Interim koala referral advice for proponents
... A koala population is defined by the capacity of individuals to move from one habitat patch to another. If two groups of koalas are separated by a substantial barrier to movement (e.g. river, mountain range, greater than15 km of cleared rural land or artificial barriers), and there is very little li ...
... A koala population is defined by the capacity of individuals to move from one habitat patch to another. If two groups of koalas are separated by a substantial barrier to movement (e.g. river, mountain range, greater than15 km of cleared rural land or artificial barriers), and there is very little li ...
3 - Heartland Community College
... • Population ecology = investigates the quantitative dynamics of how individuals within a species interact • Community ecology = focuses on interactions among species • Ecosystem ecology = studies living and nonliving components of systems to reveal patterns ...
... • Population ecology = investigates the quantitative dynamics of how individuals within a species interact • Community ecology = focuses on interactions among species • Ecosystem ecology = studies living and nonliving components of systems to reveal patterns ...
Advective supply and loss of
... • How long will animals in the deep GOM waters remain in the GOM, i.e. what is the residence time of the deep water? • To what extent does the deep-water flow move the basin populations to other basins? • Do some basins retain diapausers more efficiently than others? • How sensitive are the answers ...
... • How long will animals in the deep GOM waters remain in the GOM, i.e. what is the residence time of the deep water? • To what extent does the deep-water flow move the basin populations to other basins? • Do some basins retain diapausers more efficiently than others? • How sensitive are the answers ...
IUCN Species Survival Commission
... Humans have moved organisms between sites for their own purposes for millennia. This has yielded benefits for human kind, but in some cases has led to disastrous impacts. IUCN stated its perspective on such moves with its 1987 Position Statement on the Translocation of Living Organisms. Subsequently ...
... Humans have moved organisms between sites for their own purposes for millennia. This has yielded benefits for human kind, but in some cases has led to disastrous impacts. IUCN stated its perspective on such moves with its 1987 Position Statement on the Translocation of Living Organisms. Subsequently ...
Gray Ratsnake (Elaphe spiloides) - Registre public des espèces en
... estimates, the Great Lakes/St. Lawrence population has been estimated to contain between 25 000 – 85 000 individuals. Although no population-wide census information is available, 2 populations on the Frontenac Axis were shown to be declining slightly over an 18-year period. No demographic sampling h ...
... estimates, the Great Lakes/St. Lawrence population has been estimated to contain between 25 000 – 85 000 individuals. Although no population-wide census information is available, 2 populations on the Frontenac Axis were shown to be declining slightly over an 18-year period. No demographic sampling h ...
Bioeconomics and biodiversity in harvested metacommunities: a
... when plotting diversity versus profit. One objective of this study is to characterize and understand how biotic interactions influence the shape of these trade-off curves. Table 1 details the relevant quantities that we calculate in our two illustrative models. ...
... when plotting diversity versus profit. One objective of this study is to characterize and understand how biotic interactions influence the shape of these trade-off curves. Table 1 details the relevant quantities that we calculate in our two illustrative models. ...
Population size and the risk of local extinction: empirical evidence
... negative effects of small population size on survival. In contrast, Husband and Barrett (1996) found no such relationship in Eichhornia paniculata, an aquatic plant of ephemeral pools in north-east Brazil, which they attributed to the frequent catastrophic changes in local environmental conditions t ...
... negative effects of small population size on survival. In contrast, Husband and Barrett (1996) found no such relationship in Eichhornia paniculata, an aquatic plant of ephemeral pools in north-east Brazil, which they attributed to the frequent catastrophic changes in local environmental conditions t ...
Viewpoint: A theoretical basis for planning woody plant control to
... those created by mechanical woody plant control, attracts passerines but the bids experience greater nest parasitism and predation in edge habitats (Gates and Gysel 1978, Reese and Ratti 1988, Noss and Cooperrider 1994). Reese and Ratti (1988) speculated that predation rates may be high in early suc ...
... those created by mechanical woody plant control, attracts passerines but the bids experience greater nest parasitism and predation in edge habitats (Gates and Gysel 1978, Reese and Ratti 1988, Noss and Cooperrider 1994). Reese and Ratti (1988) speculated that predation rates may be high in early suc ...
The ecology of recovery
... traits are density-dependent. For example, populations recovering from previous exploitation will contain individuals of smaller size-at-age than when exploited, due to density-dependent body growth (Fabrizio et al. 2001; A. Gårdmark et al. unpubl.), common in, for example, exploited fish population ...
