Desert kit fox CESA petition 3-10-13
... The desert kit fox (Vulpes macrotis arsipus) is an uncommon to rare inhabitant of the Mojave and Colorado deserts in California. The subspecies has historically been broadly distributed across the California desert where it relies on sparsely vegetated scrub habitats such as creosote scrub communiti ...
... The desert kit fox (Vulpes macrotis arsipus) is an uncommon to rare inhabitant of the Mojave and Colorado deserts in California. The subspecies has historically been broadly distributed across the California desert where it relies on sparsely vegetated scrub habitats such as creosote scrub communiti ...
Bolson Tortoise - the El Paso Zoo
... and many other species. They also eat annual and perennial grasses and fresh pads and buds of some species of cactus. After the annual wildflowers have dried in spring, tortoises will eat the dried plants throughout late spring and into summer and fall. Consumption of dried plant material is somewha ...
... and many other species. They also eat annual and perennial grasses and fresh pads and buds of some species of cactus. After the annual wildflowers have dried in spring, tortoises will eat the dried plants throughout late spring and into summer and fall. Consumption of dried plant material is somewha ...
Enhancing and Restoring Habitat for the Desert Tortoise
... threatened species with declining populations in the Mojave Desert and western Sonoran Desert. To support recovery efforts, we synthesized published information on relationships of desert tortoises with three habitat features (cover sites, forage, and soil) and candidate management practices for imp ...
... threatened species with declining populations in the Mojave Desert and western Sonoran Desert. To support recovery efforts, we synthesized published information on relationships of desert tortoises with three habitat features (cover sites, forage, and soil) and candidate management practices for imp ...
Gopherus agassizii - Desert Tortoise Council
... threatened species with declining populations in the Mojave Desert and western Sonoran Desert. To support recovery efforts, we synthesized published information on relationships of desert tortoises with three habitat features (cover sites, forage, and soil) and candidate management practices for imp ...
... threatened species with declining populations in the Mojave Desert and western Sonoran Desert. To support recovery efforts, we synthesized published information on relationships of desert tortoises with three habitat features (cover sites, forage, and soil) and candidate management practices for imp ...
Desert Pupfish (Cyprinodon macularius)
... 1980; USFWS 1993), pupfish typically prefer clear water, with either rooted or unattached aquatic plants, restricted surface flow, or sand–silt substrates. Pupfish use shallow water habitats extensively, often occupying such habitat at temperatures that are above the thermal optimum for invasive fis ...
... 1980; USFWS 1993), pupfish typically prefer clear water, with either rooted or unattached aquatic plants, restricted surface flow, or sand–silt substrates. Pupfish use shallow water habitats extensively, often occupying such habitat at temperatures that are above the thermal optimum for invasive fis ...
Sediments Rock - Dauphin Island Sea Lab
... story of earth." Sand is the term applied to natural particles with a grain diameter between 1/16 mm and 2 mm. Sand can also be defined as a deposit, a loose aggregate of sand sized particles. Sands are classified in many ways. One way is based on the parent rock. Some are continental sands, which a ...
... story of earth." Sand is the term applied to natural particles with a grain diameter between 1/16 mm and 2 mm. Sand can also be defined as a deposit, a loose aggregate of sand sized particles. Sands are classified in many ways. One way is based on the parent rock. Some are continental sands, which a ...
Regional environments, lifehistory patterns, and
... relatively restricted to arid habitats, although populations of all three species experience a variety of rainfall regimes and regional topographies. Where studied, 0. ornatus and H . nzgra hibernate during the long, often cool or cold dry season; they forage following warm-season rains. A . 1. juda ...
... relatively restricted to arid habitats, although populations of all three species experience a variety of rainfall regimes and regional topographies. Where studied, 0. ornatus and H . nzgra hibernate during the long, often cool or cold dry season; they forage following warm-season rains. A . 1. juda ...
