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Understanding the Invasion Ecology of Exotic Crayfish in California
... Some non-native crayfish were probably introduced by anglers, who use the crustaceans as bait. Some blame likely also rests with crayfish aquaculture. That is, scientists believe that some non-native crayfish now thriving in the state’s streams are descendents of escapees of aquaculture. ...
... Some non-native crayfish were probably introduced by anglers, who use the crustaceans as bait. Some blame likely also rests with crayfish aquaculture. That is, scientists believe that some non-native crayfish now thriving in the state’s streams are descendents of escapees of aquaculture. ...
Full Text - Digital Access to Scholarship at Harvard
... modeled the rate of species turnover between mainland communities, with respect to geographic distance and environmental dissimilarity, and then used the mainland model to predict turnover among islands. Turnover among island communities was significantly higher than predicted from the mainland mode ...
... modeled the rate of species turnover between mainland communities, with respect to geographic distance and environmental dissimilarity, and then used the mainland model to predict turnover among islands. Turnover among island communities was significantly higher than predicted from the mainland mode ...
Patch Disturbance and the Human Niche by John M - Zoe-s-wiki
... species enter the community. Others are extirpated (ie-become locally extinct). Species which dominated a landscape at one time become minor components of the community while other species are "fruitful and multiply", becoming dominant species. This change is in some way directional and generally pr ...
... species enter the community. Others are extirpated (ie-become locally extinct). Species which dominated a landscape at one time become minor components of the community while other species are "fruitful and multiply", becoming dominant species. This change is in some way directional and generally pr ...
Item 38C Bobcat Trapping Ban Implications - CAL
... Pacific fisher (Martes pennant)), as threatened or endangered under the California Endangered Species Act ...
... Pacific fisher (Martes pennant)), as threatened or endangered under the California Endangered Species Act ...
0213187 COVER SHEET FOR PROPOSAL TO THE NATIONAL SCIENCE FOUNDATION PD 98-1128 01/10/02
... The search for patterns of community assembly has occupied the last 25 years in community ecology and remains controversial today. A commonly sought assembly rule is that species coexistence in communities will be enhanced by differences in traits related to competition for limiting resources (i.e., ...
... The search for patterns of community assembly has occupied the last 25 years in community ecology and remains controversial today. A commonly sought assembly rule is that species coexistence in communities will be enhanced by differences in traits related to competition for limiting resources (i.e., ...
Saving the World`s Terrestrial Megafauna
... 8. S trive for increased awareness among the global public of the current megafauna crisis using traditional media as well as social media and other networking approaches. 9. S eek a new and comprehensive global commitment and framework for conserving megafauna. The international community shoul ...
... 8. S trive for increased awareness among the global public of the current megafauna crisis using traditional media as well as social media and other networking approaches. 9. S eek a new and comprehensive global commitment and framework for conserving megafauna. The international community shoul ...
Translocation strategies for multiple species depend on interspecific
... shows a much higher seed set when R. gigas is present (Steiner and Whitehead 1996). In consumer–resource interactions, the absence of suitable or sufficient resource individuals can jeopardize the successful translocation of the consumer, and managers may therefore need to translocate individuals fr ...
... shows a much higher seed set when R. gigas is present (Steiner and Whitehead 1996). In consumer–resource interactions, the absence of suitable or sufficient resource individuals can jeopardize the successful translocation of the consumer, and managers may therefore need to translocate individuals fr ...
America`s Least Wanted: Alien Species
... from foreign armies, political terrorists, or extraterrestrials. Instead, the stealthy invaders are alien species. Also known as exotic, non-native, introduced, or non-indigenous species, these are plants and animals that have been introduced—either intentionally or by accident—into areas outside th ...
... from foreign armies, political terrorists, or extraterrestrials. Instead, the stealthy invaders are alien species. Also known as exotic, non-native, introduced, or non-indigenous species, these are plants and animals that have been introduced—either intentionally or by accident—into areas outside th ...
Fact Sheet: Riparian Buffers in Parks
... of disruptions to natural ecosystem processes and can result in successional changes and species loss (Stacey et al. 2006). Dominant species exert the most influence, and thus the greatest functional changes will occur if the abundance of these species is altered (Richardson et al. 2007). The unde ...
... of disruptions to natural ecosystem processes and can result in successional changes and species loss (Stacey et al. 2006). Dominant species exert the most influence, and thus the greatest functional changes will occur if the abundance of these species is altered (Richardson et al. 2007). The unde ...
Final Report - Rufford Small Grants
... grant giving. We understand that projects often do not follow the predicted course but knowledge of your experiences is valuable to us and others who may be undertaking similar work. Please be as honest as you can in answering the questions – remember that negative experiences are just as valuable a ...
