Forest dynamics plots, which now span longitudes, latitudes, and habitat types across the globe, offer unparalleled insights into the ecological and evolutionary processes that determine how species are assembled into communities. Understanding phylogenetic relationships among species in a community has become an important component of assessing assembly processes. However, the application of evolutionary information to questions in community ecology has been limited in large part by the lack of accurate estimates of phylogenetic relationships among individual species found within communities, and is particularly limiting in comparisons between communities. Therefore, streamlining and maximizing the information content of these community phylogenies is a priority. To test the viability and advantage of a multi-community phylogeny, we constructed a multi-plot mega-phylogeny of 1347 species of trees across 15 forest dynamics plots in the ForestGEO network using DNA barcode sequence data (rbcL, matK, and
Tropical Biomes of the World Tropical Evergreen Forests (rain forests) Tropical Deciduous Forests (seasonal forests or monsoon forests) Tropical Scrub Forests Tropical Grasslands Tropical Rain Forests
TROPICAL RAIN FORESTS OF THE WORLD VOCABULARY: lines of latitude - lines that run east-west on a globe; parallel to the equator LATITUDES OF TROPICAL RAIN FOREST REGIONS: Lines of latitude show how far
All About Tropical Climates - Learn Fun Natural Science Facts about the Tropical Climates. More Earth Science Fun Facts at our Easy Science for Kids Website
To evaluate an artificial insemination program in postpartum Bos indicus cows and by using deterministic models, to estimate the possible economic advantages of insemination by appointment over detected estrus, sixty-three multiparous animals were synchronized using a progestagen device inserted at day 31 and withdrawn after 9 days (average time for withdrawal was 40.9 ± 6.8 days). Cows were observed continuously from 0700 to 1800 during 72 h. The percentage of animals detected positive to estrus by riding behavior was 43.4%, transrectal palpation, 22% and heat detector patches, 4.6%. The percentage of cows ovulating as evidenced by progesterone samples taken at 9 and 11 days after the average estrus response was 73%. The economical assessment by using the values obtained in the present study afforded that the cost of semen, ovulation rate and fertility point to a definitive advantage of using AI at fixed time over a program based on estrus detection.
The answer is as follows: a) The engine room in the Victoria class submarines contains large diesel engines that operate, when required, in a confined space that receives minimal cooling air. Like all the machinery rooms in Canadian warships operating under tropical conditions, the peak temperatures were uncomfortable. Submarines pose the greatest challenge in this regard, since, by design, they do not have regular access to outside air. For this reason, along with most modern machinery spaces, the Victoria class submarines have an automated engine room and the need for the continuous presence of engine room operators is limited.. b) This was the Canadian Navys first experience of operating a Victoria class submarine under tropical conditions. The data collected to date suggests that the environmental conditions, tropical or temperate, do not significantly influence the engine room temperature since the majority of outside air introduced to the space is devoted to supporting combustion in the ...
Development condition: The solvent is allowed to migrate until the front reaches a line 15 cm from the starting line.. Detection: The plate is examined under ultraviolet light at a wavelength of maximum output at about 254 nm and then at 365 nm. After spraying the plate with a 20% solution of nitric acid, heating at 110-120 °C, cooling and again spraying with a 5% solution of potassium hydroxide in ethane 50%, it is examined in daylight.. Results: The reference solution of senna leaf shows numerous spots of different intensities. Important changes are observed after procedures A and B, some spots disappear and new ones occur.. ...
Development conditions: The solvent is allowed to migrate until the front reaches a line 15 cm from the starting line.. Detection: The plate is examined under ultraviolet light at a wavelength of maximum output at about 254 nm, then left in a chromatographic chamber containing some iodine crystals until spots appear. A second plate is sprayed with a 5% solution of phosphomolybdic acid in acetic acid containing 5% of sulfuric acid.. Results: A reference solution of hydrocortisone sodium succinate shows a main spot and several weak secondary spots; the spot at Rf 0.18 corresponds to hydrocortisone, another at Rf 0.58. A solution of the sample subjected to procedure A shows that the spot at Rf 0.18 decreases, whereas the spot at Rf 0.58 increases. After procedure B, the change is even more significant.. ...
