing a few shortly stalked glands (Kew 2002).. A bit fussy when it comes to flowering, our floating femme fatale will delight the pond community with its beautiful flowers only if hold near the surface by any kind of support such as vegetation or substrate. The flowers will be born on erect, solitary or often several inflorescences 2-35 cm high.. …maybe a useful carnivorous weed!. Although considered a weed in several countries, Utricularia gibba can have a ...
Singapore, an island city-state off southern Malaysia, is a global financial centre with a tropical climate and multicultural population. Founded as a British trading colony in 1819, since independence it has become one of the worlds most prosperous countries and boasts the worlds busiest port. Combining the skyscrapers and subways of a modern, affluent city with a medley of Chinese, Malay and Indian influences and a tropical climate, with tasty food, good shopping and a vibrant night-life scene, this Garden City makes a great stopover or springboard into the region. Singapore is often referred to as the Lion City, the Garden City and the Red Dot, and is the worlds only sovereign island city-state. Easiest place to do business (World Bank) for ten consecutive years, most Technology-ready nation (EIU), top International meetings city (UIA), city with Best investment potential (BERI), 2nd-most competitive country (WEF), 3rd-largestforeign exchange centre, 4th-largest financial centre, ...
Singapore, an island city-state off southern Malaysia, is a global financial centre with a tropical climate and multicultural population. Founded as a British trading colony in 1819, since independence it has become one of the worlds most prosperous countries and boasts the worlds busiest port. Combining the skyscrapers and subways of a modern, affluent city with a medley of Chinese, Malay and Indian influences and a tropical climate, with tasty food, good shopping and a vibrant night-life scene, this Garden City makes a great stopover or springboard into the region. Singapore is often referred to as the Lion City, the Garden City and the Red Dot, and is the worlds only sovereign island city-state. Easiest place to do business (World Bank) for ten consecutive years, most Technology-ready nation (EIU), top International meetings city (UIA), city with Best investment potential (BERI), 2nd-most competitive country (WEF), 3rd-largestforeign exchange centre, 4th-largest financial centre, ...
The National Museum of Natural History, located at 10th Street and Constitution Avenue, N.W., welcomed more than 8.4 million people during the year 2001, making it the most visited natural history museum in the world. Opened in 1910, the museum is dedicated to maintaining and preserving the world s most extensive collection of natural history specimens and human artifacts. It also fosters critical scientific research as well as educational programs and exhibitions that present the work of its scientists and curators to the public. The museum is part of the Smithsonian Institution, the world s largest museum and research complex. The Smithsonian s National Museum of Natural History is open every day from 10 a.m. to 5:30 p.m. Admission is free ...
Tropical rainforests are tropical moist forests of semi-deciduous varieties distributed across nine West African countries. Institute for Sea Research conducted a temperature record dating back to 700,000 years ago.[2] Several conservation and development demographic settings are such that the most loss of rain forests has occurred in countries of higher population growth. Lack of dependable data and survey information in some countries has made the account of areas of unbroken forest and/or under land use change and their relation to economic indicators difficult to ascertain. Hence, the amount and rate of deforestation in Africa are less known than other regions of tropics. The term deforestation refers to the complete obstruction of forest canopy cover for means of agriculture, plantations, cattle-ranching, and other non-forest fields. Other forest use changes for example are forest disintegration (changing the spatial continuity and creating a mosaic of forest blocks and other land cover ...
MRC CiC Tropical Infectious Disease Consortium Annual MeetingAccelerating Product Development Thursday 16 February 2017Manson Lecture Theatre and South Courtyard
Soil types are highly variable in the tropics and are the result of a combination of several variables such as climate, vegetation, topographic position, parent material, and soil age.[21] Most tropical soils are characterized by significant leaching and poor nutrients, however there are some areas that contain fertile soils. Soils throughout the tropical rainforests fall into two classifications which include the ultisols and oxisols. Ultisols are known as well weathered, acidic red clay soils, deficient in major nutrients such as calcium and potassium. Similarly, oxisols are acidic, old, typically reddish, highly weathered and leached, however are well drained compared to ultisols. The clay content of ultisols is high, making it difficult for water to penetrate and flow through. The reddish color of both soils is the result of heavy heat and moisture forming oxides of iron and aluminium, which are insoluble in water and not taken up readily by plants. Soil chemical and physical characteristics ...
