Common Wall Lizard (Podarcis muralis) - GB non
... Consider only the risks (i.e. the chance and severity of a hazard occurring) posed by a species. They do not consider the practicalities, impacts or other issues relating to the management of the species. They also only consider only the negative impacts of the species, they do not consider any po ...
... Consider only the risks (i.e. the chance and severity of a hazard occurring) posed by a species. They do not consider the practicalities, impacts or other issues relating to the management of the species. They also only consider only the negative impacts of the species, they do not consider any po ...
Where The Wild Extinctions Are
... Wilson's predictions of over thirty continental bird and mammal extinctions per year, each and every year. Even if his numbers were off by an order of magnitude, we should be seeing more than 3 continental extinctions per year from habitat reduction since at least 1900, around 300 continental extinc ...
... Wilson's predictions of over thirty continental bird and mammal extinctions per year, each and every year. Even if his numbers were off by an order of magnitude, we should be seeing more than 3 continental extinctions per year from habitat reduction since at least 1900, around 300 continental extinc ...
Preview Sample 2
... Snakeheads are top predators, and 90% of the northern snakeheads' diet consists of other fishes. The northern snakehead can breathe out of water and travel short distances (about 100 feet) across land. They also breed rapidly. Females can lay more than 100,000 eggs per year. Juveniles have also been ...
... Snakeheads are top predators, and 90% of the northern snakeheads' diet consists of other fishes. The northern snakehead can breathe out of water and travel short distances (about 100 feet) across land. They also breed rapidly. Females can lay more than 100,000 eggs per year. Juveniles have also been ...
Complex community and evolutionary responses to habitat
... meta-analysis found increased consumption in edge habitats compared to interiors [8]. Notably, this increased topdown effect was driven primarily by herbivores feeding on plants, and in particular by dietary generalists, not specialists. Further, this meta-analysis found no evidence that higher tr ...
... meta-analysis found increased consumption in edge habitats compared to interiors [8]. Notably, this increased topdown effect was driven primarily by herbivores feeding on plants, and in particular by dietary generalists, not specialists. Further, this meta-analysis found no evidence that higher tr ...
Long-billed Curlew (Numenius americanus)
... 2010; see Table 2). Grasslands cover less than 1% of BC (Grassland Conservation Council 2002) and Long-billed Curlew habitat is primarily found on private land (J. Surgenor pers. comm. 2010). In Saskatchewan, only 20 percent of the native prairie remains and 85% of the remaining 12.5 million acres o ...
... 2010; see Table 2). Grasslands cover less than 1% of BC (Grassland Conservation Council 2002) and Long-billed Curlew habitat is primarily found on private land (J. Surgenor pers. comm. 2010). In Saskatchewan, only 20 percent of the native prairie remains and 85% of the remaining 12.5 million acres o ...
Species at Risk Database Management System
... large aggregations, lengthy migrations, and significant cultural and social value to northern Aboriginal Peoples and other Canadians, its 14-15 subpopulations range from northeastern Alaska to western Hudson Bay and Baffin Island. Numbering more than 2 million individuals in the early 1990s, the cur ...
... large aggregations, lengthy migrations, and significant cultural and social value to northern Aboriginal Peoples and other Canadians, its 14-15 subpopulations range from northeastern Alaska to western Hudson Bay and Baffin Island. Numbering more than 2 million individuals in the early 1990s, the cur ...
minimum group size and other conservation
... fluctuations or by reducing predation risk Although there has been a general decline of numbers and groups of vervet monkeys with the disappearance of fever tree woodlands in Amboseli (Isbell et al., 1991), exceptions to this trend were the vervet groups that lived near the tourist lodges. Food avai ...
... fluctuations or by reducing predation risk Although there has been a general decline of numbers and groups of vervet monkeys with the disappearance of fever tree woodlands in Amboseli (Isbell et al., 1991), exceptions to this trend were the vervet groups that lived near the tourist lodges. Food avai ...
4.0 Billion Years of Earth Environmental Change
... animals were moving out of areas they had lived in and into new areas. Communities were coming apart and reorganizing. Many scientists think that these climatic and ecosystem changes caused the extinctions at the end of the Pleistocene. The environmental changes might have caused extinction by elimi ...
