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... habitat can lead to rapid, severe and unconfined ecosystem alteration on island environments. The Seychelles consists of a scattered group of 115 granitic and coralline islands situated in the Western Indian Ocean approximately 1600 km from East Africa and 1700 km from India (Stoddart, 1984). Like m ...
... habitat can lead to rapid, severe and unconfined ecosystem alteration on island environments. The Seychelles consists of a scattered group of 115 granitic and coralline islands situated in the Western Indian Ocean approximately 1600 km from East Africa and 1700 km from India (Stoddart, 1984). Like m ...
A hierarchical view of habitat and its relationship to species
... of the patterns described in the introduction. The assumptions are (1) that species differ in their ecological requirements and, thus, there will be some species with narrow and others with broad requirements (specialists and generalists, respectively) and (2) that any habitat may host a set of spec ...
... of the patterns described in the introduction. The assumptions are (1) that species differ in their ecological requirements and, thus, there will be some species with narrow and others with broad requirements (specialists and generalists, respectively) and (2) that any habitat may host a set of spec ...
Singlespecies metapopulation dynamics
... Let us return to the Levins model. It makes two important simplifying assumptions: (1) there is no spatial correlation in the state (occupied or not) of habitat patches (the ‘zero-correlation’ assumption), and (2) there are only two states, presence and absence (the ‘discrete-state’ assumption with ...
... Let us return to the Levins model. It makes two important simplifying assumptions: (1) there is no spatial correlation in the state (occupied or not) of habitat patches (the ‘zero-correlation’ assumption), and (2) there are only two states, presence and absence (the ‘discrete-state’ assumption with ...
2009rat
... The ratio of E. rosea shells chewed by rats over the total number of shells found in each plot is shown over time by site (next figure). If rats are, in fact, consuming high numbers of E. rosea then this should be reflected in a higher proportion of empty shells observed to be chewed rather than int ...
... The ratio of E. rosea shells chewed by rats over the total number of shells found in each plot is shown over time by site (next figure). If rats are, in fact, consuming high numbers of E. rosea then this should be reflected in a higher proportion of empty shells observed to be chewed rather than int ...
Niche saturation reveals resource partitioning among consumers
... Here, Y is the density of prey at the end of an experiment that contains density xi of consumer species i. The parameters p1, p2, p3 and p4 represent the proportion of the resource (prey) available solely to predators 1, 2, 3 and 4, respectively, p5 is the proportion available to all predators and p ...
... Here, Y is the density of prey at the end of an experiment that contains density xi of consumer species i. The parameters p1, p2, p3 and p4 represent the proportion of the resource (prey) available solely to predators 1, 2, 3 and 4, respectively, p5 is the proportion available to all predators and p ...
12 Terrestrial fauna - The Department of State Development
... wetlands, swamps and notophyll vine forest (as described in Chapter 11, Terrestrial flora). With such a diversity of habitats and a large area of remnant vegetation it can be expected that the project area would support a high diversity of terrestrial fauna, including some species of conservation si ...
... wetlands, swamps and notophyll vine forest (as described in Chapter 11, Terrestrial flora). With such a diversity of habitats and a large area of remnant vegetation it can be expected that the project area would support a high diversity of terrestrial fauna, including some species of conservation si ...
Population structure of long-lived macrozoobenthic species
... organic and inorganic matter, food (phytoplankton) and predation (Figure 3). Salinity is the major factor affecting the distribution of the species and in the margins of the distribution area affects the size of the individuals (Westerbom 2006). Climate change has been predicted to decrease salinity ...
... organic and inorganic matter, food (phytoplankton) and predation (Figure 3). Salinity is the major factor affecting the distribution of the species and in the margins of the distribution area affects the size of the individuals (Westerbom 2006). Climate change has been predicted to decrease salinity ...
Game Structures in Mutualistic Interactions: What Can
... that the nectar-provisioning rate by lycaenid butterfly larvae to tending ants (that would defend the larvae against predators) depends on variables like predation risk, and the number of ants or other larvae present: decreasing predation risk and increasing number of ants reduces the larvae’s deman ...
... that the nectar-provisioning rate by lycaenid butterfly larvae to tending ants (that would defend the larvae against predators) depends on variables like predation risk, and the number of ants or other larvae present: decreasing predation risk and increasing number of ants reduces the larvae’s deman ...
Butterflies and their contribution in ecosystem: A review
... flower and reproduce sexually even over large areas. Nectar produced from flower contains nutritious vitamins, lipids, sugar, amino acid etc. which is important food source for pollinators. Butterflies are also pollinators and visit the flower to eat nectar; tiny scales on the butterfly bodies brush ...
