![Debate 2 – Exotics Species and the Chesapeake Bay Group C](http://s1.studyres.com/store/data/002156888_1-918f9e19bb2610e67724835140eb181f-300x300.png)
Debate 2 – Exotics Species and the Chesapeake Bay Group C
... establishing oyster reefs, created by oysters growing upon each other in layers to form a hard surface over the bottom. These structures, which the native oysters naturally grow in, act as a protector of the biodiversity in this environment. Oyster reefs provide habitats for other aquatic species, p ...
... establishing oyster reefs, created by oysters growing upon each other in layers to form a hard surface over the bottom. These structures, which the native oysters naturally grow in, act as a protector of the biodiversity in this environment. Oyster reefs provide habitats for other aquatic species, p ...
Direct and indirect effects of the introduced alga Sargassum
... substratum in close proximity to the parent plant (Deysher & Norton 1982). Sargassum muticum removal experiments. I designed experiments to test the hypothesis that the presence of S. muticum was influencing the structure of the native community. During June 1999, 2 removal experiments were simultan ...
... substratum in close proximity to the parent plant (Deysher & Norton 1982). Sargassum muticum removal experiments. I designed experiments to test the hypothesis that the presence of S. muticum was influencing the structure of the native community. During June 1999, 2 removal experiments were simultan ...
pdf. - Robert Colwell
... In practice, this approach is routinely impossible for two reasons. First, the number of individuals that must be sampled to reach an asymptote can often be prohibitively large (Chao et al. 2009). The problem is most severe in the tropics, where species diversity is high and most species are rare. F ...
... In practice, this approach is routinely impossible for two reasons. First, the number of individuals that must be sampled to reach an asymptote can often be prohibitively large (Chao et al. 2009). The problem is most severe in the tropics, where species diversity is high and most species are rare. F ...
Biological Diversity - FIU Faculty Websites
... In practice, this approach is routinely impossible for two reasons. First, the number of individuals that must be sampled to reach an asymptote can often be prohibitively large (Chao et al. 2009). The problem is most severe in the tropics, where species diversity is high and most species are rare. F ...
... In practice, this approach is routinely impossible for two reasons. First, the number of individuals that must be sampled to reach an asymptote can often be prohibitively large (Chao et al. 2009). The problem is most severe in the tropics, where species diversity is high and most species are rare. F ...
Endophytic fungi alter relationships between diversity and
... example, Klironomos et al. (2000) showed that mycorrhizae caused primary productivity to level off more quickly with increasing diversity than when mycorrhizae were absent. Similarly, other symbionts, such as nitrogen-fixing bacteria, can alter ecosystem functioning and the composition of plant comm ...
... example, Klironomos et al. (2000) showed that mycorrhizae caused primary productivity to level off more quickly with increasing diversity than when mycorrhizae were absent. Similarly, other symbionts, such as nitrogen-fixing bacteria, can alter ecosystem functioning and the composition of plant comm ...
predation risk affects relative strength of top-down
... moderate or enhance top-down impacts (Moran et al. 1996, Fagan 1997, Losey and Denno 1998, Rosenheim 1998, Sih et al. 1998). There are also several recent studies showing that structural features of host plants can temper intraguild predation (Roda et al. 2000, Norton et al. 2001, Finke and Denno 20 ...
... moderate or enhance top-down impacts (Moran et al. 1996, Fagan 1997, Losey and Denno 1998, Rosenheim 1998, Sih et al. 1998). There are also several recent studies showing that structural features of host plants can temper intraguild predation (Roda et al. 2000, Norton et al. 2001, Finke and Denno 20 ...
Invasive Plants: Ecological and Agricultural Aspects
... to the rapidly growing and essential invasions literature. Dan Simberloff (2004)1 has amusingly noted that the number of recent invasion-oriented book volumes has actually eclipsed the number of some invading taxa; a sobering reflection of the ecological, economic and sociological problems posed by ...
... to the rapidly growing and essential invasions literature. Dan Simberloff (2004)1 has amusingly noted that the number of recent invasion-oriented book volumes has actually eclipsed the number of some invading taxa; a sobering reflection of the ecological, economic and sociological problems posed by ...
TAKE A LOOK at the Grayling Complaint filed by WWP ()
... alleged herein, but FWS has failed to comply with these demands and continues to do so. An actual controversy therefore exists between the parties within the meaning of 28 U.S.C. § 2201(a) (Declaratory Judgment). ...
... alleged herein, but FWS has failed to comply with these demands and continues to do so. An actual controversy therefore exists between the parties within the meaning of 28 U.S.C. § 2201(a) (Declaratory Judgment). ...
1.30. How likely is the pest to spread rapidly in the PRA area by
... 1.23. How likely is it that existing pest likely/medium In some countries, water bodies are managed by using herbicides to control aquatic weeds. However, measures like the application of systemic herbicides can be a danger for management practice will fail to prevent uncertainty the water body or a ...
