Prey abundance and habitat use by migratory shorebirds
... stopover areas (Myers et al. 1987), but there are few areas that have the right combination of resources (Morrison and Harrington 1979). In some cases, between 50% and 80% of entire migrating populations of shorebirds (i.e., all individuals of a species migrating from a specific geographic region) u ...
... stopover areas (Myers et al. 1987), but there are few areas that have the right combination of resources (Morrison and Harrington 1979). In some cases, between 50% and 80% of entire migrating populations of shorebirds (i.e., all individuals of a species migrating from a specific geographic region) u ...
ASET postprint
... Gause and by T. Park (see Kingsland 1985 for an historical account and for references), competition theory was brought into center stage by G.E. Hutchinson's theoretical considerations on the conditions of coexistence of competing species in their ecological niches. As Hutchinson's presentation has ...
... Gause and by T. Park (see Kingsland 1985 for an historical account and for references), competition theory was brought into center stage by G.E. Hutchinson's theoretical considerations on the conditions of coexistence of competing species in their ecological niches. As Hutchinson's presentation has ...
Ecological and evolutionary consequences of size
... humans is therefore a source of extrinsic mortality where the larger size classes experience higher harvest mortality than the smaller size classes. Although any increase in total mortality rate is expected to have an influence on life-history traits (Stearns 1992; Conover 2000), the response is lik ...
... humans is therefore a source of extrinsic mortality where the larger size classes experience higher harvest mortality than the smaller size classes. Although any increase in total mortality rate is expected to have an influence on life-history traits (Stearns 1992; Conover 2000), the response is lik ...
Competition Within and Between Species of Parasitoid Wasps
... Judy Guinan received her Ph.D. in Ecology from the University of Georgia in 2000. She was awarded UGA’s Excellence in Teaching award in 1999. She is an Assistant Professor of Biology and Director of the Radford University Environmental Center. She has taught Introductory Biology, Ecology, Evolution, ...
... Judy Guinan received her Ph.D. in Ecology from the University of Georgia in 2000. She was awarded UGA’s Excellence in Teaching award in 1999. She is an Assistant Professor of Biology and Director of the Radford University Environmental Center. She has taught Introductory Biology, Ecology, Evolution, ...
A horizon scanning assessment of current and potential future
... and potential future issues facing migratory shorebirds (Charadriiformes). We have chosen this taxonomic group of almost 200 species because: (1) they are found throughout the world, and include some of the longest-distance migratory species that may therefore be at risk from conservation threats gl ...
... and potential future issues facing migratory shorebirds (Charadriiformes). We have chosen this taxonomic group of almost 200 species because: (1) they are found throughout the world, and include some of the longest-distance migratory species that may therefore be at risk from conservation threats gl ...
Preface Introducing the reed warblers 3 Habitat characteristics
... The case of Seychelles Warblers Extra-pair paternity and the benefits of helping Benefits for dominant birds and offspring sex ratio Formation of families and grandparent helpers Other acrocephaiids 5 Polygyny ...
... The case of Seychelles Warblers Extra-pair paternity and the benefits of helping Benefits for dominant birds and offspring sex ratio Formation of families and grandparent helpers Other acrocephaiids 5 Polygyny ...
Spatial dynamics of Norwegian tetraonid populations
... intraspecific synchrony decrease with distance between the populations? Neighbouring or overlapping populations are likely to be affected by the same weather regime, have a relatively high exchange probability (i.e. dispersal) and share a similar predator-guild. On the basis of this, we expect ecologi ...
... intraspecific synchrony decrease with distance between the populations? Neighbouring or overlapping populations are likely to be affected by the same weather regime, have a relatively high exchange probability (i.e. dispersal) and share a similar predator-guild. On the basis of this, we expect ecologi ...
Nevada Wildlife Action Plan - Nevada Department of Wildlife
... With a few noteworthy exceptions, birds in Nevada tend to be distributed at low densities across the landscape. This distribution is probably a reflection of food resources, which likewise tend to be rather widely dispersed in the Great Basin and Mojave Deserts. The exception to this generality usua ...
... With a few noteworthy exceptions, birds in Nevada tend to be distributed at low densities across the landscape. This distribution is probably a reflection of food resources, which likewise tend to be rather widely dispersed in the Great Basin and Mojave Deserts. The exception to this generality usua ...
