The ant Cataglyphis lives in the Sahara desert and is one of the most thermotolerant land animals known. It forages at body temperatures above 50 degrees C, and the critical thermal maxima are at 53.6 +/- 0.8 degrees C for Cataglyphis bombycina and 55.1 +/- 1.1 degrees C for Cataglyphis bicolor. The synthesis and accumulation of heat shock proteins (HSPs) were analyzed in Cataglyphis and compared to Formica, an ant living in more moderate climates, and to two Drosophila species. In Cataglyphis, protein synthesis continues at temperatures up to 45 degrees C as compared to 39 degrees C for Formica and Drosophila. The two Drosophila species, Drosophila melanogaster and Drosophila ambigua, differ with respect to their maximal induction of HSP synthesis and accumulation by 3-4 degrees C. In contrast, the two ant species accumulate HSPs prior to their exposure to heat, and in Cataglyphis the temperature of maximal HSP induction by de novo protein synthesis is only 2 degrees C higher than in Formica. ...

Looking for Sahara Desert? Find out information about Sahara Desert. worlds largest desert, c.3,500,000 sq mi , N Africa; the western part of a great arid zone that continues into SW Asia. Extending more than 3,000 mi , from... Explanation of Sahara Desert

1. Using the patch-clamp technique, Ca2+ channel currents were recorded from neurones freshly isolated from the thoracic ganglia of the desert locust Schistocerca gregaria. 2. In solutions containing 10 mmol l-1 Ba2+ we observed high-voltage-activated whole-cell inward currents with sustained and transient components, both of which had similar steady-state inactivation properties. 3. Substitution of Ca2+ for Ba2+ was found to reduce whole-cell currents, whereas removal of monovalent cations had no effect. 4. Cd2+ (1 mmol l-1) completely blocked the whole-cell current, but at 10 micromolar preferentially inhibited the sustained component without affecting the transient component. 5. Verapamil (1 micromolar) inhibited both current components but appeared to be more selective for the sustained component, whereas nitrendipine (1 micromolar) had no effect on either component. 6. A single-channel recording suggested that the transient component was carried by a low- conductance channel. 7. Certain ...

Tactile stimuli provide a potent drive for behavioural phase transition in locusts, but their efficacy differs depending on the site that is stimulated. The most effective location is the anterior (outward-facing) surface of a hind femur (Simpson et al., 2001). We show that mechanical stimuli directed to most regions on this surface in free-moving solitarious locusts can elicit full behavioural gregarization.. Stimulation of half of the femoral surface is more effective at inducing gregarization than stimulating just one quarter. This suggests that in order to elicit gregarization reliably there may be a minimum area over which stimulation must occur but that there is no specific region on a femur that must be touched. The only ineffective site is the ventral distal region, which has few tactile hairs.. A striking finding of this study is that solitarious phase locusts have, on average, 30% more tactile hairs on their hind femora than do gregarious locusts. By contrast, solitarious locusts have ...

SANTIAGO - Beautiful plants grew in the Atacama Desert - the driest place on Earth - following unexpectedly heavy rainfall in the north of the country during the winter months.. VIDEO: Chile builds South Americas first solar thermal power plant in Atacama Desert. The desierto florido (flowering desert) phenomenon usually occurs every five to seven years when rains cause buried seeds to germinate and flower. But the latest bloom comes just two years after a particularly colorful flowering in 2015.. Chile begins construction on worlds largest telescope in Atacama desert. ...

We translocated 120 Agassizs desert tortoises to 5 sites in Nevada and Utah to evaluate the effects of translocation on tortoise survivorship, reproduction, and habitat use. Translocation sites included several elevations, and extended to sites with vegetation assemblages not typically associated with desert tortoises in order to explore the possibility of moving animals to upper elevation areas. We measured survivorship, reproduction, and movements of translocated and resident animals at each site. Survivorship was not significantly different between translocated and resident animals within and among sites, and survivorship was greater overall during non-drought years. The number of eggs produced by tortoises was similar for translocated and resident females, but differed among sites. Animals translocated to atypical habitat generally moved until they reached vegetation communities more typical of desert tortoise habitat. Even within typical tortoise habitat, tortoises tended to move greater ...

Using autocorrelation analysis and autoregressive integrated moving average (ARIMA)modelling, we analysed a time series of the monthly number of 1° grid squares infested with desert locust Schistocerca gregaria swarms throughout the geographical range of the species from 1930-1987. Statistically significant first- and higher-order autocorrelations were found in the series. Although endogenous components captured much of the variance, adding rainfall data improved endogenous ARIMA models and resulted in more realistic forecasts. Using a square-root transformation for the locust data improved the fit. The models were only partially successful when accounting for the dramatic changes in abundance which may occur during locust upsurges and declines, in some cases successfully predicting these phenomena but underestimating their severity. Better fitting models were also produced when rainfall data were added to models of an equivalent series for desert locust hoppers (nymphs) that incorporated ...

The hand of Atacama Desert, In the middle of the Atacama Desert, a giant hand rises from the ground like the remains of an ancient civilisation. In reality, its a pretty modern sculpture-an art piece called Mano del Desierto-created by Chilean a

Zachary Law Group can answer your legal questions regarding family and divorce law in Desert Sands MH Park Arizona Family law in Desert Sands MH Park Arizona. A Desert Sands MH Park Arizona family law attorney plays an important role for individuals contemplating, and working to achieve delicate, sometimes unwelcomed changes in their familys state […]

If your planning an Atacama Desert Adventure, you should plan on spending between 3 to 6 days. Check out our sample Atacama Desert Itinerary.

Early morning temperatures dipped into the mid-30s in the Arizona/California desert region, causing sporadic lettuce ice to develop in some fields. Harvesting operations will be delayed 1-2 hours or until crops have thawed sufficiently.. Widespread lettuce ice is forecast for Saturday, December 9 and again on December 20-21. Apart from causing minor dehydration in lettuce crops, plant maturity will be slowed down due to cooler ground temperatures.. Markon inspectors will be monitoring commodity and value-added supplies closely and will update further as needed.. ...

The Gobi Desert. The Gobi is the worlds second largest desert, with an area of 650,000 square miles (1.6 million square kilometers), about midway in size between Alaska and Mexico (the larger). The Gobi is in the rain shadow of the Tibetan Plateau and is a cold desert, with low temperatures in the winter. In contrast with the Sahara Desert, the worlds largest, the Gobi is largely a gray/black gravel rather than sand. (Images 22, 28, 30, 33-36, 38-39 and 42-47). The route across the Gobi Desert follows the Silk Road, with its oases. As a result, there are a number of small verdant sections of greenery and agriculture, generally near the urban areas that developed at the old oases.. The Train Trip. The Lanzhou to Urumqi route starts in the narrow Yellow River Valley and after climbing onto the Tibetan Plateau, reaches Xining, capital of Qinghai, and terminus of the relatively new passenger rail route to Tibet. After descending from the Qilian mountains, the route is largely in the Gobi Desert ...

