Peter A. Abrams 1 1 Publications of Peter A. Abrams April 2012 I
... Abrams, P. A. 1987. Alternative models of character displacement: II. Displacement when there is competition for a single resource. American Naturalist 130:271-282. Abrams, P. A. 1987. The functional responses of adaptive consumers of two resources. Theoretical Population Biology 32:262-288. Abrams, ...
... Abrams, P. A. 1987. Alternative models of character displacement: II. Displacement when there is competition for a single resource. American Naturalist 130:271-282. Abrams, P. A. 1987. The functional responses of adaptive consumers of two resources. Theoretical Population Biology 32:262-288. Abrams, ...
Thresholds in Habitat Supply: A Review of the Literature
... of extinction (Frankel and Soulé 1981). Due to the higher risk of species extinction once population numbers are lower, maintaining functioning landscapes above critical habitat requirements is necessary to maintain viable populations. However, because species differ in their need for habitat amount ...
... of extinction (Frankel and Soulé 1981). Due to the higher risk of species extinction once population numbers are lower, maintaining functioning landscapes above critical habitat requirements is necessary to maintain viable populations. However, because species differ in their need for habitat amount ...
EDGE EFFECT INTERACTIONS IN AN AFRICAN SAVANNA By
... edges to large, complex landscapes. Recent findings suggest that edge effects are highly sensitive to landscape context. In particular, edge effects can be altered by the presence and configuration of other, nearby edges. This phenomenon – edge interaction – is poorly understood, despite recognition ...
... edges to large, complex landscapes. Recent findings suggest that edge effects are highly sensitive to landscape context. In particular, edge effects can be altered by the presence and configuration of other, nearby edges. This phenomenon – edge interaction – is poorly understood, despite recognition ...
The Relative Effects of Grazing By Bison and Cattle on
... interactions between these variables on plant community responses. I used semivariance analyses and Moran’s I to quantify the effect of grazing on vegetation patchiness. I also indirectly assessed the importance of herbivore selectivity for maintaining species diversity by monitoring vegetation in t ...
... interactions between these variables on plant community responses. I used semivariance analyses and Moran’s I to quantify the effect of grazing on vegetation patchiness. I also indirectly assessed the importance of herbivore selectivity for maintaining species diversity by monitoring vegetation in t ...
SPATIAL SYNCHRONY IN POPULATION DYNAMICS∗ Andrew
... populations. However, researchers have observed considerable variation in the geographical range of synchrony in studies of various organisms, only some of which can be attributed to differences in scale intrinsic to the organism itself. The observed range of spatial synchrony is a few centimeters i ...
... populations. However, researchers have observed considerable variation in the geographical range of synchrony in studies of various organisms, only some of which can be attributed to differences in scale intrinsic to the organism itself. The observed range of spatial synchrony is a few centimeters i ...
SPATIAL SYNCHRONY IN POPULATION DYNAMICS ∗ Andrew
... populations. However, researchers have observed considerable variation in the geographical range of synchrony in studies of various organisms, only some of which can be attributed to differences in scale intrinsic to the organism itself. The observed range of spatial synchrony is a few centimeters i ...
... populations. However, researchers have observed considerable variation in the geographical range of synchrony in studies of various organisms, only some of which can be attributed to differences in scale intrinsic to the organism itself. The observed range of spatial synchrony is a few centimeters i ...
714.pdf
... (Centrocercus minimus). Greater Sage-Grouse populations in Washington and the Lyon-Mono population, spanning the border between Nevada and California, also have unique genetic characteristics (Oyler-McCance and Quinn, this volume, chapter 5) but have not been described as separate species. The distr ...
... (Centrocercus minimus). Greater Sage-Grouse populations in Washington and the Lyon-Mono population, spanning the border between Nevada and California, also have unique genetic characteristics (Oyler-McCance and Quinn, this volume, chapter 5) but have not been described as separate species. The distr ...
fragmentation of terrestrial habitat
... relationships because of natural and anthropogenic mechanisms. Habitat fragmentation is arguably the greatest conservation challenge facing today’s wildlife biologists, of which most biologists are keenly aware because habitat is a unifying resource for most wildlife conservation efforts. For the pa ...
... relationships because of natural and anthropogenic mechanisms. Habitat fragmentation is arguably the greatest conservation challenge facing today’s wildlife biologists, of which most biologists are keenly aware because habitat is a unifying resource for most wildlife conservation efforts. For the pa ...
View PDF - Cramer Fish Sciences
... stable is its biotic community. These principles anticipated, in part, several general ecological and evolutionary hypotheses that continue to be debated and tested by ecologists today. The first principle predicts that species richness will increase with increasing spatial heterogeneity, as observe ...
... stable is its biotic community. These principles anticipated, in part, several general ecological and evolutionary hypotheses that continue to be debated and tested by ecologists today. The first principle predicts that species richness will increase with increasing spatial heterogeneity, as observe ...