... flower and reproduce sexually even over large areas. Nectar produced from flower contains nutritious vitamins, lipids, sugar, amino acid etc. which is important food source for pollinators. Butterflies are also pollinators and visit the flower to eat nectar; tiny scales on the butterfly bodies brush ...
Appendix F: Invertebrates
... Hydroids (Hydrozoans), anemones, sea pens, sea whips, and corals (Anthozoans) and jellyfish (Schyphozoans) are animals that all have a consistent and simple body structure and are taxonomically classified together under the Phylum Cnidaria (Ruppert and Barnes 1994). Cnidarians may be either sessile ...
... Hydroids (Hydrozoans), anemones, sea pens, sea whips, and corals (Anthozoans) and jellyfish (Schyphozoans) are animals that all have a consistent and simple body structure and are taxonomically classified together under the Phylum Cnidaria (Ruppert and Barnes 1994). Cnidarians may be either sessile ...
How will biotic interactions influence climate change–induced range
... may also include smaller scale gradients generated by depth,2,14 microtopography, or urbanization.45 Second, quantifying multiple climatic variables across this environmental gradient is important because climate change will influence more than just mean temperature (e.g., precipitation, snowmelt, e ...
... may also include smaller scale gradients generated by depth,2,14 microtopography, or urbanization.45 Second, quantifying multiple climatic variables across this environmental gradient is important because climate change will influence more than just mean temperature (e.g., precipitation, snowmelt, e ...
alteration of ecosystem nitrogen dynamics by exotic plants: a case
... rate, or tissue quality, would be expected to overlap with native species in their effects on resources, and thus interact with residents in a competitive manner that would likely result in similar effects on ecosystem processes. We suggest that these species can still cause ecosystem change, but th ...
... rate, or tissue quality, would be expected to overlap with native species in their effects on resources, and thus interact with residents in a competitive manner that would likely result in similar effects on ecosystem processes. We suggest that these species can still cause ecosystem change, but th ...
"Biotic Homogenization". - University of Washington
... Biotic homogenization may also be accompanied by significant evolutionary consequences. Much like how the future of speciation is tightly linked with the future of species diversity, biotic homogenization may compromise the potential for future speciation because of limited spatial variability in spe ...
... Biotic homogenization may also be accompanied by significant evolutionary consequences. Much like how the future of speciation is tightly linked with the future of species diversity, biotic homogenization may compromise the potential for future speciation because of limited spatial variability in spe ...
The Extinction of the Glaucus Macaw
... were known to occur there are only four palm species that occurred in the types of groves used by Andorhynchus macaws. Of these four only one, the "Chatay" (Butia yatay) with its 15-16 mm fruits has the correct characteristics to support the Glaucus. Does this palm hold the key to the extinction of ...
... were known to occur there are only four palm species that occurred in the types of groves used by Andorhynchus macaws. Of these four only one, the "Chatay" (Butia yatay) with its 15-16 mm fruits has the correct characteristics to support the Glaucus. Does this palm hold the key to the extinction of ...
Dynamics of Blowfly Populations
... dynamic behaviour. However, this dimension is not completely suitable to project trends in terms of local extinction, except in cases involving deterministic chaos. Two approaches have been exploited to assess the uncertainty, by using the model proposed by Prout and McChesney (1985). The first appr ...
... dynamic behaviour. However, this dimension is not completely suitable to project trends in terms of local extinction, except in cases involving deterministic chaos. Two approaches have been exploited to assess the uncertainty, by using the model proposed by Prout and McChesney (1985). The first appr ...
Influence of Mammalian Herbivory on Woody Plants Dynamics and
... Plant functional traits - can be defined as morphological or physiological characters that influence species responses to different environmental conditions Functional diversity - Is the value and range of functional traits of the organisms present in a given ecosystem that influence the ecosystem f ...
... Plant functional traits - can be defined as morphological or physiological characters that influence species responses to different environmental conditions Functional diversity - Is the value and range of functional traits of the organisms present in a given ecosystem that influence the ecosystem f ...
Biotic and abiotic factors constraining the distribution and
... more sensitive to soil salinity and high light conditions than other, more common mangroves but its salinity tolerance does not explain its narrow distribution. Obstacles to recruitment for P. rhizophorae were examined by quantifying propagule predation by crabs and seedling survival in different fo ...
... more sensitive to soil salinity and high light conditions than other, more common mangroves but its salinity tolerance does not explain its narrow distribution. Obstacles to recruitment for P. rhizophorae were examined by quantifying propagule predation by crabs and seedling survival in different fo ...