According to the Nuclear Engineering International Industry Handbook, the Negev Phosphates Chemicals Company extracts uranium from phosphate ores at a plant adjacent to the Negev Nuclear Research Center. [1] In 1991, the company merged with Rotem Fertilizers Ltd. and Amfert B.V. to become Rotem Amfert Negev Ltd. The company mines phosphates at three sites in the Negev Desert: Arad, Zin, and Oron. [2] The three mines combined annual yield is approximately 5.5 million tons of phosphate ore. [3]. The Negev Desert holds between 30,000 and 60,000 tons of uranium contained within low-level phosphate ores. [4] In 1949 Science Corps C, a special unit of the Israel Defense Forces Science Corps began a two-year geological survey of the Negev desert in search of uranium. Science Corps C perfected a process for extracting uranium from phosphate deposits by 1953. [5] Despite this, domestic production amounts to only 10 tons per year, making the import of natural uranium necessary to sustaining the nuclear ...

The Arabian Peninsula is a key region for understanding hominin dispersals and the effect of climate change on prehistoric demography, although little information on these topics is presently available owing to the poor preservation of archaeological sites in this desert environment. Here, we describe the discovery of three stratified and buried archaeological sites in the Nefud Desert, which includes the oldest dated occupation for the region. The stone tool assemblages are identified as a Middle Palaeolithic industry that includes Levallois manufacturing methods and the production of tools on flakes. Hominin occupations correspond with humid periods, particularly Marine Isotope Stages 7 and 5 of the Late Pleistocene. The Middle Palaeolithic occupations were situated along the Jubbah palaeolake-shores, in a grassland setting with some trees. Populations procured different raw materials across the lake region to manufacture stone tools, using the implements to process plants and animals. To reach the

The Arabian Peninsula is a key region for understanding hominin dispersals and the effect of climate change on prehistoric demography, although little information on these topics is presently available owing to the poor preservation of archaeological sites in this desert environment. Here, we describe the discovery of three stratified and buried archaeological sites in the Nefud Desert, which includes the oldest dated occupation for the region. The stone tool assemblages are identified as a Middle Palaeolithic industry that includes Levallois manufacturing methods and the production of tools on flakes. Hominin occupations correspond with humid periods, particularly Marine Isotope Stages 7 and 5 of the Late Pleistocene. The Middle Palaeolithic occupations were situated along the Jubbah palaeolake-shores, in a grassland setting with some trees. Populations procured different raw materials across the lake region to manufacture stone tools, using the implements to process plants and animals. To ...

Taking its environmental responsibilities seriously and championing wildlife conservation across different corners of the planet, the Emirates Group is playing its part to support and preserve biodiversity.. The Dubai Desert Conservation Reserve and Emirates One&Only Wolgan Valley in Australia both illustrate the Groups long-standing focus on protecting fragile ecosystems and support for sustainable tourism in very different parts of the world. Both conservation reserves protect valuable ecosystems and at the same time provide unique and sustainable experiences for visitors from around the world.. The Dubai Desert Conservation Reserve The Emirates Group funds the operations of the 225 square kilometre Dubai Desert Conservation Reserve (DDCR), an inland desert habitat that has been protected by government mandate since 2003. This is the largest piece of land that Dubai has dedicated to a single project and aims to preserve Dubais unique desert environment for future generations. The DDCR plays ...

TY - JOUR. T1 - Description of Pseudomonas asuensis sp. nov. from biological soil crusts in the Colorado plateau, United States of America. AU - Reddy, Gundlapally Sathyanarayana. AU - Garcia-Pichel, Ferran. PY - 2015/1/17. Y1 - 2015/1/17. N2 - A Gram-negative, aerobic, non spore-forming, non-motile, rod-shaped, yellow pigmented bacterium CP155-2T was isolated from a biological soil crusts sample collected in the Colorado plateau, USA and subjected to polyphasic taxonomic characterization. Strain CP155-2T contained summed feature 3 (C16:1ω5c/C16:1ω7c) and C18:1ω7c as major fatty acids and diphosphatidylglycerol (DPG) along with phosphatidylethanolamine (PE) and phosphatidylglycerol (PG) as major polar lipids. Based on these characteristics CP155-2T was assigned to the genus Pseudomonas. Phylogenetic analysis based on 16S rRNA gene sequence further confirmed the affiliation of CP155-2T to the genus Pseudomonas and showed a 16S rRNA gene sequence similarity of less than 98.7% with already ...

Introduction. Desert, term applied to regions on the earth that are characterised by less than about 250mm of annual rainfall, and, in many cases an evaporation rate that exceeds precipitation, and a high average temperature. Because of the lack of moisture in the soil and the low humidity in the atmosphere, most of the sunlight penetrates to the ground. Daytime temperatures have reached 57.8 Degrees Celsius on the 13th of September 1922, this was the highest ever recorded in Libya. On the other hand at night the temperature can drop to near freezing. Deserts are found in ever continent throughout the globe from Africa to the cold plains of Northern China. Hot deserts extend all around the world in two belts, to the north and south of the tropical zone around the worlds equator. Further from the equator, north and south are the cold deserts, and even further are the ice-covered polar deserts. Some deserts receive almost no rainfall, for example in southern Egypt, there are many years when ...

The name translated from MSA (modern standard arabic) literally means gold which is how you might look after tanning by this relaxing city on the Sinai Peninsula. Oil currently accounts for 90 percent of the countrys export earnings and makes up about 40 percent of its GDP. But now for the first time, Saudi Arabia has opened the site to tourists. It is the largest desert area on the continentâ covering an area of about 900,000 square milesâ and the second largest on Earth, â ¦ The Report. to p. 198. A mere collection of huts dotted the expansive desert sands. There are few experiences that are as â Dubaiâ as the desert safari. Growing Cities in the Arabian Desert. Riyadh, Saudi Arabia. Natural water pipes were built around the tombs to protect their facades from erosion, which have kept them well preserved thousands of years after their construction. Astinah. Tours are given in Arabic and English. Deserts of the World The Sahara Desert: Geology and Climate - One of the most storied and ...

How do desert plants survive baking heat and constant drought? With the help of cryptobiotic friends!. Cryptobiotic? It sounds like something out of a graveyard horror movie. Actually, the word means hidden life (from the Greek words kruptos and biotikos). Invisible to the casual observer, dense mats of cryptobiotic organisms, including cyanobacteria, lichens, mosses, green algae, and microfungi, mix with sand and clay to form a life-sustaining soil in desert regions. Without it, a lot of desert plants wouldnt survive.. Imagine yourself as a desert plant exposed to constant heat that threatens to bake you dry and wind that blows sand out from under your roots. You would have a hard time making it. Desert heat and sand are not hospitable to vegetation that needs stable, moist soil for root growth. But weave together a combination of tiny organisms, sand, and clay, and you get a mat of living soil that resists erosion and holds on to water like a sponge-enough to make a difference to a lot of ...

The desert locust upsurge could have devastating consequences in already vulnerable regions, potentially causing large-scale crop damage and threatening food security in countries affected by recurrent drought, conflict, high food prices, as well as the impacts of the COVID-19 pandemic. The Horn of Africa is facing the worst desert locust crisis in over 25 years, and the most serious in 70 years for Kenya. The current situation - is set to become a regional plague, as several regions are now being affected simultaneously - which represents an unprecedented threat to food security and livelihoods in the region and could lead to further suffering, displacement and potential conflict. Desert locust swarms formed in the spring-breeding areas of Southwest Asia and are moving across India, Pakistan and the Islamic Republic of Iran. In India, swarms that arrived in Rajasthan in May continued to move and have reached several central states in country - this has not occurred since 1961. The situation ...