Landscape modification and habitat fragmentation: a
... Habitat sub-division is the breaking apart of continuous habitat into multiple patches; it is synonymous with what some authors have termed ‘fragmentation’ (Fahrig, 2003). Smaller habitat patches can lead to population declines (Bender et al., 1998), for example because resources in smaller patches ...
... Habitat sub-division is the breaking apart of continuous habitat into multiple patches; it is synonymous with what some authors have termed ‘fragmentation’ (Fahrig, 2003). Smaller habitat patches can lead to population declines (Bender et al., 1998), for example because resources in smaller patches ...
The DNA of coral reef biodiversity: predicting and protecting genetic
... Investigating patterns of genetic diversity at the community level can be framed by tests of foundational theory on drivers of biodiversity. Theory predicts that physical area constrains diversity by limiting carrying capacity and the genetic ‘effective’ population size, while immigration boosts div ...
... Investigating patterns of genetic diversity at the community level can be framed by tests of foundational theory on drivers of biodiversity. Theory predicts that physical area constrains diversity by limiting carrying capacity and the genetic ‘effective’ population size, while immigration boosts div ...
... Abstract.- The ampithoids are benthic amphipods that are related to algae in shallow water. The aim of the present study was to determine, for the first time, the relationship between the size of Pseudamphithoides bacescui and the size of the leaves of algae used for the construction of the shelter ...
Are there general laws in parasite community - MiVEGEC
... 1998a). Local communities like those of macroparasites in fish populations or microbes in human populations assemble themselves from this regional pool through a series of filters (see Fig. 2.1). Differences in host population size and density or the spatial arrangement of host population habitat pa ...
... 1998a). Local communities like those of macroparasites in fish populations or microbes in human populations assemble themselves from this regional pool through a series of filters (see Fig. 2.1). Differences in host population size and density or the spatial arrangement of host population habitat pa ...
stc7_15_draft_ssap_sociable_lapwing_0
... A detailed study on habitat selection and use in Kazakhstan has been conducted recently (Kamp et al. 2009). Across the breeding range, Sociable Lapwings are strongly associated with domestic livestock (especially cattle, sheep and goats), as large grazers create suitable habitat conditions. Grazing ...
... A detailed study on habitat selection and use in Kazakhstan has been conducted recently (Kamp et al. 2009). Across the breeding range, Sociable Lapwings are strongly associated with domestic livestock (especially cattle, sheep and goats), as large grazers create suitable habitat conditions. Grazing ...
Lowland Woodland Fauna - Environment, Planning and Sustainable
... alter ecosystem processes, which may adversely affect the health of the ecosystem. Some of the factors now contributing to the decline of ecosystem health in temperate eucalypt woodlands have been outlined in Chapter 2. The well-known phenomenon of rural tree dieback is a notable example of an alter ...
... alter ecosystem processes, which may adversely affect the health of the ecosystem. Some of the factors now contributing to the decline of ecosystem health in temperate eucalypt woodlands have been outlined in Chapter 2. The well-known phenomenon of rural tree dieback is a notable example of an alter ...
Fulltext PDF - Indian Academy of Sciences
... populations produced by the hybridization of native Japanese macaques and introduced Taiwanese macaques has been a cause of much concern, and governmental efforts have been launched to eliminate such populations (Kawamoto et al. 2001; Kawamoto 2005). Similarly, hybrid macaques are also known to occu ...
... populations produced by the hybridization of native Japanese macaques and introduced Taiwanese macaques has been a cause of much concern, and governmental efforts have been launched to eliminate such populations (Kawamoto et al. 2001; Kawamoto 2005). Similarly, hybrid macaques are also known to occu ...
evolution of old and new world migration systems
... niches in stable, Tropical habitats (Robinson et al. 1988). We know now, however, that migrants winter in nearly every Tropical habitat type, primary as well as secondary, undisturbed as well as disturbed (Moreau 1972; McClure 1974; Rappole 1995), though the relative numbers of migrants and resident ...
... niches in stable, Tropical habitats (Robinson et al. 1988). We know now, however, that migrants winter in nearly every Tropical habitat type, primary as well as secondary, undisturbed as well as disturbed (Moreau 1972; McClure 1974; Rappole 1995), though the relative numbers of migrants and resident ...
2013-2023 Strategic Plan
... alone, many species are at risk; more than 500 are believed to be extinct already. Narrow-minded and outdated policies are undermining accomplishments like the re-establishment of top predators on landscapes they once roamed freely. And new threats to biodiversity such as climate change are evolving ...
