(Anura, Rhacophoridae) with an Updated Anuran Species List for
... local colonization and may not indicate that this species was previously absent from the forest at Danum Valley Field Center, but rather that it did not occupy the previously sampled sections of the study streams. The same pattern of colonization has been observed by others conducting repeated sampl ...
... local colonization and may not indicate that this species was previously absent from the forest at Danum Valley Field Center, but rather that it did not occupy the previously sampled sections of the study streams. The same pattern of colonization has been observed by others conducting repeated sampl ...
Gerbils and Heteromyids – Interspecific Competition and the Spatio
... We have other indirect evidence that competition for food resources may play a major role in the temporal-partitioning pattern. We conducted our experiment in October after a hot summer when resources should have been limited. However, a study conducted a few months later in late winter, when resour ...
... We have other indirect evidence that competition for food resources may play a major role in the temporal-partitioning pattern. We conducted our experiment in October after a hot summer when resources should have been limited. However, a study conducted a few months later in late winter, when resour ...
Relative levels of food aggression displayed by Common
... Some studies (e.g. Rotenberry 1980) have shown that species that display aggressive competition are not necessarily the most successful ones. Rather, species that use resources opportunistically and discreetly may have greater success. An invasive species that is lacking experience of its competitor ...
... Some studies (e.g. Rotenberry 1980) have shown that species that display aggressive competition are not necessarily the most successful ones. Rather, species that use resources opportunistically and discreetly may have greater success. An invasive species that is lacking experience of its competitor ...
section 7 - hartnell.edu
... The predominant autotrophs of the biosphere are the photosynthesizers, a group that includes the familiar green plants of terrestrial ecosystems. These autotrophs use the captured solar energy to synthesize organic materials that serve as a source of energy for the other major group—the heterotrophs ...
... The predominant autotrophs of the biosphere are the photosynthesizers, a group that includes the familiar green plants of terrestrial ecosystems. These autotrophs use the captured solar energy to synthesize organic materials that serve as a source of energy for the other major group—the heterotrophs ...
Traveling wave solutions of a reaction diffusion model for competing
... This assumption is equivalent to the transformations y1 ! y1/c12 and y2 ! y2/c21 (in the case c1250, c2150) and therefore only represents a re-scaling of yi which can be absorbed into the definitions of f and g. This rescaling of the interaction matrix C is commonly used in the pioneer-climax models ...
... This assumption is equivalent to the transformations y1 ! y1/c12 and y2 ! y2/c21 (in the case c1250, c2150) and therefore only represents a re-scaling of yi which can be absorbed into the definitions of f and g. This rescaling of the interaction matrix C is commonly used in the pioneer-climax models ...
Assessing the health of European rivers using
... category would be omitted. However, given the limited trophic data for some species, the benthivore category is often retained in classification schemes. The same problems hold true for other categories. Difficulties in classification also arise with fish species that change their trophic status over th ...
... category would be omitted. However, given the limited trophic data for some species, the benthivore category is often retained in classification schemes. The same problems hold true for other categories. Difficulties in classification also arise with fish species that change their trophic status over th ...
Environmental correlates of acorn production by four species of Minnesota oaks
... of the genus (section Quercus) and mature acorns in a single season (‘1-year’ species), while pin and red oaks are members of the red oak section (section Lobatae) and require 2 years to mature acorns (‘2-year’ species). All are wind pollinated. Quercus ellipsoidalis and Q. rubra hybridize but are g ...
... of the genus (section Quercus) and mature acorns in a single season (‘1-year’ species), while pin and red oaks are members of the red oak section (section Lobatae) and require 2 years to mature acorns (‘2-year’ species). All are wind pollinated. Quercus ellipsoidalis and Q. rubra hybridize but are g ...
Spotted-tailed quolls - WWF
... mortality in some areas, due to scavenging of road-killed carcasses, as well as the potential impacts of climate change. ...
... mortality in some areas, due to scavenging of road-killed carcasses, as well as the potential impacts of climate change. ...
