![The Biology of Chameleons](http://s1.studyres.com/store/data/017614475_1-2bee3dde63dcbb21cb9b1abc2fdd3f9a-300x300.png)
The Biology of Chameleons
... is linked to their invasion of the arboreal habitat some 45 million years ago. Today, there are distinct centers of diversity, particularly in East Africa and Madagascar, that have elevated species richness and endemism. Although the fossil record is scarce, the clues provided by fossils that lead u ...
... is linked to their invasion of the arboreal habitat some 45 million years ago. Today, there are distinct centers of diversity, particularly in East Africa and Madagascar, that have elevated species richness and endemism. Although the fossil record is scarce, the clues provided by fossils that lead u ...
Chap21 test review
... 25. Explain why two different species in an ecosystem can share the same habitat but not the same niche. 26. Explain the difference between a population and a community. Explain at least 2 examples. 27. Define abiotic factor and give four examples. Why might these factors be important to the biotic ...
... 25. Explain why two different species in an ecosystem can share the same habitat but not the same niche. 26. Explain the difference between a population and a community. Explain at least 2 examples. 27. Define abiotic factor and give four examples. Why might these factors be important to the biotic ...
Research paper: Biotic Homogenisation
... biotic homogenisation, is continued clarification on the significant ecological, evolutionary and social consequences of this phenomenon. Biotic homogenisation is now considered one of the most prominent forms of biotic impoverishment worldwide, and it will likely continue to increase in response to a ...
... biotic homogenisation, is continued clarification on the significant ecological, evolutionary and social consequences of this phenomenon. Biotic homogenisation is now considered one of the most prominent forms of biotic impoverishment worldwide, and it will likely continue to increase in response to a ...
Exploring indirect effects of biological invasions on native ecosystems
... spread of harmful species has increased in the past several decades because of human-caused introduction and disturbance (Elton 1958, Wilcove et al. 1998), and invasives are becoming key factors in global environmental change (Wilcove et al. 1998, Theoharides and Dukes 2007). Most biological invasio ...
... spread of harmful species has increased in the past several decades because of human-caused introduction and disturbance (Elton 1958, Wilcove et al. 1998), and invasives are becoming key factors in global environmental change (Wilcove et al. 1998, Theoharides and Dukes 2007). Most biological invasio ...
Rethinking Community Assembly through the Lens
... complicated and dynamic. For one, the niche of a species includes both its response to and impact on the abiotic and biotic environment (as emphasized by Hutchinson and Elton, respectively; Hutchinson 1957, Chase & Leibold 2003). Thus, while an environmental filter may reasonably describe how abiotic ...
... complicated and dynamic. For one, the niche of a species includes both its response to and impact on the abiotic and biotic environment (as emphasized by Hutchinson and Elton, respectively; Hutchinson 1957, Chase & Leibold 2003). Thus, while an environmental filter may reasonably describe how abiotic ...
behavioral responses to `alarm odors` in potentially invasive and non
... Two North American crayfish species, the Eastern white river crayfish, Procambarus acutus acutus, and the red swamp crayfish, P. clarkii, were studied in the laboratory for their responses to food odors and to cues released by injured conspecifics and heterospecifics. The two species differ in that ...
... Two North American crayfish species, the Eastern white river crayfish, Procambarus acutus acutus, and the red swamp crayfish, P. clarkii, were studied in the laboratory for their responses to food odors and to cues released by injured conspecifics and heterospecifics. The two species differ in that ...
Succession
... Secondary Succession This series shows secondary succession taking place in abandoned fields of the Carolinas’ Piedmont. Over the last century, these fields have passed through several stages and matured into oak forests. Changes will continue for years to come. ...
... Secondary Succession This series shows secondary succession taking place in abandoned fields of the Carolinas’ Piedmont. Over the last century, these fields have passed through several stages and matured into oak forests. Changes will continue for years to come. ...
occurrence of native and introduced crayfish in northeastern
... crayfish species : the noble crayfish Astacus astacus (L.) and the narrow-clawed crayfish Astacus leptodactylus (Esch.) (ALBRECHT, 1983). The noble crayfish is found in nearly all parts of Germany and Poland, while the narrow-clawed crayfish is restricted to some areas in southwestern and northeaste ...
... crayfish species : the noble crayfish Astacus astacus (L.) and the narrow-clawed crayfish Astacus leptodactylus (Esch.) (ALBRECHT, 1983). The noble crayfish is found in nearly all parts of Germany and Poland, while the narrow-clawed crayfish is restricted to some areas in southwestern and northeaste ...