A simple and robust technique for the extraction of DNA under tropical field conditions is described. It requires minimal equipment and is based on lysing cells in whole blood and precipitating the nuclei containing the DNA by centrifugation. The DNA solution can be stored in guanidinium buffer for many months without being refrigerated. Further purification of the DNA can then be carried out in a laboratory with facilities for ultracentrifugation by banding the DNA through cesium chloride. This method yields DNA of sufficient quality and purity for Southern blotting and probing and alleviates the need to transport whole blood between different countries and laboratories.. ...
Skiba, U.; Fowler, D.; Smith, K.A.. 1996 Nitric oxide emissions from agricultural soils in temperate and tropical climates: sources, controls and mitigation options. [Speech] In: International workshop on NOx emission from soils and its influence on Atmospheric Chemistry, Tsukuba, Japan, 4-6 March 1996. (Unpublished) Full text not available from this repository. (Request a copy ...
Palm Trees in tropical climate Clear iPhone Case by Ib Photography. Worldwide shipping available at Society6.com. Just one of millions of high quality products available.
Climate change is affecting biodiversity and ecosystem function worldwide, and the lowland tropics are of special concern because organisms living in this region experience temperatures that are close to their upper thermal limits. However, it remains unclear how and whether tropical lowland species will be able to cope with the predicted pace of climate warming. Additionally, there is growing interest in examining how quickly thermal physiological traits have evolved across taxa, and whether thermal physiological traits are evolutionarily conserved or labile. We measured critical thermal maximum (CTmax) and minimum (CTmin) in 56 species of lowland Amazonian frogs to determine the extent of phylogenetic conservatism in tolerance to heat and cold, and to predict species vulnerability to climate change. The species we studied live in sympatry and represent ~65% of the known alpha diversity at our study site. Given that critical thermal limits may have evolved differently in response to different
article{d43571e8-9404-4105-995f-39f0d1776da2, author = {Hicks, Lettice C and Meir, Patrick and Nottingham, Andrew T and Reay, Dave S and Stott, Andrew W and Salinas, Norma and Whitaker, Jeanette}, issn = {0038-0717}, language = {eng}, pages = {212--222}, publisher = {Elsevier}, series = {Soil Biology and Biochemistry}, title = {Carbon and nitrogen inputs differentially affect priming of soil organic matter in tropical lowland and montane soils}, url = {http://dx.doi.org/10.1016/j.soilbio.2018.10.015}, doi = {10.1016/j.soilbio.2018.10.015}, volume = {129}, year = {2019 ...
Today, about 6 percent of the surface of Earth is covered in rainforests, and more than half of all the worlds plant and animal species live in them. The shear biomass of plants in the rainforest help produce about 40 percent of Earths oxygen.. Estimates of the Earths biodiversity originally came from studies in Panama, where tree species were logged and the number of insects within them categorized and counted. Estimates range from 10 to 100 million species on earth, most of them being insects found in the tropical rain forests.. The tropical rainforests have more kinds of trees than any other biome in the world. In a rainforest in South America, scientists counted from 100 to 300 species of tree in 2.5 acre sections of the forest. Not all plants in the rainforest are trees though. While they are the easiest to observe, there is a great diversity of epiphytes, plants that live on other plants, that make the rainforest their home. Plants like orchids live on rainforest trees high in the ...
The future of tropical biodiversity depends on how human-modified landscapes are managed, but keeping track of how species respond to management is challenging. Remote automated technologies offer opportunities to sample biodiversity rapidly, but are only now being trialled in tropical environments where ecological data is often lacking.. Tropical bats are diverse, filling numerous ecological niches and providing ecosystem services such as pest control, pollination and seed dispersal. Logging exerts subtle changes on bat assemblages and in fragmented habitats local extinctions and diversity declines are reported. Despite these impacts, surprisingly little is known about bat responses to land-use change, largely because they are poorly surveyed compared to larger, charismatic vertebrates. Inventories rely on cumbersome live-trapping, which can be limited to accessible areas, and prone to problems in detectability in converted habitats. Thus, it is difficult to ascertain whether anecdotal declines ...
