Caribou
... Recent research efforts have increased the number of known populations to more than 64, and this number is expected to rise further as more individuals are radio-collared and distributions are delineated. Population surveys prior to 2002 estimate there are 33,000 forest-dwelling caribou in the Borea ...
... Recent research efforts have increased the number of known populations to more than 64, and this number is expected to rise further as more individuals are radio-collared and distributions are delineated. Population surveys prior to 2002 estimate there are 33,000 forest-dwelling caribou in the Borea ...
cheatgrass Bromus tectorum L.
... Role of disturbance in establishment: Open areas created by fires or anthropogenic disturbances are readily colonized by cheatgrass (Warner et al. 2003, Carpenter and Murray 2005). Potential for long-distance dispersal: Cheatgrass is spread by wind, and seeds can attach to animal fur or human clothi ...
... Role of disturbance in establishment: Open areas created by fires or anthropogenic disturbances are readily colonized by cheatgrass (Warner et al. 2003, Carpenter and Murray 2005). Potential for long-distance dispersal: Cheatgrass is spread by wind, and seeds can attach to animal fur or human clothi ...
Big frogs in small ponds
... Dr. Barone is an eloquent proponent of a unique narrative and arts-based approach to educational inquiry. His stories about schools and the people who live and work in them have become educational classics. Many of these stories appear in his recent book, Aesthetics, Politics and Educational Inquiry ...
... Dr. Barone is an eloquent proponent of a unique narrative and arts-based approach to educational inquiry. His stories about schools and the people who live and work in them have become educational classics. Many of these stories appear in his recent book, Aesthetics, Politics and Educational Inquiry ...
Comparison of ant communities (Hymenoptera: Formicidae) in
... and Myrmica with 4 species (19%) when all the habitat types are combined. Overall, we collected 19 species (90.5%) from forest steppe, 18 species (85.7%) from steppe, and 12 species (57.1%) from meadow. Based on occurrence data, the most common species were Formica candida, Myrmica kasczenkoi an ...
... and Myrmica with 4 species (19%) when all the habitat types are combined. Overall, we collected 19 species (90.5%) from forest steppe, 18 species (85.7%) from steppe, and 12 species (57.1%) from meadow. Based on occurrence data, the most common species were Formica candida, Myrmica kasczenkoi an ...
Full-Text PDF
... assumption becomes less and less appropriate. A lack of mixing generates neighborhoods around individuals that deviate from the spatial averages. Heterogeneity in local environmental conditions becomes especially important if organisms only interact over short distances. Another important dimension ...
... assumption becomes less and less appropriate. A lack of mixing generates neighborhoods around individuals that deviate from the spatial averages. Heterogeneity in local environmental conditions becomes especially important if organisms only interact over short distances. Another important dimension ...
Keystone species and food webs - Philosophical Transactions of the
... terms that makes objective studies more difficult. All of them acknowledge that there is a need for clarifying the most important species in ecosystems. Although, we should also delineate a difference between species that are important for nature (e.g. for maintaining ecosystem functions) and specie ...
... terms that makes objective studies more difficult. All of them acknowledge that there is a need for clarifying the most important species in ecosystems. Although, we should also delineate a difference between species that are important for nature (e.g. for maintaining ecosystem functions) and specie ...
Intraspecific genetic variation and species coexistence in plant
... understood by their amount of overlap in a multidimensional niche space made up of resources, natural enemies, time and space. When species show large niche overlap, their coexistence is challenged by the competitive exclusion principle, which predicts the extinction of the inferior competitor. The ...
... understood by their amount of overlap in a multidimensional niche space made up of resources, natural enemies, time and space. When species show large niche overlap, their coexistence is challenged by the competitive exclusion principle, which predicts the extinction of the inferior competitor. The ...
Habitat Conservation Area
... dive for fish in Wascana Lake to feed to their chicks. Terns are now seen only as spring and fall migrants, as the island no longer has the gravelly shore used as nesting sites, due to willow growth. Throughout the spring and summer American White Pelicans (Pelecanus erythrorhynchos) can be seen on ...
