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A hierarchical view of habitat and its relationship to species
A hierarchical view of habitat and its relationship to species

... Assumptions concerning species attributes relevant to the model interpretation apply only to habitats or regions whose species show one of the patterns described in the introduction. The assumptions are (1) that species differ in their ecological requirements and, thus, there will be some species wi ...
Lizard community structure across a grassland
Lizard community structure across a grassland

... few to no other shrubs and an abundance of bare soil. Larger creosote bush shrubs often had small patches of grass at their bases as well as packrat (Neotoma spp.) nests. Grassland sites were dominated by large grass clumps interspersed with smaller areas of bare soil, scattered small shrubs, and yu ...
Key Elements of Biodiversity in British Columbia
Key Elements of Biodiversity in British Columbia

... The Biodiversity Action Plan is identifying a range of different aspects of biodiversity that require focused management in order to maintain the biodiversity values in British Columbia. This background report was commissioned to explore the concept of biodiversity ‘key elements’ – those elements th ...
The amphibian decline crisis: A watershed for conservation
The amphibian decline crisis: A watershed for conservation

... of reliable data. Research into amphibian declines has focused on: (1) documentation at the landscape or population level; and (2) observational and experimental work on potential causes of declines. Although loss of habitat is known to have impacted amphibians for decades, recent research has focus ...
Non-optimal animal movement in human
Non-optimal animal movement in human

... habitat, patchy habitat with high-quality matrix, patchy habitat with low-quality matrix, and patchy, ephemeral habitat. Using this simplification I group the range of evolved movement parameters into four categories or movement types. I then discuss how these movement types interact with current hu ...
Climate Change Risk Assessment Comment
Climate Change Risk Assessment Comment

... Despite these issues and some concern over the varied level of analysis of the different impacts, participants provided a valuable review of the impacts list. Some general comments were that the list over-emphasized hydrological issues and that it was important to take account of other perspectives ...
The potential role of ecological corridors for habitat conservation in
The potential role of ecological corridors for habitat conservation in

... corridors have little potential for plants. Diaspore dispersal by livestock and wild mammals and birds is nevertheless important, and emphasis should be on maintaining animal movement within the landscape, especially in areas such as the Burren. The effectiveness of regional corridors is considerabl ...
the effect of habitat change on the structure of dung beetle
the effect of habitat change on the structure of dung beetle

... The effect of habitat transformation on dung beetle assemblages in the north-western Free State was investigated by comparing the fauna of a nature reserve (Sandveld Nature Reserve (SNR) (27°37'S;25°46'E» with that on neighbouring farms. Dung beetle sampling was done in four different localities wit ...
Guidelines for marine ranching and stock enhancement: Draft
Guidelines for marine ranching and stock enhancement: Draft

... All stock releases, whether of an introduced or transferred species, carry the danger of accidental introduction of disease causing agents andlor non-target species including pathogens, parasites and pest organisms to an area, with potentially highly detrimental effects on the ecosystem. It is impor ...
Interactions of components of habitats alter composition and
Interactions of components of habitats alter composition and

... Thus, any alteration to surface area (complexity) was confounded with altered heterogeneity in Beck’s (2000) experiments because it also altered the relative abundances of different types of pits. This suggests that altering components of habitat to test hypotheses about responses by assemblages of ...
Imperio et al 2012_Oikos
Imperio et al 2012_Oikos

... quality by fallow deer negatively affects the phenotypic quality of Italian roe deer at Castelporziano. Competition and facilitation for resources are widely accepted as mechanisms driving the spatial distribution of ungulate assemblages (Sinclair and Norton-Griffiths 1979). However, evidence for co ...
global strategy on invasive alien species
global strategy on invasive alien species

... 1. Global trade has enabled modern societies to benefit from the unprecedented movement and establishment of species around the world. Agriculture, forestry, fisheries, the pet trade, the horticultural industry, and many industrial consumers of raw materials today depend on species that are native t ...
Guideline on Pest Risk Analysis - GB non
Guideline on Pest Risk Analysis - GB non

... Common misconceptions about risk assessments To address a number of common misconceptions about non-native species risk assessments, the following points should be noted: Risk assessments consider only the risks posed by a species. They do not consider the practicalities, impacts or other issues rel ...
Younger Dryas Cladocera assemblages from two valley
Younger Dryas Cladocera assemblages from two valley

