Status of the Black-throated Green Warbler in Alberta
... areas. This report summarizes available information on the Black-throated Green Warbler, as a step towards updating the status of this species in the province. The Black-throated Green Warbler is a neotropical migrant that breeds in the Boreal and Foothills regions of Alberta. The Black-throated Gre ...
... areas. This report summarizes available information on the Black-throated Green Warbler, as a step towards updating the status of this species in the province. The Black-throated Green Warbler is a neotropical migrant that breeds in the Boreal and Foothills regions of Alberta. The Black-throated Gre ...
global strategy on invasive alien species
... conditions, either on real islands or in ecological islands, such as freshwater ecosystems. The environmental cost is the irretrievable loss of native species and ecosystems. 11. Invasive species can transform the structure and species composition of ecosystems by repressing or excluding native spec ...
... conditions, either on real islands or in ecological islands, such as freshwater ecosystems. The environmental cost is the irretrievable loss of native species and ecosystems. 11. Invasive species can transform the structure and species composition of ecosystems by repressing or excluding native spec ...
Are Tree Species Diversity and Genotypic Diversity Effects on Insect
... of the preferred host plant is lower at high diversity if total plant abundance is held constant, resulting in lower recruitment to diverse patches (“Resource Concentration Hypothesis”) [16, 20]. In contrast, diversity generally does not influence the abundance of generalist herbivores since these a ...
... of the preferred host plant is lower at high diversity if total plant abundance is held constant, resulting in lower recruitment to diverse patches (“Resource Concentration Hypothesis”) [16, 20]. In contrast, diversity generally does not influence the abundance of generalist herbivores since these a ...
Ecological Correlates of Green Turtle (Chelonia mydas)
... spatially concentrated, home ranges are small (0.77–2.88 km2; Brill et al., 1995; Makowski, Seminoff, and Salmon, 2006; Mendonca, 1983; Renaud et al., 1995). However, at sites where food resources are widely scattered, home range areas are, on average, over 5 times greater (16.62 km2; Bahia de Los A ...
... spatially concentrated, home ranges are small (0.77–2.88 km2; Brill et al., 1995; Makowski, Seminoff, and Salmon, 2006; Mendonca, 1983; Renaud et al., 1995). However, at sites where food resources are widely scattered, home range areas are, on average, over 5 times greater (16.62 km2; Bahia de Los A ...
Western Screech-Owl kennicottii subspecies,Megascops kennicottii
... increase] in total number of mature individuals over the last [10 years, or 3 generations]. [Projected or suspected] percent [reduction or increase] in total number of mature individuals over the next [10 years, or 3 generations]. [Observed, estimated, inferred, or suspected] percent [reduction or i ...
... increase] in total number of mature individuals over the last [10 years, or 3 generations]. [Projected or suspected] percent [reduction or increase] in total number of mature individuals over the next [10 years, or 3 generations]. [Observed, estimated, inferred, or suspected] percent [reduction or i ...
Food webs: reconciling the structure and function of biodiversity
... nutrients through ecological systems [6,7]. Whereas community ecology tends to be reductionist, concentrating largely on processes driven by individuals, populations, or species, ecosystem research often takes a more holistic, systems approach. It remains tractable by aggregating species into broad ...
... nutrients through ecological systems [6,7]. Whereas community ecology tends to be reductionist, concentrating largely on processes driven by individuals, populations, or species, ecosystem research often takes a more holistic, systems approach. It remains tractable by aggregating species into broad ...
Journal of Animal - Centre d`études biologiques de Chizé
... Journal of Animal Ecology (2002) 71, 723-734 ...
... Journal of Animal Ecology (2002) 71, 723-734 ...
Seed size, growth rate and gap microsite
... Society, London, UK). To avoid problems of inconstant variance and negative mortality rates that might be predicted when normal errors models are applied to proportion data, we assumed binomial error distributions, used the total sample size from which each observed proportion was drawn as the binom ...
... Society, London, UK). To avoid problems of inconstant variance and negative mortality rates that might be predicted when normal errors models are applied to proportion data, we assumed binomial error distributions, used the total sample size from which each observed proportion was drawn as the binom ...
Traits fonctionnels des arbres : de la plasticité - Archipel
... Sample results of fixed and random (R) eff cts of an exemplary mixed model (REM L) used for analyzing results within IDENT sites for a given diversity effect or response function . Shown are results for first year tree height at the Montreal site t ested against species richness (SR) , functional di ...