Landscape-scale eco-evolutionary dynamics: Selection by seed
... percentage serotiny in a given stand potentially stems from a balance of selection from an abiotic factor, fire, and a biotic factor, seed predation. Isolated lodgepole pine stands that have historically lacked American red squirrels (Tamiasciurus hudsonicus), the primary predispersal seed predator i ...
... percentage serotiny in a given stand potentially stems from a balance of selection from an abiotic factor, fire, and a biotic factor, seed predation. Isolated lodgepole pine stands that have historically lacked American red squirrels (Tamiasciurus hudsonicus), the primary predispersal seed predator i ...
Lesson Overview
... Economics and ecology share the same word root. Indeed, human economics and ecology are linked. Humans live within the biosphere and depend on ecological processes to provide such essentials as food and drinkable water that can be bought and sold for money. ...
... Economics and ecology share the same word root. Indeed, human economics and ecology are linked. Humans live within the biosphere and depend on ecological processes to provide such essentials as food and drinkable water that can be bought and sold for money. ...
New Zealand as ecosystems - Department of Conservation
... ted by the 1991 Resource Management Act’s recognition of ecosystems as matters of national importance—has been the 1977 Reserves Act’s concern with ‘the preservation of all classes of natural ecosystems and landscapes’. Its immediate practical outcome, New Zealand’s Protected Natural Area Programme ...
... ted by the 1991 Resource Management Act’s recognition of ecosystems as matters of national importance—has been the 1977 Reserves Act’s concern with ‘the preservation of all classes of natural ecosystems and landscapes’. Its immediate practical outcome, New Zealand’s Protected Natural Area Programme ...
EFFECTS OF HABITAT FRAGMENTATION ON
... only two, i.e., one continuous landscape and one fragmented landscape. With such a design, inferences about the effects of fragmentation are weak. Apparent effects of fragmentation could easily be due to other differences between the landscapes. For example, Mac Nally et al. (2000) found consistent ...
... only two, i.e., one continuous landscape and one fragmented landscape. With such a design, inferences about the effects of fragmentation are weak. Apparent effects of fragmentation could easily be due to other differences between the landscapes. For example, Mac Nally et al. (2000) found consistent ...
Biodiversity, Functioning - School of Natural Resources and
... concerns biodiversity effects observed in multitrophic studies. We consider the effect of changing biodiversity at one trophic level on functions carried out by a different (mostly adjacent) trophic level. If the latter is above the manipulated level, we speak of bottom-up biodiversity effects; if i ...
... concerns biodiversity effects observed in multitrophic studies. We consider the effect of changing biodiversity at one trophic level on functions carried out by a different (mostly adjacent) trophic level. If the latter is above the manipulated level, we speak of bottom-up biodiversity effects; if i ...
effects of habitat fragmentation on biodiversity
... reason is that when ecologists think of fragmentation, the word invokes more than habitat removal: “fragmentation . . . not only causes loss of the amount of habitat, but by creating small, isolated patches it also changes the properties of the remaining habitat” (van den Berg et al. 2001). Habitat ...
... reason is that when ecologists think of fragmentation, the word invokes more than habitat removal: “fragmentation . . . not only causes loss of the amount of habitat, but by creating small, isolated patches it also changes the properties of the remaining habitat” (van den Berg et al. 2001). Habitat ...
Linkages in the Landscape
... areas have been designed, at least during the last 50 years, to be “islands of conservation in an ocean of destruction”. Whether on land, at the coastal edge, or on the high seas, if the concept of protected area as fortress conservation was acceptable in the 20th century, we can see now that it is ...
... areas have been designed, at least during the last 50 years, to be “islands of conservation in an ocean of destruction”. Whether on land, at the coastal edge, or on the high seas, if the concept of protected area as fortress conservation was acceptable in the 20th century, we can see now that it is ...
Habitat Monitoring Strategy for the Tidal Skagit Delta Integrating
... footprint. For this monitoring plan, landscape-scale success will be defined by the degree to which natural landscape-scale physical processes and synergies (e.g., distributary dynamics, sediment routing, allometry of tidal prism and channel geometry [Hood 2007a]) as well as landscape-scale ecologic ...
... footprint. For this monitoring plan, landscape-scale success will be defined by the degree to which natural landscape-scale physical processes and synergies (e.g., distributary dynamics, sediment routing, allometry of tidal prism and channel geometry [Hood 2007a]) as well as landscape-scale ecologic ...
Annemarie Nagle
... ecologist Eugenius Warming, whose work in Brazil led him to publish one of the first papers describing ecological succession in 1896 (Laroca 2002). Indeed almost all of the early work done in successional ecology was done by European ecologists, but it was the American ecologists who ran with this c ...
