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Title: Preserving biodiversity under current and future climates: a case study

Author: Coulston, John W.; Riitters, Kurt H.

Date: 2005

Source: Global Ecology and Biogeography, (Global Ecol. Biogeogr.) (2005) 14, 31­38

Publication Series: Miscellaneous Publication

Description:

Aim The conservation of biological and genetic diversity is a major goal of reserve systems at local, regional, and national levels. The International Union for the Conservation of Nature and Natural Resources suggests a 12% threshold (area basis) for adequate protection of biological and genetic diversity of a plant community. However, thresholds based on area may protect only a small portion of the total diversity if the locations are chosen without regard to the variation within the community. The objectives of this study were to demonstrate methods to apply a coarse-filter approach for identify ing gaps in the current reserve system of the Psuedotsuga menziesii (Douglas-fir) forest type group based on current climatic conditions and a global climate change scenario.

Location Western United States.

Method We used an ecological envelope approach that was based on seven biocli matic factors, two topographic factors, and two edaphic factors. Multivariate factor analysis was then used to reduce the envelope to two dimensions. The relative density of habitat and protected areas were identified in each part of the envelope based on the current climate and potential future climate. We used this information to identify gaps in the reserve system.

Results Although the protected areas occurred in all parts of the envelope, most existed in colder and drier areas. This was true for both the current climate and potential future climate.

Main conclusion To protect more of the ecological envelope, future conservation efforts would be most effective in western Oregon, north-western Washington, and north-western California.

Keywords: Coarse-filter, conservation, Douglas-fir communities, ecological envelope, factor analysis, global climate change, North America, Pseudotsuga menziesii

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Citation:


Coulston, John W.; Riitters, Kurt H. 2005. Preserving biodiversity under current and future climates: a case study. Global Ecology and Biogeography, (Global Ecol. Biogeogr.) (2005) 14, 31­38

 


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