Identifying unprotected and potentially at risk plant communities in the western USA

Abstract We analyzed the conservation status of 73 vegetation cover types distributed across a 1.76 million km2 region in 10 states of the western USA. We found that 25 vegetation cover types had at least 10% of their area in nature reserves. These were generally plant communities located at higher elevations and thus more commonly associated with national parks and wilderness areas. All but three of the remaining 48 cover types occurred with sufficient area on publically owned lands in the region to imply that transforming land management intent on these lands could also increase their protection. We also analyzed the level of protection afforded each cover type across its entire geographic distribution in the region. Most cover types that were at least minimally protected in total across the region were also at least minimally protected in most areas of their occurrence. Our results show that there is a realistic opportunity to design a system of biodiversity reserves in this region that represent the full range of environmental conditions in which the various plant communities occur. Conducting this type of broad-scale analysis is a necessary first step in that process and provides a database for others to work from.

[1]  Stephen W. Hodge,et al.  A Preliminary Assessment of the Status of Major Terrestrial and Wetland Ecosystems on Federal and Indian Lands in the United States , 1988 .

[2]  R. Healy,et al.  The Lands Nobody Wanted , 1977 .

[3]  C. C. Adams.  THE POSTGLACIAL DISPERSAL OF THE NORTH AMERICAN BIOTA , 1905 .

[4]  R L Pressey,et al.  Beyond opportunism: Key principles for systematic reserve selection. , 1993, Trends in ecology & evolution.

[5]  David M. Stoms,et al.  Gap analysis of the vegetation of the Intermountain Semi-Desert ecoregion , 1998 .

[6]  C. Margules,et al.  Introduction to some Australian developments in conservation evaluation , 1989 .

[7]  R. Dasmann.  Towards a system for classifying natural regions of the world and their representation by national parks and reserves , 1972 .

[8]  C. Groves,et al.  Owning Up to Our Responsibilities: Who Owns Lands Important for Biodiversity? , 2000 .

[9]  G. Brundtland,et al.  Our common future , 1987 .

[10]  M. Shaffer,et al.  Biogeography of the Megazoo , 1975, Science.

[11]  K. Mcallister,et al.  Using current protection status to assess conservation priorities , 2001 .

[12]  M. Soulé,et al.  ECOLOGY: Conservation Targets: Do They Help? , 1998, Science.

[13]  Hugh P. Possingham,et al.  Optimality in reserve selection algorithms: When does it matter and how much? , 1996 .

[14]  Jonathan S. Adams,et al.  Precious heritage : the status of biodiversity in the United States , 2000 .

[15]  R. G. Wright,et al.  Ecoregions as a level of ecological analysis , 1998 .

[16]  R. G. Wright,et al.  National Parks and Protected Areas: Their Role in Environmental Protection , 1996 .

[17]  Pieter A. Zuidema,et al.  Forest fragmentation and biodiversity: the case for intermediate-sized conservation areas , 1996, Environmental Conservation.

[18]  J. Franklin.  Preserving Biodiversity: Species, Ecosystems, or Landscapes? , 1993, Ecological applications : a publication of the Ecological Society of America.

[19]  R. G. Wright,et al.  GAP ANALYSIS: A GEOGRAPHIC APPROACH TO PROTECTION OF BIOLOGICAL DIVERSITY , 1993 .

[20]  R. G. Wright,et al.  NATURE RESERVES: DO THEY CAPTURE THE FULL RANGE OF AMERICA'S BIOLOGICAL DIVERSITY? , 2001 .

[21]  Paul A. Keddy,et al.  North American Terrestrial Vegetation , 1988 .

[22]  B. Csuti,et al.  A Gap Analysis of the Management Status of the Vegetation of Idaho (U.S.A.) , 1995 .