Grey-crowned Babbler
... significantly prone to future threats likely to result in extinction; and ...
... significantly prone to future threats likely to result in extinction; and ...
california red-legged frog - Solano County Water Agency
... breeding. Non-dispersing individuals were those residing at any particular aquatic site but made short-range forays into upland habitats. Movement Patterns of Dispersing Individuals. During periods of wet weather, starting with the first rains of fall, frogs have been observed making overland excurs ...
... breeding. Non-dispersing individuals were those residing at any particular aquatic site but made short-range forays into upland habitats. Movement Patterns of Dispersing Individuals. During periods of wet weather, starting with the first rains of fall, frogs have been observed making overland excurs ...
Abstract Book
... planton which states that in equilibrium the number of coexisting species can not exceed the number of ressources. We study a competition model similar to the one introduced by Huisman and Weissing who showed that coexistence of more species than ressources becomes possible in non-equilibrium states ...
... planton which states that in equilibrium the number of coexisting species can not exceed the number of ressources. We study a competition model similar to the one introduced by Huisman and Weissing who showed that coexistence of more species than ressources becomes possible in non-equilibrium states ...
Status, Basic Ecology and Conservation of Capercaillie
... apparently discrete groups of birds using separate blocks are linked with nearby groups through emigration and immigration, forming what are called metapopulations. In capercaillie, hens tend to disperse further than cocks. Studies on radio-tagged birds in Deeside showed that the average natal dispe ...
... apparently discrete groups of birds using separate blocks are linked with nearby groups through emigration and immigration, forming what are called metapopulations. In capercaillie, hens tend to disperse further than cocks. Studies on radio-tagged birds in Deeside showed that the average natal dispe ...
SPECIES ACCOUNT – MOOSE (m-alal)
... Winter range can include clearcut areas as well as forested sites. Moose browse tends to be most abundant in natural openings as well as those areas that have been recently disturbed through fire or clearcut logging. As such, structural stage is an important variable which is strongly correlated wit ...
... Winter range can include clearcut areas as well as forested sites. Moose browse tends to be most abundant in natural openings as well as those areas that have been recently disturbed through fire or clearcut logging. As such, structural stage is an important variable which is strongly correlated wit ...
Appendix F - Wetlands
... THREATS: Blanding’s Turtles are particularly vulnerable because they travel very long distances during their active season, do not reproduce until late in life (14-20 yrs), and have low nest and juvenile survivorship. These traits make them extremely sensitive to even a 1-2% increase in adult mortal ...
... THREATS: Blanding’s Turtles are particularly vulnerable because they travel very long distances during their active season, do not reproduce until late in life (14-20 yrs), and have low nest and juvenile survivorship. These traits make them extremely sensitive to even a 1-2% increase in adult mortal ...
Theory meets reality: How habitat fragmentation research has
... relationships is a litmus test for IBT (Gilbert, 1980; Abbott, 1983) because other biogeographic phenomena, such as the species-area relationship, can arise for reasons aside from those hypothesized by IBT (for example, higher habitat diversity, rather than lower extinction rates, can cause species ...
... relationships is a litmus test for IBT (Gilbert, 1980; Abbott, 1983) because other biogeographic phenomena, such as the species-area relationship, can arise for reasons aside from those hypothesized by IBT (for example, higher habitat diversity, rather than lower extinction rates, can cause species ...
Jaguarundi CH Petition Backup
... occurring in the U.S. portion of the Jaguarundi’s range. Human population growth within this wildcat’s range is a driver of continued loss of habitat to agriculture and development. Border installations and related activity further degrade and fragment its habitat, as well as dividing small U.S. pop ...
... occurring in the U.S. portion of the Jaguarundi’s range. Human population growth within this wildcat’s range is a driver of continued loss of habitat to agriculture and development. Border installations and related activity further degrade and fragment its habitat, as well as dividing small U.S. pop ...
The Green and Golden Bell Frog Key Populations in the Lower Hunter
... likely preclude interconnection and migration with the populations at Sandgate and any to the north in the Tomago wetlands. Furthermore, given the small size and poor measures of viability of the other remnant populations in the Hunter catchment, the GGBF population on Kooragang Island by comparison ...
