| Microbial Functional Diversity Associated with Plant Litter Decomposition Along a Climatic Gradient. | |
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MedLine Citation:
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PMID: 22430507 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Predicted changes in climate associated with increased greenhouse gas emissions can cause increases in global mean temperature and changes in precipitation regimes. These changes may affect key soil processes, e.g., microbial CO(2) evolution and biomass, mineralization rates, primary productivity, biodiversity, and litter decomposition, which play an important role in carbon and nutrient cycling in terrestrial ecosystems. Our study examined the changes in litter microbial communities and decomposition along a climatic gradient, ranging from arid desert to humid Mediterranean regions in Israel. Wheat straw litter bags were placed in arid, semi-arid, Mediterranean, and humid Mediterranean sites. Samples were collected seasonally over a 2-year period in order to evaluate mass loss, litter moisture, C/N ratio, bacterial colony-forming units (CFUs), microbial CO(2) evolution and biomass, microbial functional diversity, and catabolic profile. Decomposition rate was the highest during the first year of the study at the Mediterranean and arid sites. Community-level physiological profile and microbial biomass were the highest in summer, while bacterial CFUs were the highest in winter. Microbial functional diversity was found to be highest at the humid Mediterranean site, whereas substrate utilization increased at the arid site. Our results support the assumption that climatic factors control litter degradation and regulate microbial activity. |
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Authors:
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Chen Sherman; Yosef Steinberger |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-3-21 |
Journal Detail:
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Title: Microbial ecology Volume: - ISSN: 1432-184X ISO Abbreviation: - Publication Date: 2012 Mar |
Date Detail:
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Created Date: 2012-3-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7500663 Medline TA: Microb Ecol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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