... grant giving. We understand that projects often do not follow the predicted course but knowledge of your experiences is valuable to us and others who may be undertaking similar work. Please be as honest as you can in answering the questions – remember that negative experiences are just as valuable a ...
The global diversity of protozoa and other small species
... increase in the number of new species. Consider again the extreme example of Spathidium. The genus has not been revised in the last 60years. It currently contains more than 100 species, and many are very similar to one another. How can it be justified to squeeze more “new” ciliates into such a genus ...
... increase in the number of new species. Consider again the extreme example of Spathidium. The genus has not been revised in the last 60years. It currently contains more than 100 species, and many are very similar to one another. How can it be justified to squeeze more “new” ciliates into such a genus ...
Herbivore diet breadth mediates the cascading effects of carnivores
... experimental tests have been limited in several regards. Comparative tests using multiple herbivore species in the same community show reduced attack rates by predators on dietary specialist vs. generalist species (e.g., refs. 20 and 22–24). These studies typically do not account for phylogenetic no ...
... experimental tests have been limited in several regards. Comparative tests using multiple herbivore species in the same community show reduced attack rates by predators on dietary specialist vs. generalist species (e.g., refs. 20 and 22–24). These studies typically do not account for phylogenetic no ...
Community and ecosystem effects of intraspecific genetic diversity in
... several lines of evidence suggest genetic diversity could indirectly influence composition and functioning by altering the nature of interactions between species. For example, there is now considerable evidence that the nature and intensity of competition between species is genotype-dependent (Turkin ...
... several lines of evidence suggest genetic diversity could indirectly influence composition and functioning by altering the nature of interactions between species. For example, there is now considerable evidence that the nature and intensity of competition between species is genotype-dependent (Turkin ...
Scaling environmental change through the community
... disturbance or CO2) and functional effect groups (species that exert similar effects on one or several ecosystem functions). While the distinction between response and effect has been used to describe competitive dynamics for some time, both phenomenologically (Goldberg & Werner, 1983) and for funct ...
... disturbance or CO2) and functional effect groups (species that exert similar effects on one or several ecosystem functions). While the distinction between response and effect has been used to describe competitive dynamics for some time, both phenomenologically (Goldberg & Werner, 1983) and for funct ...
G. Evelyn Hutchinson
... Major source of terrestrial diversity introduced by evolution of ~ 200.000 species or flowering plants ~ 750.000 species of insects ...
... Major source of terrestrial diversity introduced by evolution of ~ 200.000 species or flowering plants ~ 750.000 species of insects ...
Chapter 5
... colored advertising that enables experienced predators to recognize and avoid them. They flash a warning: “Eating me is risky.” Examples are brilliantly colored poisonous frogs (Figure 5-2e); and foul-tasting monarch butterflies (Figure 5-2d). For example, when a bird such as a blue jay eats a monar ...
... colored advertising that enables experienced predators to recognize and avoid them. They flash a warning: “Eating me is risky.” Examples are brilliantly colored poisonous frogs (Figure 5-2e); and foul-tasting monarch butterflies (Figure 5-2d). For example, when a bird such as a blue jay eats a monar ...
Trade-offs in community ecology: linking spatial scales and species
... that spatial processes are unimportant. The simplest of the models predict that in a spatially homogeneous locality, the number of coexisting species should be equal to or less than the number of limiting factors (MacArthur & Levins 1964; Levin 1970; Armstrong & McGehee 1980; Tilman 1982). This idea ...
... that spatial processes are unimportant. The simplest of the models predict that in a spatially homogeneous locality, the number of coexisting species should be equal to or less than the number of limiting factors (MacArthur & Levins 1964; Levin 1970; Armstrong & McGehee 1980; Tilman 1982). This idea ...
Role and consequences of fish diversity in the functioning of African
... The need for a better understanding of the role of biodiversity in the functioning of aquatic ecosystems has been raised recently by several authors. If the question is not entirely new, its formulation is. It is therefore the opportunity to re-examine the pool of data already available in order to ...
... The need for a better understanding of the role of biodiversity in the functioning of aquatic ecosystems has been raised recently by several authors. If the question is not entirely new, its formulation is. It is therefore the opportunity to re-examine the pool of data already available in order to ...
GLOBAL WARMING AND FLOWERING TIMES IN THOREAU`S
... decades. Early-flowering species, annuals, and insectpollinated species showed the greatest sensitivity to climate change (Fitter and Fitter 2002). Although their findings are significant, the observed trends may be valid only for Europe or central England, where the study took place. The purpose of ou ...
