Biogeographical patterns of soil molecular microbial biomass as influenced by soil characteristics and management
Biogeographical patterns of soil molecular microbial biomass as influenced by soil characteristics and management
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DOI：
10.1111/j.1466-8238.2010.00628.x
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发表时间：
2011-07-01
影响因子：
6.4
通讯作者：
Ranjard, L.
中科院分区：
文献类型：
--
作者：
Dequiedt, S.;Saby, N. P. A.;Ranjard, L.
土壤微生物群落在大尺度上的空间结构及其分布的环境因子的识别研究较少。本研究的总体目标是确定在很大程度上的土壤中的微生物生物量的空间格局和排名的环境过滤器最影响这种distribution.LocationFrench领土使用法国土壤质量监测网络。该网络覆盖了整个法国领土和土壤采样在2150个站点沿着一个系统grid.MethodsThe土壤DNA提取从所有这些土壤中表达的土壤分子微生物生物量和相关的其他土壤和土地-结果本研究提供了第一个广泛的微生物生物量地图，并揭示了这种生物量在尺度上的异质性和空间结构分布在法国驱动生物量分布的主要因素是土壤的物理化学性质（质地、pH值和总有机碳）以及土地利用。用于集约农业的土地，特别是单一栽培和葡萄园的土壤，表现出最小的生物量池。有趣的是，已知的影响大规模分布的macroorganisms，如气候因素的因素，没有被确定为微生物community.Main conclusionsMicrobial丰度的重要驱动程序是空间结构和依赖于当地的过滤器，如土壤特性和土地利用，但相对独立的全球过滤器，如气候因素或自然屏障的存在。我们的研究证实，微生物的生态地理学从根本上不同于“大型生物”的生态地理学，土壤管理可以产生显着的大规模影响。
AimThe spatial organization of soil microbial communities on large scales and the identification of environmental factors structuring their distribution have been little investigated. The overall objective of this study was to determine the spatial patterning of microbial biomass in soils over a wide extent and to rank the environmental filters most influencing this distribution.LocationFrench territory using the French Soil Quality Monitoring Network. This network covers the entire French territory and soils were sampled at 2150 sites along a systematic grid.MethodsThe soil DNA extracted from all these soils was expressed in terms of soil molecular microbial biomass and related to other soil and land-use data over French territory.ResultsThis study provides the first extensive map of microbial biomass and reveals the heterogeneous and spatially structured distribution of this biomass on the scale of France. The main factors driving biomass distribution are the physico-chemical properties of the soil (texture, pH and total organic carbon) as well as land use. Soils from land used for intensive agriculture, especially monoculture and vineyards, exhibited the smallest biomass pools. Interestingly, factors known to influence the large-scale distribution of macroorganisms, such as climatic factors, were not identified as important drivers for microbial communities.Main conclusionsMicrobial abundance is spatially structured and dependent on local filters such as soil characteristics and land use but is relatively independent of global filters such as climatic factors or the presence of natural barriers. Our study confirms that the biogeography of microorganisms differs fundamentally from the biogeography of 'macroorganisms' and that soil management can have significant large-scale effects.