The Impact of Non-Native Species - Case Study: The Signal Crayfish
... trades, in bait buckets and netting, and so forth. Fish and invertebrate species introduced either from overseas or beyond their natural distribution within the UK often pose significant threats to native populations of plants and animals. They predate, outcompete and displace native species from th ...
... trades, in bait buckets and netting, and so forth. Fish and invertebrate species introduced either from overseas or beyond their natural distribution within the UK often pose significant threats to native populations of plants and animals. They predate, outcompete and displace native species from th ...
Options and limitations of statistical modelling as a tool for
... functional changes are at least as important as changes in biodiversity and species composition and the unsatisfying performance of many species-based indicators, especially in areas with high natural stress such as brackish or transitional waters. Besides the limited knowledge on the autecology of ...
... functional changes are at least as important as changes in biodiversity and species composition and the unsatisfying performance of many species-based indicators, especially in areas with high natural stress such as brackish or transitional waters. Besides the limited knowledge on the autecology of ...
Herbicidal effect of Ailanthus altissima leaves water extracts on
... The obtained results clearly showed the reduction in plant germination rate by the increased concentration of extracts. Although between groups 2 and 3 there was no significant difference in seedling emergence, the difference between other groups, especially group 1 and control group showed the stro ...
... The obtained results clearly showed the reduction in plant germination rate by the increased concentration of extracts. Although between groups 2 and 3 there was no significant difference in seedling emergence, the difference between other groups, especially group 1 and control group showed the stro ...
- D-Scholarship@Pitt
... Plant traits and tradeoffs lie at the core of species coexistence theory, and they are predicted to be the key drivers of plant community dynamics and resulting structure. Tilman (1988, 1990) has argued that species-specific allocation tradeoffs should correlate with hierarchies of competitive abili ...
... Plant traits and tradeoffs lie at the core of species coexistence theory, and they are predicted to be the key drivers of plant community dynamics and resulting structure. Tilman (1988, 1990) has argued that species-specific allocation tradeoffs should correlate with hierarchies of competitive abili ...
grazer diversity, functional redundancy, and productivity in seagrass
... the variable. At a mechanistic level, however, the characteristics of individual species are fundamental to explaining the existence and form of such relationships (Aarssen 1997, Hooper and Vitousek 1997, Huston 1997, Tilman et al. 1997a, Wardle et al. 1997). Specifically, the relationship will depe ...
... the variable. At a mechanistic level, however, the characteristics of individual species are fundamental to explaining the existence and form of such relationships (Aarssen 1997, Hooper and Vitousek 1997, Huston 1997, Tilman et al. 1997a, Wardle et al. 1997). Specifically, the relationship will depe ...
the maintenance of species diversity by disturbance
... number of individuals, since a single small disturbance may kill one or many individuals or, in a clonal organism, destroy only part of an individual. O u r simple notion of size does not distinguish the ways in which an area may be disrupted. A fire and a hailstorm sweeping across ten hectares have ...
... number of individuals, since a single small disturbance may kill one or many individuals or, in a clonal organism, destroy only part of an individual. O u r simple notion of size does not distinguish the ways in which an area may be disrupted. A fire and a hailstorm sweeping across ten hectares have ...
Chapter 5 Biotic interactions and temporal patterns forLandslide
... landslide, may follow similar or different rates and trajectories of succession. These variable pathways enrich the spatial and temporal heterogeneity of landslides and provide a complexity to landslides not always found in other examples of primary succession (Shiels et al., 2008). Drivers oflandsl ...
... landslide, may follow similar or different rates and trajectories of succession. These variable pathways enrich the spatial and temporal heterogeneity of landslides and provide a complexity to landslides not always found in other examples of primary succession (Shiels et al., 2008). Drivers oflandsl ...
Patterns and Consequences of Interspecific Competition
... patterns (five experiments), on relative abundances (two experiments), and on diversity (four experiments), consistent with the notion that competition has strong effects on community structure. On the other hand, intraspecific competition was not usually stronger than interspecific competition for ...
... patterns (five experiments), on relative abundances (two experiments), and on diversity (four experiments), consistent with the notion that competition has strong effects on community structure. On the other hand, intraspecific competition was not usually stronger than interspecific competition for ...
Bioeconomics and biodiversity in harvested metacommunities: a
... habitat patches. With this approach, it becomes (relatively) simple to include more species than can typically be included in models that track species population density. We use this patch-occupancy framework to understand how profit and biodiversity are impacted by (1) community assembly, (2) pric ...
