The Linkage Design for the Joshua Tree - Twentynine Palms Connection encompasses basin
and range topography with an impressive array of geological formations and broad
alluvial fans or bajadas. It includes several major swaths of habitat to accommodate
diverse species and ecosystem functions. The two areas targeted to be served by
the linkage, Joshua Tree National Park and the Marine Corps Air Ground Combat Center
(MCAGCC) at Twentynine Palms, support a great diversity of species. Joshua Tree
provides habitat for more than 250 resident and migratory birds, 52 mammals, 44
reptiles, 3 amphibians, and more than 700 vascular plant species (
http://www.nps.gov/jotr),
while MCAGCC supports nearly 400 plant species and more than 250 vertebrate wildlife
species (MGAGCC 2002;
http://www.29palms.usmc.mil/).
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