P for Two, Sharing a Scarce Resource: Soil
... These species can exude massive amounts of malonate, malate, and citrate, which are some of the most efficient P-mobilizing carboxylates (Hinsinger, 2001). Thus, it is generally expected that legumes facilitate P acquisition of the intercropped cereal, although many legume species do not exude carbo ...
... These species can exude massive amounts of malonate, malate, and citrate, which are some of the most efficient P-mobilizing carboxylates (Hinsinger, 2001). Thus, it is generally expected that legumes facilitate P acquisition of the intercropped cereal, although many legume species do not exude carbo ...
Open Lands in a New England Town, Lincoln, MA: History, Ecology
... Homo sapiens have been intentionally and unintentionally caused the transformation of landscapes to various degrees. Humans arrived in North America as the ice sheet retreated, and gradually aggregated influences on the land. Native Americans used fire for facilitating agriculture, horticulture, and ...
... Homo sapiens have been intentionally and unintentionally caused the transformation of landscapes to various degrees. Humans arrived in North America as the ice sheet retreated, and gradually aggregated influences on the land. Native Americans used fire for facilitating agriculture, horticulture, and ...
Estimating competition coefоcients: strong competition among three
... container. Containers of pulp were frozen at )4°C for up to a week before use, to kill any remaining larvae. The emptied woody shells were also stored in a freezer until use. Before use, the pulp and shells were defrosted and moistened. Each replicate was started with 3.6 ml of pulp in a shell. This ...
... container. Containers of pulp were frozen at )4°C for up to a week before use, to kill any remaining larvae. The emptied woody shells were also stored in a freezer until use. Before use, the pulp and shells were defrosted and moistened. Each replicate was started with 3.6 ml of pulp in a shell. This ...
Evidence for interspecific interactions in the ectoparasite infracommunity of a wild mammal
... species in the wild [36–39]. However, the skin absorption, efficacy and permanency of Fipronil may vary between different species and since such measures were not available for the study species we cannot entirely exclude the possibility that these properties may have slightly deviated for sengis fr ...
... species in the wild [36–39]. However, the skin absorption, efficacy and permanency of Fipronil may vary between different species and since such measures were not available for the study species we cannot entirely exclude the possibility that these properties may have slightly deviated for sengis fr ...
Species at Risk Database Management System
... Reason for Designation This population gives birth on the open arctic tundra, and most herds winter in vast subarctic forests. Well-known for its large aggregations, lengthy migrations, and significant cultural and social value to northern Aboriginal Peoples and other Canadians, its 14-15 subpopulat ...
... Reason for Designation This population gives birth on the open arctic tundra, and most herds winter in vast subarctic forests. Well-known for its large aggregations, lengthy migrations, and significant cultural and social value to northern Aboriginal Peoples and other Canadians, its 14-15 subpopulat ...
Other Contributions - Mesoamerican Herpetology
... Oscaecilia osae. Predation and Habitat. Caecilians generally are difficult to find and their biology remains largely unknown. Most species are fossorial, and often live in moist soils adjacent to streams, lakes, and swamps (Zug. et al., 2001). The distribution of the genus Oscaecilia extends from so ...
... Oscaecilia osae. Predation and Habitat. Caecilians generally are difficult to find and their biology remains largely unknown. Most species are fossorial, and often live in moist soils adjacent to streams, lakes, and swamps (Zug. et al., 2001). The distribution of the genus Oscaecilia extends from so ...
Biodiversity Significance of North East India
... Myanmar, Thailand and on to Indochina, then south to Isthmus of Kra in the Malaysian peninsula. (Myers 2000). The hotspot is, the second largest and next only to the Mediterranean basin with an area 2,20,60,000 sq km among the 25 identified globally. All the global hotspots are based on two criteria ...
... Myanmar, Thailand and on to Indochina, then south to Isthmus of Kra in the Malaysian peninsula. (Myers 2000). The hotspot is, the second largest and next only to the Mediterranean basin with an area 2,20,60,000 sq km among the 25 identified globally. All the global hotspots are based on two criteria ...
local vs. regional influences on local diversity in
... The number of fish species occurring in stream communities is related to numerous local factors, many of which are correlated with each other or regional factors. For example, extreme water temperatures (high or low) often limit fish diversity, and spatially complex habitats typically support more s ...
... The number of fish species occurring in stream communities is related to numerous local factors, many of which are correlated with each other or regional factors. For example, extreme water temperatures (high or low) often limit fish diversity, and spatially complex habitats typically support more s ...
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.