The Role of Predation in Wildlife Population Dynamics
... Seip (1992) suggests that one caribou population was slowly increasing because its migratory behavior kept the caribou separated from wolves and moose throughout the year resulting in low wolf predation. Fryxell et al. (1988) postulated that migratory ungulates on the Serengeti may escape predatory ...
... Seip (1992) suggests that one caribou population was slowly increasing because its migratory behavior kept the caribou separated from wolves and moose throughout the year resulting in low wolf predation. Fryxell et al. (1988) postulated that migratory ungulates on the Serengeti may escape predatory ...
Vol. 127, No. 3 The American Naturalist March 1986 SPECIES
... found, the possibility of immigration from either upstream or downstream could be monitored. On each visit, plots were searched three times in succession, thus tripling the effort per unit area. The day searches were dropped and additional night searches substituted, because night searches had been ...
... found, the possibility of immigration from either upstream or downstream could be monitored. On each visit, plots were searched three times in succession, thus tripling the effort per unit area. The day searches were dropped and additional night searches substituted, because night searches had been ...
Experimental evidence that feral cats cause local extirpation of small
... experiment. Rattus villosissimus weighs up to 280 g; females are sexually mature at c. 2 months, have a gestation period of c. 20 days, produce litters of up to nine young and wean pups at c. 21 days old (Breed & Ford 2007). It is a gregarious species and can live at high density under favourable co ...
... experiment. Rattus villosissimus weighs up to 280 g; females are sexually mature at c. 2 months, have a gestation period of c. 20 days, produce litters of up to nine young and wean pups at c. 21 days old (Breed & Ford 2007). It is a gregarious species and can live at high density under favourable co ...
NECTAR TRAITS IN NICOTIANA SECTION ALATAE
... any of these pressures may be constrained by lack of genetic variation in a population genetic sense, a phylogenetic sense, or due to antagonistic pleiotropy. Pollinators are unique in their evolutionary effects on plant traits because they not only contribute to plant fitness, but are also agents o ...
... any of these pressures may be constrained by lack of genetic variation in a population genetic sense, a phylogenetic sense, or due to antagonistic pleiotropy. Pollinators are unique in their evolutionary effects on plant traits because they not only contribute to plant fitness, but are also agents o ...
THE RELATIONSHIP BETWEEN PRODUCTIVITY AND SPECIES
... of existing functional groups. Lawton (102) proposed a model in which species may have strong, idiosyncratic effects on ecosystems. If this is the case, there is no predictable effect of species richness per se on ecosystem function. However, if the properties or functional traits of individual spec ...
... of existing functional groups. Lawton (102) proposed a model in which species may have strong, idiosyncratic effects on ecosystems. If this is the case, there is no predictable effect of species richness per se on ecosystem function. However, if the properties or functional traits of individual spec ...
THE RELATIONSHIP BETWEEN PRODUCTIVITY AND SPECIES
... of existing functional groups. Lawton (102) proposed a model in which species may have strong, idiosyncratic effects on ecosystems. If this is the case, there is no predictable effect of species richness per se on ecosystem function. However, if the properties or functional traits of individual spec ...
... of existing functional groups. Lawton (102) proposed a model in which species may have strong, idiosyncratic effects on ecosystems. If this is the case, there is no predictable effect of species richness per se on ecosystem function. However, if the properties or functional traits of individual spec ...
The macroecology of Southeast-Asian
... My aim of analysing species’ distribution, abundance and the relationship between them made it necessary to also pay attention to patterns of biodiversity and biogeography, which are direct results from these variables, as well as to some methodological issues. Furthermore, additional parameters suc ...
... My aim of analysing species’ distribution, abundance and the relationship between them made it necessary to also pay attention to patterns of biodiversity and biogeography, which are direct results from these variables, as well as to some methodological issues. Furthermore, additional parameters suc ...
Foraging movements and habitat niche of two closely
... Environmental data We used a total of six environmental variables: (i) sea surface temperature (SST, ºC) ...
... Environmental data We used a total of six environmental variables: (i) sea surface temperature (SST, ºC) ...
Link - Conferences and Noncredit Programs
... under the Endangered Species Act. Factors that are thought to cause decline include habitat loss, loss of native fish prey due to invasive species, post-wildfire flooding effects, and water quality. There are few studies done that examine wildfire effects on streams and riparian habitats, specifical ...
