![Eleutherodactylus Frog Introductions to Hawaii](http://s1.studyres.com/store/data/014787698_1-06e6c7efa6af864ee8a6942fae5faf60-300x300.png)
Eleutherodactylus Frog Introductions to Hawaii
... Campbell 1996; McKeown 1998), but either vouchered specimens were not provided and identification was unconfirmed (R. Campbell 1996) or claims as to identity and distribution included inaccuracies because they were based on erroneous assumptions and second-hand information from newspaper articles (M ...
... Campbell 1996; McKeown 1998), but either vouchered specimens were not provided and identification was unconfirmed (R. Campbell 1996) or claims as to identity and distribution included inaccuracies because they were based on erroneous assumptions and second-hand information from newspaper articles (M ...
Quantifying and testing coexistence mechanisms arising from
... density would have greater covariance between environment and competition, and thus weaker recruitment fluctuations than a species at low density. According to the theory of the storage effect (Chesson, 2000b), in the presence of a long-lived life-history stage that buffers variation, this difference ...
... density would have greater covariance between environment and competition, and thus weaker recruitment fluctuations than a species at low density. According to the theory of the storage effect (Chesson, 2000b), in the presence of a long-lived life-history stage that buffers variation, this difference ...
Metaâ•`analysis of the effects of small mammal
... interactions. Some species have large enough impacts through their disturbances to be classed as ecosystem engineers and/or keystone species. Others have negative or null effects. However, at present it is difficult to predict whether the disturbances created by a given species will have significant ...
... interactions. Some species have large enough impacts through their disturbances to be classed as ecosystem engineers and/or keystone species. Others have negative or null effects. However, at present it is difficult to predict whether the disturbances created by a given species will have significant ...
Power Point Presentation - Hale AP Biology
... • Pathogens can have dramatic effects on communities • For example, coral reef communities are being decimated by white-band disease Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
... • Pathogens can have dramatic effects on communities • For example, coral reef communities are being decimated by white-band disease Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
European Code of Conduct on Zoological Gardens and
... most important direct drivers of biodiversity loss and ecosystem service changes. IAS are widely recognised as a major threat to biodiversity on a global scale - together with overexploitation, pollution, habitat destruction and climate change - and the greatest threat to fragile ecosystems such as ...
... most important direct drivers of biodiversity loss and ecosystem service changes. IAS are widely recognised as a major threat to biodiversity on a global scale - together with overexploitation, pollution, habitat destruction and climate change - and the greatest threat to fragile ecosystems such as ...
An in situ study of predator aggregations on scallop (Pecten
... observations made along a fished track (e.g., Medcof and Bourne, 1964; Caddy, 1973; Chapman et al., 1977; Murawski and Serchuk, 1989; Kaiser and Spencer, 1994b). These have all noted increased densities of several fish and invertebrate scavenging species in response to fishing activities, but detail ...
... observations made along a fished track (e.g., Medcof and Bourne, 1964; Caddy, 1973; Chapman et al., 1977; Murawski and Serchuk, 1989; Kaiser and Spencer, 1994b). These have all noted increased densities of several fish and invertebrate scavenging species in response to fishing activities, but detail ...
the economics of biodiversity
... Human population more than doubled between 1950 and 2000, growing from approximately 2.5 billion in 1950 to just over 6 billion in 2000 (U.S. Bureau of Census). Human health, nutrition and average life expectancy improved dramatically [Johnson (2000)]. The value of economic activity increased by ove ...
... Human population more than doubled between 1950 and 2000, growing from approximately 2.5 billion in 1950 to just over 6 billion in 2000 (U.S. Bureau of Census). Human health, nutrition and average life expectancy improved dramatically [Johnson (2000)]. The value of economic activity increased by ove ...
Current Normative Concepts in Conservation
... ecology”—an even more recently emerged transdiscipline (Rapport 1992)—a plethora of ill-defined normative concepts are now in circulation in the conservation community. The most salient are biological diversity, biological integrity, ecological restoration, ecological services, ecological rehabilita ...
... ecology”—an even more recently emerged transdiscipline (Rapport 1992)—a plethora of ill-defined normative concepts are now in circulation in the conservation community. The most salient are biological diversity, biological integrity, ecological restoration, ecological services, ecological rehabilita ...
