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Download Conservation by Proxy: Indicator, Umbrella, Keystone, by Tim Caro, Sheila Girling Ms. PDF

By Tim Caro, Sheila Girling Ms.

The giant scope of conservation difficulties has pressured biologists and executives to depend on "surrogate" species to function shortcuts to lead their determination making. those species-known through a number of other phrases, together with indicator, umbrella, and flagship species-act as proxies to symbolize greater conservation matters, akin to the positioning of biodiversity hotspots or normal environment health. Synthesizing a big physique of literature, conservation biologist and box researcher Tim Caro bargains systematic definitions of surrogate species recommendations, explores organic theories that underlie them, considers how surrogate species are selected, seriously examines proof for and opposed to their application, and makes concepts for his or her endured use. The bookclarifies terminology and contrasts how varied phrases are utilized in the true worldconsiders the ecological, taxonomic, and political underpinnings of those shortcutsidentifies standards that make for solid surrogate speciesoutlines the situations the place the appliance of the surrogate species thought indicates promiseConservation through Proxy is a benchmark reference that offers transparent definitions and customary figuring out of the facts and thought at the back of surrogate species. it's the first e-book to check and convey jointly literature on greater than fifteen different types of surrogate species, permitting us to evaluate their position in conservation and providing directions on how they are often used such a lot successfully. (20110508)

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Additional resources for Conservation by Proxy: Indicator, Umbrella, Keystone, Flagship, and Other Surrogate Species

Sample text

Thus the ratio of Old World family-to-species richness reveals little about that in Central and South America (Prance 1995). Similarly, centers of neotropical plant species endemism are not reflected at the family level (Prance 1995). Second, the strength of the relationship between higher taxon richness and species richness declines with the number of species found in the higher taxon, so that a survey of orders that would save more time than a survey of genera provides a weaker indication of species richness than does a census of genera (see Figure 2-2).

Common species tend to be recorded first by scientists and they are necessarily less prone to extinction, so less-studied taxa that are just starting to be researched will contain fewer threatened species. Additionally, lessstudied groups will be less well evaluated for threat than well-studied taxa. Thus, the more species recorded in a taxon, the greater the proportion of threatened species will be documented. Similarly, in areas where studies have been more intensive, there should be more species recorded as threatened or extinct (McKinney 1999).

He defined focal species as a “suite of species, each of which is used to define different spatial and compositional attributes that must be present in a landscape and their appropriate management regimes” (Lambeck 1997, 849). Regarding the landscape reconstruction aspect of management, he thought that individuals would be limited by insufficient area to meet their habitat needs, inability to move to suitable habitat patches, and shortage of critical resources. Regarding management of ecosystem processes, he thought that fire, predators, weeds, and livestock might need consideration, at least in an Australian context (see Fig.

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