While the Southwestern United States is generally regarded as having the lowest levels of humidity, Denver holds it own. With annual humidity usually quoted at approximately 50%, Denvers mild climate and natural scenery makes it a very livable city. Although situated very close to the snow and skiing of the Rocky Mountains, its year-round climate is quite mild, and Denver is known for having sunshine nearly every day of the year. For those who do not like the idea of a desert environment, Denver is a low-humidity, high-altitude alternative. ...

Video from the area also revealed holes in water tanks, a smashed tortoise burrow, as well as destroyed fences and water lines.. They had total control of this land for one week, and look at the destruction they did in one week, Corey Houston, family friend of Cliven Bundy, told Fox News last week. Nowhere in the court order that I saw does it say that they can destroy infrastructure, destroy corrals, tanks … desert environment, shoot cattle.. Separate images taken from an airplane also uncovered hundreds of cattle stuffed into small pens on a BLM compound, prompting the FAA to order a no-fly zone over the area.. Despite a clear and violent overreach by the BLM, Nevada Senator Harry Reid has responded to the incident by calling Bundy and his supporters domestic terrorists.. There were hundreds, hundreds of people from around the country that came there, Reid said at an event in Las Vegas. They had sniper rifles in the freeway. They had weapons, automatic weapons. They had children ...

Most teas-even Fair Trade-come from plantations where workers have little say, and are often trapped in a system of dependency. Together, we are building a different tea model, one that gives small farmers greater access to the market, affording them more economic power, better lives and healthier communities.. Chamomile has been used in herbal medicine for centuries. Our chamomile comes from SEKEM, a leader in sustainable agriculture and community development for more than 40 years. SEKEM is located to the northeast of Cairo, Egypt, and has achieved incredible economic and community prosperity despite the inhospitable desert environment that surrounds them.. Calming chamomile soothes the mind and quiets the spirit. Find your inner peace. ...

An anonymous reader writes Getting access to enough water to drink in a desert environment is a pretty tough proposition, but Eole Water may have solved the problem. It has created a wind turbine that can extract up to 1,000 liters of water per day from the air. All it requires is a 15mph wind to g...

The flood is less in conflict with evolutionary thought, more with geology. Since geologists can look at layers of the earth, the thought is that a global flood would show a layer of silt or sandstone (probably wrong terminology since I only took one geo class in college). Geologists can see localized floods in the strata, and also ash layers from volcanos, or compacted sand from desert environments, but theres no similar aged flood layer from all parts of the earth. Also seashells on mountains are explained by mountains being pushed up by plates moving. So question, if people that believe in the whole earth flood dont believe in plate tectonics or modern geological theories, what are earthquakes? Scientific theory explains the ones we have here as one plate subducting under another, basically melting under the plate that has most of the US on it. Im curious what the alternate theory is. Thanks ...

A virtually unlimited, self contained energy supply that requires very little room for storageOur equity affiliate, Sony Ericsson, is performing tremendously, with sales, profit and unit shipments reaching record levels (This is a theme we will keep revisiting You can change the country of sale on ITA Matrix Airfare Search and who thus oozes more personality than all of the modern bald space marine characters combined michael kors handbags replica They even noted that the experiment would have michael kors cheap finished quicker if it had been done in a desert environment And thats why Epcot has a reputation as the drunk park5Christiansen got into toysThey threatened terrified staff and customers who feared they were victims of an Islamic terror attack One of the main focuses of my classes (and my own yoga practice) isjoyThis follows a NHTSA investigation into six reports of airbag inflator ruptures that occurred in other vehicles, all of which happened in Florida and Puerto Rico Heres a ...

oxygen park is a unique public space in doha designed by AECOM for wellbeing in a desert environment, providing a space in which to exercise, rest, and play

Chile's Atacama Desert, known as the driest place in the world, is also the ideal spot for some of the world's best telescopes, and can be seen here in these images.

Our member horticultural expert is Hank Jorgensen. For more information on this plant species, see Hanks page on Cheilanthes wrightii Hooker (opens in a new tab ...

Our member horticultural expert is Hank Jorgensen. For more information on this plant species, see Hanks page on Cenchrus palmeri S.Watson (opens in a new tab ...

The Global Policy Centre on Resilient Ecosystems and Desertification (GC-RED) originated from the United Nations Sudano Sahelian Office, established in 1973. The Centre, based in Nairobi, has been at the forefront of promoting sustainable development in drylands and supporting the implementation of the UN Convention to Combat Desertification. In 2014, the Centres mandate was expanded to embrace a broader agenda related to sustainable management of natural capital and resilience building in drylands and other fragile ecosystems. The GC-RED areas of work are related to the sustainable management of land, biodiversity and ecosystem services; building resilience capacities to drought and conflict; and mainstreaming poverty-environment objectives in national development frameworks.. ...

Study site: This research was conducted on the Sevilleta LTER, located 100 km south of Albuquerque, New Mexico, which is an ecotonal landscape of Chihuahuan desert shrub and grasslands (Muldavin et al. 2008). Data were collected from a 0.9 x 0.5km strip of land that encompassed a flat bajada and a shallow rocky canyon of mixed desert shrub and grassland dominated by the creosote bush (Larrea tridentata) and black grama grass (Bouteloua eriopoda). Tissue collection & sample preparation for stable isotope analysis:. From May to October of 2005 and 2006 we collected plant, lizard, and arthropod tissues for carbon stable isotope analysis. During mid-summer of 2005, we randomly collected leaf and stem samples from the 38 most abundant species of plants; these species produce over 90% of the annual biomass on our study site (see Appendix Table A). Approximately 3.5 mg of plant material was then loaded into pre-cleaned tin capsules for isotope analysis. All animal research was conducted with the ...

Gibson Desert, arid zone in the interior of Western Australia. The desert lies south of the Tropic of Capricorn between the Great Sandy Desert (north), the Great Victoria Desert (south), the Northern Territory border (east), and Lake Disappointment (west). The area now constitutes Gibson Desert

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P. 109 Desertification is the formation of deserts when land loses its productivity and becomes bare. The causes of desertification are mostly due to human actions such as overgrazing, oOvercultivation, and deforestation but there are some natural causes too. It is because it reduces the amount of arable land in the world.

Note: The research reported here appears in the September [2001] issue issue of the scientific journal Limnology and Oceanography. The paper was funded through a number of grants connected with the ECOHAB program. Other funding for this study included grants from the National Oceanic and Atmospheric Administration, the Office of Naval Research and the Environmental Protection Agency. The ECOHAB: Florida Mission is to better understand the factors involved in the occurrence and dispersal of Floridas predominant red tide algae, K. brevis, and to predict and manage harmful algal bloom events. ...

Every day, millions of microorganisms reach Spain from the Sahara Desert and the Sahel region -- by flying. Louis Pasteur demonstrated back in 1861 that germs can move through the air, but it was only recently discovered that bacteria, fungi and viruses can travel thousands of kilometers stuck onto dust particles. Satellite images show clouds that come close to the size of the Iberian Peninsula.

