![Disturbance and trajectory of change in a stream fish community](http://s1.studyres.com/store/data/002263176_1-2287c11bc07951c4f5439cecdacd5769-300x300.png)
Disturbance and trajectory of change in a stream fish community
... reproduction after extreme droughts. The community had an early period of relatively gradual and directional change, but greater displacement than predicted at random after two consecutive extreme droughts midway through the study (1998 and 2000). But, the community subsequently returned toward its ...
... reproduction after extreme droughts. The community had an early period of relatively gradual and directional change, but greater displacement than predicted at random after two consecutive extreme droughts midway through the study (1998 and 2000). But, the community subsequently returned toward its ...
Viola, D., E. Mordecai, A. Jaramillo, S. Sistla, L
... limited insight into the operation of the tradeoff at the community level (i.e., across species). Therefore, though it is clear that consumers have some effect on species diversity, it remains unclear whether a competition–defense tradeoff is a widespread mechanism underlying consumer effects. In th ...
... limited insight into the operation of the tradeoff at the community level (i.e., across species). Therefore, though it is clear that consumers have some effect on species diversity, it remains unclear whether a competition–defense tradeoff is a widespread mechanism underlying consumer effects. In th ...
measuring seed dispersal - (CRSSA), Rutgers University
... Forested ecosystems have been commonly used to study LDD. Generally, it is predicted that a change in the disturbance regime that increases the number of patches (and light and nutrient availability) can increase not only the density of seedlings, but also the local range of a population. Seeds prod ...
... Forested ecosystems have been commonly used to study LDD. Generally, it is predicted that a change in the disturbance regime that increases the number of patches (and light and nutrient availability) can increase not only the density of seedlings, but also the local range of a population. Seeds prod ...
Crop domestication, global human-mediated migration, and the
... and plants have interacted for hundreds of millions of years, prior to the emergence of domesticated crops (Chen et al., 2015a). Therefore, agricultural crops are a recent ecological phenomenon for insect assemblages adapted to utilize wild ancestors. Crop domestication can have complex effects on t ...
... and plants have interacted for hundreds of millions of years, prior to the emergence of domesticated crops (Chen et al., 2015a). Therefore, agricultural crops are a recent ecological phenomenon for insect assemblages adapted to utilize wild ancestors. Crop domestication can have complex effects on t ...
Ecological speciation - Nosil Lab of Evolutionary Biology
... and, when they exist, the fitness of intermediate forms inhabiting them (Schluter 2000). If intermediate environments exist and intermediate phenotypes do well in them, then in theory it is possible for populations adapted to different environments to have diverged from one another by genetic drift ...
... and, when they exist, the fitness of intermediate forms inhabiting them (Schluter 2000). If intermediate environments exist and intermediate phenotypes do well in them, then in theory it is possible for populations adapted to different environments to have diverged from one another by genetic drift ...
Plant species traits are the predominant control on litter
... the subsequent quality of litter produced following leaf senescence are associated with the diversity of plant resource-acquisition strategies in a given biome (Aerts 1996; Reich et al. 1997; Aerts & Chapin 2000; Grime 2001; Diaz et al. 2004; Wright et al. 2004). Green leaf traits are modulated only ...
... the subsequent quality of litter produced following leaf senescence are associated with the diversity of plant resource-acquisition strategies in a given biome (Aerts 1996; Reich et al. 1997; Aerts & Chapin 2000; Grime 2001; Diaz et al. 2004; Wright et al. 2004). Green leaf traits are modulated only ...
how do different measures of functional diversity perform?
... exhibit a large diversity of above and below ground architectures should coexist, capture light, and forage resources more completely and efficiently than a community containing species all with similar architectures (Berendse 1983, Naeem et al. 1994). Hence, an accurate measure of functional divers ...
... exhibit a large diversity of above and below ground architectures should coexist, capture light, and forage resources more completely and efficiently than a community containing species all with similar architectures (Berendse 1983, Naeem et al. 1994). Hence, an accurate measure of functional divers ...
