Western Brook Lamprey
... Length: 10-15 cm. Colouration is silver in immature individuals darkening to a slate-grey, brown or black dorsal colouration as they mature sexually. The ventral area on most age classes is pale grey to white. Adults of the parasitic form remain silver and do not become fully coloured and sexually m ...
... Length: 10-15 cm. Colouration is silver in immature individuals darkening to a slate-grey, brown or black dorsal colouration as they mature sexually. The ventral area on most age classes is pale grey to white. Adults of the parasitic form remain silver and do not become fully coloured and sexually m ...
Open or download EMP bulletin as a PDF file
... A problem conservationists face is not always knowing what the most important management actions are for conserving native insects, especially when you’re talking about large numbers of species that make up insect communities, as opposed to focal species or groups that may have more specific needs a ...
... A problem conservationists face is not always knowing what the most important management actions are for conserving native insects, especially when you’re talking about large numbers of species that make up insect communities, as opposed to focal species or groups that may have more specific needs a ...
Individualscale variation, speciesscale differences: inference
... conditional to marginal, but the rank of species mean values reverses from marginal in Fig. 2e to conditional in Fig. 2c. The answer to the original question (which species occupies the wetter sites?) is, in aggregate, beech. This is the answer we obtain if we ignore temperature. Conditional on warm ...
... conditional to marginal, but the rank of species mean values reverses from marginal in Fig. 2e to conditional in Fig. 2c. The answer to the original question (which species occupies the wetter sites?) is, in aggregate, beech. This is the answer we obtain if we ignore temperature. Conditional on warm ...
Protists in soil ecology and forest nutrient cycling
... to assume that species composition at the site will not vary from day to day or even over several months. However, the active species from the pool of total encysted species at that site will vary as conditions change. In this situation, the dynamics of populations through active–inactive cycles are ...
... to assume that species composition at the site will not vary from day to day or even over several months. However, the active species from the pool of total encysted species at that site will vary as conditions change. In this situation, the dynamics of populations through active–inactive cycles are ...
The Ethics of Reviving Long Extinct Species
... successful, does not restore these relationships. It only results in organisms whose genetic makeup most resembles that of species that went extinct long ago. For this reason, on some conceptions of species, the organisms resulting from de-extinction may not even be conspecific with the species that ...
... successful, does not restore these relationships. It only results in organisms whose genetic makeup most resembles that of species that went extinct long ago. For this reason, on some conceptions of species, the organisms resulting from de-extinction may not even be conspecific with the species that ...
Keystone species and food webs - Philosophical Transactions of the
... Beyeler 2001). All of these concepts are probably useful for some purposes, but it is the very diversity of these 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 delineat ...
... Beyeler 2001). All of these concepts are probably useful for some purposes, but it is the very diversity of these 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 delineat ...
of the spaw protocol - Caribbean Environment Programme
... Birdlife International in collaboration with the SPAW/RAC The IUCN Red List of threatened species is widely considered to be the most objective and authoritative system for classifying species in terms of the risk of extinction. Information on a taxon's population size, population trends and range s ...
... Birdlife International in collaboration with the SPAW/RAC The IUCN Red List of threatened species is widely considered to be the most objective and authoritative system for classifying species in terms of the risk of extinction. Information on a taxon's population size, population trends and range s ...
The evolutionary consequences of biological
... among invasive ants relative to ants as a whole remains to be tested. Having a shared history with humans may also make a species more likely to invade new environments (Elton 1958). In addition to being preadapted to human modified landscapes, a close association with humans increases the probabili ...
... among invasive ants relative to ants as a whole remains to be tested. Having a shared history with humans may also make a species more likely to invade new environments (Elton 1958). In addition to being preadapted to human modified landscapes, a close association with humans increases the probabili ...
A Lotka-Volterra Three
... surface through (0, 0, 0) on which solutions move toward (0, 0, 0). This stable surface intersects (0, 0, 0) tangent to the plane spanned by the two eigenvectors 0, 1, 0 and 0, 0, 1. Again, using our previous analysis, we see that the stable manifold turns out to be the yz-plane itself. Note tha ...