Global conservation targets should not be met at the cost of the worlds poor. The first study to evaluate a policy aiming to compensate local people for the costs of conservation has revealed that, despite good intentions, the poor have lost out.. Tropical forests are important to all of us on the planet. As well as being home for rare and fascinating biodiversity (like the lemurs of Madagascar), tropical forests lock up enormous amounts of carbon helping to stabilise our climate. However tropical forests are also home to many hundreds of thousands of people whose lives can be affected by international conservation policies.. Multilateral donors such as the World Bank have made clear commitments that those negatively impacted by their projects should be compensated. This includes those affected by conservation projects such as those intended to slow climate change by preventing tropical deforestation (a scheme known as REDD+ or Reducing Emissions from Deforestation and Forest Degradation). ...
The effects of historical land use on tropical forest must be examined to understand present forest characteristics and to plan conservation strategies. We compared the effects of past land use, topography, soil type, and other environmental variables on tree species composition in a subtropical wet forest in the Luquillo Mountains, Puerto Rico. The study involved stems , 10 cm diameter measured at 130 cm above the ground, within the 16-ha Luquillo Forest Dynamics Plot (LFDP), and represents the forest at the time Hurricane Hugo struck in 1989. Topography in the plot is rugged, and soils are variable. Historical documents and local residents described past land uses such as clear-felling and selective logging followed by farming, fruit and coffee production, and timber stand improvement in the forest area that now includes the LFDP. These uses ceased 40-60 yr before the study, but their impacts could be differentiated by percent canopy cover seen in aerial photographs from 1936. Using these ...
Forests are often subject to multiple, compounded disturbances, representing both natural and human-induced processes. Predicting forest dynamics requires that we consider how these disturbances interact to affect species demography. Here we present results of an individual-based, spatially explicit forest simulator that we developed to analyze the compounded effects of hurricane disturbance and land use legacies on the dynamics of a subtropical forest. We used data from the 16-ha Luquillo Forest Dynamics Plot in Puerto Rico, together with a reconstruction of historical wind damage, to parameterize the simulator. We used the model to ask two questions. (1) What are the implications of variation in hurricane frequency and severity for the long-term dynamics of forest composition, diversity, and structure? Both storm severity and frequency had striking effects on forest dynamics, composition, and structure. The periodicity of disturbance also played an important role, with periods of high ...
Amazing pictures of 8 Pictures Of Tropical Rainforest Pictures Of Plants is totally great for your biological science knowledge. The image Resolution 800 x 1066 px and the image size only 131 kb. Click the thumbnail to see the larger version.. Tagged with: flowers of tropical rainforest, plants in tropical forest, tropical rainforest pictures of plants, tropical rainforest plant, tropical rainforest plant species, .. ...
Its not just that tropical forests are being rapidly destroyed but ... Its astonishing how insidious many of the threats are said Peres. ...The editors define four categories of emerging threats to tropical for... Many of the emerging threats to tropical forests become apparent only... We immediately notice when forests burn or trees come crashing down ...,The,subtleties,of,tropical,forest,demise,biological,biology news articles,biology news today,latest biology news,current biology news,biology newsletters
From an earlier post, relevant here:. This is arguably the most important topic to get red-pilled on, as our bad diet is the foundation upon which the (((medical mafia))) rests. To be blunt: Humans are eating the wrong diet for our species, and it is causing a wide range of bad side-effects. This is counter to many, if not most, academic teachings. But luckily, we can reason through this pretty simply.. Look at your body. Very little hair. You wouldnt survive the night, let alone the winter, in most parts of the world before the advent of fire and tools. We were designed, by evolution, for the tropics. Our bodies evolved for millions of years to be suited to that environment. Humans are a tropical species, and our diet should reflect that. In a tropical environment with no fire, no tools, what would you eat? Raw chickens? Grass? The milk of a grazing species? No! Wed eat fruit! Its just lying there on the ground or hanging from the trees! Just like most primates.. In short, modern humans ...