Groundwater Book.QXD - Namibian Hydrogeological Association
... porosity of the soil play an important role in preventing or enabling water to seep below the zone of evaporation. An example is provided from southern Namibia where sedimentary rocks of contrasting permeability are juxtaposed across a fault (as shown in the diagram). The Aubures sandstones are non- ...
... porosity of the soil play an important role in preventing or enabling water to seep below the zone of evaporation. An example is provided from southern Namibia where sedimentary rocks of contrasting permeability are juxtaposed across a fault (as shown in the diagram). The Aubures sandstones are non- ...
Assessing age in the desert tortoise Gopherus
... age data on individuals is a relatively easy task because of their visibility, rapid growth, and short life spans. Age determination becomes increasingly difficult with long-lived animals, especially for ones that disappear from researchers’ observations for lengthy periods of time each year. Turtle ...
... age data on individuals is a relatively easy task because of their visibility, rapid growth, and short life spans. Age determination becomes increasingly difficult with long-lived animals, especially for ones that disappear from researchers’ observations for lengthy periods of time each year. Turtle ...
pdf file - UNM Biology - University of New Mexico
... El Niño in 1997–1998. Neither was followed by an increase in rodent abundance. In fact, rodents reached near all-time low numbers during and after the double 1991–1992 and 1992–1993 event. Furthermore, after near-record lows in the mid-1990s, rodents reached near-record high numbers in the summer of ...
... El Niño in 1997–1998. Neither was followed by an increase in rodent abundance. In fact, rodents reached near all-time low numbers during and after the double 1991–1992 and 1992–1993 event. Furthermore, after near-record lows in the mid-1990s, rodents reached near-record high numbers in the summer of ...
South Australian Arid Lands Biodiversity Strategy
... undulating plains with some granite inselbergs and silcrete-capped mesas grade into silcretecapped tablelands in the east. Further south, in the Pedirka Desert, gently undulating plains with parallel dunes are dominant. The Simpson-Strzelecki Dunefields bioregion is one of the largest linear sand du ...
... undulating plains with some granite inselbergs and silcrete-capped mesas grade into silcretecapped tablelands in the east. Further south, in the Pedirka Desert, gently undulating plains with parallel dunes are dominant. The Simpson-Strzelecki Dunefields bioregion is one of the largest linear sand du ...
Soil biology and agriculture in the tropics
... processes are involved in the formation of resource islands. The loss of semi-arid grassland in favor of invading desert shrubs initiates changes in the distribution of soil nutrients, which may promote further invasion and persistence of shrubs. Hence, the invasion of semi-arid grasslands by desert ...
... processes are involved in the formation of resource islands. The loss of semi-arid grassland in favor of invading desert shrubs initiates changes in the distribution of soil nutrients, which may promote further invasion and persistence of shrubs. Hence, the invasion of semi-arid grasslands by desert ...
Chapter Six: BIOMES
... Cone shape of the trees helps to prevent the snow from covering them which could cause the branches to break Extremely low decomposition rate and acidic soil ...
... Cone shape of the trees helps to prevent the snow from covering them which could cause the branches to break Extremely low decomposition rate and acidic soil ...
CALIFORNIA`S DESERTS, PART 1: BIOLOGY AND ECOLOGY
... activities, and energy generation into one of the largest remaining frontiers on the continent. Policymakers and land managers are embroiled in particular on debate over the siting of utility scale solar and wind renewable energy facilities. Despite the fantastic ability of desert ecosystems to with ...
... activities, and energy generation into one of the largest remaining frontiers on the continent. Policymakers and land managers are embroiled in particular on debate over the siting of utility scale solar and wind renewable energy facilities. Despite the fantastic ability of desert ecosystems to with ...
DesertCymopterus
... establishment has not been reported for this species. Establishment of new individuals in a population may be infrequent given that many reported desert cymopterus populations are highly dispersed and low density (NatureServe 2010). Depending on the year, desert cymopterus flowers between early Marc ...
... establishment has not been reported for this species. Establishment of new individuals in a population may be infrequent given that many reported desert cymopterus populations are highly dispersed and low density (NatureServe 2010). Depending on the year, desert cymopterus flowers between early Marc ...