... habitat patches. With this approach, it becomes (relatively) simple to include more species than can typically be included in models that track species population density. We use this patch-occupancy framework to understand how profit and biodiversity are impacted by (1) community assembly, (2) pric ...
Competitive Response Hierarchies for Germination
... some life history stages may influence final abundance more than others, these differences in importance may be independent of the intensity of competition (Welden and Slauson 1986). To further understand the influence of competition on corninunity structure. we need to compare the intensity of comp ...
... some life history stages may influence final abundance more than others, these differences in importance may be independent of the intensity of competition (Welden and Slauson 1986). To further understand the influence of competition on corninunity structure. we need to compare the intensity of comp ...
Discriminating trait-convergence and trait
... plant communities in south Brazil, one set in natural grassland experimental plots under different nitrogen and grazing levels, and another in sapling communities colonizing Araucaria forest patches of increasing size in a forest-grassland mosaic. In these cases, depending on the traits considered, ...
... plant communities in south Brazil, one set in natural grassland experimental plots under different nitrogen and grazing levels, and another in sapling communities colonizing Araucaria forest patches of increasing size in a forest-grassland mosaic. In these cases, depending on the traits considered, ...
THE RELATIONSHIP BETWEEN PRODUCTIVITY AND SPECIES
... be nonlinear (52, 209). Ecosystem function changes rapidly as species representing new functional groups are added, but less rapidly when new species are redundant of existing functional groups. Lawton (102) proposed a model in which species may have strong, idiosyncratic effects on ecosystems. If t ...
... be nonlinear (52, 209). Ecosystem function changes rapidly as species representing new functional groups are added, but less rapidly when new species are redundant of existing functional groups. Lawton (102) proposed a model in which species may have strong, idiosyncratic effects on ecosystems. If t ...
THE RELATIONSHIP BETWEEN PRODUCTIVITY AND SPECIES
... be nonlinear (52, 209). Ecosystem function changes rapidly as species representing new functional groups are added, but less rapidly when new species are redundant of existing functional groups. Lawton (102) proposed a model in which species may have strong, idiosyncratic effects on ecosystems. If t ...
... be nonlinear (52, 209). Ecosystem function changes rapidly as species representing new functional groups are added, but less rapidly when new species are redundant of existing functional groups. Lawton (102) proposed a model in which species may have strong, idiosyncratic effects on ecosystems. If t ...
Ant community change across a ground vegetation
... of species that can recruit to food but are not overwhelmingly numerically or behaviorally dominant. Species with consistently high scores (5-6) are potentially important competitors that could deny other ants access to resources such as food and nesting sites. Our categories make it easier to not o ...
... of species that can recruit to food but are not overwhelmingly numerically or behaviorally dominant. Species with consistently high scores (5-6) are potentially important competitors that could deny other ants access to resources such as food and nesting sites. Our categories make it easier to not o ...
Invasive ants alter the phylogenetic structure on native communities
... 1977; Parr et al., 2005; Sanders and Gordon, 2003; Savolainen and Vepsäläinen, 1988; Yanoviak and Kaspari, 2000). Hölldobler and Wilson (1990) noted that competition is ‘the hallmark of ant ecology’, and numerous studies have indicated that competition can shape ant communities (Andersen, 1992; Bern ...
... 1977; Parr et al., 2005; Sanders and Gordon, 2003; Savolainen and Vepsäläinen, 1988; Yanoviak and Kaspari, 2000). Hölldobler and Wilson (1990) noted that competition is ‘the hallmark of ant ecology’, and numerous studies have indicated that competition can shape ant communities (Andersen, 1992; Bern ...
Common seashore animals of Southeastern Alaska
... Interest in preserving this fragile and important creatures has resulted in the creation of areas where fishing activity is ...
... Interest in preserving this fragile and important creatures has resulted in the creation of areas where fishing activity is ...
Scientific Canadian
... Department of Earth and Ocean Sciences. “Historically, jellyfish have slipped through the cracks,” says Brotz. “They were perceived as an unimportant nuisance to fisheries scientists, yet they are too big to be studied by planktologists. But we now know that they’re very important in the marine ecos ...
... Department of Earth and Ocean Sciences. “Historically, jellyfish have slipped through the cracks,” says Brotz. “They were perceived as an unimportant nuisance to fisheries scientists, yet they are too big to be studied by planktologists. But we now know that they’re very important in the marine ecos ...
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.