Scaricare Pollution and Fish Health in Tropical Ecosystems Epub pdf, Ognuno può cercare 400k epub pdf ebook e scegliere il miglior ebook da leggere con la tua famiglia, basta registrarsi e godere gratuitamente , Dynamic spot
Geckos are remarkable little creatures, clinging to almost any dry surface, and Alyssa Stark, from the University of Akron, USA, explains that they appear to be equally happy scampering through tropical rainforest canopies as they are in urban settings. A lot of work is done on geckos that looks at the very small adhesive structures on their toes to really understand how the system works at the most basic level, says Stark. She adds that the animals grip surfaces with microscopic hairs on the soles of their feet that make close enough contact to be attracted to the surface by the minute van der Waals forces between atoms. However, she and her colleagues Timothy Sullivan and Peter Niewiarowski were curious about how the lizards cope on surfaces in their natural habitat.. Explaining that previous studies had focused on the reptiles clinging to artificial dry surfaces, Stark says We know they are in tropical environments that probably have a lot of rain and its not like the geckos fall out of ...
Aceptado: 07 febrero 2012. Abstract. Indigenous knowledge and the millenary experience in management of natural vegetation on karstic landscapes are important aspects that should be considered in animal production in seasonal tropical environments. The aim of the present work was to make an inventory of native plants associated to soilscapes from seasonal tropical forests from the Yucatán Peninsula that are used as forage by Mayan people. The work was carried out in 27 Mayan communities on karst landscapes in the Yucatán Peninsula as a part of the Ethnoflora Yucatanense project of the Universidad Autónoma de Yucatán. Samples were taken of forage plants together with corresponding floristic and ethnobotanical information. Data were processed in EXCEL dynamic tables, grouped by plant family, geoforms and soils, life form and animal consumers. Results indicate that Mayan communities use 196 plant species as forage: 139 herbaceous, 17 shrubs, 35 trees and 2 palms. These plants are fed to cows, ...
1) The Amazon River. Amazon River is the worlds longest river. Its also the largest by volume. It has over 3000 species of fish. 60% of the Amazon Rainforest is in this country. This rain forest represents over half of the worlds remaining tropical rain forests. You should also know its the largest and most diverse of tropical rain forests. This scenery will provide you with fantastic aerial views that you can shoot with your drone.. 2) Pantanal Swamp. If you are a fun of wildlife, Pantanal swamp is another place you should visit in Brasil. It is home to plenty of wildlife, for example, it hosts the worlds largest Jaguar population. This vast wetland blessed with natural beauty is one place you can carry out incredible aerial video shooting.. 3) Salvador Beaches. Salvador is one place that you should not fail visit. Thats because of its vibrant music scenes and fantastic beaches that originate from calm inlets. You will enjoy swimming, sailing, and diving. If you enjoy surfing, its open ...
At the global scale, species diversity is known to strongly increase towards the equator for most taxa. According to theory, a higher resource specificity of consumers facilitates the coexistence of a larger number of species and has been suggested as an explanation for the latitudinal diversity
INTRODUCTION. Phosphorus (P) is one of the most limiting nutrients for the productivity of the majority of crops grown on the highly weathered soils of tropical environments (Novais & Smyth, 1999). Particularly, in soils under forest cover and pasture, organic forms of P (Po) may represent 15 to 37 % of total extracted P, and 41 to 87 % of the total labile P is in organic form (Cunha et al., 2007). Under these conditions, Po becomes a major source of P to plants through decomposition and mineralization of the labile Po fraction, which is easily mineralized, thereby contributing to the availability of P to plants (Gatiboni, 2003; George et al., 2006).. Soil Po is derived from microorganism, plant or animal residues and can be recycled by the microbial biomass or stabilized in the mineral phase of the soil (Ohel et al., 2004). As proposed by McGill & Cole (1981), mineralization can be divided into two processes: 1) biochemical mineralization in which inorganic phosphorus (Pi) is released from ...
Protected tropical forest biodiversity under threat. A new study shows that biodiversity levels in tropical forests are still declining despite having protected area status.