... animals were moving out of areas they had lived in and into new areas. Communities were coming apart and reorganizing. Many scientists think that these climatic and ecosystem changes caused the extinctions at the end of the Pleistocene. The environmental changes might have caused extinction by elimi ...
Chapter 1
... of habitat destruction. On the other hand, Palearctic birds have been attributed with strong flexibility in habitat use on their winter grounds, occupying a wider range of habitat types and employing a higher diversity of foraging techniques, even profiting from anthropogenic habitat alteration (More ...
... of habitat destruction. On the other hand, Palearctic birds have been attributed with strong flexibility in habitat use on their winter grounds, occupying a wider range of habitat types and employing a higher diversity of foraging techniques, even profiting from anthropogenic habitat alteration (More ...
Savanna herbivore dynamics in a livestock
... remaining in Kenya that are hybrid between two morphotypes (A. b. cokei and A. b. lelwel), the remainder having been extirpated by human population growth, habitat loss and land use changes. Hartebeest is therefore a flagship species for Laikipia, and will require informed management intervention to ...
... remaining in Kenya that are hybrid between two morphotypes (A. b. cokei and A. b. lelwel), the remainder having been extirpated by human population growth, habitat loss and land use changes. Hartebeest is therefore a flagship species for Laikipia, and will require informed management intervention to ...
Interactive effects of habitat modification and species invasion on
... availability in model simulations [23] suggests that even a comparatively small increase in habitat change over time can lead to an abrupt increase in invader abundance. In practice, whether the relationship between habitat modification and invasive abundance is linear or non-linear is species and c ...
... availability in model simulations [23] suggests that even a comparatively small increase in habitat change over time can lead to an abrupt increase in invader abundance. In practice, whether the relationship between habitat modification and invasive abundance is linear or non-linear is species and c ...
Evidence for the Role of Infectious Disease in Species Extinction
... infectious disease in global species loss. Infectious disease was listed as a contributing factor in <4% of species extinctions known to have occurred since 1500 (833 plants and animals) and as contributing to a species’ status as critically endangered in <8% of cases (2852 critically endangered pla ...
... infectious disease in global species loss. Infectious disease was listed as a contributing factor in <4% of species extinctions known to have occurred since 1500 (833 plants and animals) and as contributing to a species’ status as critically endangered in <8% of cases (2852 critically endangered pla ...
Wild Bird Populations in the UK - Government Statistical Service
... populations declined most rapidly. Some farming practices still have negative impacts on bird populations, but farmers can and do take positive steps to conserve birds on their land. In particular, a number of incentive schemes4 encourage improved environmental stewardship in farming, with some meas ...
... populations declined most rapidly. Some farming practices still have negative impacts on bird populations, but farmers can and do take positive steps to conserve birds on their land. In particular, a number of incentive schemes4 encourage improved environmental stewardship in farming, with some meas ...
gopher tortoise - Wildlife Resources Division
... and silvicultural activities, urban sprawl, and fire suppression has eliminated many populations and isolated most others. It has been estimated that the average female gopher tortoise in Georgia has an effective rate of reproduction of about 5.8 hatchlings per 10 years, assuming annual egg laying. ...
... and silvicultural activities, urban sprawl, and fire suppression has eliminated many populations and isolated most others. It has been estimated that the average female gopher tortoise in Georgia has an effective rate of reproduction of about 5.8 hatchlings per 10 years, assuming annual egg laying. ...
Full text in pdf format
... Solbergstrand mesocosms; see Bakke et al. 1988, Warwick et al. 1988, and other papers in this MEPS SPECIAL). Alternatively, prior knowledge of well-established causal links between pollutants and their known effects would suffice to demonstrate that pollutants caused the observed dfferences. For mos ...
... Solbergstrand mesocosms; see Bakke et al. 1988, Warwick et al. 1988, and other papers in this MEPS SPECIAL). Alternatively, prior knowledge of well-established causal links between pollutants and their known effects would suffice to demonstrate that pollutants caused the observed dfferences. For mos ...
Global Population Dynamics and Hot Spots of Response to Climate
... of influence of the NAO on local temperature variation throughout the Northern Hemisphere. These analyses also revealed a general trade-off across the distribution of this species between the strength of density-dependent selfregulation and abiotic limitation. The populations that were apparently mo ...
