habitat and landscape characteristics underlying anuran
... associated with those patterns. Urban density at the landscape scale had a significant negative influence on overall anuran abundance and diversity. While every species exhibited a decrease in abundance with increasing urban density, this pattern was especially pronounced for species requiring post-br ...
... associated with those patterns. Urban density at the landscape scale had a significant negative influence on overall anuran abundance and diversity. While every species exhibited a decrease in abundance with increasing urban density, this pattern was especially pronounced for species requiring post-br ...
Puma concolor
... Pumas are increasingly threatened by habitat loss and fragmentation due to human development of land. ...
... Pumas are increasingly threatened by habitat loss and fragmentation due to human development of land. ...
figure 3 koala habitat map - Roads and Maritime Services
... Option IS1 / IN2 and Option IS2 / IN2 have the highest potential level of impact on the habitats of threatened species associated with aquatic habitats. 2.3.2 Species listed under the Fisheries Management Act 1994 No high-conservation value fish species were listed within the Australian Museum Datab ...
... Option IS1 / IN2 and Option IS2 / IN2 have the highest potential level of impact on the habitats of threatened species associated with aquatic habitats. 2.3.2 Species listed under the Fisheries Management Act 1994 No high-conservation value fish species were listed within the Australian Museum Datab ...
Habitat degradation and fishing effects on the size structure of coral
... directly and indirectly through fishing or other processes, poses a major threat to the continued existence of many marine species (Roberts and Hawkins 1999, Rodwell et al. 2003), particularly those that are already endangered (Wilcove et al. 1998). Indeed, exploitation is believed to have caused 55% ...
... directly and indirectly through fishing or other processes, poses a major threat to the continued existence of many marine species (Roberts and Hawkins 1999, Rodwell et al. 2003), particularly those that are already endangered (Wilcove et al. 1998). Indeed, exploitation is believed to have caused 55% ...
Animal species diversity driven by habitat heterogeneity
... Journal of Biogeography 31, 79–92, ª 2004 Blackwell Publishing Ltd ...
... Journal of Biogeography 31, 79–92, ª 2004 Blackwell Publishing Ltd ...
Effects of resource abundance on habitat selection and spatial
... 2001; MCDONALD and ST CLAIR 2004) have been used. These studies have contributed significantly to the understanding of small mammal biology, however there are some important methodological drawbacks that should be taken into consideration when using these methods, and which leave room for improvemen ...
... 2001; MCDONALD and ST CLAIR 2004) have been used. These studies have contributed significantly to the understanding of small mammal biology, however there are some important methodological drawbacks that should be taken into consideration when using these methods, and which leave room for improvemen ...
Jaguarundi CH Petition Backup
... threats it faces. FWS should therefore designate critical habitat for the Jaguarundi. Legal Basis for Petition WildEarth Guardians submits this petition under the ESA’s provision to petition for the revision of a critical habitat designation (16 U.S.C. § 1533). The ESA requires a finding by the Secr ...
... threats it faces. FWS should therefore designate critical habitat for the Jaguarundi. Legal Basis for Petition WildEarth Guardians submits this petition under the ESA’s provision to petition for the revision of a critical habitat designation (16 U.S.C. § 1533). The ESA requires a finding by the Secr ...
Habitat preferences and stocking densities of Bontebok in the
... al. 1996, Wrench et al. 1997, Grant et al. 2001). Because no digestive system can absorb all nutrients from ingested food, food of a higher quality will result in faeces with a higher nutrient content (Grant et al. 2001). Faecal analysis has some advantages over other methods of determining diet qua ...
... al. 1996, Wrench et al. 1997, Grant et al. 2001). Because no digestive system can absorb all nutrients from ingested food, food of a higher quality will result in faeces with a higher nutrient content (Grant et al. 2001). Faecal analysis has some advantages over other methods of determining diet qua ...
Director Species Listing Section Threatened Species Scientific
... disruptions to their surrounding habitat. Their limited movement capability means that they are unable, or reluctant, to cross gaps in vegetation and move within or among fragmented habitats. The requirement to do so with the increasing destruction of their habitat results in increased mortality fro ...
