![Felis nigripes, Black-footed Cat](http://s1.studyres.com/store/data/017560758_1-f515f114329403783002bba414f18f1b-300x300.png)
Felis nigripes, Black-footed Cat
... Habitat and Ecology (see Appendix for additional information) The black-footed cat is a specialist of open, short grass areas with an abundance of small rodents and ground-roosting birds. It inhabits dry, open savanna, grasslands and Karoo semi-desert with sparse shrub and tree cover and a mean annu ...
... Habitat and Ecology (see Appendix for additional information) The black-footed cat is a specialist of open, short grass areas with an abundance of small rodents and ground-roosting birds. It inhabits dry, open savanna, grasslands and Karoo semi-desert with sparse shrub and tree cover and a mean annu ...
Negative competitive effects of invasive plants change with time
... 2000), consumptive (Pimm 1987) or avoidance responses (Cox and Lima 2006). For instance, invasive plant growth has been found to be more suppressed by negative soil feedbacks with time since invasion (Diez et al. 2010). Abundance of the invader will also change over time, though the relationship bet ...
... 2000), consumptive (Pimm 1987) or avoidance responses (Cox and Lima 2006). For instance, invasive plant growth has been found to be more suppressed by negative soil feedbacks with time since invasion (Diez et al. 2010). Abundance of the invader will also change over time, though the relationship bet ...
bYTEBoss Conservation Ecology PPT
... Habitat Loss • Human alteration of habitat is the greatest threat to biodiversity throughout the biosphere • In almost all cases, habitat fragmentation and destruction lead to loss of biodiversity • For example – In Wisconsin, prairie occupies <0.1% of its original area – About 93% of coral reefs h ...
... Habitat Loss • Human alteration of habitat is the greatest threat to biodiversity throughout the biosphere • In almost all cases, habitat fragmentation and destruction lead to loss of biodiversity • For example – In Wisconsin, prairie occupies <0.1% of its original area – About 93% of coral reefs h ...
Hegland and Totland 2005. Relationships between species` floral
... plant species in the community to potential pollinators, we conducted a visitation survey inside 20 permanent plots of 1.5·1.5 m, randomly positioned at the start of the fieldwork and used throughout the entire season. Within the plots, we monitored the visitation frequency by counting the number of ...
... plant species in the community to potential pollinators, we conducted a visitation survey inside 20 permanent plots of 1.5·1.5 m, randomly positioned at the start of the fieldwork and used throughout the entire season. Within the plots, we monitored the visitation frequency by counting the number of ...
Conserving Biological Diversity in Agricultural/Forestry Systems
... developing countries. This excessive consumption diminishes biodiversity directly. Even where progressive laws and land preservation efforts do exist in developed and developing nations, the increasing resource demands of humans and their industries undermine any chance of progress in biodiversity p ...
... developing countries. This excessive consumption diminishes biodiversity directly. Even where progressive laws and land preservation efforts do exist in developed and developing nations, the increasing resource demands of humans and their industries undermine any chance of progress in biodiversity p ...
Null Models in Ecology
... form of lognormal distribution-the canonical lognormal (66, 85, 1 1 8). There is a specified, positive relationship between the variance of the distribution and the number of species·in the community, so that one less parameter is needed to define the distribution (71 ) . Furthermore, an inverse mea ...
... form of lognormal distribution-the canonical lognormal (66, 85, 1 1 8). There is a specified, positive relationship between the variance of the distribution and the number of species·in the community, so that one less parameter is needed to define the distribution (71 ) . Furthermore, an inverse mea ...
Different but equal: the implausible assumption at the heart of
... (Clark 2004), we could formalize this expectation as a prior for the distribution of communities along the niche-strength continuum (Ellison 2004). Outside of a formal Bayesian framework, we can rather ask: if the current empirical evidence does not strongly distinguish between neutrality and niches ...
... (Clark 2004), we could formalize this expectation as a prior for the distribution of communities along the niche-strength continuum (Ellison 2004). Outside of a formal Bayesian framework, we can rather ask: if the current empirical evidence does not strongly distinguish between neutrality and niches ...
Coexistence and invasibility in a two-species competition
... (1994). Studying the properties of the dynamics toward extinction is, however, interesting and informative (Chesson and Warner, 1981; Chesson, 1982). In particular, the time needed for the extinction of one of the species is important to understand how crucially biodiversity depends on a steady immi ...
... (1994). Studying the properties of the dynamics toward extinction is, however, interesting and informative (Chesson and Warner, 1981; Chesson, 1982). In particular, the time needed for the extinction of one of the species is important to understand how crucially biodiversity depends on a steady immi ...