Young Forest Habitat - Department of Plant Science
... make improvements is the plant community. This is true whether we are creating habitat for threatened or endangered butterflies that seek particular flowers for nectar, or a migratory songbird that is going to feed primarily on insects. The plants in an ecosystem are the base of the food web – they ...
... make improvements is the plant community. This is true whether we are creating habitat for threatened or endangered butterflies that seek particular flowers for nectar, or a migratory songbird that is going to feed primarily on insects. The plants in an ecosystem are the base of the food web – they ...
Mutualism or cooperation among competitors promotes coexistence
... Resources-related niche differentiation alone is hard to explain the coexistence of species, which obviously exploit very similar resources. For example, all plants living together use light, CO2 , nitrogen and water. The phytoplankton species in water also use very similar resources. The competitio ...
... Resources-related niche differentiation alone is hard to explain the coexistence of species, which obviously exploit very similar resources. For example, all plants living together use light, CO2 , nitrogen and water. The phytoplankton species in water also use very similar resources. The competitio ...
Larsen et al (2005) Ecol Letters pdf
... pristine) community. Each island was used as an independent community in the analysis. Mark-recapture experiments confirmed that movements of individuals between islands were extremely low (T.H. Larsen, unpublished data). Species collected at only one site were omitted from the analysis because it i ...
... pristine) community. Each island was used as an independent community in the analysis. Mark-recapture experiments confirmed that movements of individuals between islands were extremely low (T.H. Larsen, unpublished data). Species collected at only one site were omitted from the analysis because it i ...
Are invasive plant species better competitors than native plant
... alien or native species or both in which the competition treatments were compared to an appropriate control performed simultaneously and in the same place. We excluded from our analysis purely observational studies (i.e. spacing, correlation or neighbourhood analysis, changes through time and compar ...
... alien or native species or both in which the competition treatments were compared to an appropriate control performed simultaneously and in the same place. We excluded from our analysis purely observational studies (i.e. spacing, correlation or neighbourhood analysis, changes through time and compar ...
Plant diversity in tropical forests: a review of mechanisms of species
... seed-to-seedling transition for 53 species from BCI. They used 200 census stations to fit recruit (R) and seed (S) density to the following function: R=c×Sb, where c and b are fitted constants. Negative density dependence (b<1) was evident for every species, and the median bvalue was just 0.23. Thes ...
... seed-to-seedling transition for 53 species from BCI. They used 200 census stations to fit recruit (R) and seed (S) density to the following function: R=c×Sb, where c and b are fitted constants. Negative density dependence (b<1) was evident for every species, and the median bvalue was just 0.23. Thes ...
Feeding behaviour of the bat Phyllostomus hastatus (Pallas 1767) in
... feeding on relatively hard fruits. In contrast, understory fruit bats, such as Carollia perspicillata (Linnaeus, 1758), must be restricted to soft fruits (DUMONT, 1999). Hardness and size of fruits limit the use by Phyllostomid bats to small and medium size fruits. No observations of feeding behavio ...
... feeding on relatively hard fruits. In contrast, understory fruit bats, such as Carollia perspicillata (Linnaeus, 1758), must be restricted to soft fruits (DUMONT, 1999). Hardness and size of fruits limit the use by Phyllostomid bats to small and medium size fruits. No observations of feeding behavio ...
Lugo et al. 2012 - Penn State University
... novel montane and karst forests and shaded coffee plantations, Carlo (1999) found that only 2.6% of all avian foraging records (insectivory and frugivory) occurred on introduced plants belonging to seven species, six of which were fleshy-fruited species with zoochorous seeds. Overall, 58.2% of all h ...
... novel montane and karst forests and shaded coffee plantations, Carlo (1999) found that only 2.6% of all avian foraging records (insectivory and frugivory) occurred on introduced plants belonging to seven species, six of which were fleshy-fruited species with zoochorous seeds. Overall, 58.2% of all h ...