... disruptions to their surrounding habitat. Their limited movement capability means that they are unable, or reluctant, to cross gaps in vegetation and move within or among fragmented habitats. The requirement to do so with the increasing destruction of their habitat results in increased mortality fro ...
a.16 western spadefoot toad - Butte Regional Conservation Plan
... deep (Stebbins 1972) and become active on the surface from October through April when enough rain has fallen (Morey and Guinn 1992). Western spadefoot toads breed from January to May. Breeding aggregations can form with over 1,000 individuals, but are usually much smaller. These groups are highly vo ...
... deep (Stebbins 1972) and become active on the surface from October through April when enough rain has fallen (Morey and Guinn 1992). Western spadefoot toads breed from January to May. Breeding aggregations can form with over 1,000 individuals, but are usually much smaller. These groups are highly vo ...
Endangered Species Act
... Predators such as owls that feed on pest species are highly valuable to farmers and others whose livelihoods are affected by pests. The burrowing owl is second only to the barn owl in economic importance for the multitude of insects and rodents that it eats around agricultural lands. Burrowing owls ...
... Predators such as owls that feed on pest species are highly valuable to farmers and others whose livelihoods are affected by pests. The burrowing owl is second only to the barn owl in economic importance for the multitude of insects and rodents that it eats around agricultural lands. Burrowing owls ...
Preface Introducing the reed warblers 3 Habitat characteristics
... 1 Island species - relatives, distribution, and ...
... 1 Island species - relatives, distribution, and ...
Juan Fernández petrel
... 2006). This use can be more competitive when nesting habits involve increased space requirements (area/volume), such as burrow digging. Moreover, two or more species nesting sympatrically in a colony at the same time may divide the niche that they share (Mouquet & Loreau 2002); this may be problemat ...
... 2006). This use can be more competitive when nesting habits involve increased space requirements (area/volume), such as burrow digging. Moreover, two or more species nesting sympatrically in a colony at the same time may divide the niche that they share (Mouquet & Loreau 2002); this may be problemat ...
Slide 1: NATURAL HISTORY of WHITE
... ticks are carriers. Damage to natural ecosystems: Decline in biodiversity with increase in deer populations. Continuous eating of wildflowers and herbs (will not grow back). Overconsumption of plants: causes ecosystem changes that affect animals, insects, amphibians, reptiles, birds, & other mamma ...
... ticks are carriers. Damage to natural ecosystems: Decline in biodiversity with increase in deer populations. Continuous eating of wildflowers and herbs (will not grow back). Overconsumption of plants: causes ecosystem changes that affect animals, insects, amphibians, reptiles, birds, & other mamma ...
Biodiversity Webquest
... Goal: To comprehend biodiversity and the key levels of: species, genetic, ecosystem and cultural diversity. Directions: Begin with the web page titled “Biodiversity Everything Counts” http://www.amnh.org/explore/ology What Is the Big Idea? (don’t forget to use the “next” button in this section) 1. W ...
... Goal: To comprehend biodiversity and the key levels of: species, genetic, ecosystem and cultural diversity. Directions: Begin with the web page titled “Biodiversity Everything Counts” http://www.amnh.org/explore/ology What Is the Big Idea? (don’t forget to use the “next” button in this section) 1. W ...
Blue-winged Teal Blue-winged Teal Minnesota Conservation
... Important predictors of breeding habitat include water level, benthic invertebrate abundance, and the availability of undisturbed nesting cover adjacent to water. Grasslands are the preferred nesting cover, but croplands also are used. Nests are almost always placed in upland habitats with res ...
... Important predictors of breeding habitat include water level, benthic invertebrate abundance, and the availability of undisturbed nesting cover adjacent to water. Grasslands are the preferred nesting cover, but croplands also are used. Nests are almost always placed in upland habitats with res ...
Newton`s Laws of Motion - Augusta Independent Schools
... Factors that Threaten Biodiversity The current high rate of extinction is due to the activities of a single species—Homo sapiens. Humans are changing conditions on Earth faster than new traits can evolve to cope with the new conditions. ...
... Factors that Threaten Biodiversity The current high rate of extinction is due to the activities of a single species—Homo sapiens. Humans are changing conditions on Earth faster than new traits can evolve to cope with the new conditions. ...