The Amazonian Center for Environmental Resources (ACEER) is a nonprofit organization focused preserving the Peruvian and Amazonian rainforests. With climate change and deforestation at the forefront of global issues at the moment, the organization does its part by educating on rainforest preservation. ACEERs contributions dont just help the environment, its work also strives to reduce global poverty by helping the natives in the Amazonian rainforests and Peruvian regions.. ACEERs work to decrease deforestation helps the natives in the Amazonian rainforests keep their homes. Deforestation destroys the habitats of many animal and plant species which also destroys indigenous peoples home as the forests serve as their main source of food and shelter.. The organizations AMIGOS! program strives to give the children in Amazonian areas a quality education. The AMIGOS! program does a lot to help the Peruvian schools in cities such as Puerto Maldonado and Iquitos and rural areas. The program has been ...
Bats were marked and monitored on Barro Colorado Island, Panama, to study seasonal and annual variation in distribution, abundance, and natural history from 1975 through 1980. Data gathered advances our knowledge about flocking; abundance; feeding strategies; social behavior; species richness; population structure and stability; age and sex ratios; life expectancy and longevity; nightly, seasonal, and annual movements; synchrony within and between species in reproductive activity; timing of reproductive cycles; survival and dispersal of recruits; intra-and inter-specific relationships; and day and night roost selection. Barro Colorado Island (BCI) harbors large populations of bats that feed on the fruit of canopy trees, especially figs. These trees are abundant, and the individual asynchrony of their fruiting rhythms results in a fairly uniform abundance of fruit. When figs are scarce, a variety of other fruits is available to replace them. This relatively dependable food supply attracts a remarkably
There are two related discussions to textiles on Day 3. Panel Discussion on Day 3: - The Queen Sirikit Museum of Textiles: Establishing a Preservation and Conservation Framework. - Lao textile heritage: preserving a collection to promote weaving culture The Conservation of Material Culture in Tropical Climates: 3rd APTCCARN Meeting (Asia Pacific Twentieth Century Conservation Art Network) is a targeted forum for the dissemination and discussion of regionally relevant preservation solutions for Southeast Asias vast cultural record. Co-organised by the Centre for Cultural Materials Conservation (University of Melbourne, Australia) and Silpakorn University in Thailand under the APTCCARN (Asia Pacific Twentieth Century Conservation Art Network), the program brings international experts engaged with the conservation of material culture in hot, humid climates to this event in Thailand. The program aims to disseminate recent findings coordinated under the larger strategic agenda of APTCCARN ...
The Bulletin, published continuously since 1881, consists of longer monographic volumes in the field of natural sciences relating to zoology, paleontology, and geology. Current numbers are published at irregular intervals. The Bulletin was originally a place to publish short papers, while longer works appeared in the Memoirs. However, in the 1920s, the Memoirs ceased and the Bulletin series began publishing longer papers. A new series, the Novitates , published short papers describing new forms ...
In order to better assess the spatial variability in subtropical forest biomass, the goal of our study was to use small-footprint, discrete-return Light Detection and Ranging (LiDAR) data to accurately estimate and map above- and below-ground biomass components of subtropical forests. Foliage, branch, trunk, root, above-ground and total biomass of 53 plots (30 × 30 m) were modeled using a range of LiDAR-derived metrics, with individual models built for each of the three dominant forest types using stepwise multi-regression analysis. A regular grid covered the entire study site with cell size 30 × 30 m corresponding to the same size of the plots; it was generated for mapping each biomass component. Overall, results indicate that biomass estimation was more accurate in coniferous forests, compared with the mixed and broadleaved plots. The coefficient of determination (R2) for individual models was significantly enhanced compared with an overall generic, or common, model. Using independent stand-level
If you have a question about this talk, please contact Dr Francis Pope.. Organic aerosols in the atmosphere are one of the largest uncertainties in trying to predict climate change. Their formation processes are poorly understood and recent evidence has shown that even volatile compounds not expected to have a role in particle formation may be a significant source of secondary organic aerosols. One of the difficulties in trying to study SOA is the huge number of compounds present. This talk will highlight some of our recent advances in understanding aerosol formation, properties and sources using state of the art chromatographic techniques. We have simulated organic aerosol in smog chambers and compared this to urban, marine and tropical environments using high resolution two dimensional gas chromatography (GCXGC) and liquid chromatography coupled to mass spectrometry (LC-MS).. This talk is part of the Centre for Atmospheric Science seminars, Chemistry Dept. series.. ...