Find great deals on Camel driver in the Sahara desert, near Douz, Kebili, Tunisia Photographic Print by Godong at AllPosters.com, with free shipping on orders $23+, free returns, and our low price guarantee.

Size: 6 x 4 x 2.75 cm Weight: 71.7 grams Location: Western Sahara Desert, Africa This item is one of a kind and you will receive the EXACT piece(s) pictured. Macro photography is used to show detail but can make items appear larger than their actual size. Please refer to the size ranges and note whether they are in cen

DAKAR, Senegal (AP) - More than 80 African migrants have been rescued after being found in a remote stretch of the Sahara Desert where hundreds of others have died along the perilous journey in recent years, the International Organization for Migration said Tuesday. The 41 females from Nigeria, including twin 4-year-old girls, and 42 males […]

Sands like those in the Kalahari Desert of Botswana are full of cyanobacteria. These drought resistant bacteria can fix atmospheric carbon dioxide, and together they add significant quantities of organic matter to the nutrient deficient sands.. We know that globally there is a huge exchange of carbon between the atmosphere and the soil. As average global temperatures rise, scientists are concerned that bacteria will break down organic matter in soils more rapidly, releasing more carbon dioxide into the atmosphere, says Dr Thomas. However, there have been very few actual field studies of this carbon exchange through world soils and little information on how they respond to temperature and moisture changes. This is particularly true for deserts. Here the bacteria have to be able to cope with long periods without rain and extreme temperatures, so they lie dormant in the desert soil only springing to life when there is enough moisture.. The exchange or flux of carbon between the soils and the ...

Graduate Student Assistantship (M.Sc.): Ecology of Kit Foxes on White Sands National Monument, NM. Location: New Mexico State University and White Sands National Monument, New Mexico. Website: http://aces.nmsu.edu/academics/fws/. Salary: $22,619/year; Support will be for ~3 years (6 academic semesters and 2 summer semesters) and will include research assistant and teaching assistant support.. Description: The Department of Fish, Wildlife and Conservation Ecology at New Mexico State University is offering a graduate student assistantship to begin fall semester 2018 to explore the ecology of kit foxes (Vulpes macrotis) in the Chihuahuan Desert at White Sands National Monument. The project involves capturing, radio-collaring, and using remote cameras to estimate abundance, resource use, and to apply emerging statistical methods to non-invasive data. During the field season, housing is provided on site in the form of 28 ft. trailer. The successful applicant will be co-advised by Drs. Gary Roemer and ...

The Sheephole Valley Wilderness is a perfect representation of the basin and range topography typical in the Mojave Desert. The area consists of the northwest to southeast trending granitic boulder strewn Sheep Hole and Calumet Mountains. The Sheep Hole Mountains, the larger and steeper range, rises to an elevation of 4,613 feet, while the Calumets rise to 3,732 feet above sea level. Sheep Hole Valley nests between the two ranges. At the valleys lowest point, around 1,832 feet above sea level, there are two small dry lake beds. Sand dune formations can be found at the southwest end of the Sheep Hole range and northeastern portion of the Calumets. Dominant vegetation is typical of much of the Mojave Desert, consisting of creosote bush scrub that gradually changes into a mixed desert scrub at higher elevations. Around the dry lake beds, salt-tolerant plants such as pickleweed, inkweek, and saltbush are found. Borrego milkvetch occurs in the sand dunes and is listed by the California Native Plant ...

The original Smoke Creek Desert is shown on John Charles Frémonts map of the area during his 1843-44 expedition as a lake west of Mud Lake, which was an early name for the Black Rock Desert.[1] The Smoke Creek Desert appeared on maps as Mud Lake up through maps as late as the 1920s though by that time its name had been standardized as The Smoke Creek Desert. The other major name for the desert which has been shown on many maps starting in the early 1850s is Alkali Lake.[2] Helen S. Carlson states that the name Smoke Creek has been found on a map from 1854.[3] There is controversy as to the origin of the name Smoke Creek. Some believe it to be named after the Smoke Creek, a creek which lies along the Western edge of the basin and flows Eastward from near the California-Nevada border into the Smoke Creek basin. It was along this route that the Lassen and Nobels Trails were explored from the Honey Lake Valley (Susanville, California area) Eastward, eventually following along the Smoke ...

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The irrigated oases and agricultural schemes are good breeding areas for grasshoppers. They are less suitable for the Desert Locust which generally prefers natural vegetation in the desert. Nevertheless, they may play an important role in view of the scarcity of rainfall and the lack of natural vegetation by providing suitable shelter and favourable breeding conditions for any Desert Locust adults that arrive into the area. This is most likely to occur in the spring after exceptionally good breeding on the Red Sea coastal plains or in the autumn after heavy breeding in the summer breeding areas in the interior of Sudan. Migration into the Western Desert is likely to occur only when the prevailing northerly winds are interrupted for a day or two by easterly winds in the spring or by southerly or south-westerly winds in the autumn ...

Interdependencies of ecologic, hydrologic, and social systems challenge traditional approaches to natural resource management in semi-arid regions. As a complex social-ecological system, water demands in the Sonoran Desert from agricultural and urban users often conflicts with water needs for its ecologically-significant riparian corridors. To explore this system, we developed an agent-based model to simulate complex feedbacks between human decisions and environmental conditions in the Rio Sonora Watershed. Cognitive mapping in conjunction with stakeholder participation produced a Bayesian model of conditional probabilities of local human decision-making processes resulting to changes in water demand. Probabilities created in the Bayesian model were incorporated into the agent-based model, so that each agent had a unique probability to make a positive decision based on its perceived environment at each point in time and space. By using a Bayesian approach, uncertainty in the human decision-making

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TY - JOUR. T1 - Evidence of aqueous secondary organic aerosol formation from biogenic emissions in the North American Sonoran Desert. AU - Youn, Jong Sang. AU - Wang, Zhen. AU - Wonaschütz, Anna. AU - Arellano, Avelino F. AU - Betterton, Eric. AU - Sorooshian, Armin. PY - 2013/7/16. Y1 - 2013/7/16. N2 - This study examines the role of aqueous secondary organic aerosol formation in the North American Sonoran Desert as a result of intense solar radiation, enhanced moisture, and biogenic volatile organic compounds (BVOCs). The ratio of water-soluble organic carbon (WSOC) to organic carbon (OC) nearly doubles during the monsoon season relative to other seasons of the year. When normalized by mixing height, the WSOC enhancement during monsoon months relative to preceding dry months (May-June) exceeds that of sulfate by nearly a factor of 10. WSOC:OC and WSOC are most strongly correlated with moisture parameters, temperature, and concentrations of O3 and BVOCs. No positive relationship was identified ...

