Relative importance of resource quantity, isolation and habitat
... isolation effects are less obvious as shown for plant and butterfly community studies in Germany (SteffanDewenter and Tscharntke 2000, Krauss et al. 2003a, b, 2004b). As community studies lack the sensitivity to detect effects on single species, we chose a monophagous habitat specialist, the butterf ...
... isolation effects are less obvious as shown for plant and butterfly community studies in Germany (SteffanDewenter and Tscharntke 2000, Krauss et al. 2003a, b, 2004b). As community studies lack the sensitivity to detect effects on single species, we chose a monophagous habitat specialist, the butterf ...
Parks Conservation and Lands - Commissioner for Sustainability
... populations and other ecological principles are part of Metapopulation Theory. Numerous ecological studies and ecological theory indicate that when habitat is reduced in area and fragmented into small disconnected patches, the small populations of animals and plants dependent on that habitat face a ...
... populations and other ecological principles are part of Metapopulation Theory. Numerous ecological studies and ecological theory indicate that when habitat is reduced in area and fragmented into small disconnected patches, the small populations of animals and plants dependent on that habitat face a ...
Tipton Kangaroo Rat - Bakersfield Habitat Conservation Plan
... animals per hectare (January; rainy season) and 5.5 animals per hectare (May; dry season). Other studies at Lemoore calculated densities of 1.5 ± 0.5 animals per hectare overall and 13.5 ± 4.4 animals per hectare in focus areas. A study at the Highway 41 and Jackson Avenue site near Naval Air Statio ...
... animals per hectare (January; rainy season) and 5.5 animals per hectare (May; dry season). Other studies at Lemoore calculated densities of 1.5 ± 0.5 animals per hectare overall and 13.5 ± 4.4 animals per hectare in focus areas. A study at the Highway 41 and Jackson Avenue site near Naval Air Statio ...
Prey abundance and habitat use by migratory shorebirds
... predator pressures, habitat use) has not been examined as often or as extensively. Our study focuses on characterizing several of these food-rich stopover areas along the Connecticut coast by determining both the resource availability and shorebird use of these areas. Since the ecologies of shorebir ...
... predator pressures, habitat use) has not been examined as often or as extensively. Our study focuses on characterizing several of these food-rich stopover areas along the Connecticut coast by determining both the resource availability and shorebird use of these areas. Since the ecologies of shorebir ...
A hierarchical view of habitat and its relationship to species
... For this model to work, one must assume the same general shape for the bell curve for most species under consideration. If one sampled a pool of similar bell-shaped curves, those with broader bases would, on average, have higher peaks and higher mean densities. The assumption of curve similarity la ...
... For this model to work, one must assume the same general shape for the bell curve for most species under consideration. If one sampled a pool of similar bell-shaped curves, those with broader bases would, on average, have higher peaks and higher mean densities. The assumption of curve similarity la ...
stochastic processes across scales Disentangling the importance of
... among species in their abilities to use different resources. As the antithesis to niche theory, Hubbell’s [8] neutral theory challenged the dominant paradigm to suggest that pervasive dispersal limitation, ecological drift and a balance between random extinction and speciation could explain a wide v ...
... among species in their abilities to use different resources. As the antithesis to niche theory, Hubbell’s [8] neutral theory challenged the dominant paradigm to suggest that pervasive dispersal limitation, ecological drift and a balance between random extinction and speciation could explain a wide v ...
Progress
... during this year, more projects involving other organisms and their interactions with plants have been initiated, thereby providing a more holistic approach to the subject. Indeed, the multidisciplinary nature of several of the projects is refreshing and relevant. Related to this approach is the inc ...
... during this year, more projects involving other organisms and their interactions with plants have been initiated, thereby providing a more holistic approach to the subject. Indeed, the multidisciplinary nature of several of the projects is refreshing and relevant. Related to this approach is the inc ...
Responses of Tropical Bats to Habitat Fragmentation, Logging, and
... 4.1 Habitat Conversion: A Key Aspect of Global Change Bats are valuable indicators of biodiversity and ecosystem health, and respond to a range of stressors related to environmental change (Jones et al. 2009). Alteration in land use is one of the principal aspects of global environmental change and ...
... 4.1 Habitat Conversion: A Key Aspect of Global Change Bats are valuable indicators of biodiversity and ecosystem health, and respond to a range of stressors related to environmental change (Jones et al. 2009). Alteration in land use is one of the principal aspects of global environmental change and ...
