Surface Soil Microarthropods - 1988 and 1989

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Soil samples were collected from mesquite dune site, and analyzed for nutrient content in the plant, N-mineralization potential, rhizobium counts, and microarthropods counts.

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Field and electronic data sheets

Five mesquite dunes were irrigated by pumping water from storage tank located 200 m from the site. Water was applied to the dunes with an overhead sprinkler (later replaced by a drip irrigation system to minimize wind drift) located at the apex of each dune. Irrigation began in March with approximately 2.5 cm applied 2-3 times/week for 6 weeks to initially wet the dry soil. Thereafter high water availability was maintained by weekly irrigation. Five nonirrigated dunes served as control. Soil samples were collected (hand augered) under mesquite (Prosopis glandulosa) trees at sand dune site on the Jornada LTER site to three depths, 0-50 and 50-100, and 100-150cm. Soil samples were placed in plastic bags, tied, and stored in portable coolers. These samples were later divided into subsamples for microarthropod investigations. Microarthropods were extracted in modified Tullgren funnels into water (Santos et al. 1981), then counted and identified to species and placed into trophic groups (Christiansen 1964, Krantz 1978, Walter 1987).

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Soil cores were collected under mesquite (Prosopis glandulosa) trees at the dune site on the Jornada LTER site located in the northern Chihuahuan Desert near Las Cruces, New Mexico. Precipitation is 230mm/yr, with half occurring during the summer. The vegetation is coppice mesquite dunes (30% cover) with scattered shrubs of saltbush and snakeweed.


7 sampling dates

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