Varanus acanthurus. Photo by Jeff Lemm.
... greenhouse effect, which has changed the climate to produce ever increasing maximum temperatures. Increased temperatures threaten some lizard species in highly biodiverse tropical and subtropical regions. Many lizards are also threatened by habitat loss and over-harvesting. Although lizards are ecto ...
... greenhouse effect, which has changed the climate to produce ever increasing maximum temperatures. Increased temperatures threaten some lizard species in highly biodiverse tropical and subtropical regions. Many lizards are also threatened by habitat loss and over-harvesting. Although lizards are ecto ...
Ecometrics: The traits that bind the past and present together
... distributions, generating feedback loops that are a dominant part of the dynamics of the climate and biotic systems existing in the world today (Salik 1995). Just as individual organisms, populations and communities have different phenotypic traits, individual humans and societies have different cul ...
... distributions, generating feedback loops that are a dominant part of the dynamics of the climate and biotic systems existing in the world today (Salik 1995). Just as individual organisms, populations and communities have different phenotypic traits, individual humans and societies have different cul ...
pdf
... invasive weed in the forests of the Pacific Northwest and Eastern U.S. where it outcompetes native plants and displaces the associated animal communities. The “Gray” Area There are obvious examples of invasive species such as snakehead fish, yellow starthistle, or Phytophthora ramorum (the organism ...
... invasive weed in the forests of the Pacific Northwest and Eastern U.S. where it outcompetes native plants and displaces the associated animal communities. The “Gray” Area There are obvious examples of invasive species such as snakehead fish, yellow starthistle, or Phytophthora ramorum (the organism ...
A boreal invasion in response to climate change? Range shifts and
... an absence of conspicuous high-amplitude peaks does not exclude the possibility that cycles persist, but with inconspicuous low-amplitude peaks, analyses of the dynamics of rodent-dependent predators in 1960–2008 suggest that regular cycles were absent for some time in the 1980s and 1990s in both al ...
... an absence of conspicuous high-amplitude peaks does not exclude the possibility that cycles persist, but with inconspicuous low-amplitude peaks, analyses of the dynamics of rodent-dependent predators in 1960–2008 suggest that regular cycles were absent for some time in the 1980s and 1990s in both al ...
Invasive Species Definition Clarification and Guidance White Paper
... invasive weed in the forests of the Pacific Northwest and Eastern U.S. where it outcompetes native plants and displaces the associated animal communities. The “Gray” Area There are obvious examples of invasive species such as snakehead fish, yellow starthistle, or Phytophthora ramorum (the organism ...
... invasive weed in the forests of the Pacific Northwest and Eastern U.S. where it outcompetes native plants and displaces the associated animal communities. The “Gray” Area There are obvious examples of invasive species such as snakehead fish, yellow starthistle, or Phytophthora ramorum (the organism ...
Priority Research and Management Issues for the Imperiled Great
... Past and present land uses, climate change, invasion of nonnative species, and altered fire regimes are influencing the region’s ecosystems and resulting in large-scale vegetation type conversions. Sagebrush ecosystems have been identified as one of the most endangered ecosystem types in the United ...
... Past and present land uses, climate change, invasion of nonnative species, and altered fire regimes are influencing the region’s ecosystems and resulting in large-scale vegetation type conversions. Sagebrush ecosystems have been identified as one of the most endangered ecosystem types in the United ...
Landscape Ecology and Ecosystems Management
... in the landscape often occurs in patches within an agricultural landscape matrix. Managing wildlife at the landscape level is an attempt to unite habitat patches (through the use of corridors, specifically riparian forests or fencerow habitats) to allow native biodiversity to flourish across the com ...
... in the landscape often occurs in patches within an agricultural landscape matrix. Managing wildlife at the landscape level is an attempt to unite habitat patches (through the use of corridors, specifically riparian forests or fencerow habitats) to allow native biodiversity to flourish across the com ...
GLOBAL WARMING AND FLOWERING TIMES IN THOREAU`S
... Dean). Alfred Hosmer, a shopkeeper and amateur botanist, continued these observations of FFDs in Concord for over 700 plant taxa in 1878 and 1888– 1902 (Hosmer 1878–1903). Thoreau’s and Hosmer’s records included the flowering times of plants in all habitat types. Later, from 1963 to 1993, Pennie Loge ...