The effects of foliar pubescence and nutrient polymorpha (Myrtaceae)
... both influence arthropod food webs, but multifactor studies are needed to understand their interdependence and relative importance. Arthropods were sampled by clipping foliage from Metrosideros polymorpha (Myrtaceae) trees of pubescent, glabrous, and intermediate leaf forms on fertilised and unferti ...
... both influence arthropod food webs, but multifactor studies are needed to understand their interdependence and relative importance. Arthropods were sampled by clipping foliage from Metrosideros polymorpha (Myrtaceae) trees of pubescent, glabrous, and intermediate leaf forms on fertilised and unferti ...
PDF 428KB - University of Hawaii
... both influence arthropod food webs, but multifactor studies are needed to understand their interdependence and relative importance. Arthropods were sampled by clipping foliage from Metrosideros polymorpha (Myrtaceae) trees of pubescent, glabrous, and intermediate leaf forms on fertilised and unferti ...
... both influence arthropod food webs, but multifactor studies are needed to understand their interdependence and relative importance. Arthropods were sampled by clipping foliage from Metrosideros polymorpha (Myrtaceae) trees of pubescent, glabrous, and intermediate leaf forms on fertilised and unferti ...
Impacts of Pollutants on Beavers and Otters with Implications for
... suggest that they might serve together as a sentinel species unit in light of aquatic contamination. Considering the two species is interesting because of their shared habitat yet different trophic levels. River otters are common in and around beaver ponds (LeBlanc et al. 2007) and have been conside ...
... suggest that they might serve together as a sentinel species unit in light of aquatic contamination. Considering the two species is interesting because of their shared habitat yet different trophic levels. River otters are common in and around beaver ponds (LeBlanc et al. 2007) and have been conside ...
Biodiversity and Management of Natural Resources
... issue) or distinct stocks of anadromous species. Recently, Nehlsen et al. (1991) listed 214 native, naturally-spawning stocks of Pacific salmon, steelhead, and sea-run cutthroat at risk in Oregon, California, Washington, and Idaho. They also listed 106 major West Coast salmon and steelhead stocks th ...
... issue) or distinct stocks of anadromous species. Recently, Nehlsen et al. (1991) listed 214 native, naturally-spawning stocks of Pacific salmon, steelhead, and sea-run cutthroat at risk in Oregon, California, Washington, and Idaho. They also listed 106 major West Coast salmon and steelhead stocks th ...
The potential role of ecological corridors for habitat conservation in
... corridors have little potential for plants. Diaspore dispersal by livestock and wild mammals and birds is nevertheless important, and emphasis should be on maintaining animal movement within the landscape, especially in areas such as the Burren. The effectiveness of regional corridors is considerabl ...
... corridors have little potential for plants. Diaspore dispersal by livestock and wild mammals and birds is nevertheless important, and emphasis should be on maintaining animal movement within the landscape, especially in areas such as the Burren. The effectiveness of regional corridors is considerabl ...
empirical rules and assembly theory
... negative (Moyle et al., 1986). The need to increase our ability to predict the consequences of invasions and to understand invasion processes has been emphasized by the enormous economic and social costs of some recent invasions, the growing interest in halting biodiversity loss, and the increased d ...
... negative (Moyle et al., 1986). The need to increase our ability to predict the consequences of invasions and to understand invasion processes has been emphasized by the enormous economic and social costs of some recent invasions, the growing interest in halting biodiversity loss, and the increased d ...
Declining amphibian populations and possible ecological
... causes chytridiomycosis, are defined as the main causes for their declines (Halliday 2008, Lips et al. 2008, Stuart et al. 2008). Currently one in three amphibian species ...
... causes chytridiomycosis, are defined as the main causes for their declines (Halliday 2008, Lips et al. 2008, Stuart et al. 2008). Currently one in three amphibian species ...
The elephant in the room: the role of failed invasions
... be expected that summaries, titles, or key words would adequately sample and locate many cases of failed invasions. Therefore, we conducted extensive searches by querying academic search engines (ISI Web of Science and Google Scholar) using combinations of the key words introduction, naturalization ...