We characterized soil communities in the Mojave Desert across an elevation gradient. Our goal was to test the hypothesis that as soil quality improved with increasing elevation (due to increased productivity), the diversity of soil prokaryotes and nematodes would also increase. Soil organic matter and soil moisture content increased with elevation as predicted. Soil salinity did not correlate to elevation, but was highest at a mid-gradient, alluvial site. Soil nematode density, community trophic structure, and diversity did not show patterns related to elevation. Similar results were obtained for diversity of bacteria and archaea. Relationships between soil properties, nematode communities, and prokaryotic diversity were site-specific. For example, at the lowest elevation site, nematode communities contained a high proportion of fungal-feeding species and diversity of bacteria was lowest. At a high-salinity site, nematode density was highest, and overall, nematode density showed an unexpected, positive

We characterized soil communities in the Mojave Desert across an elevation gradient. Our goal was to test the hypothesis that as soil quality improved with increasing elevation (due to increased productivity), the diversity of soil prokaryotes and nematodes would also increase. Soil organic matter and soil moisture content increased with elevation as predicted. Soil salinity did not correlate to elevation, but was highest at a mid-gradient, alluvial site. Soil nematode density, community trophic structure, and diversity did not show patterns related to elevation. Similar results were obtained for diversity of bacteria and archaea. Relationships between soil properties, nematode communities, and prokaryotic diversity were site-specific. For example, at the lowest elevation site, nematode communities contained a high proportion of fungal-feeding species and diversity of bacteria was lowest. At a high-salinity site, nematode density was highest, and overall, nematode density showed an unexpected, positive

Concentrating solar plants in the Mojave Desert have brought up issues of water use, because concentrating solar power plants with wet-cooling systems have high water-consumption intensities compared to other types of electric power plants; only fossil-fuel plants with carbon-capture and storage may have higher water intensities.[37] A 2013 study comparing various sources of electricity found that the median water consumption during operations of concentrating solar power plants with wet cooling was 810 gal/MWhr for power tower plants and 890 gal/MWhr for trough plants. This was higher than the operational water consumption (with cooling towers) for nuclear (720 gal/MWhr), coal (530 gal/MWhr), or natural gas (210 gal/MWhr).[38] A 2011 study by the National Renewable Energy Laboratory came to similar conclusions: for power plants with cooling towers, water consumption during operations was 865 gal/MWhr for CSP trough, 786 gal/MWhr for CSP tower, 687 gal/MWhr for coal, 672 gal/MWhr for nuclear, ...

The creosote is a native of the Mojave, Sonoran and Chihuahuan deserts, meaning it is found across almost all of the U.S. Southwest and the adjacent desert regions of northern Mexico, from the Pacific Ocean to the Pecos River Valley. An evergreen, the creosote keeps itself alive in part by inhibiting the growth of some nearby plants. At the same time, it is also a nursery for small cacti and other types of plants, and cacti can often be found clustered around the base of a creosote bush.. The plant is a perennial and very drought-tolerant; it uses all available water to sustain its branches and puts on small, yellow flowers as well as gray, fuzzy fruits. Its name comes from the creosote odor put off by the plant. The odor is caused by rainfall that penetrates the waxy coating of the creosotes leaves, and Native Americans of the desert West, like more recent arrivals to the region, have always spoken of creosote as the smell of rain.. Though it is a native of the region, creosote is also ...

Plants erect, 0.8-4 dm. Inflores-cence branches: internodes glan-dular. Flowers 1.5-2.5 mm, peri-anth glabrous or sparsely hairy. Flowering Jun-Sep. Sandy to gravelly, often granitic or pumice flats and slopes, sagebrush communities, oak, montane, and subalpine conifer woodlands; 1300-3400 m; Calif., Idaho, Nev., Oreg. Variety reddingianum is widespread and often common to even locally weedy. It occurs in the mountains and cold desert regions of California from the Transverse Ranges northward in the mountains of eastern California and western Nevada, and in Californias North Coast Ranges. It is found also in less montane, mainly cold desert regions of southern Oregon, and disjunct at scattered sites in central Idaho.. ...

Are you heading to Morocco and planning to go overnight camping in the Sahara? Here is my Sahara Desert packing list to help you for your trip!

TY - JOUR. T1 - The Effect of Food Deserts on the Body Mass Index of Elementary Schoolchildren. AU - Thomsen, Michael R.. AU - Nayga, Jr, Rodolfo M.. AU - Alviola, Pedro A.. AU - Rouse, Heather L.. PY - 2016/1/1. Y1 - 2016/1/1. N2 - Families in low-income neighborhoods sometimes lack access to supermarkets that provide a broad range of healthy foods. We investigate whether these so called food deserts play a role in childhood obesity using a statewide panel data set of Arkansas elementary schoolchildren. We use fixed-effects panel data regression models to estimate the average food desert effect. We next compare children who left (entered) food deserts to children who were always (never) in food deserts and homogenize samples for those whose food desert status changed as a result of a change in residence and those whose status changed only as a consequence of the entry or exit of a supermarket. We present evidence that exposure to food deserts is associated with higher z-scores for body mass ...

The triatomine bugs are vectors of the protozoan parasite Trypanosoma cruzi, the causative agent of Chagas disease. Aggregation behavior plays an important role in their survival by facilitating the location of refuges and cohesion of aggregates, helping to keep them safely assembled into shelters during daylight time, when they are vulnerable to predators. There are evidences that aggregation is mediated by thigmotaxis, by volatile cues from their faeces, and by hexane-extractable contact chemoreceptive signals from their cuticle surface. The epicuticular lipids of Triatoma infestans include a complex mixture of hydrocarbons, free and esterified fatty acids, alcohols, and sterols. We analyzed the response of T. infestans fifth instar nymphs after exposure to different amounts either of total epicuticular lipid extracts or individual lipid fractions. Assays were performed in a circular arena, employing a binary choice test with filter papers acting as aggregation attractive sites; papers were either

Naturally occurring perchlorate has been observed in playa areas of the western United States, in nitrate deposits from northern Chile, and has also been observed at low concentrations in surface and groundwater in the southwestern United States, distant from industrial sources. Studies were conducted to determine if perchlorate could be formed when dry chloride salts were exposed to sunlight and laboratory ultraviolet light in the presence of desert soils and titanium dioxide. Several desert soils were surveyed to determine which soils contained the highest amounts of naturally occurring perchlorate. A soil from Death Valley (29/μg/kg) and a soil from the Black Rock Desert (16 μg/kg) were selected, along with titanium dioxide for further studies. The soils were washed to remove the existing perchlorate; additional chloride was added and exposed to sunlight and ultraviolet light for 1-4 months. Perchlorate was generated in both sunlight and ultraviolet light on the soils (,4-29 μg/kg). Higher ...

Brown, R. 1810. Prodromus Florae Novae Holandiae et Insulae Van-Diemen. Richard Taylor & Sons, London.. Copeland, E. B. 1947. Genera Filicum. Chronica Botanica Co., Waltham.. Gastony, G. J., and D. R. Rollo. 1995. Phylogeny and generic circumscriptions of cheilanthoid ferns (Pteridaceae: Cheilanthoideae) inferred from rbcL nucleotide sequences. American Fern Journal 85:341-360.. Gastony, G. J., and D. R. Rollo. 1998. Cheilanthoid ferns (Pteridaceae: Cheilanthoideae) in the southwestern United States and adjacent Mexico--A molecular phylogenetic reassessment of generic lines. Aliso 17:131-144.. Giauque, M. F. A. 1949. Wax glands and prothallia. American Fern Journal 39:33-35.. Hall, C. C. 1950. Notholaena copelandii, a newly recognized species of the Texano-Mexican region. American Fern Journal 40:178--187.. Hevly, R. H. 1963. Adaptations of cheilanthoid ferns to desert environments. Journal of the Arizona Academy of Science 2:164-175.. Mickel, J. T. 1979. The fern genus Cheilanthes in ...