... ecologist Eugenius Warming, whose work in Brazil led him to publish one of the first papers describing ecological succession in 1896 (Laroca 2002). Indeed almost all of the early work done in successional ecology was done by European ecologists, but it was the American ecologists who ran with this c ...
toward a metabolic theory of ecology
... temperature, and stoichiometry affect biological structure and function at the molecular, cellular, and wholeorganism levels of organization raises the prospect of developing a metabolic theory of ecology. Metabolism is a uniquely biological process, but it obeys the physical and chemical principles ...
... temperature, and stoichiometry affect biological structure and function at the molecular, cellular, and wholeorganism levels of organization raises the prospect of developing a metabolic theory of ecology. Metabolism is a uniquely biological process, but it obeys the physical and chemical principles ...
Quantifying Terrestrial Habitat Loss and Fragmentation: A Protocol
... subdivision, geometry, isolation, and connectivity, and their affects on individual behavior and habitat use, population structure and viability, and interspecific interactions. Finally, we view the evidence, both theoretical and empirical, regarding the issue of when is habitat fragmentation import ...
... subdivision, geometry, isolation, and connectivity, and their affects on individual behavior and habitat use, population structure and viability, and interspecific interactions. Finally, we view the evidence, both theoretical and empirical, regarding the issue of when is habitat fragmentation import ...
A synthetic review of feedbacks and drivers of shrub encroachment
... 2002). However, livestock will often consume and transport viable shrub seeds (Archer 1989, Brown and Archer 1999, Fredrickson et al., 2006), thus serving as a vector and a facilitator for the establishment of the seeds of shrub species in the grazed area. Native mammal species, including deer (Odoc ...
... 2002). However, livestock will often consume and transport viable shrub seeds (Archer 1989, Brown and Archer 1999, Fredrickson et al., 2006), thus serving as a vector and a facilitator for the establishment of the seeds of shrub species in the grazed area. Native mammal species, including deer (Odoc ...
Daylily Production and Landscape Care
... grassy weeds emerging from seed. Ideally, the objective would be to gain broad-spectrum control of both grass and broadleaf weeds. To achieve this, product selection is critical. Product selection may involve applying more than one herbicide or a product that contains more than one herbicidal active ...
... grassy weeds emerging from seed. Ideally, the objective would be to gain broad-spectrum control of both grass and broadleaf weeds. To achieve this, product selection is critical. Product selection may involve applying more than one herbicide or a product that contains more than one herbicidal active ...
pdf here
... humans on the behaviour of large carnivores and their prey. These include indirect effects through changes in the landscape in which predator and prey interact, and direct effects on the behaviour of predator and prey. Landscape features, particularly vegetation structure, are the main determinants ...
... humans on the behaviour of large carnivores and their prey. These include indirect effects through changes in the landscape in which predator and prey interact, and direct effects on the behaviour of predator and prey. Landscape features, particularly vegetation structure, are the main determinants ...
Habitat heterogeneity and mammalian predatorprey interactions
... In this review, we aim to explore how habitat spatial heterogeneity may affect predator–prey dynamics in terrestrial mammalian systems, i.e. in systems characterized by highly mobile species, and focus on predation by mammals on mammals with a few exceptions of avian predation on mammals. We provide ...
... In this review, we aim to explore how habitat spatial heterogeneity may affect predator–prey dynamics in terrestrial mammalian systems, i.e. in systems characterized by highly mobile species, and focus on predation by mammals on mammals with a few exceptions of avian predation on mammals. We provide ...
Canterbury Landscape Character and Biodiversity Appraisal
... This document has been prepared by a division, subsidiary or affiliate of Jacobs Engineering U.K. Limited (“Jacobs”) in its professional capacity as consultants in accordance with the terms and conditions of Jacobs’ contract with the commissioning party (the “Client”). Regard should be had to those ...
... This document has been prepared by a division, subsidiary or affiliate of Jacobs Engineering U.K. Limited (“Jacobs”) in its professional capacity as consultants in accordance with the terms and conditions of Jacobs’ contract with the commissioning party (the “Client”). Regard should be had to those ...
Landscape ecology
Landscape ecology is the science of studying and improving relationships between ecological processes in the environment and particular ecosystems. This is done within a variety of landscape scales, development spatial patterns, and organizational levels of research and policy.As a highly interdisciplinary field in systems science, landscape ecology integrates biophysical and analytical approaches with humanistic and holistic perspectives across the natural sciences and social sciences. Landscapes are spatially heterogeneous geographic areas characterized by diverse interacting patches or ecosystems, ranging from relatively natural terrestrial and aquatic systems such as forests, grasslands, and lakes to human-dominated environments including agricultural and urban settings. The most salient characteristics of landscape ecology are its emphasis on the relationship among pattern, process and scale, and its focus on broad-scale ecological and environmental issues. These necessitate the coupling between biophysical and socioeconomic sciences. Key research topics in landscape ecology include ecological flows in landscape mosaics, land use and land cover change, scaling, relating landscape pattern analysis with ecological processes, and landscape conservation and sustainability.