Anchored in the recovery success of Alcoholics Anonymous, Narcotics Anonymous and other 12-Step programs and integrated with proven professional clinical therapies and strategies, New River Cove adds a unique and exciting eco-recovery, adventure milieu. Activities include horseback riding, kayaking, ropes course, meditation, yoga and other holistic strategies as well as excursions that include snorkeling at Caye Caulker in the Caribbean Sea, guided tours through regional Mayan Ruins and visits to natural rainforest settings. Within the therapeutic container of our abundant and natural tropical environment, our extensive fitness center, the cultural diversity of Belize, and the competence of our clinical team, clients have a reflective and health enhancing experience that begins a new lifetime of recovery, un dia a la vez (one day at a time). Clients gradually and intentionally follow their therapeutic plan with movement in the three spheres of Mind, Body, and Spirit. Movement includes ...
Education. Ph.D., University of California, Santa Barbara, 1985. M.A., University of California, Santa Barbara, 1981. B.S., B.S. Michigan State University, 1976. Awards. Cooperative Conservation Award, Department of the Interior, 2007. Faculty Scholars Medal, Penn State, 2004. Presidential Young Investigator Award, National Science Foundation, 1991. Research Interests. Autotrophic Symbiosis. My research interests include the physiology of the animals and the ecology of the communities that inhabit cold seeps and hydrothermal vents in the deep sea. Much of this research focuses on the functioning of the major players in these communities: animals harboring autotrophic symbionts. These types of symbiotic associations are extremely important in the worlds oceans, where symbiont-dependent species are often the primary ecosystem-structuring organisms in both shallow tropical environments, such as coral reefs, and in the deep sea where biomass may be limiting. The importance of the symbioses between ...
The company has gained a reputation for integrity based on providing high quality products as well as providing excellent customer service. White Malaysian kratom concentrate wax Kratom kratom is available in tincture extract powder or capsules. The various options make it easy to buy Kratom in a formulation that is right for specific purposes. And when it comes to quality the products offered at Arena Ethnobotanicals are unmatched.. Over 25 alkaloids have been isolated in Kratom Mitragyna most importantly. As White Malaysian Kratom Mitragyna is an opiate substitute they say that Kratom is a treatment for opiate addiction. A small number of consumers use Kratom to prolong sexual intercourse.. It has also been observed that if they are not grown within their natural tropical environment the leaves usually fall with colder temperatures mostly around 4 degrees Celsius. Recently Kratom is even used by young people to make a refreshing drink using tea made from its leaves. Buy Kratom ? Guide to ...
Main description: Prevent, evaluate, and manage diseases that can be acquired in tropical environments and foreign countries with The Travel and Tropical Medicine Manual. This pragmatic, pocket-sized resource equips medical providers with the knowledge they need to offer effective aid, covering key topics in pre- and post-travel medicine, caring for immigrants and refugees, and working in low-resource settings. Its also the perfect source for travelers seeking quick, easy access to the latest travel medicine information.. ...
Melaleuca is a type of tree that is indigenous to Australia and New Zealand, but can grow well in most tropical environments, including the Florida...
