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Publication Type J
Authors Barness, G., S. Zaragoza, I. Shmueli and Y. Steinberger
Title Vertical Distribution of a Soil Microbial Community as Affected by Plant Ecophysiological Adaptation in a Desert System
Source Microbial Ecology
Author Keywords biomass carbon negev desert canopy population ecosystem nitrogen halophytes respiration dynamics patterns
Abstract The spatial and temporal patterns of resource distribution in a desert system have been shown to influence a number of soil biota components and processes. The pattern of possible different resources supplied by two typical halophyte shrubs with different ecophysiological adaptations, Atriplex halimus and Hammada scoparia, was found to be the trigger in the present study on the microbial community temporal and spatial (vertical) scale. The uniqueness of A. halimus, a saltbush plant, is in the creation of 'islands of salinity' in its rhizosphere system and the relatively high percentage of organic matter beneath its canopy, whereas the H. scoparia shrub has a leafless stem with a relatively lower amount of organic matter accumulation beneath its canopy. Soil samples from 0 to 50 cm depths were collected at 10-cm intervals during each of the four seasons. The vertical distribution of the microbial community was measured in the vicinity of the above plant shrubs and in the open spaces between them. The results obtained from the field study demonstrated that plant ecophysiological adaptation played an important role in the temporal and spatial distribution of abiotic conditions and microbial community levels such as microbial biomass, CO(2) evolution, and colony-forming units (CFUs) of both bacteria and fungi. However, we did not find consistency in the positive effect of plant cover on the microbial community. The shrub effect was observed to have a major outcome on microbial variables not only on a temporal but also on a spatial (vertical) basis. This contributed to the understanding of the controversy regarding the difference between the shrubs.
Author Address [Barness, G.; Shmueli, I.; Steinberger, Y.] Bar Ilan Univ, Mina & Everard Goodman Fac Life Sci, IL-52900 Ramat Gan, Israel. [Rodriguez Zaragoza, S.] Univ Nacl Autonoma Mexico, Fac Estudios Super Iztacala, Microbiol Lab, Unidad Biol Tecnolodia & Prototipos, Mexico City, DF, Mexico. Steinberger, Y (reprint author), Bar Ilan Univ, Mina & Everard Goodman Fac Life Sci, IL-52900 Ramat Gan, Israel. steinby@mail.biu.ac.il
ISSN 0095-3628
ISBN 0095-3628
29-Character Source Abbreviation Microb. Ecol.
Publication Date Jan
Year Published 2009
Volume 57
Issue 1
Beginning Page 36-49
Digital Object Identifier (DOI) 10.1007/s00248-008-9396-5
Unique Article Identifier WOS:000261953300005
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