Organization of the Biosphere:
... Survivorship curves help to describe the reproductive strategy of a species. Define the “Survivorship Curve” ...
... Survivorship curves help to describe the reproductive strategy of a species. Define the “Survivorship Curve” ...
CISA letter in response to Environ
... Eelgrass density is depressed by space competition with farmed geoducks, and intertidal harvest reduces eelgrass density by more than 70 percent. (See ‘Geoduck Clam Aquaculture as Press and Pulse Perturbations to Eelgrass’, Ruesink, Rowell.) An evaluation by Entrix in 2004, also funded by Taylor She ...
... Eelgrass density is depressed by space competition with farmed geoducks, and intertidal harvest reduces eelgrass density by more than 70 percent. (See ‘Geoduck Clam Aquaculture as Press and Pulse Perturbations to Eelgrass’, Ruesink, Rowell.) An evaluation by Entrix in 2004, also funded by Taylor She ...
Swainson`s Hawk (Buteo swainsoni)
... Loss of high-quality foraging habitat is probably the most significant threat to the species’ population within the inventory area. Loss of nesting habitat (remnant riparian) may be a threat to this species statewide. In addition, nest sites on private lands are vulnerable to changes in development ...
... Loss of high-quality foraging habitat is probably the most significant threat to the species’ population within the inventory area. Loss of nesting habitat (remnant riparian) may be a threat to this species statewide. In addition, nest sites on private lands are vulnerable to changes in development ...
Differential fitness in field and forest explains density
... In this study, we tested the hypothesis that habitat selection by snakes is not a function of conspecific density because the fitness of snakes is more tightly linked to thermal quality, a non-depletable resource, than to the availability of depletable resources. More specifically, we tested the pre ...
... In this study, we tested the hypothesis that habitat selection by snakes is not a function of conspecific density because the fitness of snakes is more tightly linked to thermal quality, a non-depletable resource, than to the availability of depletable resources. More specifically, we tested the pre ...
Habitat Management Plan for the endangered Forty
... 1998). It is therefore difficult to determine the maximum distance between suitable patches which can still support dispersal. It is also difficult to determine the minimum patch size. For instance, it is estimated that a 0.5 ha patch with only 5% E. viminalis is sufficient for a single breeding pai ...
... 1998). It is therefore difficult to determine the maximum distance between suitable patches which can still support dispersal. It is also difficult to determine the minimum patch size. For instance, it is estimated that a 0.5 ha patch with only 5% E. viminalis is sufficient for a single breeding pai ...
A swift exit - Birdlife Australia
... In the context of Sugar Glider predation, these results are particularly important. Flowering forests occupied by gliders may pose a serious risk to birds looking for a place to nest. We found that Swift Parrots mostly breed on the Tasmanian mainland where gliders occur, and offshore islands only su ...
... In the context of Sugar Glider predation, these results are particularly important. Flowering forests occupied by gliders may pose a serious risk to birds looking for a place to nest. We found that Swift Parrots mostly breed on the Tasmanian mainland where gliders occur, and offshore islands only su ...
Local Ecological Communities
... established facts of ecological life. There is an established fact: medium term persistence in community membership. But persistence on this scale may not depend on internal regulation (though the issues remain both technical and fraught: see Turchin 1999). The alternative to internal regulation is ...
... established facts of ecological life. There is an established fact: medium term persistence in community membership. But persistence on this scale may not depend on internal regulation (though the issues remain both technical and fraught: see Turchin 1999). The alternative to internal regulation is ...
Regional Actions by RCN Project Summary 2-16
... Use of, and complications with the use of, the NCAT and associated products at the state, basin or multi‐state scales Updates that have been made to state or other relevant databases New decision support systems and assessment methodologies that have been developed in the region (e.g. future C ...
... Use of, and complications with the use of, the NCAT and associated products at the state, basin or multi‐state scales Updates that have been made to state or other relevant databases New decision support systems and assessment methodologies that have been developed in the region (e.g. future C ...
Positive interactions expand habitat use and the realized niches of
... 2011), and proposing to abandon it altogether (Chase and Leibold 2003). Positive interactions are particularly problematic for niche theory (Bruno and Bertness 2001). Foundation species, for example, provide group benefits, ameliorate physical and biotic stresses, expand species distributions, and in ...
... 2011), and proposing to abandon it altogether (Chase and Leibold 2003). Positive interactions are particularly problematic for niche theory (Bruno and Bertness 2001). Foundation species, for example, provide group benefits, ameliorate physical and biotic stresses, expand species distributions, and in ...