Military contingency operations in tropical environments and potential use of biological weapons by adversaries may place troops at risk for potentially lethal contagious infections (e.g., viral hemorrhagic fevers, plague, and zoonotic poxvirus infections). Diagnosis and treatment of such infections would be expedited by evacuating a limited number of patients to a facility with containment laboratories. To safely evacuate such patients by military aircraft and minimize the risk for transmission to air crews, caregivers, and civilians, the U.S. Army Medical Research Institute of Infectious Diseases maintains an aeromedical isolation team. This rapid response team, which has worldwide airlift capability designed to evacuate and manage patients under high-level containment, also offers a portable containment laboratory, limited environmental decontamination, and specialized consultative expertise. This article also examines technical aspects of the team's equipment, training, capabilities, and
Country: PanamaAlcohol Percentage: 43%Size: 700mlMade from fermented molasses distilled in column stills, this Panama 2011 displays vanilla, pastry, exotic wood and dried fruit flavours. This rum has matured close to the Panama Canal in Bourbon barrels for 6 years in tropical conditions and then 1 year in Europe.Profil
TY - JOUR. T1 - A study of formaldehyde chemistry above a forest canopy. AU - Sumner, Ann Louise. AU - Shepson, Paul B.. AU - Couch, Tara L.. AU - Thornberry, Troy. AU - Carroll, Mary Anne. AU - Sillman, Sandy. AU - Pippin, Margaret. AU - Bertman, Steven. AU - Tan, David. AU - Faloona, Ian. AU - Brune, William. AU - Young, Valerie. AU - Cooper, Owen. AU - Moody, Jennie. AU - Stockwell, William. PY - 2001/10/27. Y1 - 2001/10/27. N2 - Gas-phase formaldehyde (HCHO) was measured at a mixed deciduous/coniferous forest site as a part of the PROPHET 1998 summer field intensive. For the measurement period of July 11 through August 20, 1998, formaldehyde mixing ratios ranged from 0.5 to 12 ppb at a height ∼10 m above the forest canopy, with the highest concentrations observed in southeasterly air masses. Concentrations varied on average from a mid-afternoon maximum influenced by photochemical production of 4.0 ppb, to a late night minimum of 2.2 ppb, probably resulting from dry depositional loss. An ...
Underlined]]Saltator[[Underlined]], Jun, 10,1961,II [[upper right corner, 57 circled]] [[Hatch marks indicating the following species are along the left side. Red hatch marks=Buff-throated (maximus) see Trascription pg46/pg1 May 16 1958]] Similar calls uttered during the chases of the Buff-throats. These appeared to be Rs probably lower intensity than many or most of the Rs uttered during the dispute described in my notes of May 30,1961. Never included many syllables in a single series. (Most of the Rs heard during these chases were very reminiscent of the Rs of Summer Tanagers in sound! Some of the Rs of the Buff-throats during these chases might possibly be transcribed as Tit tit tit tit rather than Tuk tuk tuk...). The number of notes per R was somewhat variable. I think the Rs with fewest syllables tend to be slower than Rs with more syllables. The Buff-throats also uttered a few Wbls during the chases of the second day, in addition to their Rs. By this morning, chasing had ...
A study on sampling of mosquitos using eco-friendly mosquito trap in around Jiwaji University Campus (India). Abstract : Mosquitoes are the most important among all arthropod vectors that causes human disease in the tropical conditions. In order to reduce the mosquito nuisance and risk of diseases caused by them it is essential to reduce mosquito populations. All Iinn Mosquito Trap/Killer was placed in four different outdoor locations. Out of total insects trapped, the percentage of mosquitoes was 36 %, 45 %, 35 % and 36 in case of Backyard of animal house, Backyard of Aryabhatt boys hostel, Front part and Fish pond area of School of Studies in Zoology, Jiwaji University, Gwalior respectively ...
It has been noted that, in tropical conditions, it was not necessary to heat the molasses in order to obtain a good block when 10 percent of calcium oxide was used as a gelling agent. This observation is of primary importance when blocks are manufactured in a unit separate from the sugar factory as was the case in Senegal.. The cold process involves a horizontal paddle mixer, with double axes, which is used to mix, in the following order of introduction, molasses (50 percent), urea (10 percent), salt (5 percent), calcium oxide (10 percent) and bran (25 percent). The mixture is then poured into moulds (plastic masons pails or a frame made of four boards 2.5 m x 0.2 m). After about 15 hours, blocks may be removed from the mould and they may be transported by truck after 2 days.. Calcium oxide may be replaced by cement, but when cement is used it is important to mix it previously with about 40 percent of its weight in water, and common salt to be included in the block. This ensures its binding ...