Interactions between winter and summer annuals in
... annuals in that season. Therefore, variation in precipitation between successive seasons cannot account in any single way for patterns seen in the annual plants. There is no doubt that abundance and other measures of annual plant performance are aected by precipitation. However, such eects may be ...
... annuals in that season. Therefore, variation in precipitation between successive seasons cannot account in any single way for patterns seen in the annual plants. There is no doubt that abundance and other measures of annual plant performance are aected by precipitation. However, such eects may be ...
biomes Part2 - Fulton County Schools
... no vegetation, long periods without rain, and extreme temperatures. • Although there are hot and cold deserts, one characteristic they both share is the fact that they are the driest places on Earth. • Deserts are often located near large mountain ranges because mountains can block the passage of mo ...
... no vegetation, long periods without rain, and extreme temperatures. • Although there are hot and cold deserts, one characteristic they both share is the fact that they are the driest places on Earth. • Deserts are often located near large mountain ranges because mountains can block the passage of mo ...
Biome - Effingham County Schools
... Ex: Sahara desert in Africa Temperature changes during day: 100F + in day to cool at night; daytime temps hot all year long Very few plants ...
... Ex: Sahara desert in Africa Temperature changes during day: 100F + in day to cool at night; daytime temps hot all year long Very few plants ...
Document Word - UNESCO World Heritage Centre
... 1997), and the lowest below -20 ℃ in winter. Diurnal temperature difference reaches over 40 ℃. The annual precipitation is less than 100 mm, while evaporation reaches 2500-3400mm. Sand movements are frequent and intense throughout the year. The sandstorm days make up one third of a year, and maximum ...
... 1997), and the lowest below -20 ℃ in winter. Diurnal temperature difference reaches over 40 ℃. The annual precipitation is less than 100 mm, while evaporation reaches 2500-3400mm. Sand movements are frequent and intense throughout the year. The sandstorm days make up one third of a year, and maximum ...
Les biomes : les facteurs de distribution
... and extreme temperatures. There are cold deserts (for ice deserts example, the ________________________ of the Arctic), hot deserts, sand deserts and stone deserts. They are found at all latitudes yet all share the following characteristics: less ________________________ than 25 cm of annual precipi ...
... and extreme temperatures. There are cold deserts (for ice deserts example, the ________________________ of the Arctic), hot deserts, sand deserts and stone deserts. They are found at all latitudes yet all share the following characteristics: less ________________________ than 25 cm of annual precipi ...
Interactions between Sonoran Desert Toads
... glandular secretions. The image is also notable for the time of year. Sonoran Desert Toads are not typically active in January. Of 403 specimens from Sonora in 19 herpetological collections, only one was collected in January (UAZ 14145, R. Felger near the Guaymas Airport, January 1965). Badgers are ...
... glandular secretions. The image is also notable for the time of year. Sonoran Desert Toads are not typically active in January. Of 403 specimens from Sonora in 19 herpetological collections, only one was collected in January (UAZ 14145, R. Felger near the Guaymas Airport, January 1965). Badgers are ...
Student - Amazon S3
... survive, with a growing season of two to three months. It is cold almost all year long. t) The ________________________ is the last and highest zone, at more than 3000 m altitude. It features ________________________ but almost no vegetation, except for lichen that have adapted to the climate. ...
... survive, with a growing season of two to three months. It is cold almost all year long. t) The ________________________ is the last and highest zone, at more than 3000 m altitude. It features ________________________ but almost no vegetation, except for lichen that have adapted to the climate. ...
Grassland, Desert, and Tundra Biomes
... Plants of the Desert All desert plants have adaptations for obtaining and conserving water, which allows the plants to live in dry, desert conditions. Plants called succulents, such as cactuses, have thick, fleshy stems and leaves that store water. Their leaves also have a waxy coating that prevent ...
