![The ecology of inland waters](http://s1.studyres.com/store/data/006327031_1-b9e059904b86a2a0039013d11a8934e3-300x300.png)
The ecology of inland waters
... World Heritage Site. The relatively small size of the meeting, and the fact that everyone made a presentation, and no one was there only as a member of the audience, helped to foster an atmosphere of interaction and less sense of hierarchy between very experienced and early career scientists. Scient ...
... World Heritage Site. The relatively small size of the meeting, and the fact that everyone made a presentation, and no one was there only as a member of the audience, helped to foster an atmosphere of interaction and less sense of hierarchy between very experienced and early career scientists. Scient ...
Full-text PDF - Association for the Sciences of Limnology
... particles per species. Unfortunately, Brunchioasychis americana is so rare at this latitude that as many as 25 individuals have not been collected. No data on the gut contents of this species are available. The measurements were grouped into the same six size classes used for tubes and parent sedime ...
... particles per species. Unfortunately, Brunchioasychis americana is so rare at this latitude that as many as 25 individuals have not been collected. No data on the gut contents of this species are available. The measurements were grouped into the same six size classes used for tubes and parent sedime ...
Why Are HEALTHY ECOSYSTEMS Important?
... its having an exceptional management team, overseen and guided by a knowledgeable, experienced leader. Wacho will be responsible for planning, development, and execution of research and management projects; collaboration and coordination with the park, scientists, and others; data analysis and commu ...
... its having an exceptional management team, overseen and guided by a knowledgeable, experienced leader. Wacho will be responsible for planning, development, and execution of research and management projects; collaboration and coordination with the park, scientists, and others; data analysis and commu ...
COMPETITION
... when small to eating small fish as grows). Also changes Interspecific relationships ie. Interspecific competition. Principle of Competitive Exclusion: postulated by Gause 1934. Complete competitors cannot cowxist.as a result of competition two species hardly ever occupy ...
... when small to eating small fish as grows). Also changes Interspecific relationships ie. Interspecific competition. Principle of Competitive Exclusion: postulated by Gause 1934. Complete competitors cannot cowxist.as a result of competition two species hardly ever occupy ...
Food web structure and the evolution of ecological communities
... system itself may be inherently unstable and subject to large scale avalanches of extinctions (Bak & Sneppen, 1993; Solé et al. 1997). Theoretical models of macro-evolution and extinction have been reviewed recently by Drossel (2001). It is not surprising that changes in the non-living environment ...
... system itself may be inherently unstable and subject to large scale avalanches of extinctions (Bak & Sneppen, 1993; Solé et al. 1997). Theoretical models of macro-evolution and extinction have been reviewed recently by Drossel (2001). It is not surprising that changes in the non-living environment ...
1" 2" 3" Phylogenetic diversity promotes ecosystem stability 4" 5" 6
... diversity (Hed) that is based on the relative distribution of evolutionary distinctiveness in ...
... diversity (Hed) that is based on the relative distribution of evolutionary distinctiveness in ...
Evolutionary food web model based on body masses gives realistic
... Even if a newly emerging species is slightly better adapted to the resources and therefore displaces a species of similar body mass, it has the same feeding preferences and hence the same function in the food web, leading to a very low species turnover without secondary extinctions [15]. The network ...
... Even if a newly emerging species is slightly better adapted to the resources and therefore displaces a species of similar body mass, it has the same feeding preferences and hence the same function in the food web, leading to a very low species turnover without secondary extinctions [15]. The network ...
here - Western Australian Museum
... once visited and vice versa, hence the only reliable way to assess an area was to visit it. As such, virtually every accessible creek, drainage line, swamp or seepage with some degree of native vegetation remaining within the search area was examined. An important corollary here is that non-detectio ...
... once visited and vice versa, hence the only reliable way to assess an area was to visit it. As such, virtually every accessible creek, drainage line, swamp or seepage with some degree of native vegetation remaining within the search area was examined. An important corollary here is that non-detectio ...
Illumination–size relationships of 109 coexisting
... encounter at large sizes. Third, photosynthetic efficiency is constrained through ontogeny, i.e. a species cannot derive maximum energy from both high light as an adult and from low light while a juvenile. Based on these points, Givnish (1988) argues that species that can become very large adult tre ...