Ecologists have recently interpreted patterns of phylogenetic distance among coexisting species as indicative of processes affecting community assembly during forest succession. We investigated plant community phylogenetic structure along a successional gradient in New Guinean lowland rain forest. We surveyed all trees with diameter at breast height ≥ 5 cm in nineteen 0.25 ha plots representing younger secondary, older secondary, and primary forest. We estimated plant community phylogeny from rbcL gene sequences to quantify change in phylogenetic structure during succession. Mean phylogenetic distance among co-occurring trees increased with total basal area per plot, a proxy for forest age. Significant phylogenetic clustering was detected in secondary forest whereas primary forest was significantly over-dispersed relative to null expectations. We examined the sensitivity of these patterns to various methods of branch length estimation and phylogenetic uncertainty. Power to detect community ...
Oxidant and Particle Photochemical Processes above a South-East Asian tropical rain forest (OP3-Danum-08) is a 3-year Consortium Grant of the Natural Environment Research Council (NERC), beginning 1 October 2007.. The objectives of the OP3 project are (i) to understand how emissions of reactive trace gases from a tropical rain forest mediate the production and processing of oxidants and particles in the troposphere, and (ii) to better understand the impact of these processes on local, regional and global scale atmospheric composition, chemistry and climate. ...
It is now widely accepted that global climate change is affecting many ecosystems around the globe and that its impact is increasing rapidly. Many studies predict that impacts will consist largely of shifts in latitudinal and altitudinal distributions. However, we demonstrate that the impacts of global climate change in the tropical rainforests of northeastern Australia have the potential to result in many extinctions. We develop bioclimatic models of spatial distribution for the regionally endemic rainforest vertebrates and use these models to predict the effects of climate warming on species distributions. Increasing temperature is predicted to result in significant reduction or complete loss of the core environment of all regionally endemic vertebrates. Extinction rates caused by the complete loss of core environments are likely to be severe, nonlinear, with losses increasing rapidly beyond an increase of 2°C, and compounded by other climate-related impacts. Mountain ecosystems around the ...
More than half of the worlds tropical forests are currently recovering from human land use, and this regenerating biomass now represents the largest carbon (C)-capturing potential on Earth. How quickly these forests regenerate is now a central concern for both conservation and global climate-modeling efforts. Symbiotic nitrogen-fixing trees are thought to provide much of the nitrogen (N) required to fuel tropical secondary regrowth and therefore to drive the rate of forest regeneration, yet we have a poor understanding of how these N fixers influence the trees around them. Do they promote forest growth, as expected if the new N they fix facilitates neighboring trees? Or do they suppress growth, as expected if competitive inhibition of their neighbors is strong? Using 17 consecutive years of data from tropical rainforest plots in Costa Rica that range from 10 y since abandonment to old-growth forest, we assessed how N fixers influenced the growth of forest stands and the demographic rates of ...
Physical education is important for children because engaging in physical activity will provide them with life-long better health.33 There is a recommendation that children in primary school should spend 150 min on physical education each week, ranging from moderate to vigorous for at least 50% of the physical education time.34 Our main concern is that if the class is held outdoors in intense heat, the children may become vulnerable to heat injury. Therefore, in order to prepare an optimal physical education programme, particular care to quantity and intensity of the exercise should be taken to prevent heat illness.. This is the first published report from Southeast Asia to provide descriptive information on the physiological responses of primary school children under real-life situation while exercising outdoors during their physical education class in hot and humid environment.. The climatic conditions in Bangkok are moderately hot and humid. The students of this study were exposed to high ...
Suture zones, shared regions of secondary contact between long-isolated lineages, are natural laboratories for studying divergence and speciation. For tropical rainforest, the existence of suture zones and their significance for speciation has been controversial. Using comparative phylogeographic evidence, we locate a morphologically cryptic suture zone in the Australian Wet Tropics rainforest. Fourteen out of 18 contacts involve morphologically cryptic phylogeographic lineages, with mtDNA sequence divergences ranging from 2 to 15 per cent. Contact zones are significantly clustered in a suture zone located between two major Quaternary refugia. Within this area, there is a trend for secondary contacts to occur in regions with low environmental suitability relative to both adjacent refugia and, by inference, the parental lineages. The extent and form of reproductive isolation among interacting lineages varies across species, ranging from random admixture to speciation, in one case via ...