... decades. Early-flowering species, annuals, and insectpollinated species showed the greatest sensitivity to climate change (Fitter and Fitter 2002). Although their findings are significant, the observed trends may be valid only for Europe or central England, where the study took place. The purpose of ou ...
Latitudinal gradients and geographic ranges of
... These families include four of 18 (» 22%) of those families identi®ed by Daehler (1998) as contributing a disproportionately large proportion of the total number of widespread or serious weeds in agricultural and natural areas. As such, the plant families mapped in Europe do not appear to be taxonom ...
... These families include four of 18 (» 22%) of those families identi®ed by Daehler (1998) as contributing a disproportionately large proportion of the total number of widespread or serious weeds in agricultural and natural areas. As such, the plant families mapped in Europe do not appear to be taxonom ...
Competition between distantly related taxa
... resources A resource is an investigator-defined category that may determine the way to address the study of competition as well as the possibility of its detection. This is particularly apparent when the resource defined by the investigator undergoes ontogenetic changes or originates different struc ...
... resources A resource is an investigator-defined category that may determine the way to address the study of competition as well as the possibility of its detection. This is particularly apparent when the resource defined by the investigator undergoes ontogenetic changes or originates different struc ...
Reptiles - eolss.net
... Because of their relatively secretive habits, the majority of reptiles are not frequently encountered by humans, who generally remain neutral or positive in their attitude to all but large crocodilians and snakes. Yet their diversity and biomass would imply that reptiles play an important role in ma ...
... Because of their relatively secretive habits, the majority of reptiles are not frequently encountered by humans, who generally remain neutral or positive in their attitude to all but large crocodilians and snakes. Yet their diversity and biomass would imply that reptiles play an important role in ma ...
Test "Title" - Smithsonian Institution
... The origin of the seed-plant life history, and subsequent diversification of seed morphology, should be considered two independent, fundamentally distinct evolutionary problems. Gametophytic endospory may have arisen paedomorphically from homosporous ancestors, specifically by progenesis in the game ...
... The origin of the seed-plant life history, and subsequent diversification of seed morphology, should be considered two independent, fundamentally distinct evolutionary problems. Gametophytic endospory may have arisen paedomorphically from homosporous ancestors, specifically by progenesis in the game ...
Soft-bottom intertidal ecosystems shaped by ecosystem engineers
... in ecosystems (Rietkerk and van de Koppel 2008 and references therein). In contrast, an opposite interplay between local competition and large-scale facilitation through ecosystem engineering has also been observed (Bruno 2000; van de Koppel et al. 2006). These studies have in common that facilitati ...
... in ecosystems (Rietkerk and van de Koppel 2008 and references therein). In contrast, an opposite interplay between local competition and large-scale facilitation through ecosystem engineering has also been observed (Bruno 2000; van de Koppel et al. 2006). These studies have in common that facilitati ...
Diversity and Distributions
... theoretical assumption of niche conservatism and no possible evolutionary convergence, invaders that are phylogenetically very dissimilar to native communities have an almost null probability of invasion success, no matter of the spatial scale (zone A, Fig. 2). In this case, invaders are assumed to ...
... theoretical assumption of niche conservatism and no possible evolutionary convergence, invaders that are phylogenetically very dissimilar to native communities have an almost null probability of invasion success, no matter of the spatial scale (zone A, Fig. 2). In this case, invaders are assumed to ...
Ecological fitting
![](https://en.wikipedia.org/wiki/Special:FilePath/Colorado_potato_beetle.jpg?width=300)
Ecological fitting is ""the process whereby organisms colonize and persist in novel environments, use novel resources or form novel associations with other species as a result of the suites of traits that they carry at the time they encounter the novel condition.” It can be understood as a situation in which a species' interactions with its biotic and abiotic environment seem to indicate a history of coevolution, when in actuality the relevant traits evolved in response to a different set of biotic and abiotic conditions. The simplest form of ecological fitting is resource tracking, in which an organism continues to exploit the same resources, but in a new host or environment. In this framework, the organism occupies a multidimensional operative environment defined by the conditions in which it can persist, similar to the idea of the Hutchinsonian niche. In this case, a species can colonize new environments (e.g. an area with the same temperature and water regime) and/or form new species interactions (e.g. a parasite infecting a new host) which can lead to the misinterpretation of the relationship as coevolution, although the organism has not evolved and is continuing to exploit the same resources it always has. The more strict definition of ecological fitting requires that a species encounter an environment or host outside of its original operative environment and obtain realized fitness based on traits developed in previous environments that are now co-opted for a new purpose. This strict form of ecological fitting can also be expressed either as colonization of new habitat or the formation of new species interactions.