Trade-offs in community ecology: linking spatial scales and species
... during favourable time periods. Persistence during unfavourable time periods requires the organism to have some life-stage that can withstand the unfavourable conditions. For example, many organisms have resting eggs or dormant seeds, and others have long-lived adults that can persist during times o ...
... during favourable time periods. Persistence during unfavourable time periods requires the organism to have some life-stage that can withstand the unfavourable conditions. For example, many organisms have resting eggs or dormant seeds, and others have long-lived adults that can persist during times o ...
Life history, population dynamics, standing biomass and
... Palavras-chave: produção secundária, crescimento, reprodução, variação sazonal, cladócero tropical. ...
... Palavras-chave: produção secundária, crescimento, reprodução, variação sazonal, cladócero tropical. ...
Facilitative or competitive effects of woody plants on understorey
... Canopy’ N-fixing species facilitate understorey vegetation (Fig. 1b,c). A low canopy of trees (i.e. a canopy that touches the soil surface) almost always reduced understorey growth, regardless of rainfall. The only exception was the leguminous shrub Retama sphaerocarpa (see Fig. S1), suggesting that ...
... Canopy’ N-fixing species facilitate understorey vegetation (Fig. 1b,c). A low canopy of trees (i.e. a canopy that touches the soil surface) almost always reduced understorey growth, regardless of rainfall. The only exception was the leguminous shrub Retama sphaerocarpa (see Fig. S1), suggesting that ...
Understanding the implications of climate change for woodland
... The backbone of this study was based on results from bioclimatic envelope modelling (BEM). Most of the species modelling used in this study was based on an artificial neural network (ANN), but a number of species with ‘presence‐only’ data were processed using Ecological Niche Factorizatio ...
... The backbone of this study was based on results from bioclimatic envelope modelling (BEM). Most of the species modelling used in this study was based on an artificial neural network (ANN), but a number of species with ‘presence‐only’ data were processed using Ecological Niche Factorizatio ...
Placing biodiversity and ecosystem functioning in context
... pivotal component of energy flow in stream ecosystems that is often altered by anthropogenic activities (Gessner and Chauvet 2002; McKie et al. 2008). A variety of responses have been observed to different stressors. For example, decomposition is usually depressed in acidified streams (Dangles et al ...
... pivotal component of energy flow in stream ecosystems that is often altered by anthropogenic activities (Gessner and Chauvet 2002; McKie et al. 2008). A variety of responses have been observed to different stressors. For example, decomposition is usually depressed in acidified streams (Dangles et al ...
The long-term relationship between plant diversity and total plant
... J. W. Fox, NERC Centre for Population Biology, Imperial College, Silwood Park, Ascot, Berkshire, UK SL5 7PY ( [email protected]). ...
... J. W. Fox, NERC Centre for Population Biology, Imperial College, Silwood Park, Ascot, Berkshire, UK SL5 7PY ( [email protected]). ...
The long-term relationship between plant diversity and total plant
... J. W. Fox, NERC Centre for Population Biology, Imperial College, Silwood Park, Ascot, Berkshire, UK SL5 7PY ( [email protected]). ...
... J. W. Fox, NERC Centre for Population Biology, Imperial College, Silwood Park, Ascot, Berkshire, UK SL5 7PY ( [email protected]). ...
File - Mr. Greening`s Science
... increased. B) The dodo bird population increased after the birds learned to build their nests in trees. C) Human exploitation and introduced species significantly reduced dodo bird populations. D) The dodo bird population became smaller because they preyed upon the introduced species. 20. Rabbits ar ...
... increased. B) The dodo bird population increased after the birds learned to build their nests in trees. C) Human exploitation and introduced species significantly reduced dodo bird populations. D) The dodo bird population became smaller because they preyed upon the introduced species. 20. Rabbits ar ...
(Repco Rally Australia) In The Norther
... predation by cats and foxes; road kills; grazing and trampling of habitat by livestock; invasion of suitable habitat by weeds, such as Lantana, Crofton Weed and Mistflower in northern NSW. With such a small population occurring in northern NSW/southern Qld, it is essential to prevent any sig ...