... 1.23. How likely is it that existing pest likely/medium In some countries, water bodies are managed by using herbicides to control aquatic weeds. However, measures like the application of systemic herbicides can be a danger for management practice will fail to prevent uncertainty the water body or a ...
Common Sea Life of Southeastern Alaska
... Most people who live or visit Southeast Alaska have some idea of the incredible diversity of nature found here. From mountain tops to the cold, dark depths of our many fjords, life is everywhere. The marine life of SE Alaska is exceptionally diverse for several reasons. One is simply the amount of c ...
... Most people who live or visit Southeast Alaska have some idea of the incredible diversity of nature found here. From mountain tops to the cold, dark depths of our many fjords, life is everywhere. The marine life of SE Alaska is exceptionally diverse for several reasons. One is simply the amount of c ...
Picture perception in animals: what about faces?
... function effectively is the ability to identify individuals within the group, and to interpret their expressions and intentions. In humans, face-processing abilities underpin such functions (Bruce & Young 1998). If it can be established that all primates show similar face processing abilities that w ...
... function effectively is the ability to identify individuals within the group, and to interpret their expressions and intentions. In humans, face-processing abilities underpin such functions (Bruce & Young 1998). If it can be established that all primates show similar face processing abilities that w ...
Habitat alteration and community-level effects of an exotic mussel
... and how estuarine exotics can alter the physical nature of ecosystems. However, there is limited evidence that resident assemblages can be changed by invasive ecosystem engineers, for example, through the construction of habitat by autotrophs (Posey 1988) or the destruction of habitat by herbivores ...
... and how estuarine exotics can alter the physical nature of ecosystems. However, there is limited evidence that resident assemblages can be changed by invasive ecosystem engineers, for example, through the construction of habitat by autotrophs (Posey 1988) or the destruction of habitat by herbivores ...
8. Eleutherodactylus planirostris, the Greenhouse Frog
... communities, the greenhouse frog diet was determined at 10 sites on the island of Hawaii (Olson and Beard in press). Greenhouse frogs were found to primarily consume leaf litter invertebrates and were estimated to consume up to 129,000 invertebrates ha-1 night-1 (Olson and Beard in press). Because t ...
... communities, the greenhouse frog diet was determined at 10 sites on the island of Hawaii (Olson and Beard in press). Greenhouse frogs were found to primarily consume leaf litter invertebrates and were estimated to consume up to 129,000 invertebrates ha-1 night-1 (Olson and Beard in press). Because t ...
On the structural stability of mutualistic systems
... given amplitude (14–17). A technical definition of these different types of dynamical stability and their relationship is provided in (18). In most of these stability studies, however, a feasible equilibrium point is always assumed without rigorously studying the set of conditions allowing its exist ...
... given amplitude (14–17). A technical definition of these different types of dynamical stability and their relationship is provided in (18). In most of these stability studies, however, a feasible equilibrium point is always assumed without rigorously studying the set of conditions allowing its exist ...
Invasive alien species in Switzerland
... All signatories to the Convention on Biological Diversity (CBD), including Switzerland, have agreed to prevent the introduction of, control or eradicate those alien species which threaten ecosystems, habitats or species. There is a widespread view that IAS are of less concern in Central Europe than ...
... All signatories to the Convention on Biological Diversity (CBD), including Switzerland, have agreed to prevent the introduction of, control or eradicate those alien species which threaten ecosystems, habitats or species. There is a widespread view that IAS are of less concern in Central Europe than ...
The coexistence of species - Revista Chilena de Historia Natural
... exhibit differential responses. It is impossible to identify all of the relevant niche axes in a given community or assemblage. Even among those variables that can be identified as important niche axes in certain situations, there are many that are difficult or impossible to measure empirically. Thu ...
... exhibit differential responses. It is impossible to identify all of the relevant niche axes in a given community or assemblage. Even among those variables that can be identified as important niche axes in certain situations, there are many that are difficult or impossible to measure empirically. Thu ...
Taxonomy and Evolution of the Cotton Genus, Gossypium
... The current circumscription of Gossypium presently includes approximately 50 species (Fryxell, 1992), although new species continue to be discovered (Alvarez and Wendel, 2006; Grover et al., 2014; Krapovickas and Seijo, 2008; Stewart et al., 2015; Ulloa et al., 2006). Morphologically, the genus is e ...
... The current circumscription of Gossypium presently includes approximately 50 species (Fryxell, 1992), although new species continue to be discovered (Alvarez and Wendel, 2006; Grover et al., 2014; Krapovickas and Seijo, 2008; Stewart et al., 2015; Ulloa et al., 2006). Morphologically, the genus is e ...