Despite being instrumental in forest ecology, the definition and nature of shade tolerance are complex and not beyond controversy. Moreover, the role it plays in the trait-demography relationship remains unclear. Here, we hypothesize that shade tolerance can be achieved by alternative combinations of traits depending on the species functional group (evergreen vs. deciduous species) and that its ability to explain the array of traits involved in demography will also vary between these two groups. We used dimension reduction to identify the main trait spectra for 48 tree species, including 23 evergreens and 25 deciduous - dispersed across 21 genera and 13 families. We assessed the relationship between functional traits, shade tolerance, and demographic performance at high and low light using structural equation modelling. The dimensions found corresponded to the trait spectra previously observed in the literature and were significantly related to measures of demography. However, our results ...
White-cheeked Turaco (Turaco leucotis) sitting among epiphytes in cloud forest canopy, Kaffa, Southern Ethiopia, East Africa December 2008 - Bruno D'Amicis
For my birthday this year, I spent two weeks traveling with my parents on their first trip to Central America, went on a site visit to repair a septic system for a US-built former radio tower in the jungle, tagged along with a visiting friend to a phenomenal tropical-design home in the mountains, got repeatedly lost in the confounding elevators of the building formerly known as Trump Ocean Club, checked in with the Panama chapter of the #PrattMafia, did a self-directed windshield tour of the Areas Revertidas, bumped into a friend I had not seen in six years while hiking up a trail alone, touched up the paint on the boat, received (affordable) medical care for a parasite that had taken up residence in my foot, sent out my first Spanish-language CV, spent a day on Barro Colorado Island, jammed to Panamanian band playing Nirvana covers, went on a dinghy ride with the cat and heard kids calling out his name from the pueblo, got Rolfed, hung around the Smithsonian cafeteria eating soup like a spy ...
This dissertation examines the effects of taxes and policy instruments that aim to regulate climate services from forests. It consists of a summary section and four articles. Articles (I) and (II) examine the effects of taxes on management decisions in the context of managed boreal forests distinguished by forest-owners amenity preferences and also their age. Articles (III) and (IV) examine the role of carbon-based policy instruments in the presence of taxes on land incomes in curbing tropical deforestation. Article (I) reveals that the intensity of forest-owners preferences for forest amenities affects the non-neutrality of forest taxes pertaining to forest harvesting. Therefore, the effects of taxes depend on this intensity. This highlights the importance of developing methods to measure forest-owners amenity preferences quantitatively. Article (II) shows that the age of forest-owners governs their propensity to consume as opposed to leave bequests. Furthermore, it shown that the effects of ...
Altered wind conditions and light climate lead to a general change in the microclimate at the forest edges. Big old trees are particularly vulnerable to these factors. With the help of FORMIND, a forest simulation software developed at the UFZ, the researchers modelled different sizes of forest patches left over after landscape fragmentation. The smaller a patch of forest is, the worse is the ratio between edge and area. Simulation results suggest that a natural tropical forest of our study area contained approximately 250 tonnes of aboveground biomass per hectare, a forest fragment measuring 100 hectares has around 228 tonnes of biomass per hectare, while a patch of rain forest measuring one hectare has only 140 tonnes of biomass per hectare. In other words, the biomass in the forest remnants in this study fell by as much as 40 per cent. This finding is of great significance for the function of rain forests as a biomass store. It is important to be clear about the fact that we are losing more ...