THE EXPANSION OF CONSERVATION GENETICS
... review. Another emerging area of conservation genetics that we do not cover in detail comprises studies that combine genetic methodology with ecological and landscape approaches. Such studies can provide conservation biologists with a much more accurate picture of the complex systems that they work ...
... review. Another emerging area of conservation genetics that we do not cover in detail comprises studies that combine genetic methodology with ecological and landscape approaches. Such studies can provide conservation biologists with a much more accurate picture of the complex systems that they work ...
Evaluating MPA effectiveness
... essential for the validity of model development. Environmental variability might decouple key relationships (e.g., stock-recruitment). There is uncertainty in defining the stock, and measuring the degree of linkage between sub-populations at different sites. The required targets for percentage of st ...
... essential for the validity of model development. Environmental variability might decouple key relationships (e.g., stock-recruitment). There is uncertainty in defining the stock, and measuring the degree of linkage between sub-populations at different sites. The required targets for percentage of st ...
A Case Study in Concept Determination: Ecological Diversity.
... species’ proportional abundance deviates, not what species it is, is relevant when assessing a community’s diversity.14 (A5) is neutral, however, about whether rare or abundant species are more important to the diversity of a community. It requires merely that equal changes in the abundances of two ...
... species’ proportional abundance deviates, not what species it is, is relevant when assessing a community’s diversity.14 (A5) is neutral, however, about whether rare or abundant species are more important to the diversity of a community. It requires merely that equal changes in the abundances of two ...
Collapse of the world`s largest herbivores
... Hunting large herbivores for body parts is also driving down populations of some species, especially the iconic ones. Organized crime is facilitating a dramatic decline of elephants and rhinoceros in parts of Africa and southern Asia, reversing decades of conservation accomplishments. Poaching and i ...
... Hunting large herbivores for body parts is also driving down populations of some species, especially the iconic ones. Organized crime is facilitating a dramatic decline of elephants and rhinoceros in parts of Africa and southern Asia, reversing decades of conservation accomplishments. Poaching and i ...
management of feral animals
... successful that it is now the most common small mammal in Australia (DEWHA 2008a). They are most abundant on deep sandy soils, such as soils of the Swan Coastal Plain, which is preferred for warren construction. They are also most successful in intermediate rainfall areas where droughts and parasite ...
... successful that it is now the most common small mammal in Australia (DEWHA 2008a). They are most abundant on deep sandy soils, such as soils of the Swan Coastal Plain, which is preferred for warren construction. They are also most successful in intermediate rainfall areas where droughts and parasite ...
methods - San Francisco State University
... 1991). These extensive tidal marshes have now been reduced by more than 80% (95% in the Delta). Despite impacts from surrounding development, these remaining ecosystems are of critical regional importance for biodiversity, harboring a number of rare plant and animal species, including almost 50 spec ...
... 1991). These extensive tidal marshes have now been reduced by more than 80% (95% in the Delta). Despite impacts from surrounding development, these remaining ecosystems are of critical regional importance for biodiversity, harboring a number of rare plant and animal species, including almost 50 spec ...
Interspecific Abundance-Range Size Relationships
... at low densities will tend to be recorded from fewer localities than species that occur at high densities, even if they are actually equally widely distributed. Indeed, it is not unknown for locally rare species, originally thought to have very restricted ranges, to be found to be considerably more ...
... at low densities will tend to be recorded from fewer localities than species that occur at high densities, even if they are actually equally widely distributed. Indeed, it is not unknown for locally rare species, originally thought to have very restricted ranges, to be found to be considerably more ...
Impact of argentine ants (Linepithema humile, Mayr) on saproxylic
... The collection and removal of deadwood, for domestic fuel or for aesthetic reasons (by park managers) are major threats to saproxylic communities. Although these practices do not take place in the Cape Peninsula, past and current human activities have produced a mosaic of disturbed habitats embedded ...
... The collection and removal of deadwood, for domestic fuel or for aesthetic reasons (by park managers) are major threats to saproxylic communities. Although these practices do not take place in the Cape Peninsula, past and current human activities have produced a mosaic of disturbed habitats embedded ...
Biotic interactions and speciation in the tropics
... a result of extinctions caused by successive glacial periods. Hence, the greater effective time for diversification in the tropics facilitated the evolution of high species richness: ‘In the one, evolution has had a fair chance; in the other it has had countless difficulties thrown in its way’ (Wall ...