... be expected that summaries, titles, or key words would adequately sample and locate many cases of failed invasions. Therefore, we conducted extensive searches by querying academic search engines (ISI Web of Science and Google Scholar) using combinations of the key words introduction, naturalization ...
Ludwigia grandiflora
... The old branch has been used for fishing for many decades and several anglers noted that they had first observed L. grandiflora in 2004. The mechanism that introduced L. grandiflora into this water remains unknown, but the pathway may have been human activity. The starting point of the invasion was ...
... The old branch has been used for fishing for many decades and several anglers noted that they had first observed L. grandiflora in 2004. The mechanism that introduced L. grandiflora into this water remains unknown, but the pathway may have been human activity. The starting point of the invasion was ...
ECOLOGICAL FOOTPRINT T
... KEY Ex. 1 1. wood, 2. transport, 3. emissions, 4. necessary, 5. expressed, 6. productive, 7. developed, 8. measure. Ex. 2 ...
... KEY Ex. 1 1. wood, 2. transport, 3. emissions, 4. necessary, 5. expressed, 6. productive, 7. developed, 8. measure. Ex. 2 ...
Competitive avoidance not edaphic specialization drives vertical
... Along with changing abiotic resources and conditions, there are important differences in biotic factors with soil depth that may also play a role in driving the differential vertical distribution of EM fungi. It is widely recognized that the plant root density declines with increasing depth (Jackson ...
... Along with changing abiotic resources and conditions, there are important differences in biotic factors with soil depth that may also play a role in driving the differential vertical distribution of EM fungi. It is widely recognized that the plant root density declines with increasing depth (Jackson ...
Modelling coevolution in multispecies communities
... At this stage it is useful to introduce some notation used in the description of food webs. If one species preys on another then they are said to be linked. Basal species are those with predators but with no prey and top species are those with prey but with no predators. Intermediate species have bo ...
... At this stage it is useful to introduce some notation used in the description of food webs. If one species preys on another then they are said to be linked. Basal species are those with predators but with no prey and top species are those with prey but with no predators. Intermediate species have bo ...
arXiv:adap-org/9801003v1 16 Jan 1998
... At this stage it is useful to introduce some notation used in the description of food webs. If one species preys on another then they are said to be linked. Basal species are those with predators but with no prey and top species are those with prey but with no predators. Intermediate species have bo ...
... At this stage it is useful to introduce some notation used in the description of food webs. If one species preys on another then they are said to be linked. Basal species are those with predators but with no prey and top species are those with prey but with no predators. Intermediate species have bo ...
A succession of theories: purging redundancy from disturbance theory
... diversity (Pielou, 1966) and patch dynamics (White & Pickett, 1985;Wu & Loucks, 1995) are less directly relevant to the topic of succession and post-disturbance ecosystems than the succession and other disturbance-related theories that we have addressed. In this review, we largely focus on post-dist ...
... diversity (Pielou, 1966) and patch dynamics (White & Pickett, 1985;Wu & Loucks, 1995) are less directly relevant to the topic of succession and post-disturbance ecosystems than the succession and other disturbance-related theories that we have addressed. In this review, we largely focus on post-dist ...
Stability and complexity : a reappraisal of the Competitive Exclusion
... previous mathematical approaches that demonstrated that simple stable systems are destabilized through added complexity, the approach presented herein began with a model that was unstable. This perspective provided allows model complexity and at the ...
... previous mathematical approaches that demonstrated that simple stable systems are destabilized through added complexity, the approach presented herein began with a model that was unstable. This perspective provided allows model complexity and at the ...
Army ants in four forests
... impact are remarkably limited. In Neotropical lowland wet forest sites, however, the army ant community can comprise 20 or more sympatric species (Rettenmeyer et al. 1983; Quiroz-Robledo, Valenzuela-González and Suárez-Landa 2002). All army ants employ coordinated raiding behaviour (Brady 2003), but ...
... impact are remarkably limited. In Neotropical lowland wet forest sites, however, the army ant community can comprise 20 or more sympatric species (Rettenmeyer et al. 1983; Quiroz-Robledo, Valenzuela-González and Suárez-Landa 2002). All army ants employ coordinated raiding behaviour (Brady 2003), but ...
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.