... surface through (0, 0, 0) on which solutions move toward (0, 0, 0). This stable surface intersects (0, 0, 0) tangent to the plane spanned by the two eigenvectors 0, 1, 0 and 0, 0, 1. Again, using our previous analysis, we see that the stable manifold turns out to be the yz-plane itself. Note tha ...
biodiversity conservation
... Definition • Totality of genes, species and ecosystems of a region. • Genetic diversity- variation of genes within species. ...
... Definition • Totality of genes, species and ecosystems of a region. • Genetic diversity- variation of genes within species. ...
Biotic Resources - City of Pasadena
... continual disruption of the urban environment such as increased nitrogen deposition, air pollution, and ornamental planting. Closer to the mountains, the habitat begins to diversify and birchleaf mountain mahogany (Cercocarpus betuloides), California sagebrush (Artemisia californica), coast live oak ...
... continual disruption of the urban environment such as increased nitrogen deposition, air pollution, and ornamental planting. Closer to the mountains, the habitat begins to diversify and birchleaf mountain mahogany (Cercocarpus betuloides), California sagebrush (Artemisia californica), coast live oak ...
Adaptations in Species
... desired traits is selective breeding. Selective breeding is similar to natural selection except that humans, instead of nature, do the selecting. By breeding organisms with desired traits, humans change traits just as natural selection does. Cows with increased levels of milk production, dogs of dif ...
... desired traits is selective breeding. Selective breeding is similar to natural selection except that humans, instead of nature, do the selecting. By breeding organisms with desired traits, humans change traits just as natural selection does. Cows with increased levels of milk production, dogs of dif ...
Sweden
... number of organisms is much greater and access to the natural environment is not restricted; which are all factors which increase the risk for establishment. Another use of biological control agents outside of greenhouses is a parasitic Hymenoptera used for controlling flies in stables and barns. Al ...
... number of organisms is much greater and access to the natural environment is not restricted; which are all factors which increase the risk for establishment. Another use of biological control agents outside of greenhouses is a parasitic Hymenoptera used for controlling flies in stables and barns. Al ...
Eighth Gr BB 1 - Marietta City Schools
... ecosystems in the world exist within narrow boundaries (sections of the Amazon rainforest, for example, and the Galapagos Islands). These ecosystems might be relatively small, but besides threat from destructive human behavior, they’re strong because of their biodiversity; each species is connected ...
... ecosystems in the world exist within narrow boundaries (sections of the Amazon rainforest, for example, and the Galapagos Islands). These ecosystems might be relatively small, but besides threat from destructive human behavior, they’re strong because of their biodiversity; each species is connected ...
Life on Rocky Shores
... do not settle on rock until they have gone though larval stages in the plankton, and that the lives of larvae are full of risks. Snails and limpets The checkered periwinkle, Littorina scutulata, and the Sitka periwinkle, L. sitkana, are common, but one may be more abundant than the other on a partic ...
... do not settle on rock until they have gone though larval stages in the plankton, and that the lives of larvae are full of risks. Snails and limpets The checkered periwinkle, Littorina scutulata, and the Sitka periwinkle, L. sitkana, are common, but one may be more abundant than the other on a partic ...
IMMATURE STAGES OF AcTINOTE zIkANI
... Brazil, Paranapiacaba, São Paulo; however, the immature stages were only very briefly described. Field studies showed that population size can strongly fluctuate from year to year, with the species being extremely common in some years and then virtually absent for several years (Francini et al. 2005 ...
... Brazil, Paranapiacaba, São Paulo; however, the immature stages were only very briefly described. Field studies showed that population size can strongly fluctuate from year to year, with the species being extremely common in some years and then virtually absent for several years (Francini et al. 2005 ...
stri science symposium - Smithsonian Tropical Research Institute
... available at STRI, with the objective of outlining how they can be used to understand the ecological and functional (physiological and genetic) basis of interactions of pathogenic and mutualistic microbes (mostly fungi) with tropical host plants. Extensive surveys of fungal and bacterial communities ...
... available at STRI, with the objective of outlining how they can be used to understand the ecological and functional (physiological and genetic) basis of interactions of pathogenic and mutualistic microbes (mostly fungi) with tropical host plants. Extensive surveys of fungal and bacterial communities ...
Changes in habitat heterogeneity alter marine sessile benthic
... on the switching among threshold communities over local to regional scales. Contrasting heterogeneity and homogeneity We first used a model that integrated Long Island Sound hydrodynamics with an individual-based model (IBM) with the ability to manipulate life history traits (Hamilton 2005). This mod ...