... dive for fish in Wascana Lake to feed to their chicks. Terns are now seen only as spring and fall migrants, as the island no longer has the gravelly shore used as nesting sites, due to willow growth. Throughout the spring and summer American White Pelicans (Pelecanus erythrorhynchos) can be seen on ...
15 Competition 2008
... 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intraspecific competition include decrease in growth, delay in reproduction, and decrease i ...
... 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intraspecific competition include decrease in growth, delay in reproduction, and decrease i ...
15 Competition 2008
... 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intraspecific competition include decrease in growth, delay in reproduction, and decrease i ...
... 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intraspecific competition include decrease in growth, delay in reproduction, and decrease i ...
Freshwater Jellyfish in Big Gull Lake by Lynda Corkum Cottagers
... What do they look like? There are two body forms of Freshwater Jellyfish, the polyp and medusa. Cottagers see the floating medusa stage, not the polyp. Watch for blooms of medusa in August and September when water is warm and prey are plentiful. Polyps, which form colonies, live on the bottom of l ...
... What do they look like? There are two body forms of Freshwater Jellyfish, the polyp and medusa. Cottagers see the floating medusa stage, not the polyp. Watch for blooms of medusa in August and September when water is warm and prey are plentiful. Polyps, which form colonies, live on the bottom of l ...
Notes and Comments
... et al. 1999). Lehman and Tilman (2000) argued that temporal stability at the community level responds differently to changes in species richness than at the population level. Specifically, they showed that species diversity increased the stability of a community but reduced the stability of individu ...
... et al. 1999). Lehman and Tilman (2000) argued that temporal stability at the community level responds differently to changes in species richness than at the population level. Specifically, they showed that species diversity increased the stability of a community but reduced the stability of individu ...
Documentos a serem entregues pelo SWG “Mosquitoes”
... malaria and dengue, it may not be likely that other host species will be affected by LM mosquitoes. More information is needed in cases involving other mosquito species and the environments where the LM mosquitoes are likely to be released. In many of these environments few studies have been conduct ...
... malaria and dengue, it may not be likely that other host species will be affected by LM mosquitoes. More information is needed in cases involving other mosquito species and the environments where the LM mosquitoes are likely to be released. In many of these environments few studies have been conduct ...
A mini review on theories and measures of interspecific associations
... trophic levels. However, they occur mostly at the same trophic level in plant communities. Regardless of the methods used, we always focus on negative/positive/no significant associations, and the extent of these associations. 2.1 Overall interspecific associations of plant species Research on inter ...
... trophic levels. However, they occur mostly at the same trophic level in plant communities. Regardless of the methods used, we always focus on negative/positive/no significant associations, and the extent of these associations. 2.1 Overall interspecific associations of plant species Research on inter ...
Crassostrea gigas, Pacific oyster - GB non
... other intertidal species. In the Dutch Wadden Sea and more recently in the GB the oysters have started to form reefs consisting of dense layers which can alter the natural state of the ecosystem, posing a potential threat to native species and altering habitats, some of which are protected under Eur ...
... other intertidal species. In the Dutch Wadden Sea and more recently in the GB the oysters have started to form reefs consisting of dense layers which can alter the natural state of the ecosystem, posing a potential threat to native species and altering habitats, some of which are protected under Eur ...
Translocation strategies for multiple species depend on interspecific
... Although ignored in translocation guidelines, multispecies translocations already occur frequently. Predator-free areas are scarce and expensive to create (Bode and Wintle 2010), and the increasing number of threatened species encourages managers to move competing species into the same reserves. In ...
... Although ignored in translocation guidelines, multispecies translocations already occur frequently. Predator-free areas are scarce and expensive to create (Bode and Wintle 2010), and the increasing number of threatened species encourages managers to move competing species into the same reserves. In ...
Parasitology Meets Ecology on Its Own Terms
... hosts acquiring the infection in 1 time interval are now removed from the susceptible pool for subsequent intervals. Incidence is most commonly used to monitor the spread of clinical disease in populations of humans or domestic animals because determining the number of preexisting cases of the disea ...