... predation by cats and foxes; road kills; grazing and trampling of habitat by livestock; invasion of suitable habitat by weeds, such as Lantana, Crofton Weed and Mistflower in northern NSW. With such a small population occurring in northern NSW/southern Qld, it is essential to prevent any sig ...
Predator - Cary Institute of Ecosystem Studies
... This emphasis on the responses of prey neglects the reciprocal responses of predators, which may be equally important. In particular, we argue that invasion and evolutionary ecologists should pay more attention to the responses of native predators to exotic prey. Native predators may be an important ...
... This emphasis on the responses of prey neglects the reciprocal responses of predators, which may be equally important. In particular, we argue that invasion and evolutionary ecologists should pay more attention to the responses of native predators to exotic prey. Native predators may be an important ...
Sheep Effects on Soil, Vegetation and Habitat Conditions
... and at least two guard dogs were with the sheep full time until the sheep were removed from these lands on October 6th. Death loss, primarily from coyote predation between mid-June and mid-July, reduced the number of sheep by about 35 during the season. In August approximately 200 lambs were separat ...
... and at least two guard dogs were with the sheep full time until the sheep were removed from these lands on October 6th. Death loss, primarily from coyote predation between mid-June and mid-July, reduced the number of sheep by about 35 during the season. In August approximately 200 lambs were separat ...
Unveiling a mechanism for species decline in fragmented habitats
... those studied in the context of tropical forests [15]—may be responsible for the above-mentioned decline. Among them, we can cite: (i) species that are overly sensitive to habitat size; (ii) a lower genetic variability associated with a smaller number of individuals living in fragments (thus decreas ...
... those studied in the context of tropical forests [15]—may be responsible for the above-mentioned decline. Among them, we can cite: (i) species that are overly sensitive to habitat size; (ii) a lower genetic variability associated with a smaller number of individuals living in fragments (thus decreas ...
Separating the influence of resource `availability` from resource
... of PDR are known to differ among groups of organisms and between scales of observation; yet, we currently have no mechanism to explain how or why PDR might qualitatively shift at different scales or levels of biological organization. Two recent reviews have argued that for most natural gradients, di ...
... of PDR are known to differ among groups of organisms and between scales of observation; yet, we currently have no mechanism to explain how or why PDR might qualitatively shift at different scales or levels of biological organization. Two recent reviews have argued that for most natural gradients, di ...
Armadillos
... by now, possibly in Alabama or Mississippi. Although normally associated with moist, tropical habitats, armadillos can be found almost anywhere in the New World. For example, the pichi is found in the Patagonian region of Argentina all the way south to the Straits of Magellan; the hairy long-nosed a ...
... by now, possibly in Alabama or Mississippi. Although normally associated with moist, tropical habitats, armadillos can be found almost anywhere in the New World. For example, the pichi is found in the Patagonian region of Argentina all the way south to the Straits of Magellan; the hairy long-nosed a ...
10/4/06 version
... What rules are we searching for, and how? ............................................................................... 3 ...
... What rules are we searching for, and how? ............................................................................... 3 ...
Similarity and difference in vegetation structure of three desert shrub
... Background: Community structure and species composition are closely related to plant diversity and ecosystem stability. To explore the similarity in vegetation structure of shrub communities under the same temperate climate but with different microhabitats, 36, 28 and 13 sampling plots in Ephedra di ...
... Background: Community structure and species composition are closely related to plant diversity and ecosystem stability. To explore the similarity in vegetation structure of shrub communities under the same temperate climate but with different microhabitats, 36, 28 and 13 sampling plots in Ephedra di ...
Potential Predator-prey Relationships between Bythotrephes
... and Cap 1986, Lehman 1987, Cullis and Johnson 1988). Bythotrephes longimanus is an effective predator and includes both large-bodied and smallbodied prey items in its diet (Schulz and Yurista 1999). Thus, predation by B. longimanus has been implicated in altering the zooplankton assemblage in Lake M ...
... and Cap 1986, Lehman 1987, Cullis and Johnson 1988). Bythotrephes longimanus is an effective predator and includes both large-bodied and smallbodied prey items in its diet (Schulz and Yurista 1999). Thus, predation by B. longimanus has been implicated in altering the zooplankton assemblage in Lake M ...
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.