... Dean). Alfred Hosmer, a shopkeeper and amateur botanist, continued these observations of FFDs in Concord for over 700 plant taxa in 1878 and 1888– 1902 (Hosmer 1878–1903). Thoreau’s and Hosmer’s records included the flowering times of plants in all habitat types. Later, from 1963 to 1993, Pennie Loge ...
Outline for the next 2 weeks Habitat loss, degradation and
... Habitat loss, degradation and fragmentation changes to the landscape evaluating the impacts Guest – Species at Risk –Steph Hazlitt (BC) Guest – Conservation – a Mexican perspective Edge effects Ecological Traps Guest – Species at Risk – Dave Toews (Fed.) ...
... Habitat loss, degradation and fragmentation changes to the landscape evaluating the impacts Guest – Species at Risk –Steph Hazlitt (BC) Guest – Conservation – a Mexican perspective Edge effects Ecological Traps Guest – Species at Risk – Dave Toews (Fed.) ...
Journal of Experimental Marine Biology and Ecology
... end of the current century, with increases in mean temperatures and in the frequency and magnitude of extreme temperature events (IPCC, 2007). The magnitude of these projected changes varies from place to place (see Fig. 1). The broad-brush effects of warming are already observable across a wide var ...
... end of the current century, with increases in mean temperatures and in the frequency and magnitude of extreme temperature events (IPCC, 2007). The magnitude of these projected changes varies from place to place (see Fig. 1). The broad-brush effects of warming are already observable across a wide var ...
Nearshore soft-bottom Sensitivity
... and is considered to have moderate-high functional integrity, with only minor to moderate alterations, likely a result of compromised water quality. This habitat has moderate-high potential to resist climate impacts due to these characteristics, and may be able to recover moderately well due to the ...
... and is considered to have moderate-high functional integrity, with only minor to moderate alterations, likely a result of compromised water quality. This habitat has moderate-high potential to resist climate impacts due to these characteristics, and may be able to recover moderately well due to the ...
as a PDF
... et al. 2000). What we are concerned with here is the generality of that support in the light of more realistic assumptions about invasion biology. To test these assumptions, we utilized a standard Lotka–Volterra assembly model, similar to those used in past studies on biological invasions. These mod ...
... et al. 2000). What we are concerned with here is the generality of that support in the light of more realistic assumptions about invasion biology. To test these assumptions, we utilized a standard Lotka–Volterra assembly model, similar to those used in past studies on biological invasions. These mod ...
The vulnerability of provincially rare species (species-at
... or endangered under Ontario’s Endangered Species Act (Statutes of Ontario 2007), may be at risk of extirpation due to adverse effects of natural and/or anthropogenic stressors. Climate change, acting alone or in combination with other stressors, may pose an important emerging threat for many of thes ...
... or endangered under Ontario’s Endangered Species Act (Statutes of Ontario 2007), may be at risk of extirpation due to adverse effects of natural and/or anthropogenic stressors. Climate change, acting alone or in combination with other stressors, may pose an important emerging threat for many of thes ...
Notes for From Theory to Practice: Landscape
... If you’re only looking at climate models, you’re missing a big part of the picture All climate models have a high degree of uncertainty. For example, with data extrapolation, we often lose the variability (e.g., a big drought or other events) that we know and have measured to occur. People alone can ...
... If you’re only looking at climate models, you’re missing a big part of the picture All climate models have a high degree of uncertainty. For example, with data extrapolation, we often lose the variability (e.g., a big drought or other events) that we know and have measured to occur. People alone can ...
Developing New Morphological, Geographic, and
... status under several different species concepts. These new datasets can help in the development of new management plans for the protection of H. naniflora. Hexastylis naniflora is afforded protection under the Endangered Species Act (ESA) and was listed as a federally “threatened” species by the US ...
... status under several different species concepts. These new datasets can help in the development of new management plans for the protection of H. naniflora. Hexastylis naniflora is afforded protection under the Endangered Species Act (ESA) and was listed as a federally “threatened” species by the US ...
Identifying Critical Areas for Conservation: Biodiversity and Climate
... been victims of a disease caused by certain types of fungus. Recently, climatic changes in these areas have created more favorable conditions for the expansion of this fungus, hence placing these rare frogs under even more pressure (Pounds 2006). Models that demonstrate the intricacies of possible c ...