Black-capped Vireo - Vireo atricapillus
... central and southwest Texas, a few counties in central Oklahoma, and in Coahuila and Nuevo Leon, Mexico, although less is known of their status in Mexico. Black-capped Vireos winter along the western coast of Mexico. The descriptions of habitat presented in this document are intended to help landown ...
... central and southwest Texas, a few counties in central Oklahoma, and in Coahuila and Nuevo Leon, Mexico, although less is known of their status in Mexico. Black-capped Vireos winter along the western coast of Mexico. The descriptions of habitat presented in this document are intended to help landown ...
Conceptual problems and scale limitations of defining ecological
... van Andel model of ecological communities Looijen & van Andel (1999) provided two criteria that are linked together as their approach to defining communities. The first of these could be called ‘restricted membership’. Looijen & van Andel (1999) noted that researchers have defined communities as eit ...
... van Andel model of ecological communities Looijen & van Andel (1999) provided two criteria that are linked together as their approach to defining communities. The first of these could be called ‘restricted membership’. Looijen & van Andel (1999) noted that researchers have defined communities as eit ...
How does adaptive consumer movement affect population dynamics
... 1. Introduction The question posed by the title is important because most natural consumer–resource interactions occur in spatially subdivided ecological systems (metacommunities) connected by the dispersal of individuals. While movement behavior is likely to be adaptive (Bowler and Benton, 2005), r ...
... 1. Introduction The question posed by the title is important because most natural consumer–resource interactions occur in spatially subdivided ecological systems (metacommunities) connected by the dispersal of individuals. While movement behavior is likely to be adaptive (Bowler and Benton, 2005), r ...
Conserving Wildlife in Maine`s Coastal Habitats
... comprise only 12 percent of the state’s area. This concentration of people and demand for waterfront property means potential loss of wildlife, habitat, scenic beauty, and recreational and economic opportunity. A healthy coastal zone is critical for hundreds of wildlife species as well as Maine’s mu ...
... comprise only 12 percent of the state’s area. This concentration of people and demand for waterfront property means potential loss of wildlife, habitat, scenic beauty, and recreational and economic opportunity. A healthy coastal zone is critical for hundreds of wildlife species as well as Maine’s mu ...
Habitat suitability modelling and niche theory
... the local combination of environmental variables allows, on average, a positive population growth rate. These variables (also called predictors, covariates, or ecogeographical/ independent variables) are the dimensions of the environmental space. The ecological niche is the volume in the environment ...
... the local combination of environmental variables allows, on average, a positive population growth rate. These variables (also called predictors, covariates, or ecogeographical/ independent variables) are the dimensions of the environmental space. The ecological niche is the volume in the environment ...
The Geographical Ecology of Mammals
... outcomes of history, reflecting probabilistic events, produce unpredictable patterns in biodiversity. It is true that ecological communities, and the local and regional diversity from which they draw their membership, carry contingent scars of history. But some species (and clades) are more prone to ...
... outcomes of history, reflecting probabilistic events, produce unpredictable patterns in biodiversity. It is true that ecological communities, and the local and regional diversity from which they draw their membership, carry contingent scars of history. But some species (and clades) are more prone to ...
The landscape context of trophic interactions: insect spillover across
... renewed interest in the improvement of farming practices and conservation biological control (Barbosa 2003, Snyder et al. 2005). Cross-habitat foraging by consumers, herbivores and predators, may couple the dynamics of distinct habitats or landscape elements. An important concept emerging from this ...
... renewed interest in the improvement of farming practices and conservation biological control (Barbosa 2003, Snyder et al. 2005). Cross-habitat foraging by consumers, herbivores and predators, may couple the dynamics of distinct habitats or landscape elements. An important concept emerging from this ...
Behavior of Plankton and Patch Formation in Pelagic Ecosystems
... whether in the laboratory or the field, but such observations are almost entirely lacking for pelagic animals (Hamner, 1985; Hamner et aI., 1987). For example, although thousands of publications have examined what may be the dominant behavioral pattern on earth, that of vertical diurnal migration, n ...
... whether in the laboratory or the field, but such observations are almost entirely lacking for pelagic animals (Hamner, 1985; Hamner et aI., 1987). For example, although thousands of publications have examined what may be the dominant behavioral pattern on earth, that of vertical diurnal migration, n ...