... likely preclude interconnection and migration with the populations at Sandgate and any to the north in the Tomago wetlands. Furthermore, given the small size and poor measures of viability of the other remnant populations in the Hunter catchment, the GGBF population on Kooragang Island by comparison ...
Population limitation in migrants - Global Raptor Information Network
... In a few such species, the effects of potential limiting factors have been confirmed locally by experiment. In theory, population sizes might also be limited by severe competition at restricted stopover sites, where bird densities are often high and food supplies heavily depleted, but (with one stri ...
... In a few such species, the effects of potential limiting factors have been confirmed locally by experiment. In theory, population sizes might also be limited by severe competition at restricted stopover sites, where bird densities are often high and food supplies heavily depleted, but (with one stri ...
J F MAMMALS OF THE FREEMAN RANCH, HAYS COUNTY, TEXAS
... structure generally center on domestic livestock, insects and small mammals may be the most important grazers in some communities. By cropping grass to a short height, jackrabbits (Lepus) and prairie dogs (Cynomys) cause structural and compositional changes to the plant community of prairies. The ef ...
... structure generally center on domestic livestock, insects and small mammals may be the most important grazers in some communities. By cropping grass to a short height, jackrabbits (Lepus) and prairie dogs (Cynomys) cause structural and compositional changes to the plant community of prairies. The ef ...
New Zealand Journal of Forestry Science
... (both sparse and abundant) are affected by stochastic abiotic effects (e.g. variation in weather conditions), but low-density populations are particularly influenced by such effects. In addition to environmental stochasticity, sparse populations may be strongly affected by demographic stochasticity ...
... (both sparse and abundant) are affected by stochastic abiotic effects (e.g. variation in weather conditions), but low-density populations are particularly influenced by such effects. In addition to environmental stochasticity, sparse populations may be strongly affected by demographic stochasticity ...
Document
... Ocean iron fertilization experiments enable the quantitative study of processes shaping the structure and functioning of pelagic ecosystems following perturbation under in situ conditions. EIFEX was conducted within a stationary eddy adjacent to the Antarctic Polar Front over 38 days in February/Mar ...
... Ocean iron fertilization experiments enable the quantitative study of processes shaping the structure and functioning of pelagic ecosystems following perturbation under in situ conditions. EIFEX was conducted within a stationary eddy adjacent to the Antarctic Polar Front over 38 days in February/Mar ...
Reddish Egret Plan - Gulf Coast Joint Venture
... While some predation is expected at colonial waterbird nesting sites, in certain situations predation can significantly impact colony productivity or lead to colony abandonment. Colonial waterbirds choose islands and other similar isolated habitats where certain types of predators are typically abse ...
... While some predation is expected at colonial waterbird nesting sites, in certain situations predation can significantly impact colony productivity or lead to colony abandonment. Colonial waterbirds choose islands and other similar isolated habitats where certain types of predators are typically abse ...
Designing marine reserves for interacting species: Insights
... the inclusion of species interactions as a critical gap in marine reserve theory. In addition to primarily being singlespecies models, the existing theoretical investigations often focus on the implications of reserve establishment for fisheries outside protected areas (Gerber et al., 2003). On the ...
... the inclusion of species interactions as a critical gap in marine reserve theory. In addition to primarily being singlespecies models, the existing theoretical investigations often focus on the implications of reserve establishment for fisheries outside protected areas (Gerber et al., 2003). On the ...
Caso, A. (2011). Status of Jaguars in the State of Tamaulipas. In
... cleared for agriculture, with several highways. This represents a major barrier for the jaguar and suggests that the populations are isolated. In the Sierra Madre Oriental, most records were obtained in the south, in the municipalities of Llera, Ocampo and Jaumave. There was one direct sighting in E ...
... cleared for agriculture, with several highways. This represents a major barrier for the jaguar and suggests that the populations are isolated. In the Sierra Madre Oriental, most records were obtained in the south, in the municipalities of Llera, Ocampo and Jaumave. There was one direct sighting in E ...
Management Plan `The Green and Golden Bell Frog Key Population
... managed and monitored such that the species continues to persist at the location and measures of the population’s viability are maintained or improved over time. Other outlying population elements are also incorporated into the scope of this plan. The purpose of this Management Plan is: 1. To identi ...