... Plants of the Desert All desert plants have adaptations for obtaining and conserving water, which allows the plants to live in dry, desert conditions. Plants called succulents, such as cactuses, have thick, fleshy stems and leaves that store water. Their leaves also have a waxy coating that prevent ...
Grassland, Desert, and Tundra Biomes
... Plants of the Desert All desert plants have adaptations for obtaining and conserving water, which allows the plants to live in dry, desert conditions. Plants called succulents, such as cactuses, have thick, fleshy stems and leaves that store water. Their leaves also have a waxy coating that prevent ...
... Plants of the Desert All desert plants have adaptations for obtaining and conserving water, which allows the plants to live in dry, desert conditions. Plants called succulents, such as cactuses, have thick, fleshy stems and leaves that store water. Their leaves also have a waxy coating that prevent ...
6th Grade Science Biomes Project
... plain, which is a good description of the biome. Tundra biome is located in the artic circle, which is a circle that surrounds the north pole, but this is not the only place we can find freezing cold temperatures and a few animals. In Antarctica, and other cold environments, there are areas that can ...
... plain, which is a good description of the biome. Tundra biome is located in the artic circle, which is a circle that surrounds the north pole, but this is not the only place we can find freezing cold temperatures and a few animals. In Antarctica, and other cold environments, there are areas that can ...
Desert
A desert is a barren area of land where little precipitation occurs and consequently living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to the processes of denudation. About one third of the land surface of the world is arid or semi-arid. This includes much of the polar regions where little precipitation occurs and which are sometimes called ""cold deserts"". Deserts can be classified by the amount of precipitation that falls, by the temperature that prevails, by the causes of desertification or by their geographical location.Deserts are formed by weathering processes as large variations in temperature between day and night put strains on the rocks which consequently break in pieces. Although rain seldom occurs in deserts, there are occasional downpours that can result in flash floods. Rain falling on hot rocks can cause them to shatter and the resulting fragments and rubble strewn over the desert floor is further eroded by the wind. This picks up particles of sand and dust and wafts them aloft in sand or dust storms. Wind-blown sand grains striking any solid object in their path can abrade the surface. Rocks are smoothed down, and the wind sorts sand into uniform deposits. The grains end up as level sheets of sand or are piled high in billowing sand dunes. Other deserts are flat, stony plains where all the fine material has been blown away and the surface consists of a mosaic of smooth stones. These areas are known as desert pavements and little further erosion takes place. Other desert features include rock outcrops, exposed bedrock and clays once deposited by flowing water. Temporary lakes may form and salt pans may be left when waters evaporate. There may be underground sources of water in the form of springs and seepages from aquifers. Where these are found, oases can occur.Plants and animals living in the desert need special adaptations to survive in the harsh environment. Plants tend to be tough and wiry with small or no leaves, water-resistant cuticles and often spines to deter herbivory. Some annual plants germinate, bloom and die in the course of a few weeks after rainfall while other long-lived plants survive for years and have deep root systems able to tap underground moisture. Animals need to keep cool and find enough food and water to survive. Many are nocturnal and stay in the shade or underground during the heat of the day. They tend to be efficient at conserving water, extracting most of their needs from their food and concentrating their urine. Some animals remain in a state of dormancy for long periods, ready to become active again when the rare rains fall. They then reproduce rapidly while conditions are favorable before returning to dormancy.People have struggled to live in deserts and the surrounding semi-arid lands for millennia. Nomads have moved their flocks and herds to wherever grazing is available and oases have provided opportunities for a more settled way of life. The cultivation of semi-arid regions encourages erosion of soil and is one of the causes of increased desertification. Desert farming is possible with the aid of irrigation and the Imperial Valley in California provides an example of how previously barren land can be made productive by the import of water from an outside source. Many trade routes have been forged across deserts, especially across the Sahara Desert, and traditionally were used by caravans of camels carrying salt, gold, ivory and other goods. Large numbers of slaves were also taken northwards across the Sahara. Some mineral extraction also takes place in deserts and the uninterrupted sunlight gives potential for the capture of large quantities of solar energy.