... 3). It seems possible that the above-mentioned warmer or milder environmental conditions during this interval gave rise to the observed changes in the valley mires. However, environmental changes can hamper Cladocera-based climate reconstructions (Korhola, 1999; Duigan & Birks, 2000; Bjerring et al. ...
Chapter 10: Protected Matters under the EPBC Act
Chapter 10: Protected Matters under the EPBC Act

... The surveying of burrow entrances may be more profitable in warmer months as the species is more active in the warmer weather. Watching burrows in cooler times of the year may involve setting up motion-sensing cameras to ‘watch’ for longer periods. McAlpin (2001b) reports the optimum time of year fo ...
A Demographic Study ofAloe dichotoma in the Succulent Karoo: Are
A Demographic Study ofAloe dichotoma in the Succulent Karoo: Are

... the Succulent Karoo'sbiodiversity (Myers et al. 2000), a new, more extreme and pervasive threat has recently been identified. Climate change scenarios for South Africa indicate that the Succulent Karoo biome will disappear almost completely from its current range along the western coastal and inland ...
The Known and Potential Effects of Climate Change on Biodiversity
The Known and Potential Effects of Climate Change on Biodiversity

... Global climate change has the potential to dramatically alter Ontario’s terrestrial ecosystems. We have identified three general classes of mechanisms that can affect species as a result of climate change: demographic, phenological, and genetic. Each of these classes can cause population expansions o ...
The Known and Potential Effects of Climate Change on Biodiversity
The Known and Potential Effects of Climate Change on Biodiversity

... Global climate change has the potential to dramatically alter Ontario’s terrestrial ecosystems. We have identified three general classes of mechanisms that can affect species as a result of climate change: demographic, phenological, and genetic. Each of these classes can cause population expansions o ...
Rusty Crayfish (Orconectes rusticus) - GB non
Rusty Crayfish (Orconectes rusticus) - GB non

... Common misconceptions about risk assessments ...
View - OhioLINK Electronic Theses and Dissertations Center
View - OhioLINK Electronic Theses and Dissertations Center

... environmental issues: climate change, pollution, habitat destruction, etc. One might consider these the principal environmental issues of our time, given the degree to which a vast portion of society sees them as problematic. Another issue of increasing concern to society, especially heading into th ...
Community-Level Effects of Climate Change on Ontario`s Terrestrial
Community-Level Effects of Climate Change on Ontario`s Terrestrial

... 2010). Climate change can amplify the effects of other major extinction drivers, such as habitat loss, disease, and invasive species. As well, species responses to climate change are connected through simultaneous interactions with other species or adjacent trophic levels (Harrington et al. 1999, Ty ...
Nasua nasua - CIRCABC
Nasua nasua - CIRCABC

... The origin of the established population in Majorca seems to be due to a single import of about eight individuals as pets, a decade earlier, which were located in a rural hotel, where an escape or release may have occurred (Mayol et al, 2009). Currently, the property no longer holds this species, ev ...
Species-Specific Responses of Carnivores to Human
Species-Specific Responses of Carnivores to Human

... birds, and mammals, including seven species of mammalian carnivores. Despite the lack of research studies, there is great concern that the destruction and modification of natural habitats has caused a reduction in the distribution and population numbers of these carnivores. The aim of this study was ...
Dear Colleague
Dear Colleague

... 145. What are the population dynamic consequences of delayed life-history effects in space and time? 146. What causes massive variability in recruitment? 147. What are the magnitudes of direct and indirect selection on reproductive strategies in the wild? 148. How does environmental stochasticity sh ...
- Wiley Online Library
- Wiley Online Library

... Understanding and predicting the dynamics of range expansion is a major topic in ecology both for invasive species extending their ranges into non-native regions and for species shifting their natural distributions as a consequence of climate change. In an increasingly modified landscape, a key ques ...
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Assisted colonization

Assisted colonization, also known as assisted migration or managed relocation, is the act of deliberately helping plant and animal species colonize new habitats when driven out of their historical habitats due to rapid environmental change, especially climate change. All species have some natural capacity to disperse into new habitats and adapt to change, but ongoing climate change is so rapid that many species are unable to keep pace naturally. In order to prevent extinctions, some scientists and practitioners are considering assisting the dispersal of species that have poor natural dispersal ability. This idea has sparked intense debate over the potential benefits of assisted colonization, which include avoiding many species extinctions, and the risks, which include accidentally introducing new invasive species. Although the debate remains primarily conceptual with few real-world applications, scientists and land managers have already begun to consider several specific assisted colonization projects.
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