Long-term population monitoring of Davis' peppergrass (Lepidiuim davisii) on the Mountain Home Air Force Base: establishment of monitoring plots and first-year results

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Abstract:

Lepidium davisii (Davis' peppergrass) is a regional endemic restricted mainly to Ada, Elmore, and Owyhee counties, Idaho, and small parts of Twin Falls County, Idaho, and Malheur County, Oregon. In addition to a narrow distribution, it is also restricted to a very narrow set of habitat conditions: flat, hard floors of dry lake beds known as vernal pools or playas. These small, isolated habitats are subjected to numerous and varied disturbances. For these reasons it is a category 2 candidate for federal listing. <br> Recent rare plant surveys of the Mountain Home Air Force Base revealed the presence of three populations of Davis's peppergrass on the Small Arms Range. The emphasis of this study is to help meet monitoring requirements for any future pre-listing Conservation Agreement between the Air Force and the U.S. Fish and Wildlife Service. A demographic monitoring program will provide pertinent population data to develop a habitat management plan. During June and July, 1991, six permanent monitoring transects were established in the Davis' peppergrass population on the Small Arms Range. A total of 832 Davis' peppergrass plants were mapped in six transects. Selected density and fecundity data are presented.

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Reference Code: U91BER02IDUS <br>

Full Citation: Bernatas, S., and R. K. Moseley. 1991. Long-term population monitoring of Davis' peppergrass (Lepidiuim davisii) on the Mountain Home Air Force Base: establishment of monitoring plots and first-year results. Conservation Data Center, Idaho Department of Fish and Game, Boise, Idaho. 9 pp. plus appendices <br>

Location: PLANT ELEMENT FILE {Lepidiuim davisii}; ELECTRONIC FILE - BOTANY: PLANT SPECIES: {Lepidiuim davisii} <br>