Dr. Johnson will be teaching 15-20 other veterinarians and many veterinary technicians how to spay desert tortoises using a technique he developed. The class, sponsored by the US Fish and Wildlife Service and the Nevada Department of Wildlife, will be held in Las Vegas, Nevada next week.

The coloring/activity book was designed by Karin Mellin, artist and Principal of K.Mel Designs. Karins artwork combines elements of the poster with fanciful and true-to-life depictions of desert landscapes, plants and animals. Byrds words are infused throughout the drawings to inspire actions that desert dwellers can take to protect the ecological health of our shared desert home. On each page, PDEQ staff added thought-provoking inquiries to help connect the art and poetry with ideas to embrace resilient Sonoran Desert wisdom and integrate protective actions into our daily lives. There are also pages of resources for parents and teachers to support STEAM and Arizona Academic Standards at home or in the classroom.. The poster is available for purchase at the Tucson Audubon Societys Nature Shop (520.629.0510, x7015; www.tucsonaudubon.org/nature-shops), Antigone Book Store (520.792.3715; www.antigonebooks.com) and Old Town Artisans Art House Centro (520.620.1725; www.oldtownartisans.com/) . ...

Our Sonoran Desert Honey is sourced exclusively in the Sonoran Desert. This region ranges from central Arizona south into Sonora, Mexico. The plants, cactus, and flowers of this region are unique to this part of the world. The honey produced by bees from this region, ranges from the extra-light amber of Mesquite to light amber of Mesquite/wild flower blends. Our honey is bottled in small batches, which will maintain the unique flavor of each hive! 12oz. Infused with crushed Arizona Pecans.. This honey is 100% pure with only minimal processing to filter out honeycomb, wax, bee parts, and pollen.. ...

The aim of this study was to develop a stable cream from a local desert plant capable of producing Antisebum effects. Two creams (emulsions) were prepared, both of which were of w/o type. One was the formulation in which 5% extract obtained from the plant Capparis decidua was added during the preparation of the cream and the other was the base or control in which the extract was not added while other ingredients were the same as that of the formulation. Thirteen healthy male volunteers were selected and their initial sebum readings of both the cheeks were noted with the help of Sebumeter. The volunteers were given both the creams and asked to apply the creams on the face daily two times, the base on the right side and the formulation on the left side. The readings were taken every fifteen days for a period of three months. At the end of the study period, it was found that the formulation significantly decreased the sebum values on the left side. On the other hand, an increase in the sebum

Thu 23 Jan 2014 - Research scientists in Abu Dhabi claim to have made a breakthrough in sustainable aviation biofuel development, finding desert plants fed by seawater can produce biofuel more efficiently than other well-known feedstocks. The work, funded by Boeing, Etihad Airways and Honeywell UOP, is being carried out by the Sustainable Bioenergy Research Consortium (SBRC), which is affiliated with the Masdar Institute of Science and Technology. SBRC scientists will now test their findings in

Morocco travel agent and tour operator offering customized private and group tours to the Imperial cities, Sahara desert, High atlas, Berber villages, Beach holidays, Marrakech, Casablanca, Rabat, Fes and 4x4 luxury transport

The Silver-making Workshop in Amezrou is the perfect place to discover silversmiths and blacksmiths working by hand and side by side creating silver jewelry and other precious items. The silversmiths and the blacksmiths, trained by the old Jewish population, are still using the models left by them to make fibula (pins to hold garments together) and medallions. The overall process of silver making is one that can be observed on a tour to the Zagora and Mhamid Sahara Desert during an Mhamid Morocco Travel vacation. In Amezrou a demonstration of how silversmiths and blacksmiths work is available along with a workshop where artists and guests can participate in the process and keep what they make.. Amezrou, located just footsteps outside the 17th Century Jewish Mellah and home to the old Jewish Kasbah boasts a petite museum that is attached to its silver making facilities. Silver jewelry is still produced there and workshops are available through Travel Exploration Morocco. Jewish people lived in ...

A 22-year-old Nigerian woman attempting to migrate into Europe via the harsh Sahara Desert survived after being abandoned by traffickers for 10 days.

Plant hydraulic characteristics were studied in diploid, tetraploid and hexaploid cytotypes of Atriplex canescens (Chenopodiaceae) to investigate the potential physiological mechanism underlying the intraspecific habitat differentiation among plants of different ploidy levels. Populations of A. canescens from different habitats of the Chihuahuan Desert (New Mexico, USA) were analyzed using flow cytometry to determine ploidy levels. Traits related to xylem water transport efficiency and safety against drought-induced hydraulic failure were measured in both stems and leaves. At the stem level, cytotypes of higher ploidy levels showed consistently lower leaf-specific hydraulic conductivity but greater resistance to drought-induced loss of hydraulic conductivity. At the leaf level, comparisons in hydraulics between cytotypes did not show a consistent pattern, but exhibited high plasticity to proximal environmental conditions related to soil water availability. The results suggest that there is a ...

The Wilderness Act was passed by Congress in 1964 to ensure that population growth and development did not alter all of the Nations lands. The Wilderness Act established the National Wilderness Preservation System, which is composed of federally-owned areas designated by Congress as wilderness.. The California Desert Protection Act of 1994 is one of the largest pieces of wilderness legislation ever passed by Congress. Signed into law by President Clinton, the Act preserves the unrivaled values which portray the Old West and remain essentially unaltered by human activity.. The Bureau of Land Management has responsibility for 9.5 million acres of public lands in the southern California Desert. The California Desert Protection Act gives special wilderness designation to 69 individual BLM areas covering 3.6 million acres. Eighteen of those areas are partly or completely within the boundary of BLMs Needles Resource Area. Wilderness within the Resource Area totals more than 1.3 million acres. Below ...

TY - JOUR. T1 - Modern pollen-climate relationships in north Xinjiang, northwestern China. T2 - Implications for pollen-based reconstruction of Holocene climate. AU - Li, Furong. AU - Zhao, Yan. AU - Gaillard, Marie José. AU - Li, Huan. AU - Sun, Jinghui. AU - Xu, Qinghai. PY - 2017/7/1. Y1 - 2017/7/1. N2 - Fossil pollen records are widely used to reconstruct past climate. Such reconstructions require that the relationships between pollen assemblages, vegetation, and climate are well understood. These can be studied in present circumstances given we assume that modern vegetation and climate are analogous to past ones. In this study, we analyze pollen-vegetation-climate relationships in the Jungar desert and Altay Mountains, northwestern China, a region for which careful reconstruction of past climate is needed to answer unsolved questions on past climate in an area located at the boundary between two different climate regimes (westerlies and monsoon). We use a dataset of 66 surface pollen ...

Mycoplasma agassizii is one of the known causative agents of upper respiratory tract disease (URTD) in Mojave desert tortoises (Gopherus agassizii) and in gopher tortoises (Gopherus polyphemus). We sequenced the genomes ...