Global patterns of stream detritivore distribution: implications
... 30.161-970, Belo Horizonte, MG, Brazil, 15Sri Paramakalyani Centre for Environmental Sciences, Manonmainam ...
... 30.161-970, Belo Horizonte, MG, Brazil, 15Sri Paramakalyani Centre for Environmental Sciences, Manonmainam ...
Changes in habitat heterogeneity alter marine sessile benthic
... changing environment where rates of species introductions and extinction are increasing, the dynamic nature of habitat heterogeneity needs to be incorporated in ecological theory given the rapid habitat changes occurring at the landscape level. One obvious cause of change in spatial habitat heteroge ...
... changing environment where rates of species introductions and extinction are increasing, the dynamic nature of habitat heterogeneity needs to be incorporated in ecological theory given the rapid habitat changes occurring at the landscape level. One obvious cause of change in spatial habitat heteroge ...
Patterns of Plant Diversity in Georgia and Texas Salt Marshes
... major creeks or channels were encountered) and continued perpendicular to the water’s edge up to the shrub community at the upper marsh border. At each 1-m interval along the transect, we located a 1×5 m plot, with the long axis of the plot parallel to the water’s edge and recorded each plant specie ...
... major creeks or channels were encountered) and continued perpendicular to the water’s edge up to the shrub community at the upper marsh border. At each 1-m interval along the transect, we located a 1×5 m plot, with the long axis of the plot parallel to the water’s edge and recorded each plant specie ...
Prioritizing Ecosystems, Species, and Sites for Restoration
... by Wimberly et al. (2000), who used a ‘landscape age-class demographic simulator’ to integrate dendroecological and paleoecological data and estimate historical variability in the proportion of old-growth and late-successional forests in a forest landscape with a simulated historical fire regime. In ...
... by Wimberly et al. (2000), who used a ‘landscape age-class demographic simulator’ to integrate dendroecological and paleoecological data and estimate historical variability in the proportion of old-growth and late-successional forests in a forest landscape with a simulated historical fire regime. In ...
Floristic composition and environmental determinants of pine forests
... forests are presumed to show a high floristic similarity to analogous communities described from Poland and Germany such as the Peucedano-Pinetum W. Matuszkiewicz 1962 (HEINKEN 2008b). In Central and Eastern Europe these Pyroloideae-rich communities have become very rare since the middle of the last ...
... forests are presumed to show a high floristic similarity to analogous communities described from Poland and Germany such as the Peucedano-Pinetum W. Matuszkiewicz 1962 (HEINKEN 2008b). In Central and Eastern Europe these Pyroloideae-rich communities have become very rare since the middle of the last ...
Experimental evidence that the introduced fire ant, Solenopsis
... Summary 1. The fire ant, Solenopsis invicta, is a globally distributed invasive ant that is largely restricted to disturbed habitats in its introduced range. For more than half a century, biologists have believed its success results from superior competitive abilities relative to native ant species, ...
... Summary 1. The fire ant, Solenopsis invicta, is a globally distributed invasive ant that is largely restricted to disturbed habitats in its introduced range. For more than half a century, biologists have believed its success results from superior competitive abilities relative to native ant species, ...
(Coleoptera: Tenebrionidae) in the shortgrass steppe
... I then tested 2 alternative hypotheses (B1 and B2, below) regarding the relationships among predation risk, body size, and shrub cover. Although eleodids can produce unpalatable quinones when threatened with predation (Tschinkel 1975a), they are sometimes preyed upon by birds and rodents (Wiens et a ...
... I then tested 2 alternative hypotheses (B1 and B2, below) regarding the relationships among predation risk, body size, and shrub cover. Although eleodids can produce unpalatable quinones when threatened with predation (Tschinkel 1975a), they are sometimes preyed upon by birds and rodents (Wiens et a ...
Species loss and secondary extinctions in simple and complex
... reduced community with S −1 species is permanent this means that the remaining species continue to coexist. If it is not, this means that one or more secondary extinctions will take place. To find the post-extinction community in the second case, we check all the subsets of the S −1 community for a ...
... reduced community with S −1 species is permanent this means that the remaining species continue to coexist. If it is not, this means that one or more secondary extinctions will take place. To find the post-extinction community in the second case, we check all the subsets of the S −1 community for a ...