... under the Endangered Species Act. Factors that are thought to cause decline include habitat loss, loss of native fish prey due to invasive species, post-wildfire flooding effects, and water quality. There are few studies done that examine wildfire effects on streams and riparian habitats, specifical ...
Traits fonctionnels des arbres : de la plasticité - Archipel
... Schematic of t he experimental design (replicated four times) . Communit ies are implemented along a gradient of species richness (SR) and functional diversity (FD ). Smaller superposed squares indicate t he replication of different communit ies with similar FD resulting in a total of 14 two-sp ecie ...
... Schematic of t he experimental design (replicated four times) . Communit ies are implemented along a gradient of species richness (SR) and functional diversity (FD ). Smaller superposed squares indicate t he replication of different communit ies with similar FD resulting in a total of 14 two-sp ecie ...
Herbivore and Fungal Pathogen Exclusion Affects the Timothy L. Dickson *
... production, and plant performance more broadly, independent or interactive? In the last comprehensive review [28], the most common effect of combined pathogen-herbivore attack on plant performance was sub-additive, with additive effects being next most common, and synergistic and antagonistic effect ...
... production, and plant performance more broadly, independent or interactive? In the last comprehensive review [28], the most common effect of combined pathogen-herbivore attack on plant performance was sub-additive, with additive effects being next most common, and synergistic and antagonistic effect ...
Spatial patterns in European rabbit abundance after a population
... Assessing the associations between spatial patterns in population abundance and environmental heterogeneity is critical for understanding various population processes and for managing species and communities. This study evaluates responses in the abundance of the European rabbit (Oryctolagus cunicul ...
... Assessing the associations between spatial patterns in population abundance and environmental heterogeneity is critical for understanding various population processes and for managing species and communities. This study evaluates responses in the abundance of the European rabbit (Oryctolagus cunicul ...
Salvelinus fontinalis
... to about 4.5 (Grande 1984). It may also grow faster and obtain a better condition and quality than the native brown trout (Salmo trutta) in acid lakes, a trait that has made it attractive for stocking in waters where native species do not thrive or have disappeared (ibid.). Reproduction and lifecycl ...
... to about 4.5 (Grande 1984). It may also grow faster and obtain a better condition and quality than the native brown trout (Salmo trutta) in acid lakes, a trait that has made it attractive for stocking in waters where native species do not thrive or have disappeared (ibid.). Reproduction and lifecycl ...
Landscape Infrastructure and Sustainable Agriculture (LISA)
... Agricultural landscapes in Europe are characterised by a high diversity within many different natural regions and landuse types. In all agricultural landscapes there are examples of nature-friendly landuse and less nature-friendly landuse, and the balance between these two varies considerably betwee ...
... Agricultural landscapes in Europe are characterised by a high diversity within many different natural regions and landuse types. In all agricultural landscapes there are examples of nature-friendly landuse and less nature-friendly landuse, and the balance between these two varies considerably betwee ...
African ungulates recognize a locally extinct native predator
... Large carnivores are typically extinction prone and most continents have suffered dramatic declines in their terrestrial large carnivore fauna (Dalerum et al. 2009). However, some populations have repatriated parts of their historical range, either through natural dispersal or human re-introductions ...
... Large carnivores are typically extinction prone and most continents have suffered dramatic declines in their terrestrial large carnivore fauna (Dalerum et al. 2009). However, some populations have repatriated parts of their historical range, either through natural dispersal or human re-introductions ...
SNPs and Haplotypes
... population BUT most are vanishingly rare Compare 2 haploid genomes: 1 SNP per 1331 bp* *The International SNP Map Working Group, Nature 409:928 - 933 (2001) SNP Discovery and Genotyping Workshop ...
... population BUT most are vanishingly rare Compare 2 haploid genomes: 1 SNP per 1331 bp* *The International SNP Map Working Group, Nature 409:928 - 933 (2001) SNP Discovery and Genotyping Workshop ...
Expression of phosphofructokinase in Neisseria meningitidis
... demand of the cell increases (Blangy et al., 1968). The ATPPFK described above (PFK-1) is broadly distributed in Eukaryota and Bacteria, as indicated by homologous protein sequences and biochemical evidence (Bapteste et al., 2003), and is encoded by the pfkA gene. A second type of ATP-PFK enzyme (PF ...