... alone, many species are at risk; more than 500 are believed to be extinct already. Narrow-minded and outdated policies are undermining accomplishments like the re-establishment of top predators on landscapes they once roamed freely. And new threats to biodiversity such as climate change are evolving ...
Species-specific positive effects in an annual plant
... on the importance of non-random species loss within systems, and indirect, shifting, or unexpected interactions among species is best tested by absence of relative effects and not presence (Diaz et al. 2003). Another advantage of removing species is that it can be applied repeatedly within a growing ...
... on the importance of non-random species loss within systems, and indirect, shifting, or unexpected interactions among species is best tested by absence of relative effects and not presence (Diaz et al. 2003). Another advantage of removing species is that it can be applied repeatedly within a growing ...
- Wiley Online Library
... structuring a highly diverse (>100 species) semi-arid grassland plant community, testing for positive and negative interactions at different stages of population growth of all species. 3. During the colonization of new patches, most species were facilitated or inhibited by several others. These oppo ...
... structuring a highly diverse (>100 species) semi-arid grassland plant community, testing for positive and negative interactions at different stages of population growth of all species. 3. During the colonization of new patches, most species were facilitated or inhibited by several others. These oppo ...
Patterns of among- and within-species variation in
... evaluate their relative importance in determining patterns of HP receipt across species (see Fang and Huang, 2013). Furthermore, for species visited by generalist pollinators, the floral neighborhood can also be important in influencing patterns of HP receipt (Rathcke, 1983; Feinsinger et al., 1986) ...
... evaluate their relative importance in determining patterns of HP receipt across species (see Fang and Huang, 2013). Furthermore, for species visited by generalist pollinators, the floral neighborhood can also be important in influencing patterns of HP receipt (Rathcke, 1983; Feinsinger et al., 1986) ...
Strategies to Protect Biological Diversity and the
... and the distribution of genetic diversity into conservation planning and priority setting for populations within species and for biogeographic areas within regions. Separation of genetic diversity into two dimensions, one concerned with adaptive variation and the other with neutral divergence caused ...
... and the distribution of genetic diversity into conservation planning and priority setting for populations within species and for biogeographic areas within regions. Separation of genetic diversity into two dimensions, one concerned with adaptive variation and the other with neutral divergence caused ...
Strategies to Protect Biological Diversity and the
... and the distribution of genetic diversity into conservation planning and priority setting for populations within species and for biogeographic areas within regions. Separation of genetic diversity into two dimensions, one concerned with adaptive variation and the other with neutral divergence caused ...
... and the distribution of genetic diversity into conservation planning and priority setting for populations within species and for biogeographic areas within regions. Separation of genetic diversity into two dimensions, one concerned with adaptive variation and the other with neutral divergence caused ...
Guns, Germs and Steel
... been progressive cultures and others that show almost no signs of change. The latter are to be found in areas of high isolation: the former have been favored by the nature and location of heir homelands. The parallel to biologic evolution is significant. Invention begins by small increments of insig ...
... been progressive cultures and others that show almost no signs of change. The latter are to be found in areas of high isolation: the former have been favored by the nature and location of heir homelands. The parallel to biologic evolution is significant. Invention begins by small increments of insig ...
Trophically Unique Species Are Vulnerable to Cascading Extinction Linköping University Postprint
... Quince et al. 2005; Eklöf and Ebenman 2006). The trophic position of the primary extinction is also important but tends to interact with connectance. In sparsely connected communities, extinction of a top predator is less likely to cause secondary extinctions than extinction of a basal species (Bor ...
... Quince et al. 2005; Eklöf and Ebenman 2006). The trophic position of the primary extinction is also important but tends to interact with connectance. In sparsely connected communities, extinction of a top predator is less likely to cause secondary extinctions than extinction of a basal species (Bor ...
Biological and ecological traits of marine species
... species’ place in the food web and body size. The value of biodiversity to society is being quantified in terms of ecosystem goods and services, with the species’ importance being dependent on their functional role in the ecosystems. Conservation biologists conduct species extinction risk assessment ...
... species’ place in the food web and body size. The value of biodiversity to society is being quantified in terms of ecosystem goods and services, with the species’ importance being dependent on their functional role in the ecosystems. Conservation biologists conduct species extinction risk assessment ...