The Revista Chapingo Serie Ciencias Forestales y del Ambiente (RCHSCFA) is a scientific journal that aims to raise awareness of high-quality research products related to forest, arid, temperate and tropical environments in the world. Since its foundation in 1994, the RCHSCFA has served as a space for scientific dissemination and discussion at a national and international level among academics, researchers, undergraduate and graduate students, forest managers and public/private entities that are interested in the forest environment
The Revista Chapingo Serie Ciencias Forestales y del Ambiente (RCHSCFA) is a scientific journal that aims to raise awareness of high-quality research products related to forest, arid, temperate and tropical environments in the world. Since its foundation in 1994, the RCHSCFA has served as a space for scientific dissemination and discussion at a national and international level among academics, researchers, undergraduate and graduate students, forest managers and public/private entities that are interested in the forest environment
Prerequisites: BIOL 3329, and one of BIOL 3308, PSYC 2350 or MATH 1216 and application to the Department.. This course provides students with an opportunity to study is be a field trip to a tropical location where students are able to immerse themselves in a tropical environment. Prior to departure students present and attend seminars on subjects pertinent to the ecology of the tropical field site to be visited. Students design a research project on some aspect of tropical ecology prior to departure to the tropical site, collect data for the project while in the tropics and write a report on the research upon return to Saint Marys University. Note: Students are responsible for travel and living costs associated with the course, as well as tuition. Enrolment is limited and admission is by application to the Biology Department. Contact the Biology Chairperson for details. This course occurs over a period of 10-12 days and nights at an off-campus location. ...
Thus on the basis of existing evidence, Eastern Europe now reveals the same pattern as Western Europe with respect to the transition from Neanderthals to modern humans. Modern humans appear to represent an intrusive population with clear affinities to earlier Homo sapiens in Africa and the Near East that replaced the local Neanderthal population.. Among the morphological contrasts between the Eastern European modern humans and their Neanderthal predecessors, the evidence for climatic adaptation in the postcranial skeleton is particularly striking. The high brachial and crural indices for the modern humans from Kostenki and Sungir are consistent with a patter of adaptation to temperate and tropical environments among modern population.. following the prediction of Allens rule concerning the length of extremities. The overall shape and size of the body of the adult male from Kotenski XIV (small and thin) seems to conform to both Bergmanns and Allenss rules for warm climate adaptations ...
Studies on urban space especially within the context of urban tropical environments took a new dimension in the wake of the United Nations Conference on the Environment and Development held in Rio in 1992. Geographical or related studies, which have treated this notion in the African context, have generally stuck to the existence of myriad problems perceived as constraints to city life such as difficulties related to housing, insufficient supply of potable water, poor drainage and waste disposal, urban transport difficulty, and all types of pollutions.. However, to limit urban space in Africa only to these problems does not seem to constitute a firm scientific research objective, because this urban space is a social structure that, in its functioning, influences the life of the city dweller. For the reason that sufficient attention has been centered on the functioning of these tropical cities as living organisms where human beings subsist in interdependence with one another, we therefore, in ...
Final year student Ethan Wong is studying for a Bachelor of Science majoring in Tropical Environment Biology and Microbiology at Monash University, Malaysia campus. He has previously been on exchange to Singapore and is currently on exchange at Warwick with Global Sustainable Development for the 2019/20 spring term.. ...
The Association for Tropical Biology (ATB) was founded in 1963 to promote research and to foster the exchange of ideas among biologists working in tropical environments. The ATB has built its reputation on the publication of a high-quality, widely-cited journal, BIOTROPICA, and on the sponsorship of international symposia on diverse tropical issues. It also co-publishes an international newsletter, with news for tropical biologists ...
Swim Assessment. Goldfish Swim School believes in the Science of SwimPlay: Kids grow and learn against the backdrop of our tropical environment and shiver-free pools!
Final year student Ethan is studying for a Bachelor of Science majoring in Tropical Environment Biology and Microbiology at Monash University.. ...
It appears to be in the tropics and subtropics where poor quality forage intake by cattle is low without supplementation and where significant responses in feed intake occurs when a non-protein nitrogen deficiency is corrected and extra protein that escapes rumen fermentation is provided in the diet. It is strongly stressed that supplementation with urea and proteinmeals increases voluntary intake of poor quality forages by cattle under tropical conditions to approximately the same level of intake as unsupplemented cattle under temperate conditions (Leng, 1989b). In this situation the supplement is only correcting a depressed intake back to normal intake ...