Posted on 07/24/2009 3:05:40 PM PDT by JoeProBono. A plan to build a 6,000km-long wall across the Sahara Desert to stop the spread of the desert has been outlined. The barrier - formed by solidifying sand dunes - would stretch from Mauritania in the west of Africa to Djibouti in the east. The plan was put forward by architect Magnus Larsson at the TED Global conference in Oxford. A 2007 UN study described desertification as the greatest environmental challenge of our times ...

As usual, Jurassic Park-era Jeff Goldblum was right: life can endure the driest conditions on Earth, which means it could find a way to exist within the arid soil on Mars. A planetary scientist tells Inverse Dr. Ian Malcolms reasoning is sound.. A new study published Monday in the Proceedings of the National Academy of Sciences (PNAS) finds that microbes have adapted to survive in South Americas Atacama Desert, the driest stretch of land on Earth. Despite very little water, bacteria in the Atacama soil could exist by going dormant - sometimes for decades - and waking up during rare rainstorms.. The researchers first visited the desert back in 2015 during one of those atypical showers. Using sterilized spoons, the team collected soil samples and analyzed the bacterial communities within. They found that, surprisingly, the microbes were reproducing like crazy.. Heres where things took a turn: Upon returning in 2016 and 2017, the team found that the microbes were becoming dormant as the soil ...

J. L. Schafer, Mudrak, E. L., Haines, C. E., Parag, H. A., Moloney, K. A., and Holzapfel, C., The association of native and non-native annual plants with Larrea tridentata (creosote bush) in the Mojave and Sonoran Deserts, Journal of Arid Environments, vol. 87, pp. 129-135, 2012. ...

Factors Affecting the Applicability of the Aet Model for Decomposition in Arid Environments PDF By author Elkins, N. Z., Y. Steinberger and W. G. Whitford last download was at 2016-11-13 55:09:59. This book is good alternative for Factors Affecting the Adsorption of Proteins on Wyoming Bentonite . Download now for free or you can read online Factors Affecting the Applicability of the Aet Model for Decomposition in Arid Environments book ...

Lily of the Desert. 1887 Geesling Rd., Denton, TX 76208, www.lilyofthedesert.com. DRINK MIX. New from Lily of the Desert, a recognized leader in the Aloe vera industry for over 40 years, is Aloe Mix n Go. These convenient, easy-to-use packets are drink mixes that contain the equivalent of 4 oz of Lily of the Desert Aloe vera. Each packet contains 200 active nutrients including amino acids, vitamins, minerals and enzymes to help keep the body healthy. Just mix one low-calorie, zero-sugar packet into a 16.9-fl. oz. bottle of water and enjoy the health benefits of Aloe vera. Aloe Mix nGo is available in four flavors: Original (Naturally Aloe Flavored), Lemonade, Strawberry-Kiwi and Pomegranate. One packet contains 20 calories or less and is naturally sweetened with xylitol and stevia. Distribution price: $9.05. Wholesale price: $12.07. MSRP: $19.99.. Lily of the Desert focuses on the health benefits of Aloe vera, a plant whose benefits include: digestion support, immune system support, ...

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SOG) and other materials, today announced the successful qualification of its SOG material with i3system, Inc., a world-class and leading-edge developer and manufacturer of thermal imaging and X-ray detector products.. Using Desert Silicons SOG material in our production line has allowed us to lower costs by reducing processing time and achieving a consistent, high level of performance, said Byeonggil Ra, purchasing manager, i3system, Inc. Desert Silicon is the only supplier we use for our SOG requirements, and we are satisfied with its reliable quality, on-time delivery, and knowledgeable technical assistance.. We are very pleased to announce our successful qualification with i3system, said Kent Ridgeway, founder and chief executive officer of Desert Silicon, Inc. This achievement represents a positive collaboration between our companies and is the result of our commitment to providing innovative, customizable SOG products, strong technical support, and a deeply-rooted customer-first ...

Datura discolor, also called the desert thorn-apple, is an herbaceous annual plant native to the Sonoran Desert of western North America, where it grows in sandy soils and washes. All parts of the plant contain a mix of alkaloids that are potentially lethal when enough is ingested. Deaths from careless recreational use of Daturas and related plants are frequently reported. The species was first described in 1833. The term discolor, meaning various colors, refers to its upward-growing trumpet-shaped flowers, which are white in the bell, and pale to dark violet from the narrow part of the bell to the base. The plant itself is an upright or low-lying shrub that can grow to 4 1/2 feet tall. Its foliage is light green, and its stalks have conspicuous purple stripes. The ovate-shaped leaves can be whole or toothed ...

Cold semi-arid climates (type BSk) tend to be located in elevated portions of temperate zones, typically bordering a humid continental climate or a Mediterranean climate. They are typically found in continental interiors some distance from large bodies of water. Cold semi-arid climates usually feature warm to hot dry summers, though their summers are typically not quite as hot as those of hot semi-arid climates. Unlike hot semi-arid climates, areas with cold semi-arid climates tend to have cold winters. These areas usually see some snowfall during the winter, though snowfall is much lower than at locations at similar latitudes with more humid climates. Areas featuring cold semi-arid climates tend to have higher elevations than areas with hot semi-arid climates, and tend to feature major temperature swings between day and night, sometimes by as much as 20 °C (36 °F) or more in that time frame. These large diurnal temperature variations are seldom seen in hot semi-arid climates. Cold semi-arid ...

Normally these beetles emerge in large numbers in mid to late spring and move together in bands crawling or running across the ground. They feed on succulent leaves and flower petals. The larva stage is subterranean and likely is parasitic in nests of ground-nesting bees.. Iron Cross Beetles conspicuous coloration is related to the fact that they carry cantharidin toxins that can interfer with the vertibrate nervous system - i.e. it is an aposemtic warning. In case you were wondering, you should not eat these insects. ...

Bursera microphylla (BM), one of the common elephant trees, is widely distributed in the Sonoran Desert in Mexico. The Seri ethnic group in the Sonoran Desert uses BM as an anti-inflammatory and painkiller drug for the treatment of sore throat, herpes labialis, abscessed tooth, and wound healing. Dried stems and leaves of BM are used in a tea to relieve painful urination and to stimulate bronchial secretion. Furthermore, BM is used for fighting venereal diseases. To investigate the effects of the hexane fraction of resin methanol extract (BM-H) on cell growth, the acute myeloid cell line (OCI-AML3) was treated with 250, 25, or 2 ...

In the late 1960s, LSD evangelist Art Kleps founded a psychedelic church called the Neo-American Church. The churchs newsletter was called Divine Toad Sweat.[3] In 1984, Bufo toad evangelist Albert Most revealed his Church of the Toad of Light with his publication of the book Bufo Alvarius: Psychedelic Toad of the Sonoran Desert. The Sonoran Desert is in New Mexico. This small booklet details how to use the Bufo toad for ritual and pleasure, as well as how to catch the Bufo alvarius toad, extract or milk the glandular secretions, dry them, and enjoy the smoked venom. Mosts book claims that 5-MeO-DMT (5-methoxy-N, N-dimethyltryptamine) is the active hallucinogen, not bufotenine. He is correct, as 5-MeO-DMT is the O-methylated version of bufotenine.[4] Again, it is important to mention that 5-MeO-DMT is present in only one of the more than 200 types of Bufo toads ...