... of influence of the NAO on local temperature variation throughout the Northern Hemisphere. These analyses also revealed a general trade-off across the distribution of this species between the strength of density-dependent selfregulation and abiotic limitation. The populations that were apparently mo ...
Responses of Foothill Yellow-legged Frog (Rana boylii
... Statistical analysis.—We examined initial and overall responses of larvae to treatments. Initial responses were activity data from the first two observations (the first four min of a trial); overall responses were data from all five observations over ten minutes. The sum of the number of gridlines c ...
... Statistical analysis.—We examined initial and overall responses of larvae to treatments. Initial responses were activity data from the first two observations (the first four min of a trial); overall responses were data from all five observations over ten minutes. The sum of the number of gridlines c ...
Submission - Friends of Felton
... habitat demonstrated in development planning” throughout the species’ range. A deficiency in the Queensland Vegetation Management Act 1999 (VMA) is that vegetation communities that are key habitat for koalas within the Felton district are listed as ‘not of concern’. The VMA is the Queensland legisla ...
... habitat demonstrated in development planning” throughout the species’ range. A deficiency in the Queensland Vegetation Management Act 1999 (VMA) is that vegetation communities that are key habitat for koalas within the Felton district are listed as ‘not of concern’. The VMA is the Queensland legisla ...
Document
... populations are a recurring theme in this book, as are reflections and recommendations on how to target and address them to empower conservation strategies for the species. ...
... populations are a recurring theme in this book, as are reflections and recommendations on how to target and address them to empower conservation strategies for the species. ...
Peace Basin Species of Interest Action Plan
... While the FWCP is not responsible for population management, this plan proposes objectives and actions to improve our understanding of limiting factors, and to support other planning and management initiatives aimed at improving conditions and/or increasing populations of species-atrisk, ungulates, ...
... While the FWCP is not responsible for population management, this plan proposes objectives and actions to improve our understanding of limiting factors, and to support other planning and management initiatives aimed at improving conditions and/or increasing populations of species-atrisk, ungulates, ...
Evaluating the functional importance of secretive species: A case
... (mass) for each individual snake captured in at least two primary periods (months) within a season by dividing the change in mass by the number of days elapsed between captures. Because captures of Seminatrix were very low in March, we assessed growth in this species during only three periods (late ...
... (mass) for each individual snake captured in at least two primary periods (months) within a season by dividing the change in mass by the number of days elapsed between captures. Because captures of Seminatrix were very low in March, we assessed growth in this species during only three periods (late ...
Impact of maximum sustainable yield on competitive community
... value decreases toward the MSY of one population. In the next example (Fig. 2) we investigate how TMSY affects populations characterized by a considerable difference in biotic potential (r1 ¼1, r2 ¼5). For a relatively small value of ab (ab ¼0.06) TMSY is obtained (Fig. 2a), both populations are pos ...
... value decreases toward the MSY of one population. In the next example (Fig. 2) we investigate how TMSY affects populations characterized by a considerable difference in biotic potential (r1 ¼1, r2 ¼5). For a relatively small value of ab (ab ¼0.06) TMSY is obtained (Fig. 2a), both populations are pos ...
Great Basin Spadefoot Toad - Province of British Columbia
... he Great Basin Spadefoot Toad is restricted in Canada to dry grassland valleys in south-central British Columbia, with the Okanagan Valley having the largest population concentration. The low-elevation dry grasslands of the Okanagan are one of Canada’s most endangered ecosystems with less than nine ...
... he Great Basin Spadefoot Toad is restricted in Canada to dry grassland valleys in south-central British Columbia, with the Okanagan Valley having the largest population concentration. The low-elevation dry grasslands of the Okanagan are one of Canada’s most endangered ecosystems with less than nine ...
Decline in amphibian populations
Since the 1980s, declines in amphibian populations, including population crashes and mass localized extinctions, have been noted from locations all over the world. These declines are perceived as one of the most critical threats to global biodiversity, and several causes are believed to be involved, including disease, habitat destruction and modification, exploitation, pollution, pesticide use, introduced species, and ultraviolet-B radiation (UV-B). However, many of the causes of amphibian declines are still poorly understood, and the topic is currently a subject of much ongoing research. Calculations based on extinction rates suggest that the current extinction rate of amphibians could be 211 times greater than the background extinction rate and the estimate goes up to 25,000–45,000 times if endangered species are also included in the computation.