... Sample results of fixed and random (R) eff cts of an exemplary mixed model (REM L) used for analyzing results within IDENT sites for a given diversity effect or response function . Shown are results for first year tree height at the Montreal site t ested against species richness (SR) , functional di ...
Management Plan for Yukon Amphibians
... 33% of amphibian species worldwide are threatened with 7% of these 33% on the brink of extinction (Stuart et al. 2004). They are regarded as good indicators of local environmental health as they are sensitive to small changes in local conditions (Stuart el al. 2004). In Yukon, amphibians garner a gr ...
... 33% of amphibian species worldwide are threatened with 7% of these 33% on the brink of extinction (Stuart et al. 2004). They are regarded as good indicators of local environmental health as they are sensitive to small changes in local conditions (Stuart el al. 2004). In Yukon, amphibians garner a gr ...
PETITION TO LIST THE Narrow-foot Hygrotus Diving Beetle
... The Narrow-foot Hygrotus Diving Beetle, Hygrotus diversipes, is about 4.5mm in length, oval in shape, with a pale yellowish color on its back and black on its abdomen. Miller 2002 at 1. The Diving Beetle has some unusual characteristics, which are probably synapomorphies (traits common to two or mor ...
... The Narrow-foot Hygrotus Diving Beetle, Hygrotus diversipes, is about 4.5mm in length, oval in shape, with a pale yellowish color on its back and black on its abdomen. Miller 2002 at 1. The Diving Beetle has some unusual characteristics, which are probably synapomorphies (traits common to two or mor ...
temporospatial distributions of elk, mule deer, and cattle: resource
... subtler forms, such as threat behavior or territoriality. Thus, interference competition precludes the use of a resource by a competing species, but does not necessarily remove that resource from the environment. Both mathematical (Lotka 1932) and empirical (Brown et al. 1979) approaches to understa ...
... subtler forms, such as threat behavior or territoriality. Thus, interference competition precludes the use of a resource by a competing species, but does not necessarily remove that resource from the environment. Both mathematical (Lotka 1932) and empirical (Brown et al. 1979) approaches to understa ...
monitoring declines in widely distributed species
... 2004; Collen et al, 2006). But, information is needed to combat the current crisis of biodiversity loss - this information is needed to design, implement and plan effective conservation strategies whilst also communicating the scope and severity of the problem (Baillie et al, 2004). The IUCN Red Lis ...
... 2004; Collen et al, 2006). But, information is needed to combat the current crisis of biodiversity loss - this information is needed to design, implement and plan effective conservation strategies whilst also communicating the scope and severity of the problem (Baillie et al, 2004). The IUCN Red Lis ...
Gymnesic Islands, Western Mediterranean
... wood mouse, Apodemus sylvaticus. Combined information from direct dating of bone collagen of E. quercinus and A. sylvaticus and from cultural associations provides an adequate framework to establish the chronology of the faunal change and to compare it with the chronological information available on ...
... wood mouse, Apodemus sylvaticus. Combined information from direct dating of bone collagen of E. quercinus and A. sylvaticus and from cultural associations provides an adequate framework to establish the chronology of the faunal change and to compare it with the chronological information available on ...
Landscape size affects the relative importance of habitat amount
... however, since most recommendations for landscape management refer to the fragmentation or loss of forests in general (Ontario Partners in Flight 2005) and since we were also interested in a group of fragmentation-sensitive species, we feel this broad habitat definition is the most appropriate. Alth ...
... however, since most recommendations for landscape management refer to the fragmentation or loss of forests in general (Ontario Partners in Flight 2005) and since we were also interested in a group of fragmentation-sensitive species, we feel this broad habitat definition is the most appropriate. Alth ...
Negative competitive effects of invasive plants change with time
... with a different native pairing, except for Verlinden et al. (2013), who measured invaders’ effects with only one native plant pairing. All studies that measured non-significant or low negative competitive effects were included in the meta-analysis. Average effect sizes were calculated for all invad ...
... with a different native pairing, except for Verlinden et al. (2013), who measured invaders’ effects with only one native plant pairing. All studies that measured non-significant or low negative competitive effects were included in the meta-analysis. Average effect sizes were calculated for all invad ...
Centrostephanus rodgersii on shallow subtidal
... Underwood et a1.1991) as were crustose corallines Lithothamnion sp., Neogoniolithon sp. and Porolithon sp. Differences among replicates in the species composition of these categories are highlighted where appropriate. The numerical responses of the following variables were estimated bimonthly betwee ...