Research Article Ecological traits of phyllostomid bats associated with sensitivity to tropical forest fragmentation in Los Chimalapas, Mexico. José Luis García-García 1 *, Antonio Santos-Moreno 1 and
Detlev Kelm from the Leibniz Institute for Zoo and Wildlife Research in Berlin (IZW) and Kerstin Wiesner and Otto von Helversen from the University of Erlangen -Nuremberg report that the deployment of artificial bat roosts significantly increases seed dispersal of a wide range of tropical forest plants into their surroundings, providing a simple and cheap method to speed up natural forest regeneration.. Tropical forests are of global ecological importance. They are a key contributor to the global carbon balance and are host to a major part of the worlds biodiversity. Between 2000 and 2005, worldwide net losses of tropical forest cover averaged 0.18 % annually and regionally even exceeded 1.5 % annually in some Latin American countries. Forest is usually replaced by agriculture. Often soils become rapidly infertile and land is abandoned. Because deforested areas rarely offer much food or protection for seed dispersers such as birds or small mammals, natural forest regeneration is hampered by a ...
Relationship of microbial activity and abundance to soil properties in Yucatan SDTF.Due to the lower water supply, SDTFs usually have a lower decomposition rate (25), higher soil C and N concentrations (33), and a more open N cycle (characterized by high N inputs and losses) than their wet counterparts (34). These properties can explain why the organic C contents found in these soils are larger than values reported for any other tropical soil (35). These soils also contain variable amounts of organic matter, which are in the same range as those reported for other Yucatan forest soils (27, 31). Furthermore, the experimental plots are found in nutrient-poor areas because of the regions recent geological origin, where karstic substrate dominates the landscape (30). In particular, recent studies have documented that karst soils contain abundant organic matter, which is mainly stored in the soil surface (36, 37). In addition, the karstic soils of the Yucatan have high potential to form aggregates ...
This paper presents the main findings of the effect of indoor humidity on occupants thermal comfort in the humid tropics of Malaysia. An extensive field investigation was carried out in Kota Kinabalu city and the surrounding areas, located in East Malaysia. A total of 890 individuals were asked to complete a questionnaire. Measured indoor climates were also recorded. The survey was designed as cross sectional data collection. The present investigation found that the occupants were thermally comfortable at wide relative humidity range. The mean relative humidity corresponding to the optimum comfort temperature was close to 73%. Regression models failed to predict accurately the effect of relative humidity on occupants thermal perceptions. In addition, a quadratic regression model was developed for the prediction of the mean indoor relative humidity based on indoor temperature. The suggested regression model can be used for an approximate prediction of indoor relative humidity when required.
Malarial thrombocytopenia (MT) and its haemorrhagic effect on haemophiliacs have not been studied in Nigeria. We hypothesized that the risk of malarial thrombocytopenic bleeding (MTB) among haemophiliacs with MT in Nigeria would be affected by demographic and clinical factors that may affect platelet function, host susceptibility to malaria or its clinical severity. To determine incidence, pattern, demographic and clinical risk factors of MTB among haemophiliacs with MT, we retrospectively studied 95 haemophiliacs with MT with respect to MTB, age, sex, severity of haemophilia, thrombocytopenia, parasitemia, haemoglobin (Hb) phenotypes and ABO blood groups. Relative risk (RR) of MTB for each parameter was calculated. Out of 95 haemophiliacs with MT, 16(16.8%) had muco-cutaneous MTB. No significant difference in frequency of severe haemophilia between haemophiliacs with and without MTB (50% vs.48.1%, RR=1.1, p=0.89). But haemophiliacs with MTB had higher frequency of age , 5 years (81.3% vs. ...
Forest ecosystem models based on heuristic water stress functions poorly predict tropical forest response to drought partly because they do not capture the diversity of hydraulic traits (including variation in tree size) observed in tropical forests. We developed a continuous porous media approach to modeling plant hydraulics in which all parameters of the constitutive equations are biologically interpretable and measurable plant hydraulic traits (e.g., turgor loss point π tlp, bulk elastic modulus ε, hydraulic capacitance C ft, xylem hydraulic conductivity k s,max, water potential at 50 % loss of conductivity for both xylem ( P 50,x) and stomata ( P 50,gs), and the leaf : sapwood area ratio A l: A s). We embedded this plant hydraulics model within a trait forest simulator (TFS) that models light environments of individual trees and their upper boundary conditions (transpiration), as well as providing a means for parameterizing variation in hydraulic traits among individuals. We synthesized ...
