Jornada Basin LTER Research

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Dataset: Ant nest soil organic matter

   File description including attribute definitions: data_JornadaStudy_368_ant_nest_organic_matter
   Original Investigator: Rodolfo R Di Marco
   Data contact: John Anderson
   Duration: 1987 - 1987
   Dataset ID: 210368003
   DOI: 10.6073/pasta/48af5c409d729d6426b82818d8606dd5

The purpose of this investigation was to answer three general questions: 1. How does the modification of soil properties and the ratios of resources (e.g., water-N) by ants alter species assemblages of winter annual plants at the edge of the ant nests? 2. How does the "spring cleaning", clipping, predation or herbivory by ants affect success of the winter annual plants at the edge of ant nests? 3. Are there significant differences in the floristic assemblage and belowground standing crop (root biomass) between the edge of ant nest and the surrounding unaffected soils? Data set contains % organic matter of soils sampled in January 1987 from ant nests and adjacent reference sites.

   Additional information:

This study was conducted at three sites on the Jornada LTER during winter-spring 1987. A burrograss-tobosa swale grassland was site 1, an area dominated by the perennial grasses Scleropogon brevifolia (burrograss) and Hilaria mutica (tobosa). This area is located 3,000 ft. (1,000 m) SE of the playa bottom or playa basin (College Playa) and subject to rare sheet flooding. A playa fringe (College Playa) was site 2, an area characterized by scattered Prosopis glandulosa (mesquite) mixed with Yucca elata and Larrea tridentata (creosotebush). The upper basin slope was site 3, an area characterized by a fairly uniform cover of Xanthocephalum sarothrae (snakeweed) and a high diversity of annual forbs and grasses. The soil series described on the watershed by Wierenga et al. (1987) from site 1 to site 3 are Dalby (Typic Torrerts, fine), Headquarter (Ustollic Haplargid, fine loamy), Bucklebar (Typic Haplargid, fine-loamy), and Dona Ana (Typic Haplargid, coarse-loamy), respectively.


field data sheets


In January 1987, organic matter was determined by total combustion in an electric muffle furnace at 600 C for 8 hours using the same soil samples as used for water content measurements.



   Quality Assurance

. The raw data which composes this data set was extracted from provided SAS files prior to analyses.