... hosts acquiring the infection in 1 time interval are now removed from the susceptible pool for subsequent intervals. Incidence is most commonly used to monitor the spread of clinical disease in populations of humans or domestic animals because determining the number of preexisting cases of the disea ...
Species-specific positive effects in an annual plant
... et al. 1999), and this is more tractable in certain life-forms. Furthermore, it has been argued that removal experiments are superior to additions since communities are formed by many processes, not just simple addition, removals inform on the importance of non-random species loss within systems, an ...
... et al. 1999), and this is more tractable in certain life-forms. Furthermore, it has been argued that removal experiments are superior to additions since communities are formed by many processes, not just simple addition, removals inform on the importance of non-random species loss within systems, an ...
habitat loss, trophic collapse, and the decline of ecosystem services
... We have used the list of ecosystem goods and services developed by the Millennium Ecosystem Assessment as the basis of our list of services provided by different natural and human-modified ecosystems (Table 1; Millennium Ecosystem Assessment 2003). We have then classified the response of ecosystem ser ...
... We have used the list of ecosystem goods and services developed by the Millennium Ecosystem Assessment as the basis of our list of services provided by different natural and human-modified ecosystems (Table 1; Millennium Ecosystem Assessment 2003). We have then classified the response of ecosystem ser ...
chapter 9 biological invasions and the homogenization of faunas
... million years (0.00003 per year) prior to human settlement, but increased to 20,000 species per million years (0.02 per year) after the arrival of the Polynesians and to approximately 20 per year during the past two centuries (Ricciardi, 2007). In other words, contemporary rates of biological invasi ...
... million years (0.00003 per year) prior to human settlement, but increased to 20,000 species per million years (0.02 per year) after the arrival of the Polynesians and to approximately 20 per year during the past two centuries (Ricciardi, 2007). In other words, contemporary rates of biological invasi ...
150. Woodruff, D.S. Biodiversity: conservation and genetics. In
... reflects a failure of managers to appreciate the risks involved in ignoring genetics and a real shortage of sufficiently motivated geneticists. Another problem is more insidious and reflects the inadequacies of the infant science of conservation genetics. Often laboratory studies provided managers w ...
... reflects a failure of managers to appreciate the risks involved in ignoring genetics and a real shortage of sufficiently motivated geneticists. Another problem is more insidious and reflects the inadequacies of the infant science of conservation genetics. Often laboratory studies provided managers w ...
Introductory Research Essay - Epsilon Open Archive
... Care pilulifer, Chimaphilia umbellate, Geranium bohemicum and Geranium lanuginosum (Anonymous 2006). So far, no vascular plants have gone extinct, but declines in species abundance have been observed (Esseen et al. 1997). Individuals of an endangered species, left in an environment with an altered d ...
... Care pilulifer, Chimaphilia umbellate, Geranium bohemicum and Geranium lanuginosum (Anonymous 2006). So far, no vascular plants have gone extinct, but declines in species abundance have been observed (Esseen et al. 1997). Individuals of an endangered species, left in an environment with an altered d ...
Community 1 A
... • Pathogens can have dramatic effects on communities – For example, coral reef communities are being decimated by white-band disease ...
... • Pathogens can have dramatic effects on communities – For example, coral reef communities are being decimated by white-band disease ...
Island restoration
The ecological restoration of islands, or island restoration, is the application of the principles of ecological restoration to islands and island groups. Islands, due to their isolation, are home to many of the world's endemic species, as well as important breeding grounds for seabirds and some marine mammals. Their ecosystems are also very vulnerable to human disturbance and particularly to introduced species, due to their small size. Island groups such as New Zealand and Hawaii have undergone substantial extinctions and losses of habitat. Since the 1950s several organisations and government agencies around the world have worked to restore islands to their original states; New Zealand has used them to hold natural populations of species that would otherwise be unable to survive in the wild. The principal components of island restoration are the removal of introduced species and the reintroduction of native species.