Siew Te Wong: As I mentioned earlier, sun bears, like many kinds of wildlife, are forest-dependent species. For the forested areas that were destroyed and converted to other land uses, it is too late for us to do anything. We simply cannot recreate a tropical rainforest that is the same as the original forest. Our efforts to save sun bears should prioritize the full protection of existing forest from deforestation and any kind of disturbance. Different countries in SE Asia have unique problems in land use and forest conservation issues. Here Ill look at how the timber and palm oil industries in Malaysia and Indonesia can help the plight of sun bears. Sun bear can live well in good selectively logged forest. I am emphasizing good because selective logging has been transformed from a relatively low impact logging practice (only few commercial valuable timber stands were removed from the forest) in the past, to a highly destructive, nearly clear-cut type of practice now-a-days due to the ...
Unique and magic tours to an authentic tribe in the amazon rainforest, this is an unforgettable journey to the huaoroni tribe who still preserve their ancestral traditions of the jungle
Site Information The study site includes two sub-plots, a forest stand that had developed atop a perched water table on a typical valley terrace; and a contrasting forest stand on a lower slope site. The forest on the terrace flat (site BPa) is an evergreen seasonal forest, low in height, biomass and basal area, and rich in palms. The plateau site of the terraces for which these stands are typical, is characterized by soils of low bioelement status, by long phases of high water saturation, enforced concentration of roots on the surface of the mineral soil and the associated accumulation of an organic layer, and irregular phases of drought. It is believed that frequent windthrows and drought result in high mortality, preserve a youthful stage of trees in the primary forest, and strengthen the competitive position of palms. The terrace forest has a simple two-layered structure. There is a thick continuous canopy with a height between 6 and 14 m (average maximum diameter of 15 cm dbh), and a second ...
h1 vvrhsika history bronchitis plant spirit shamanism medicinal plants the amazon rainforest h1 vvrhsika working teacher plants known the shaman diet purpose the diet to prepare body nervous system the powerful knowledge expansion consciousness by teacher
Operation Canope+? in tropical rain forest canopy of Paracou, French Guiana in November 1996. Photographs of the blimp and inflatable canopy raft.
Evidence shows that many tree species can take up organic nitrogen (N) in the form of free amino acids from soils, but few studies have been conducted to compare organic and inorganic N uptake patterns in temperate and tropical tree species in relation to mycorrhizal status and successional state. We labeled intact tree roots by brief 15N exposures using field hydroponic experiments in a temperate forest and a tropical forest in China. A total of 21 dominant tree species were investigated, 8 in the temperate forest and 13 in the tropical forest. All investigated tree species showed highest uptake rates for NH4+ (ammonium), followed by glycine and NO3− (nitrate). Uptake of NH4+ by temperate trees averaged 12.8 μg N g−1 dry weight (d.w.) root h−1, while those by tropical trees averaged 6.8 μg N g−1 d.w. root h−1. Glycine uptake rates averaged 3.1 μg N g−1 d.w. root h−1 for temperate trees and 2.4 μg N g−1 d.w. root h−1 for tropical trees. NO3− uptake was the lowest ...
Evidence shows that many tree species can take up organic nitrogen (N) in the form of free amino acids from soils, but few studies have been conducted to compare organic and inorganic N uptake patterns in temperate and tropical tree species in relation to mycorrhizal status and successional state. We labeled intact tree roots by brief 15N exposures using field hydroponic experiments in a temperate forest and a tropical forest in China. A total of 21 dominant tree species were investigated, 8 in the temperate forest and 13 in the tropical forest. All investigated tree species showed highest uptake rates for NH4+ (ammonium), followed by glycine and NO3− (nitrate). Uptake of NH4+ by temperate trees averaged 12.8 μg N g−1 dry weight (d.w.) root h−1, while those by tropical trees averaged 6.8 μg N g−1 d.w. root h−1. Glycine uptake rates averaged 3.1 μg N g−1 d.w. root h−1 for temperate trees and 2.4 μg N g−1 d.w. root h−1 for tropical trees. NO3− uptake was the lowest ...