Introduction. Australian Ectotherms & Endotherms What are Ectotherms and endotherms? Most animals are Ectotherms. Ectotherms are animals that cannot maintain a constant body temperature which means that their metabolism rates are affected by the exterior temperature of the environment. Endotherms are animals that can maintain a constant body temperature. So, this means that endotherms can control the rate of heat exchange by: panting; sweating; by using their physical characteristics-fur, hair, feathers or body fat for insulation; or by migration, burrowing, etc (which relates to the numerous behavioural characteristics used by these animals to control heat exchange). Most mammals and birds are endotherms. Examples of ectotherms Desert Lizard (from central Australia): Desert lizards regulate their body temperatures by trying to burrow or seek shelter under rocks when trying to avoid high temperatures. Some desert lizards can alter the colour on their back in order to reflect heat or to absorb ...

ALTHOUGH the physiology of the camel, kangaroo-rat, jerboa and various domestic animals of desert regions has been examined in some detail1,2, nothing is known of the heat and water relations of that most typical desert mammal, the gazelle. It has occasionally been suggested that gazelles may be able to live indefinitely on dry food without water, like desert rodents, but no experiments have been made to determine if this is true or whether, like camels, they need to drink. For this reason an investigation of the water economy of the Dorcas gazelle, Gazella dorcas dorcas (L.) is now being pursued here.

Pages - in B, Tellman, ed. Invasive Exotic Species in the Sonoran Region. Tucson: University of Arizona Press and the Arizona-Sonora Desert Museum Butler, DW, Fairfax, RJ () Buffel grass and fire in a gidgee and brigalow woodland: a case study from central Queensland.

El Paso has a transitional climate between cold desert climate (Köppen BWk) and hot desert climate (Köppen BWh) with hot summers, usually with little humidity, and cool, dry winters. Rainfall averages 9.7 in (250 mm) per year, much of which occurs during the summer from July through September, and is predominantly caused by the North American Monsoon. During this period, southerly and southeasterly winds carry moisture from the Pacific, the Gulf of California, and the Gulf of Mexico into the region. When this moisture moves into the El Paso area and places to the southwest, orographic lift from the mountains, combined with strong daytime heating, causes thunderstorms, some severe enough to produce flash flooding and hail, across the region.. The sun shines 302 days per year on average in El Paso, 83% of daylight hours, according to the National Weather Service; from this, the city is nicknamed The Sun City.[36] Due to its arid, windy climate, El Paso often experiences sand and dust storms ...

The Australian Outback - ancient, mysterious and often breathtakingly beautiful.. Listen to predawn birdsong echoing around Ormiston Gorge, an exhilarating flock of wild Budgerigars, Wedgebills - the windchimes of the desert, the cries of Black Cockatoos carrying across the plains, rare desert frogs and, under a full moon, the eerie wail of Dingoes.. Andrew comments:. The outback is one of our favourite places. It can be utterly bewitching - stark and dry, or full of life. This album captures that magic, but mostly through sheer luck on our part.. On the first night of our field trip, tired after a long day of driving, we camped in an unassuming patch of mulga. The next morning we awoke to find the place alive with birdsong. It had rained maybe a week previously - but only on this few square kilometers of country. Nomadic birds had arrived and begun breeding, and we were treated to a rarely heard richness of birdsong. We were in the right place, at the right time.. We were fortunate to get ...

AFRICAN NEWS AGENCY. The only independent news agency dedicated exclusively to Africa. Desert locusts in Mauritania not a threat to other states

Species extinctions and population declines have accelerated over recent decades due to habitat destruction, overexploitation, and invasive species (1, 2), with cascading effects on ecosystem functions and services as well as human well-being (3). Climate change has emerged as another powerful driver of species decline, one whose effects are beginning to intensify. It should lead to shifts in species distributions and rearranged communities (4), unless climatic disruption acts as a systemic threat leading to a community collapse (5).. Deserts are important bellwethers of climate change. Already defined by climatic extremes, deserts have warmed and dried more rapidly over the last 50 y than other ecoregions, both globally and in the contiguous United States (6, 7). These trends are predicted to continue through the end of the century (8). Climate change impacts desert species through the direct effects of thermal and hydric stress, and indirectly via impacts on habitat and food resources. ...

Hafellner, J. (2004) Buelliella (pp. 633-635) In: Nash III, T.H.; Ryan, B.D.; Diederich, P.; Gries, C. and Bungartz, F. (eds.), Lichen Flora of the Greater Sonoran Desert Region, Vol. 2. Lichens Unlimited, Arizona State University, Tempe, Arizona, 742 pages. **[RLL List # 196 / Rec.# 25986] - (Recent Literature on Lichens)** ...

Heidmarsson, S. and Breuss, O. (2004) Dermatocarpon (pp. 88-93) In: Nash III, T.H.; Ryan, B.D.; Diederich, P.; Gries, C. and Bungartz, F. (eds.), Lichen Flora of the Greater Sonoran Desert Region, Vol. 2. Lichens Unlimited, Arizona State University, Tempe, Arizona, 742 pages. **[RLL List # 196 / Rec.# 25889] - (Recent Literature on Lichens)** ...

The desert is full of jackrabbits but none as big as this one.. A giant sand sculpture in the shape of a jackrabbit was made on site for the Coachella Valley Wildflower Festival on Saturday at the Santa Rosa & San Jacinto Mountains National Monument Visitors Center in Palm Desert.. Professional sand sculptors Kirk Rademaker and Rusty Croft used 26 tons of sand for the piece. Croft said earlier in the week that it would be 6feet tall at its highest point and about 15 feet wide.. They started building the sculpture from a mound of sand on Wednesday and intended to keep working on it up until the festival, where it would be revealed. Depending on Mother Nature, it could remain in place for months.. Volunteers eventually will take it down.. The visitors center is located at 51-500 Highway 74, Palm Desert.. - Staff report. ...

Pictures of the Ryan Mountain Trail, Joshua Tree National Park, California: Mojave Desert collared lizard (crotaphytus bicinctores), by the trail to Ryan Mountain

TY - JOUR. T1 - Novel circoviruses detected in feces of sonoran felids. AU - Payne, Natalie. AU - Kraberger, Simona. AU - Fontenele, Rafaela S.. AU - Schmidlin, Kara. AU - Bergeman, Melissa H.. AU - Cassaigne, Ivonne. AU - Culver, Melanie. AU - Varsani, Arvind. AU - van Doorslaer, Koenraad. PY - 2020/9. Y1 - 2020/9. N2 - Sonoran felids are threatened by drought and habitat fragmentation. Vector range expansion and anthropogenic factors such as habitat encroachment and climate change are altering viral evolutionary dynamics and exposure. However, little is known about the diversity of viruses present in these populations. Small felid populations with lower genetic diversity are likely to be most threatened with extinction by emerging diseases, as with other selective pressures, due to having less adaptive potential. We used a metagenomic approach to identify novel circoviruses, which may have a negative impact on the population viability, from confirmed bobcat (Lynx rufus) and puma (Puma ...