Causes and Consequences of Thermal Tolerance Limits in Rocky
... experience larger daily and seasonal fluctuations in microhabitat conditions, due to their greater exposure to terrestrial conditions during emersion. Comparative analyses of the adaptive linkage between physiological tolerance limits and vertical distribution are the most powerful when the study sp ...
... experience larger daily and seasonal fluctuations in microhabitat conditions, due to their greater exposure to terrestrial conditions during emersion. Comparative analyses of the adaptive linkage between physiological tolerance limits and vertical distribution are the most powerful when the study sp ...
The Endangered Species Act of 1973
... policy, "28 to improve plans and programs towards achieving the goal of environmental excellence. The compromising language of this provision requires merely that environmental protection be one of a totality of concerns to be taken into consideration. Thus, before an environmental safeguard is requ ...
... policy, "28 to improve plans and programs towards achieving the goal of environmental excellence. The compromising language of this provision requires merely that environmental protection be one of a totality of concerns to be taken into consideration. Thus, before an environmental safeguard is requ ...
Invasive Species of Lakes Erie and Ontario
... spiny waterflea, also known as "B.C.", has had a big impact on the Lake Erie ecosystem. These tiny invertebrates are not insects, but small, predatory crustaceans with a long, barbed tail spine that protects them from predators while they compete with fishes, like young yellow perch, for zooplankton ...
... spiny waterflea, also known as "B.C.", has had a big impact on the Lake Erie ecosystem. These tiny invertebrates are not insects, but small, predatory crustaceans with a long, barbed tail spine that protects them from predators while they compete with fishes, like young yellow perch, for zooplankton ...
native plants and adapted seeds for reclamation
... species grow in a variety of climate conditions and are in contact with diverse soil types and plant and animal communities throughout their range. Over time, those populations adapt to the growing season in their local environment including temperatures and rainfall, and are compatible with local s ...
... species grow in a variety of climate conditions and are in contact with diverse soil types and plant and animal communities throughout their range. Over time, those populations adapt to the growing season in their local environment including temperatures and rainfall, and are compatible with local s ...
Extinction order and altered community structure
... pristine) community. Each island was used as an independent community in the analysis. Mark-recapture experiments confirmed that movements of individuals between islands were extremely low (T.H. Larsen, unpublished data). Species collected at only one site were omitted from the analysis because it i ...
... pristine) community. Each island was used as an independent community in the analysis. Mark-recapture experiments confirmed that movements of individuals between islands were extremely low (T.H. Larsen, unpublished data). Species collected at only one site were omitted from the analysis because it i ...
Leaf-level nitrogen-use efficiency of canopy and understorey
... Hikosaka & Hirose (2001) showed that light influenced N use, their scope was confined to conspecific individuals in a monospecific stand. In most natural environments, stands are composed of many species that coexist and whose canopies form several strata. The uppermost layer is occupied by canopy s ...
... Hikosaka & Hirose (2001) showed that light influenced N use, their scope was confined to conspecific individuals in a monospecific stand. In most natural environments, stands are composed of many species that coexist and whose canopies form several strata. The uppermost layer is occupied by canopy s ...
Alberta Whitebark and Limber Pine Recovery Planning
... Robin Gutsell, Fish and Wildlife Division, Alberta Environment and Sustainable Resource Development (co-chair) Brad Jones, Forestry Division, Alberta Environment and Sustainable Resource Development (co-chair) Leonard Barnhardt, Forestry Division, Alberta Environment and Sustainable Resource Develo ...
... Robin Gutsell, Fish and Wildlife Division, Alberta Environment and Sustainable Resource Development (co-chair) Brad Jones, Forestry Division, Alberta Environment and Sustainable Resource Development (co-chair) Leonard Barnhardt, Forestry Division, Alberta Environment and Sustainable Resource Develo ...
1 Theories
... (1970) had similar ideas, writing that “the ecosystem … is … the basic selectional unit of evolution. ...
... (1970) had similar ideas, writing that “the ecosystem … is … the basic selectional unit of evolution. ...
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.