... encounter at large sizes. Third, photosynthetic efficiency is constrained through ontogeny, i.e. a species cannot derive maximum energy from both high light as an adult and from low light while a juvenile. Based on these points, Givnish (1988) argues that species that can become very large adult tre ...
`wild` plant and animal resources by small-scale pre
... worldwide, is a general effort to alter the overall composition of vegetation communities in order to increase the relative abundance of early successional stage plants that provide a source of food for either humans or animals that play a role in human economies, at the expense of other species of ...
... worldwide, is a general effort to alter the overall composition of vegetation communities in order to increase the relative abundance of early successional stage plants that provide a source of food for either humans or animals that play a role in human economies, at the expense of other species of ...
The Spread, Effect and Mitigation of Bullfrogs
... A study done by Hayes and Jennings indicates bullfrogs may not be the cause Habitat loss, fragmentation and pollution may also be factors Other predators may also be to blame Disease is also a major player Bottom line we really don’t have a clear answer…interspecific relationships are complex ...
... A study done by Hayes and Jennings indicates bullfrogs may not be the cause Habitat loss, fragmentation and pollution may also be factors Other predators may also be to blame Disease is also a major player Bottom line we really don’t have a clear answer…interspecific relationships are complex ...
CT_PlantStewIndex_090930
... “conservative” species, which may grow only in specialized habitats, such as serpentine barrens or the pine barrens of New Jersey. For all of New Jersey and the Piedmont region of Pennsylvania, over 2000 plants have been catalogued and assigned a number from zero to ten by local experts and botanist ...
... “conservative” species, which may grow only in specialized habitats, such as serpentine barrens or the pine barrens of New Jersey. For all of New Jersey and the Piedmont region of Pennsylvania, over 2000 plants have been catalogued and assigned a number from zero to ten by local experts and botanist ...
Phylogenetic structure of plant species pools reflects habitat age on
... community types occurring in the country, comprising a total of 2306 species, using the mean phylogenetic distance (MPD) between all pairs of species found in each species pool, and compared the PS of these species pools with the relative ages of their habitats. Results: Clustered PS was observed co ...
... community types occurring in the country, comprising a total of 2306 species, using the mean phylogenetic distance (MPD) between all pairs of species found in each species pool, and compared the PS of these species pools with the relative ages of their habitats. Results: Clustered PS was observed co ...
Chapter 266 - Global Declines of Amphibians
... population declines and even extinctions of amphibian species around the world. Assessments of the world’s amphibians (Stuart et al., 2004, 2008) found that nearly a third of the known species of amphibians are globally threatened with extinction and that at least 42% of known amphibian species are ...
... population declines and even extinctions of amphibian species around the world. Assessments of the world’s amphibians (Stuart et al., 2004, 2008) found that nearly a third of the known species of amphibians are globally threatened with extinction and that at least 42% of known amphibian species are ...
to the complete programme with abstracts
... main genera (Amynthas and Metaphire) were supported as monophyletic. The result of the divergence time analyses estimated by Bayesian method suggesting a speciation radiation of Megascolecidae earthworms after the Cretaceous–Palaeogene mass extinction. Species richness increased sustainedly during C ...
... main genera (Amynthas and Metaphire) were supported as monophyletic. The result of the divergence time analyses estimated by Bayesian method suggesting a speciation radiation of Megascolecidae earthworms after the Cretaceous–Palaeogene mass extinction. Species richness increased sustainedly during C ...
Interspecific interactions through 2 million years: are competitive
... (electronic supplementary material, table S1). The sampled TSTs are typically siliciclastic sand-rich deposits up to several metres thick. Bivalves are by far the most common macroscopic components of the shellbeds we targeted [24,25]. We collected as many bivalve shells as possible that contained c ...
... (electronic supplementary material, table S1). The sampled TSTs are typically siliciclastic sand-rich deposits up to several metres thick. Bivalves are by far the most common macroscopic components of the shellbeds we targeted [24,25]. We collected as many bivalve shells as possible that contained c ...