The region has a tropical climate and depends on monsoons for rainfall. According to the Köppen climate classification, it has a non-arid climate with minimum mean temperatures of 18 °C (64 °F).[35] The most humid is the tropical monsoon climate characterised by moderate to high year-round temperatures and seasonal heavy rainfall above 2,000 mm (79 in) per year. The tropical climate is experienced in a strip of south-western lowlands abutting the Malabar Coast, the Western Ghats and the islands of Lakshadweep and Andaman and Nicobar are also subject to this climate.[36] The tropical wet and dry climate, drier than areas with a tropical monsoon climate, prevails over most of the inland peninsular region except for a semi-arid rain shadow east of the Western Ghats. Winter and early summer are long and dry periods with temperatures averaging above 18 °C (64 °F), summer is exceedingly hot with temperatures in low-lying areas exceeding 50 °C (122 °F), and the rainy season lasts from June to ...
Basella alba / rubra is perennial vine that likes tropical conditions, but is also cultivated as an annual crop in temperate regions. It can climb up or spread horizontaly up to 10m and is fairly fast growing as long as temperatures are high. Even though it is climbing/crawling in nature, Basellas young stems are not to flexible and can become quite hard, so it can be shaped into a small bush. It is heat loving plant that can be hurt by temperatures lower than 5C, and instantly killed with less than 0C. Its succulent flesh helps it to easily survive severe and long drought with its water storage. It also tolerates heavy rains and high humidity. It likes full sun, but when planted in partial shade its growth is faster and leaves are more juicy. Malabar Spinach grows best in fertile, acidic soils but tolerates even poor, sandy soils. It tiny flowers appear usually in dry seasons followed by black berries. It can be easily propagated from cuttings and seeds, which for faster germination it is ...
Similar view August 1956 . . . . . . . . .. . . . . . . . . . Kibo summit viewed from Moshi February 1928 . . . . . . Kibo summit viewed from Moshi January 1975 . . . . . . . The summit of Mount Kilimanjaro from Mawenzi showing extent of glaciation in September 1935 . . . . . . . . . . . . The summit of Mount Kilimanjaro August 1956 . . . . . . Similar view taken by air by with peaks of Mawenzi in foreground March 1973 . Changes in the nature and amount of predation, competition, herbivory, migration, emigration, and immigration, are all important and will lead to changes in community composition, but changes in the hydrological cycle or in the interactive processes of the mineral cycle potentially have more profound effects on the structure of the system (Walker 1989). Worthington (1938) pointed out it was an error to suppose the tropical conditions of Africa implied the existence of an exuberant vegetation and rich soil. Distribution of elephant deaths in 1971 drought, Tsavo East National ...
Cenozoic strike-slip tectonism, which caused local crustal extension in South-east Asia, generated many short-lived but deeply subsiding basins. Under tropical conditions and assisted by intensive karstic weathering, the basins formed ideal sites for lakes during early basinal history in Oligocene to Miocene times. In several basins in northern Thailand, a shallow-lacustrine assemblage of mudstone and coal contains thin, alginite-rich oil shales of moderate grade which formed under oxic or anoxic conditions during the initial flooding of the lake, which was accompanied by high organic productivity. In the Mae Sot Basin, a carbonate-rich lacustrine assemblage contains thick, alginite-rich oil shales of high grade which formed under anoxic conditions in deeper, probably stratified lakes where the organic material was well preserved. The kerogen in both assemblages is Type I, hydrogen-rich. Under conditions of rapid sedimentation and abnormally high heat flow associated with active tectonism, the ...