OBSERVATIONS RELATIVE TO CLAIMS OF DISAPPEARANCE OF
... from an 1895 survey, resulted in a claim that 155 taxa were lost. Hamlin et al. (2012) noted that this paper has been cited widely for its conclusion that many taxa had been lost in the study area. (Primack et al. 2009). In this study Primack and some of his students studied Concord’s flora between ...
... from an 1895 survey, resulted in a claim that 155 taxa were lost. Hamlin et al. (2012) noted that this paper has been cited widely for its conclusion that many taxa had been lost in the study area. (Primack et al. 2009). In this study Primack and some of his students studied Concord’s flora between ...
The Ethics of Reviving Long Extinct Species
... to someone (or something) due to a harm or wrong done to them. However, it is not possible to harm or wrong a species because species do not have aims or welfares distinct from those of the organisms that comprise them. They do not have minds (so lack intentions, desires, or attitudes); they are not ...
... to someone (or something) due to a harm or wrong done to them. However, it is not possible to harm or wrong a species because species do not have aims or welfares distinct from those of the organisms that comprise them. They do not have minds (so lack intentions, desires, or attitudes); they are not ...
CHAPTER 5. THREATS AND EMERGING CONCERNS 5.1
... Although some threats may create minor impacts when acting alone, the cumulative impact or the synergistic effects from multiple threats may lead to dramatic ecological changes (Fischlin et al. 2007) so we have included information in each threat category about expected impacts to species of greates ...
... Although some threats may create minor impacts when acting alone, the cumulative impact or the synergistic effects from multiple threats may lead to dramatic ecological changes (Fischlin et al. 2007) so we have included information in each threat category about expected impacts to species of greates ...
How parasites divide resources: a test of the niche apportionment
... Rohde 1996; Poulin & Valtonen 2001; Gotelli & Rohde 2002). Taken as a whole, these investigations have revealed that departures from random species assembly do occur, but they are the exceptions rather than the norm: most patterns of species co-occurrence are no different from those predicted by nul ...
... Rohde 1996; Poulin & Valtonen 2001; Gotelli & Rohde 2002). Taken as a whole, these investigations have revealed that departures from random species assembly do occur, but they are the exceptions rather than the norm: most patterns of species co-occurrence are no different from those predicted by nul ...
Fouling Community Studies in the Indian River
... spring, when it may have been outcompeted by Schitzoporella. Conopeum is present from early fall to late spring. ...
... spring, when it may have been outcompeted by Schitzoporella. Conopeum is present from early fall to late spring. ...
Extreme life history plasticity and the evolution
... emerging evidence suggests that biotic homogenization is occurring in a variety of ecosystems (Rahel 2000; McKinney 2004; Rooney et al. 2004) with important ecological and evolutionary consequences (Olden et al. 2004). Biological invasions are often closely associated with human environmental impact ...
... emerging evidence suggests that biotic homogenization is occurring in a variety of ecosystems (Rahel 2000; McKinney 2004; Rooney et al. 2004) with important ecological and evolutionary consequences (Olden et al. 2004). Biological invasions are often closely associated with human environmental impact ...
The Ethics of Reviving Long Extinct Species
... to someone (or something) due to a harm or wrong done to them. However, it is not possible to harm or wrong a species because species do not have aims or welfares distinct from those of the organisms that comprise them. They do not have minds (so lack intentions, desires, or attitudes); they are not ...
... to someone (or something) due to a harm or wrong done to them. However, it is not possible to harm or wrong a species because species do not have aims or welfares distinct from those of the organisms that comprise them. They do not have minds (so lack intentions, desires, or attitudes); they are not ...
Some Principles of Conservation Biology, as They Apply
... biology must involve not only biologists, but also geographers, sociologists, economists, philosophers, lawyers, political scientists, educators, artists, and other professionals. A distinguishing feature of conservation biology is that it is mission oriented. 4 Underlying any mission is a set of va ...
... biology must involve not only biologists, but also geographers, sociologists, economists, philosophers, lawyers, political scientists, educators, artists, and other professionals. A distinguishing feature of conservation biology is that it is mission oriented. 4 Underlying any mission is a set of va ...
Reproductive Isolation among Acropora Species
... be capable of interbreeding (reviewed in Willis et al. 2006). Although hybridization has received a great deal of attention as a potential mechanism for speciation in Acropora, there is evidence to suggest that hybridization in nature is less common than in vitro. For example, fine-scale temporal di ...
... be capable of interbreeding (reviewed in Willis et al. 2006). Although hybridization has received a great deal of attention as a potential mechanism for speciation in Acropora, there is evidence to suggest that hybridization in nature is less common than in vitro. For example, fine-scale temporal di ...
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.