... managed and monitored such that the species continues to persist at the location and measures of the population’s viability are maintained or improved over time. Other outlying population elements are also incorporated into the scope of this plan. The purpose of this Management Plan is: 1. To identi ...
important considerations for the management of demersal fisheries
... Many temperate groundfish species move freely between habitats and are assumed to select areas of the seabed that best meet their requirements at the time. Hence, they meet some of the basic prerequisites of IFD theory: if all competitors are equal and free to enter and leave an area, individuals wi ...
... Many temperate groundfish species move freely between habitats and are assumed to select areas of the seabed that best meet their requirements at the time. Hence, they meet some of the basic prerequisites of IFD theory: if all competitors are equal and free to enter and leave an area, individuals wi ...
A hierarchical view of habitat and its relationship to species
... average, have higher peaks and higher mean densities. The assumption of curve similarity lacks an ecological justification. In contrast, curves may display a variety of shapes, with distinct plateau regions where densities would neither increase nor decrease significantly (see figure 4.2b). Furtherm ...
... average, have higher peaks and higher mean densities. The assumption of curve similarity lacks an ecological justification. In contrast, curves may display a variety of shapes, with distinct plateau regions where densities would neither increase nor decrease significantly (see figure 4.2b). Furtherm ...
Large, natural blocks of mature woodland habitat within
... habitat are different within an ecodistrict compared to the remainder of an ecoregion or if a habitat only occurs within a restricted area of the ecoregion. The Schedules, including description of wildlife habitat, wildlife species, and the criteria provided for determining SWH, are based on science ...
... habitat are different within an ecodistrict compared to the remainder of an ecoregion or if a habitat only occurs within a restricted area of the ecoregion. The Schedules, including description of wildlife habitat, wildlife species, and the criteria provided for determining SWH, are based on science ...
Durham Research Online
... The functional morphological adaptations of the postcranial skeleton can be powerful indicators of locomotion and habitat exploitation. For fossil species whose behaviour cannot be observed directly, identifying such adaptations and linking them to habitat are important aspects of paleobiological re ...
... The functional morphological adaptations of the postcranial skeleton can be powerful indicators of locomotion and habitat exploitation. For fossil species whose behaviour cannot be observed directly, identifying such adaptations and linking them to habitat are important aspects of paleobiological re ...
polychaete Capitella capitata (Type I): their cause
... takes place at a sufficiently high rate, the time it takes for food limitation to act as a density-independent factor (shutting down reproduction) represents a significant time delay as well. The effect of these delays in the negative feedback mechanism would be especially important for continuously ...
... takes place at a sufficiently high rate, the time it takes for food limitation to act as a density-independent factor (shutting down reproduction) represents a significant time delay as well. The effect of these delays in the negative feedback mechanism would be especially important for continuously ...
Mine area - Conservation Significant fauna and habitat
... (Braithwaite and Griffiths 1994), so that the species is now restricted to the Pilbara and northern Kimberley in Western Australia, and to a few discrete populations across the Northern Territory and eastern Queensland. Populations of the Northern Quoll have been lost from most of the north-eastern ...
... (Braithwaite and Griffiths 1994), so that the species is now restricted to the Pilbara and northern Kimberley in Western Australia, and to a few discrete populations across the Northern Territory and eastern Queensland. Populations of the Northern Quoll have been lost from most of the north-eastern ...
View PDF - International Association for Bear Research
... at any one time. Most day beds used by grizzly bears Bears must substitutefor scarce items. A particularly are found in timber stands, even at times when bears favored site under periods of average or greater food are commonly observed foraging in the open. supply may attract and serve several bears ...
... at any one time. Most day beds used by grizzly bears Bears must substitutefor scarce items. A particularly are found in timber stands, even at times when bears favored site under periods of average or greater food are commonly observed foraging in the open. supply may attract and serve several bears ...
Inertia: the discrepancy between individual and common good in
... it with population growth rate (Frank & Slatkin, 1992), mainly because populations at density-dependent equilibrium have a long-term average growth rate of zero. Population-level performance has been measured e.g. using the total number of individuals in the entire metapopulation at equilibrium (e.g ...
... it with population growth rate (Frank & Slatkin, 1992), mainly because populations at density-dependent equilibrium have a long-term average growth rate of zero. Population-level performance has been measured e.g. using the total number of individuals in the entire metapopulation at equilibrium (e.g ...