... traits are density-dependent. For example, populations recovering from previous exploitation will contain individuals of smaller size-at-age than when exploited, due to density-dependent body growth (Fabrizio et al. 2001; A. Gårdmark et al. unpubl.), common in, for example, exploited fish population ...
Foraging efficiency of Akodon azarae under different plant cover and
... hand, GUDs can be compared between related situations despite different densities when the same number of individuals have access to the different types of foraging patches (Ziv et al. 1995). Akodon azarae is a crepuscular nocturnal cricetide rodent (adult average weight 25 g) that inhabits Pampean ...
... hand, GUDs can be compared between related situations despite different densities when the same number of individuals have access to the different types of foraging patches (Ziv et al. 1995). Akodon azarae is a crepuscular nocturnal cricetide rodent (adult average weight 25 g) that inhabits Pampean ...
Interactions of components of habitats alter composition and
... to clarify differences between the effects of different structural characteristics of habitat (Downes et al. 1998). The two major factors are complexity and heterogeneity, the influences of which depend on the scale at which they are measured (McCoy & Bell 1991). Complexity is measured as the total ...
... to clarify differences between the effects of different structural characteristics of habitat (Downes et al. 1998). The two major factors are complexity and heterogeneity, the influences of which depend on the scale at which they are measured (McCoy & Bell 1991). Complexity is measured as the total ...
– 35 – MODELLING THE DISTRIBUTION OF THE EUROPEAN
... that it avoids pine forests. The size of the home range for several Polecat populations has been estimated throughout its distribution area. Generally, home range size varies between 0.42 and 4.3 km2 (Nilsson, 1978; Blandford, 1987; Brzezinski et al., 1992; Lodé, 1993b; Baghli & Verhagen, 2004). On ...
... that it avoids pine forests. The size of the home range for several Polecat populations has been estimated throughout its distribution area. Generally, home range size varies between 0.42 and 4.3 km2 (Nilsson, 1978; Blandford, 1987; Brzezinski et al., 1992; Lodé, 1993b; Baghli & Verhagen, 2004). On ...
Director Species Listing Section Threatened Species Scientific
... In Victoria, populations on the mainland are not officially listed as threatened due to the fact that several populations are at high densities. Nevertheless, they face the same habitat loss threats as in other states. In contrast, the nomination identifies koala populations as a current and future ...
... In Victoria, populations on the mainland are not officially listed as threatened due to the fact that several populations are at high densities. Nevertheless, they face the same habitat loss threats as in other states. In contrast, the nomination identifies koala populations as a current and future ...
a first population assessment of black oystercatcher haematopus
... and the frequency of detections is shown in Table 1. An estimate of 1 160 Black Oystercatchers is likely to be less than the true number of birds in surveyed areas; the detection rate using this protocol has been calculated to be ~69% (Lyons et al. 2012), and observers frequently reported difficulti ...
... and the frequency of detections is shown in Table 1. An estimate of 1 160 Black Oystercatchers is likely to be less than the true number of birds in surveyed areas; the detection rate using this protocol has been calculated to be ~69% (Lyons et al. 2012), and observers frequently reported difficulti ...
Meadow viper Vipera ursinii
... and may now be major threats in areas where at least the habitat is safeguarded. • Habitat destruction: This has been particularly important in lowland populations, where most of the suitable habitat is now converted to agricultural monocultures or forestry plantations. Large areas of habitat have a ...
... and may now be major threats in areas where at least the habitat is safeguarded. • Habitat destruction: This has been particularly important in lowland populations, where most of the suitable habitat is now converted to agricultural monocultures or forestry plantations. Large areas of habitat have a ...
Predicting Distribution, Habitat Suitability and the Potential Loss of
... Forest fragmentation and loss of forested habitats constitute some of the greatest threats to faunal biodiversity and are primary contributors to species extinctions in many developing countries. Specifically, it has been repeatedly documented that deforestation and habitat fragmentation adversely a ...
... Forest fragmentation and loss of forested habitats constitute some of the greatest threats to faunal biodiversity and are primary contributors to species extinctions in many developing countries. Specifically, it has been repeatedly documented that deforestation and habitat fragmentation adversely a ...
population density
... a deer’s habitat if the density of the deer population decreases over a given time. What is that resources may be depleted or community may have changed due to arrival of a new predator Continue ...
