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Soil Microbial Fingerprints, Carbon, and Nitrogen in a Mojave Desert Creosote-Bush Ecosystem

^a Ecosystem Science Division, ESPM, Univ. of California, Berkeley, CA 94720
^b Soil Science Graduate Group, Land, Air and Water Resources, One Shields Ave., Univ. of California, Davis, CA 95616
^c Geosciences Dep., The Pennsylvania State Univ., University Park, PA 16802
^d Geography Dep., Univ. of California, Santa Barbara, CA 93106
^e Soil Science Graduate Group, Land, Air and Water Resources, One Shields Ave., Univ. of California, Davis, CA 95616

View larger version (19K): [in this window] [in a new window]   Fig. 1. (a) Redundancy analysis of polar lipid fatty acid (PLFA) abundance from transects away from four shrubs (a, b, c, d). Distance from the shrub main stem is shown as 0, 1, 2, or 3. Each point represents three replicate PLFA analyses. Ellipses identify samples collected at equal distances from shrubs. (b) Redundancy analysis for PLFA variables. Fatty acids that lie close to samples in plot (a) above if plot origins were superimposed would probably have a high relative abundance in those samples.

View larger version (6K): [in this window] [in a new window]   Fig. 2. Dependence of 15N on N concentration at 3 m from shrubs, the only location where the relationship was significant (P = 0.01).