... demand of the cell increases (Blangy et al., 1968). The ATPPFK described above (PFK-1) is broadly distributed in Eukaryota and Bacteria, as indicated by homologous protein sequences and biochemical evidence (Bapteste et al., 2003), and is encoded by the pfkA gene. A second type of ATP-PFK enzyme (PF ...
Ant Community Dynamics and the Effects of Global Warming
... coexistence. Specifically, I examined coexistence among ant species in eastern deciduous forests and the effects that warming may have on foraging activity. Through a series of field observations, I sought evidence for the importance of four of the most commonly cited mechanisms for coexistence amon ...
... coexistence. Specifically, I examined coexistence among ant species in eastern deciduous forests and the effects that warming may have on foraging activity. Through a series of field observations, I sought evidence for the importance of four of the most commonly cited mechanisms for coexistence amon ...
THE ROLE OF PREDATION IN WILDLIFE POPULATION DYNAMICS
... Ballard 1994). Much of the conhsion arises because predation is only one of many factors influencing prey populations. Growth rates (increasing or decreasing) of prey populations may be affected by habitat changes, severe weather (e.g., deep snow), starvation, diseases, predation, human hunting, com ...
... Ballard 1994). Much of the conhsion arises because predation is only one of many factors influencing prey populations. Growth rates (increasing or decreasing) of prey populations may be affected by habitat changes, severe weather (e.g., deep snow), starvation, diseases, predation, human hunting, com ...
Two novel species of marine phototrophic Gammaproteobacteria
... (1961) and the G+C content (mol%) of the DNA as determined by HPLC (Mesbah et al., ...
... (1961) and the G+C content (mol%) of the DNA as determined by HPLC (Mesbah et al., ...
limiting resources and the regulation of diversity in phytoplankton
... in May, before ice out, and at one main pelagic sampling station in each lake throughout the summer. Collections were made on a weekly basis from both Yellowstone and Jackson Lakes. Samples were collected every 10–12 d in Lewis Lake. Water was sampled by means of a nondestructive peristaltic pump. A ...
... in May, before ice out, and at one main pelagic sampling station in each lake throughout the summer. Collections were made on a weekly basis from both Yellowstone and Jackson Lakes. Samples were collected every 10–12 d in Lewis Lake. Water was sampled by means of a nondestructive peristaltic pump. A ...
Availability of Drift Materials and the Covering Response of the Sea
... sweeps are presented in Table 2. Using the Mann-Whitney U-test, I found a significantly greater (significant to 2.5 percent) amount of drift material present in the surge area as compared with that present in the tidepool area at both 1.5 and 5.8 feet above mean lower low water. There is also a grea ...
... sweeps are presented in Table 2. Using the Mann-Whitney U-test, I found a significantly greater (significant to 2.5 percent) amount of drift material present in the surge area as compared with that present in the tidepool area at both 1.5 and 5.8 feet above mean lower low water. There is also a grea ...
By: Cody Adkins Charlotte Anderson Michelle Barillas Holly Harlin
... of other herbivores and omnivores, such as rabbits (Sylvilagus spp.) and black bears, may decline due to a lack of resources. In an extreme example, on Anticosti Island (a small island located in Quebec, Canada) scientists have documented the disappearance of both berry-producing shrubs and the blac ...
... of other herbivores and omnivores, such as rabbits (Sylvilagus spp.) and black bears, may decline due to a lack of resources. In an extreme example, on Anticosti Island (a small island located in Quebec, Canada) scientists have documented the disappearance of both berry-producing shrubs and the blac ...
Stoichiometry of actual vs. potential predator–prey interactions
... nutrient-poor prey species (Denno & Fagan 2003; Matsumura et al. 2004). These general expectations depend in part on speculation about the functional consequences of interspecific differences in consumer nutrient demand evident in compiled databases of insect stoichiometry (Elser et al. 2000; Sterne ...
... nutrient-poor prey species (Denno & Fagan 2003; Matsumura et al. 2004). These general expectations depend in part on speculation about the functional consequences of interspecific differences in consumer nutrient demand evident in compiled databases of insect stoichiometry (Elser et al. 2000; Sterne ...