... a result of extinctions caused by successive glacial periods. Hence, the greater effective time for diversification in the tropics facilitated the evolution of high species richness: ‘In the one, evolution has had a fair chance; in the other it has had countless difficulties thrown in its way’ (Wall ...
Ecology Targets
... Essential Question: “ How does energy flow through an ecosystem?” Remember, this will be a written question on the next exam worth 10 points. ...
... Essential Question: “ How does energy flow through an ecosystem?” Remember, this will be a written question on the next exam worth 10 points. ...
Disentangling the importance of ecological niches from stochastic
... among species in their abilities to use different resources. As the antithesis to niche theory, Hubbell’s [8] neutral theory challenged the dominant paradigm to suggest that pervasive dispersal limitation, ecological drift and a balance between random extinction and speciation could explain a wide v ...
... among species in their abilities to use different resources. As the antithesis to niche theory, Hubbell’s [8] neutral theory challenged the dominant paradigm to suggest that pervasive dispersal limitation, ecological drift and a balance between random extinction and speciation could explain a wide v ...
Population, community and ecosystem effects of
... Species introductions represent one of the three greatest threats to biodiversity globally; alongside climatic change and habitat loss. Exotic invasive species have been reported to greatly alter native diversity, transforming native ecosystems as well as contributing to the extinction of endangered ...
... Species introductions represent one of the three greatest threats to biodiversity globally; alongside climatic change and habitat loss. Exotic invasive species have been reported to greatly alter native diversity, transforming native ecosystems as well as contributing to the extinction of endangered ...
species extinction
... •Alligator meat is promoted as a way to cure the common cold and to prevent cancer, and alligator organs are also said to have medicinal properties. Asian elephants are killed for their meat, hide, tusks and other body parts. In Myanmar, for example, small pieces of elephant foot are turned into a p ...
... •Alligator meat is promoted as a way to cure the common cold and to prevent cancer, and alligator organs are also said to have medicinal properties. Asian elephants are killed for their meat, hide, tusks and other body parts. In Myanmar, for example, small pieces of elephant foot are turned into a p ...
Brochure on Hispid Hare
... remained scientifically unexplored and the role of many small mammals in the ecosystem is yet to be ascertained. One of the most significant, rare and threatened species of this tropical landscape is the Hispid Hare (In Assamese: Khagorikota Xoha) - an elusive, poorly known Lagomorph that exclusivel ...
... remained scientifically unexplored and the role of many small mammals in the ecosystem is yet to be ascertained. One of the most significant, rare and threatened species of this tropical landscape is the Hispid Hare (In Assamese: Khagorikota Xoha) - an elusive, poorly known Lagomorph that exclusivel ...
Population, community and ecosystem effects of exotic herbivores: A
... Species introductions represent one of the three greatest threats to biodiversity globally; alongside climatic change and habitat loss. Exotic invasive species have been reported to greatly alter native diversity, transforming native ecosystems as well as contributing to the extinction of endangered ...
... Species introductions represent one of the three greatest threats to biodiversity globally; alongside climatic change and habitat loss. Exotic invasive species have been reported to greatly alter native diversity, transforming native ecosystems as well as contributing to the extinction of endangered ...
Trophic promiscuity, intraguild predation and the problem of omnivores
... for pest managers, of course, is a higher pest density as the IG predator comes to dominate the dynamics. Simply put, simple theory tells us that IGP should reduce the suppression of pests by biological control agents. However, empirical studies provide a greater range of outcomes than predicted by ...
... for pest managers, of course, is a higher pest density as the IG predator comes to dominate the dynamics. Simply put, simple theory tells us that IGP should reduce the suppression of pests by biological control agents. However, empirical studies provide a greater range of outcomes than predicted by ...
Reconciliation ecology
Reconciliation ecology is the branch of ecology which studies ways to encourage biodiversity in human-dominated ecosystems. Michael Rosenzweig first articulated the concept in his book Win-Win Ecology, based on the theory that there is not enough area for all of earth’s biodiversity to be saved within designated nature preserves. Therefore, humans should increase biodiversity in human-dominated landscapes. By managing for biodiversity in ways that do not decrease human utility of the system, it is a ""win-win"" situation for both human use and native biodiversity. The science is based in the ecological foundation of human land-use trends and species-area relationships. It has many benefits beyond protection of biodiversity, and there are numerous examples of it around the globe. Aspects of reconciliation ecology can already be found in management legislation, but there are challenges in both public acceptance and ecological success of reconciliation attempts.