... on the switching among threshold communities over local to regional scales. Contrasting heterogeneity and homogeneity We first used a model that integrated Long Island Sound hydrodynamics with an individual-based model (IBM) with the ability to manipulate life history traits (Hamilton 2005). This mod ...
How do ecologists select and use indicator species
... including climatic change, habitat loss and fragmentation, pollution and contamination, disease outbreaks, and the spread of invasive species. Among many suggested strategies, one of the most popular has been to adopt monitoring techniques that can detect ecological changes both at an early stage an ...
... including climatic change, habitat loss and fragmentation, pollution and contamination, disease outbreaks, and the spread of invasive species. Among many suggested strategies, one of the most popular has been to adopt monitoring techniques that can detect ecological changes both at an early stage an ...
On the integration of biotic interaction and
... a general theory for biogeography. Finally, species are not isolated, they are embedded within complex networks of ecological interactions. While interactions define community ecology, they are less informative for biogeography (Peterson 2003). Theory predicts that interactions in small community mo ...
... a general theory for biogeography. Finally, species are not isolated, they are embedded within complex networks of ecological interactions. While interactions define community ecology, they are less informative for biogeography (Peterson 2003). Theory predicts that interactions in small community mo ...
estimating species richness three different ways
... ants. In most terrestrial ecosystems ants are a conspicuous presence, and they are among the most commonly studied terrestrial invertebrates. They are mostly scavengers and predators, and they have large impacts on soil formation, seed predation and dispersal, and invertebrate community structure (F ...
... ants. In most terrestrial ecosystems ants are a conspicuous presence, and they are among the most commonly studied terrestrial invertebrates. They are mostly scavengers and predators, and they have large impacts on soil formation, seed predation and dispersal, and invertebrate community structure (F ...
The Ethics of Reviving Long Extinct Species
... successful, does not restore these relationships. It only results in organisms whose genetic makeup most resembles that of species that went extinct long ago. For this reason, on some conceptions of species, the organisms resulting from de-extinction may not even be conspecific with the species that ...
... successful, does not restore these relationships. It only results in organisms whose genetic makeup most resembles that of species that went extinct long ago. For this reason, on some conceptions of species, the organisms resulting from de-extinction may not even be conspecific with the species that ...
Vaughn.BioScience.2010
... scales and using multiple empirical approaches can be used to gain a more complete understanding of how biodiversity losses will have an impact on ecosystem function. Species traits determine ecosystem function Ecosystem function is the product of the expression of species’ functional traits (Ackerl ...
... scales and using multiple empirical approaches can be used to gain a more complete understanding of how biodiversity losses will have an impact on ecosystem function. Species traits determine ecosystem function Ecosystem function is the product of the expression of species’ functional traits (Ackerl ...
The biology and ecology of narrow endemic and
... and Soltis 2000). In fact, differences in regional histories can strongly affect observed patterns of endemism (Cowling et al. 1994, 1996) and each study should thus be made in a single regional flora in order to minimize the effects of spatial variation in historical factors. Moreover, a large arra ...
... and Soltis 2000). In fact, differences in regional histories can strongly affect observed patterns of endemism (Cowling et al. 1994, 1996) and each study should thus be made in a single regional flora in order to minimize the effects of spatial variation in historical factors. Moreover, a large arra ...
Bifrenaria
Bifrenaria, abbreviated Bif. in horticultural trade, is a genus of plant in family Orchidaceae. It contains 20 species found in Panama, Trinidad and South America. There are no known uses for them, but their abundant, and at first glance artificial, flowers, make them favorites of orchid growers.The genus can be split in two clearly distinct groups: one of highly robust plants with large flowers, that encompass the first species to be classified under the genus Bifrenaria; other of more delicate plants with smaller flowers occasionally classified as Stenocoryne or Adipe. There are two additional species that are normally classified as Bifrenaria, but which molecular analysis indicate to belong to different orchid groups entirely. One is Bifrenaria grandis which is endemic to Bolívia and which is now placed in Lacaena, and Bifrenaria steyermarkii, an inhabitant of the northern Amazon Forest, which does not have an alternative classification.