... a deer’s habitat if the density of the deer population decreases over a given time. What is that resources may be depleted or community may have changed due to arrival of a new predator Continue ...
Blue-winged Teal Blue-winged Teal Minnesota Conservation
... teal do not arrive on surveyed areas until after counts are conducted (Waterfowl Mgmt Handbook). In addition, significant proportions of the blue-winged teal breeding population may occupy locations outside the surveyed area, particularly in years when habitat conditions are poor in the Prairie Re ...
... teal do not arrive on surveyed areas until after counts are conducted (Waterfowl Mgmt Handbook). In addition, significant proportions of the blue-winged teal breeding population may occupy locations outside the surveyed area, particularly in years when habitat conditions are poor in the Prairie Re ...
PDF, 704KB - Conservation Biology
... The availability of food and shelter are the two most important factors affecting a hare’s habitat use (Bisi et al. 2013; Hewson and Hinge 1990; Hiltunen et al. 2004; Hulbert et al. 1996; Keith and Windberg 1978; Nodari 2006; Pehrson and Lindlöf 1984; Wolff 1980). Previous studies have shown that th ...
... The availability of food and shelter are the two most important factors affecting a hare’s habitat use (Bisi et al. 2013; Hewson and Hinge 1990; Hiltunen et al. 2004; Hulbert et al. 1996; Keith and Windberg 1978; Nodari 2006; Pehrson and Lindlöf 1984; Wolff 1980). Previous studies have shown that th ...
5–2 Limits to Growth
... Environments are always changing, and most populations can adapt to a certain amount of change. Populations often grow and shrink in response to such changes. Major upsets in an ecosystem, however, can lead to long-term declines in certain populations. Human activities have caused some of these majo ...
... Environments are always changing, and most populations can adapt to a certain amount of change. Populations often grow and shrink in response to such changes. Major upsets in an ecosystem, however, can lead to long-term declines in certain populations. Human activities have caused some of these majo ...
HUMAN POPULATION ISSUES
... to grow, the birthrate must exceed the death rate for a period of time. These three human populations illustrate how the combined effects of births and deaths would change population size if birthrates and death rates were maintained for a five-year period. ...
... to grow, the birthrate must exceed the death rate for a period of time. These three human populations illustrate how the combined effects of births and deaths would change population size if birthrates and death rates were maintained for a five-year period. ...
Soil nutrient status determines how elephant utilize trees and shape
... spatial scales at which the environment is perceived, where ‘grain’ is the smallest scale and ‘extent’ the largest scale, of heterogeneity to which a herbivore responds to patch structure (Kotliar & Wiens 1990). Given that boundaries between the subunits within different hierarchical scales should b ...
... spatial scales at which the environment is perceived, where ‘grain’ is the smallest scale and ‘extent’ the largest scale, of heterogeneity to which a herbivore responds to patch structure (Kotliar & Wiens 1990). Given that boundaries between the subunits within different hierarchical scales should b ...
Has the ghost of competition passed?
... Now consider the southeast quadrant to the right and below the absolute isoleg of species 2. Species 1 occupies its preferred habitat only; species 2 occupies both. The maximum competitive effect of species 2 on species 1 is α. The proportion of individuals of species 2 occupying habitat A increases ...
... Now consider the southeast quadrant to the right and below the absolute isoleg of species 2. Species 1 occupies its preferred habitat only; species 2 occupies both. The maximum competitive effect of species 2 on species 1 is α. The proportion of individuals of species 2 occupying habitat A increases ...
What`s Inside . . . Controlling Predators, or Controlling Predation?
... and Predation As these questions indicate, separating predation from habitat quality is not easy. Therefore, we set out to test one against the other during a four-year study. Research by Marc Puckett showed that field borders along drainage ditches in the Alligator River National Wildlife Refuge at ...
... and Predation As these questions indicate, separating predation from habitat quality is not easy. Therefore, we set out to test one against the other during a four-year study. Research by Marc Puckett showed that field borders along drainage ditches in the Alligator River National Wildlife Refuge at ...
Conservation of Native Biodiversity in the City
... Emlen 1974). But beyond these generalizations, birds react in different ways to the dominant feature of urbanization — fragmentation. The following discussion should not detract from the well-established tenet of conservation biology that conservation of the full complement of bird species within a ...
... Emlen 1974). But beyond these generalizations, birds react in different ways to the dominant feature of urbanization — fragmentation. The following discussion should not detract from the well-established tenet of conservation biology that conservation of the full complement of bird species within a ...