Levin, S.A. (editor). Encyclopedia
... cowbird abundance was strongly correlated with land uses such as urban and agricultural lands with livestock grazing. These land uses created areas where parasitism rates were so high that local reproduction in sparrow populations could not replace individuals lost to mortality (i.e., ro0). Their re ...
... cowbird abundance was strongly correlated with land uses such as urban and agricultural lands with livestock grazing. These land uses created areas where parasitism rates were so high that local reproduction in sparrow populations could not replace individuals lost to mortality (i.e., ro0). Their re ...
Spruce-fir forest - Spruce-fir forests occur on high mountaintops in
... Fraser fir dominance above 6,000 feet. ...
... Fraser fir dominance above 6,000 feet. ...
A Biodiversity Primer for Ontario
... distinct populations was much higher. However, even all this diversity could not stand up to over-harvest, sea lamprey predation and loss of habitat, particularly inshore rubble shoals required for spawning. Catches plunged to 10% of original yield in Lake Superior and basically nothing in the other ...
... distinct populations was much higher. However, even all this diversity could not stand up to over-harvest, sea lamprey predation and loss of habitat, particularly inshore rubble shoals required for spawning. Catches plunged to 10% of original yield in Lake Superior and basically nothing in the other ...
Long-billed Curlew (Numenius americanus)
... Jones 2009). In addition, increased temperatures and drought events associated with climate change are predicted to impact the prairie region (Barrow and Yu 2005) and likely pose a long-term threat to Long-billed Curlew habitat. See Tables 2 and 3. Habitat availability: In the Prairie Ecosystem of C ...
... Jones 2009). In addition, increased temperatures and drought events associated with climate change are predicted to impact the prairie region (Barrow and Yu 2005) and likely pose a long-term threat to Long-billed Curlew habitat. See Tables 2 and 3. Habitat availability: In the Prairie Ecosystem of C ...
Review for the Ecology Unit Test!
... This graph shows the effect of interspecific competition on the population size of two species of paramecia, Paramecium aurelia and Paramecium caudatum. When either species was cultured alone — with fresh food added regularly — the population grew exponentially at first and then leveled off. However ...
... This graph shows the effect of interspecific competition on the population size of two species of paramecia, Paramecium aurelia and Paramecium caudatum. When either species was cultured alone — with fresh food added regularly — the population grew exponentially at first and then leveled off. However ...
The effect of human disturbance on the local distribution of American
... disturbance. New Jersey is the most densely populated state in the United States, and the population in coastal counties swells during the summer months. The state’s beaches are in close proximity to major metropolitan areas including New York City, which is the third most populated coastal city in ...
... disturbance. New Jersey is the most densely populated state in the United States, and the population in coastal counties swells during the summer months. The state’s beaches are in close proximity to major metropolitan areas including New York City, which is the third most populated coastal city in ...
Documented Impacts
... 100% of the sage-grouse diet during winter. (Hockett 2002), 106. Unfortunately for the sage-grouse, livestock have grazed most of its habitat; scientists identify livestock grazing as an important factor associated with the widespread decline and degradation of sage-grouse habitat. (Hockett 2002), 1 ...
... 100% of the sage-grouse diet during winter. (Hockett 2002), 106. Unfortunately for the sage-grouse, livestock have grazed most of its habitat; scientists identify livestock grazing as an important factor associated with the widespread decline and degradation of sage-grouse habitat. (Hockett 2002), 1 ...
Habitat destruction
Habitat destruction is the process in which natural habitat is rendered functionally unable to support the species present. In this process, the organisms that previously used the site are displaced or destroyed, reducing biodiversity. Habitat destruction by human activity is mainly for the purpose of harvesting natural resources for industry production and urbanization. Clearing habitats for agriculture is the principal cause of habitat destruction. Other important causes of habitat destruction include mining, logging, trawling and urban sprawl. Habitat destruction is currently ranked as the primary cause of species extinction worldwide. It is a process of natural environmental change that may be caused by habitat fragmentation, geological processes, climate change or by human activities such as the introduction of invasive species, ecosystem nutrient depletion, and other human activities mentioned below.The terms habitat loss and habitat reduction are also used in a wider sense, including loss of habitat from other factors, such as water and noise pollution.