... Underwood et a1.1991) as were crustose corallines Lithothamnion sp., Neogoniolithon sp. and Porolithon sp. Differences among replicates in the species composition of these categories are highlighted where appropriate. The numerical responses of the following variables were estimated bimonthly betwee ...
Linking nutrient loading, local abiotic variables, richness and
... Multivariate data analyses on the abiotic environment and biotic patterns were performed by the statistical program PRIMER version 6.1.5 (Clarke and Gorley, 2006). Invertebrate biomass data were not transformed. Similarities between each pair of samples were calculated using a zero-adjusted Bray–Cur ...
... Multivariate data analyses on the abiotic environment and biotic patterns were performed by the statistical program PRIMER version 6.1.5 (Clarke and Gorley, 2006). Invertebrate biomass data were not transformed. Similarities between each pair of samples were calculated using a zero-adjusted Bray–Cur ...
CHANGES IN ARTHROPOD ABUNDANCE AND DIVERSITY WITH
... communities, with concomitant effects on arthropods. To reveal general patterns and better understand changes, I examined 39 peer-reviewed scientific articles that investigated effects of invasive plants on arthropod communities and functional groups. Nearly half (19/39) of studies examined communit ...
... communities, with concomitant effects on arthropods. To reveal general patterns and better understand changes, I examined 39 peer-reviewed scientific articles that investigated effects of invasive plants on arthropod communities and functional groups. Nearly half (19/39) of studies examined communit ...
Is invasion success explained by the enemy release hypothesis?
... of these, both dealing with soil pathogens, found unconditional evidence to support the ERH. However, none of the soil microbe experiments in our review differentiated between the effects of pathogenic and facilitative interactions. Thus a reduction in the negative effects of soil microbes could be ...
... of these, both dealing with soil pathogens, found unconditional evidence to support the ERH. However, none of the soil microbe experiments in our review differentiated between the effects of pathogenic and facilitative interactions. Thus a reduction in the negative effects of soil microbes could be ...
Final Report - The Rufford Foundation
... were both statistically positively correlated with their abundance (r = 0.759, p < 0.0001; r = 0.996, p < 0.0001). Flower consumption was significantly positively correlated with its abundance as well (r = 0.660, p < 0.0001). For the High-altitude Troop, flowers and ripe fruits were not observed to ...
... were both statistically positively correlated with their abundance (r = 0.759, p < 0.0001; r = 0.996, p < 0.0001). Flower consumption was significantly positively correlated with its abundance as well (r = 0.660, p < 0.0001). For the High-altitude Troop, flowers and ripe fruits were not observed to ...
LESSER PRAIRIE CHICKEN Crude Oil and Natural Gas
... avoid potential impacts to the LPC in Oklahoma. These measures, if implemented, may preclude or remove any need to list the LPC under the ESA by reducing or eliminating impacts that the USFWS has identified as threats to the species. Furthermore, these voluntary best practices are consistent with th ...
... avoid potential impacts to the LPC in Oklahoma. These measures, if implemented, may preclude or remove any need to list the LPC under the ESA by reducing or eliminating impacts that the USFWS has identified as threats to the species. Furthermore, these voluntary best practices are consistent with th ...
Document
... potential for competition (direct or indirect) for nest or foraging sites. A full list can ...
... potential for competition (direct or indirect) for nest or foraging sites. A full list can ...
Habitat Loss and Fragmentation
... Island biogeographic theory (MacArthur and Wilson, 1967) greatly increased interest not only in the consequences of habitat fragmentation but also led to an overemphasis on patch-level (‘‘island’’) measurements rather than landscapelevel measurements (Laurance, 2008). Many habitat fragmentation stud ...
... Island biogeographic theory (MacArthur and Wilson, 1967) greatly increased interest not only in the consequences of habitat fragmentation but also led to an overemphasis on patch-level (‘‘island’’) measurements rather than landscapelevel measurements (Laurance, 2008). Many habitat fragmentation stud ...
nsw scientific committee
... population. Generation length reflects the turnover rate of breeding individuals in a population. It is greater than the age at first breeding and less than the age of the oldest breeding individual, except in taxa that breed only once. Where generation length varies under threat, the more natural ( ...
... population. Generation length reflects the turnover rate of breeding individuals in a population. It is greater than the age at first breeding and less than the age of the oldest breeding individual, except in taxa that breed only once. Where generation length varies under threat, the more natural ( ...