Sao Paulo - Brazils trade with Africa could triple to $60 billion (R490.7 billion at current exchange rate) by 2017, according to business leaders here who also highlighted the South American behemoths potential as a development model for the continent.. I believe that trade could reach $60 billion in six years, said Roberto Giannetti da Fonseca, head of foreign trade at the Sao Paulo Industrial Federation (FIESP), who noted that trade already tripled to $20 billion between 2004 to last year.. He made his remarks at a conference on the private sectors role in African development that brought together local entrepreneurs, diplomats, Brazilian government officials, economists and representatives from multilateral organisations.. Da Fonseca saw great prospects for boosting Brazilian exports to the African continent, particularly farm machinery which - unlike agricultural equipment from Europe or the United States - is particularly suited to Africas tropical conditions. ...
Hi, my Tiki 26 nr. 454 is near completion in South Africa. When I am inside one of the hulls the temperature is really very high. The mainhatch alone does not provide enough ventilation. Now I am in doubt where and what I can do best when I go coastal. cruising and sleeping in near tropical conditions of Mozambique and Madagascar. Sunproof, rainproof, waveproof? Where should
2017 Appeal ** Help PFAF to go Tropical! Our big project for 2017 is to extend our database by adding a further 500 selected useful plants that grow in tropical conditions. This is a major project for us and we need your donations to complete it. Read more >> ...
2017 Appeal ** Help PFAF to go Tropical! Our big project for 2017 is to extend our database by adding a further 500 selected useful plants that grow in tropical conditions. This is a major project for us and we need your donations to complete it. Read more >> ...
2017 Appeal ** Help PFAF to go Tropical! Our big project for 2017 is to extend our database by adding a further 500 selected useful plants that grow in tropical conditions. This is a major project for us and we need your donations to complete it. Read more >> ...
2017 Appeal ** Help PFAF to go Tropical! Our big project for 2017 is to extend our database by adding a further 500 selected useful plants that grow in tropical conditions. This is a major project for us and we need your donations to complete it. Read more >> ...
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 ...
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 ...
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 ...
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 ...
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 ...
tropical rainforest: Luxuriant forest, generally composed of broad-leaved trees and found in wet tropical uplands and lowlands around the Equator. Rainforests are vegetation types dominated by broad-leaved...
Trees in the Amazon tropical forests are old. Really old in fact whi...Using radiocarbon dating methods the team which includes UC Irvines... Little was known about the age of tropical trees because they do not...And for Trumbore who studies how forests and the atmosphere exchange ...Because their trees are old and slow-growing the Amazon forests whic...,Amazon,trees,much,older,than,assumed,,raising,questions,on,global,climate,impact,of,region,biological,biology news articles,biology news today,latest biology news,current biology news,biology newsletters
Assigning seasonal status to birds is not always straightforward. Many species are polytypic, with both discrete resident and migrant subspecies or populations occurring in the country, and it is not always clear which taxon or population occurs in the park Hq area or on MFDP. Only 114 of 169 MFDP-recorded species (67.5%) are considered residents and for only approximately half of these are there confirmed breeding records on MFDP. Most of the remainder are non-breeding winter visitors. A number of species that are widespread in forest habitats elsewhere in the country (Large Hawk-cuckoo Hierococcyx sparverioides, Black-winged Cuckooshrike Coracina melaschistos, Ashy Drongo Dicrurus leucophaeus, Lesser Racket-tailed Drongo D. remifer, Hair-crested Drongo D. hottentottus, Verditer Flycatcher Eumyias thalassinus and Grey-headed Flycatcher Culicicapa ceylonensis) are only known on the plot and in the Hq area of Khao Yai as non-breeding visitors. Hair-crested Drongos breed in lower elevation, ...
Monitoring is a fundamental component of the management of threatened species and is of particular importance when those species come into direct conflict with humans and their interests. In such circumstances up-to-date information on population status, trends and distribution become key inputs into decision making. In these circumstances, systematic, objective and transparent data is critical to the acceptance of the decision making process.. In the Wet Tropics, two species are the focus of repeated demands for management, made to all levels of government, and are frequently the focus of bitter debates, often with financial and legal implications: the endangered southern cassowary (Casuarisus casuarius) and the vulnerable spectacled flying-fox (Pteropus conspicillatus). For both species questions relating to population sizes, trends and distribution are central to decision making and conflict resolution processes.. Project objectives at a glance. ...