... been victims of a disease caused by certain types of fungus. Recently, climatic changes in these areas have created more favorable conditions for the expansion of this fungus, hence placing these rare frogs under even more pressure (Pounds 2006). Models that demonstrate the intricacies of possible c ...
Document
... tree seeds across a landscape with their droppings; and 4) Evolutionary connectivity, where the interaction of species with the broader environment permits adaptive and evolutionary changes. Connectivity conservation areas also help to maintain (Mackey et al. 2008b): 1) Ecological functional populat ...
... tree seeds across a landscape with their droppings; and 4) Evolutionary connectivity, where the interaction of species with the broader environment permits adaptive and evolutionary changes. Connectivity conservation areas also help to maintain (Mackey et al. 2008b): 1) Ecological functional populat ...
Section 3 overview of potential threats
... promote higher native species diversity. Shifts away from natural rates of variation can thus be a threat. Flows and flooding generates physical disturbance or fluctuation in habitats which can be important for ecological function, and involve processes such as flushing sediment and cleaning underwa ...
... promote higher native species diversity. Shifts away from natural rates of variation can thus be a threat. Flows and flooding generates physical disturbance or fluctuation in habitats which can be important for ecological function, and involve processes such as flushing sediment and cleaning underwa ...
Effect of Elevation and Type of Habitat on the Abundance and
... which most scarabaeoid dung beetles are active as adults in the study area (Romero-Alcaraz et al. 1998). These circumstances may become important in determining the spatial distribution of dung beetles along elevational or habitat gradients: elevation itself does not explain the patterns of abundanc ...
... which most scarabaeoid dung beetles are active as adults in the study area (Romero-Alcaraz et al. 1998). These circumstances may become important in determining the spatial distribution of dung beetles along elevational or habitat gradients: elevation itself does not explain the patterns of abundanc ...
1091-Lec8Fraga
... Habitat degradation - change that affects many but not all species - may be temporary Habitat transformation/conversion - refers to process of change ...
... Habitat degradation - change that affects many but not all species - may be temporary Habitat transformation/conversion - refers to process of change ...
Experimental Zoogeography of Islands
... colonist. This definition says nothing about whether food and a breeding site exist; a species whose propagule lands on one of our islands is a colonist even if it is doomed to quick extinction for purely physical reasons (e.g., the absence of a suitable nest site in the Rhizophora for a given speci ...
... colonist. This definition says nothing about whether food and a breeding site exist; a species whose propagule lands on one of our islands is a colonist even if it is doomed to quick extinction for purely physical reasons (e.g., the absence of a suitable nest site in the Rhizophora for a given speci ...
Community Ecology (Bio 3TT3) - McMaster Department of Biology
... fit here nicely. The non-overlapping situations are also of some interest because, depending on whether the species abut or are disjunct (distinctly separated) on the resource gradient, their potential for interaction is large or small if conditions slightly change. You ...
... fit here nicely. The non-overlapping situations are also of some interest because, depending on whether the species abut or are disjunct (distinctly separated) on the resource gradient, their potential for interaction is large or small if conditions slightly change. You ...
Small-mammal abundance at three elevations on a mountain in
... As part of a study of forest resilience to gypsy moth (Lymantria dispar) defoliation, small mammals were sampled with live (box) and pitfall traps for 16 years at three elevations on a mountain in west-central Vermont, USA. The more mesic, lowerslope location had the most diverse small-mammal commun ...
... As part of a study of forest resilience to gypsy moth (Lymantria dispar) defoliation, small mammals were sampled with live (box) and pitfall traps for 16 years at three elevations on a mountain in west-central Vermont, USA. The more mesic, lowerslope location had the most diverse small-mammal commun ...
File - Oxford Megafauna conference
... the largest number of dates for any extinct megafaunal species, allowing detailed mapping of range changes in the trajectory to extinction, although direct dates for North America outside Alaska/Yukon are few. Mammoths were widespread across northern Eurasia and Beringia for much of Greenland Stadia ...
... the largest number of dates for any extinct megafaunal species, allowing detailed mapping of range changes in the trajectory to extinction, although direct dates for North America outside Alaska/Yukon are few. Mammoths were widespread across northern Eurasia and Beringia for much of Greenland Stadia ...