Evolution and Ecology of Species Range Limits
... processes. A central goal in evolutionary biology is understanding conditions that facilitate adaptive diversification versus those that promote niche conservatism. Adaptation to novel habitats at the range margin is akin to niche evolution (see Holt & Gomulkiewicz 1997 for a classic introduction to ...
... processes. A central goal in evolutionary biology is understanding conditions that facilitate adaptive diversification versus those that promote niche conservatism. Adaptation to novel habitats at the range margin is akin to niche evolution (see Holt & Gomulkiewicz 1997 for a classic introduction to ...
The ecological, economic and public health impacts of nuisance
... with microorganisms (Halpern et al. 2004; Halpern et al. 2006; Halpern et al. 2007; Raz et al. 2010; Senderovich and Halpern 2012), and their use as indicator species (Wilson and McGill 1977; Ruse and Wilson 1994), but very few focus on the potential impacts of introductions of non-native chironomid ...
... with microorganisms (Halpern et al. 2004; Halpern et al. 2006; Halpern et al. 2007; Raz et al. 2010; Senderovich and Halpern 2012), and their use as indicator species (Wilson and McGill 1977; Ruse and Wilson 1994), but very few focus on the potential impacts of introductions of non-native chironomid ...
Ecosystem engineering and biodiversity in coastal sediments
... the engineering community by removing autogenic ecosystem engineers through coastal engineering or bottom trawling. Another source of anthropogenic inXuences comes from introducing invasive engineers, from which the impact is often hard to predict. We hypothesise that the local biodiversity eVects o ...
... the engineering community by removing autogenic ecosystem engineers through coastal engineering or bottom trawling. Another source of anthropogenic inXuences comes from introducing invasive engineers, from which the impact is often hard to predict. We hypothesise that the local biodiversity eVects o ...
Arthropods Associated with Xeric Longleaf Pine Habitats in the
... Spiders are the most conspicuous arachnids in longleaf pine habitats, but in both numbers of species and nu;mbers of individuals, mites (Acari) greatly exceed the spiders. Most mites, however, are so small that they escape notice. Many mite species are associated with litter or soil. A number parasi ...
... Spiders are the most conspicuous arachnids in longleaf pine habitats, but in both numbers of species and nu;mbers of individuals, mites (Acari) greatly exceed the spiders. Most mites, however, are so small that they escape notice. Many mite species are associated with litter or soil. A number parasi ...
Daphnia as keystone predators - Orlando Sarnelle
... from estimates of average cell volume, assuming that phytoplankton have a specific gravity of 1 and a dry : wet mass ratio of 0.10 (Rieman and Falter, 1981). To assess Daphnia’s effects on phytoplankton assemblage structure, relative abundance data for the 10 most common species were subjected to pr ...
... from estimates of average cell volume, assuming that phytoplankton have a specific gravity of 1 and a dry : wet mass ratio of 0.10 (Rieman and Falter, 1981). To assess Daphnia’s effects on phytoplankton assemblage structure, relative abundance data for the 10 most common species were subjected to pr ...
SEB Vol 60, Issue 3 – July 2013 - Association of Southeastern
... Top visitors this year were GA, NC, and TN. Top visitors were obviously coming from the state where the meeting was held. Our Facebook page received 375 “likes” during the past year. The most common age range of visitors was 25-34. Ashley proposed that we have another photo contest. Discussion follo ...
... Top visitors this year were GA, NC, and TN. Top visitors were obviously coming from the state where the meeting was held. Our Facebook page received 375 “likes” during the past year. The most common age range of visitors was 25-34. Ashley proposed that we have another photo contest. Discussion follo ...
Indirect effects of phorid ¯y parasitoids on the mechanisms of
... of one species alters the abundance of a second species through the change in abundance of a third species with which the ®rst two species interact). These types of indirect eects have been termed abundance indirect eects (Strauss 1991), interaction chains (Wootton 1994a), trophic linkage indirect ...
... of one species alters the abundance of a second species through the change in abundance of a third species with which the ®rst two species interact). These types of indirect eects have been termed abundance indirect eects (Strauss 1991), interaction chains (Wootton 1994a), trophic linkage indirect ...
The olfactory component of floral display in Asimina and
... rugelii differs from the other species described here, having yellow flowers and a faint rubbery scent. The flowers of sweetsmelling Asimina species have large petals, whereas those of D. pulchellus and D. rugelii are highly reduced in size (Fig. 1). One other species of Annonaceae, Annona glabra (F ...
... rugelii differs from the other species described here, having yellow flowers and a faint rubbery scent. The flowers of sweetsmelling Asimina species have large petals, whereas those of D. pulchellus and D. rugelii are highly reduced in size (Fig. 1). One other species of Annonaceae, Annona glabra (F ...
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.