Intraspecific genetic variation and species coexistence in plant
... those that reduce the mean fitness differences between interacting species, thereby delaying a competitively deterministic winner and promoting long-term coexistence. Stabilizing mechanisms are those that favour species when they become rare and increase intraspecific competition relative to intersp ...
... those that reduce the mean fitness differences between interacting species, thereby delaying a competitively deterministic winner and promoting long-term coexistence. Stabilizing mechanisms are those that favour species when they become rare and increase intraspecific competition relative to intersp ...
A meta-analysis of trait differences between invasive and non
... these studies compared invasive alien species to noninvasive alien species, mostly related ones. The other 111 studies compared invasive alien species to native species. Surprisingly, the criteria for selection of the native species were frequently not mentioned explicitly. However, implicitly it ap ...
... these studies compared invasive alien species to noninvasive alien species, mostly related ones. The other 111 studies compared invasive alien species to native species. Surprisingly, the criteria for selection of the native species were frequently not mentioned explicitly. However, implicitly it ap ...
Linking Nature`s services to ecosystems: some general ecological
... at desirable levels, one must know how these specific groups of organisms are dependent on other species and how the physical environment affects them. In the following section on maintenance of population densities, I examine four key concepts from population and community ecology, i.e. regulation ...
... at desirable levels, one must know how these specific groups of organisms are dependent on other species and how the physical environment affects them. In the following section on maintenance of population densities, I examine four key concepts from population and community ecology, i.e. regulation ...
Ranchers as a Keystone Species in a West That Works By Richard L
... that perforated the previously intact rangelands.12 This observation led us to wonder how biodiversity, from songbirds to carnivores to plants, differed across the principle land uses of today’s West. Accordingly, we examined these taxa on a landscape that was part ranchland, part exurban developmen ...
... that perforated the previously intact rangelands.12 This observation led us to wonder how biodiversity, from songbirds to carnivores to plants, differed across the principle land uses of today’s West. Accordingly, we examined these taxa on a landscape that was part ranchland, part exurban developmen ...
NSW Invasive Species Plan 2008-2015
... much of this loss. With new pests being detected all the time, invasive species represent one of the greatest threats to biodiversity in Australia. Pests also cause financial losses to agriculture and other industries and damage areas of cultural significance. Managing the impacts of pests is an iss ...
... much of this loss. With new pests being detected all the time, invasive species represent one of the greatest threats to biodiversity in Australia. Pests also cause financial losses to agriculture and other industries and damage areas of cultural significance. Managing the impacts of pests is an iss ...
Determinants of Distribution
... environmental conditions in which a taxon survives and reproduces in nature, including biotic factors (competition, predation, mutualism, etc). In a range isolated from the Andes: - low elevation species present, high elevation species absent - low elevation species expands its range upward Ecologic ...
... environmental conditions in which a taxon survives and reproduces in nature, including biotic factors (competition, predation, mutualism, etc). In a range isolated from the Andes: - low elevation species present, high elevation species absent - low elevation species expands its range upward Ecologic ...
Chapter 5: Ecology and evolution: Populations, communities, and
... species is a particular type of organism, or more precisely, a population or group of populations whose members share certain characteristics and can freely breed with one another and produce fertile offspring. Scientists have described between 1.5 million and 1.8 million species, but there are many ...
... species is a particular type of organism, or more precisely, a population or group of populations whose members share certain characteristics and can freely breed with one another and produce fertile offspring. Scientists have described between 1.5 million and 1.8 million species, but there are many ...
Introduced species
![](https://commons.wikimedia.org/wiki/Special:FilePath/Melilotus_alba_bgiu.jpg?width=300)
An introduced, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are called invasive species. Some have a negative effect on a local ecosystem. Some introduced species may have no negative effect or only minor impact. Some species have been introduced intentionally to combat pests. They are called biocontrols and may be regarded as beneficial as an alternative to pesticides in agriculture for example. In some instances the potential for being beneficial or detrimental in the long run remains unknown. A list of some introduced species is given in a separate article.The effects of introduced species on natural environments have gained much scrutiny from scientists, governments, farmers and others.