SPECIES ACCOUNT – SNOWSHOE HARE (m
... Snowshoe hares are crepuscular mammals who remain active all winter. Their activity is governed by light. They are more active on cloudy winter afternoons than on sunny days and are very active during moonlit nights. Wind and light are a main deterrent to widespread foraging. When not foraging, snow ...
... Snowshoe hares are crepuscular mammals who remain active all winter. Their activity is governed by light. They are more active on cloudy winter afternoons than on sunny days and are very active during moonlit nights. Wind and light are a main deterrent to widespread foraging. When not foraging, snow ...
a.16 western spadefoot toad - Butte Regional Conservation Plan
... reproduction. This species becomes active following warm rains occurring in the winter and spring. The toads emerge from burrows constructed in loose soil that are at least 1 meter (3 feet) deep (Stebbins 1972) and become active on the surface from October through April when enough rain has fallen ( ...
... reproduction. This species becomes active following warm rains occurring in the winter and spring. The toads emerge from burrows constructed in loose soil that are at least 1 meter (3 feet) deep (Stebbins 1972) and become active on the surface from October through April when enough rain has fallen ( ...
Aves (Birds): Strigiformes, Strigidae Burrowing Owl (Athene
... sprayed over nest burrows [37]. The effects of consuming poisoned prey on burrowing owl are not well known [28]. However, weight of breeding burrowing owl in pastures where strychninecoated grain was used to control ground squirrels was significantly lower than on control pastures, suggesting either ...
... sprayed over nest burrows [37]. The effects of consuming poisoned prey on burrowing owl are not well known [28]. However, weight of breeding burrowing owl in pastures where strychninecoated grain was used to control ground squirrels was significantly lower than on control pastures, suggesting either ...
Habitat
... Notes: Razor Clams have been known to live 18 years, though their average life-span is five years. Razor Clams have been found up to one-half mile offshore. Domoic acid collects in the tissue of Razor Clams. This naturally occurring by-product of phytoplanktons is poisonous to humans. It appears tha ...
... Notes: Razor Clams have been known to live 18 years, though their average life-span is five years. Razor Clams have been found up to one-half mile offshore. Domoic acid collects in the tissue of Razor Clams. This naturally occurring by-product of phytoplanktons is poisonous to humans. It appears tha ...
Title Spatial Niche Facilitates Clonal Reproduction in Seed Plants
... (called ramets) of various ages are clustered and live together (this unit is called a genet) in the same space for a long time in a population. It is therefore natural that they experience not only various environmental changes and/or attacks by herbivores and pathogens [23–25] but also demographic ...
... (called ramets) of various ages are clustered and live together (this unit is called a genet) in the same space for a long time in a population. It is therefore natural that they experience not only various environmental changes and/or attacks by herbivores and pathogens [23–25] but also demographic ...
Diversity and Distribution of Spiders in Southwestern Nigeria
... determined due to accessibility. Cultivated habitat has the highest diversity of spider as shown in Figure 3. This is in accordance with the findings of Whitmore et al. [11] that Spider has also been found to have great potential to serve as biological control agent against crop pests in cultivated ...
... determined due to accessibility. Cultivated habitat has the highest diversity of spider as shown in Figure 3. This is in accordance with the findings of Whitmore et al. [11] that Spider has also been found to have great potential to serve as biological control agent against crop pests in cultivated ...
A mechanistic approach to understanding range shifts in a changing
... the individuals that successfully persist in the newly colonized territory? The dispersal literature describes a three step process: dispersal from the old habitat (emigration), transition, and settlement in the new habitat (immigration) (Clobert et al., 2009; Bowler and Benton, 2005). Each step of ...
... the individuals that successfully persist in the newly colonized territory? The dispersal literature describes a three step process: dispersal from the old habitat (emigration), transition, and settlement in the new habitat (immigration) (Clobert et al., 2009; Bowler and Benton, 2005). Each step of ...
Minimizing Avian Predation Through Habitat Management
... timing, size and frequency of burns can be important as they relate to the susceptibility of quail to avian predators. In general: 1) burn in late winter through early spring to minimize exposure of quail to avian predators; 2) burn small blocks (10 acres to 50 acres – smaller is better) of habitat ...
... timing, size and frequency of burns can be important as they relate to the susceptibility of quail to avian predators. In general: 1) burn in late winter through early spring to minimize exposure of quail to avian predators; 2) burn small blocks (10 acres to 50 acres – smaller is better) of habitat ...