Distribution of the endangered giant kangaroo rat, Dipodomys ingens, on the Naval Petroleum Reserves, California

BioRxiv : the Preprint Server for Biology
Thomas P. O'FarrellMary S. Kelly


ABSTRACT. Burrows of the endangered giant kangaroo rat, Dipodomys ingens, were found on the U.S. Department of Energy′s Naval Petroleum Reserves in Kern County, California. The majority of burrows (63%) were found in areas of low relief (4.3 ±0.5°, n=32) on valley floors but 28% were unexpectedly found on low relief areas (6.4 ±0.8°, n=39) in the uplands. Burrows were not distributed in proportion to the areal extend of the soil series, but were concentrated in deep alluvial sandy loams. Well pads were the most frequently observed (73% of 211) human disturbance in the vicinity of burrows, but they were the most distant (150 ±61 m, n=150). Dirt roads were observed closer to burrows (50 ±10 m, n=28) but less frequently (4%). Only 8 burrows were found in the vicinity of proposed petroleum developments but no projects had to be modified to avoid negatively affecting the species.

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