contrasting diversity patterns of crenarchaeal, bacterial and fungal soil communities in an alpine landscape对比crenarchaeal模式的多样性,在一个高山土壤细菌和真菌群落景观.pdf

Contrasting Diversity Patterns of Crenarchaeal, Bacterial and Fungal Soil Communities in an Alpine Landscape 1 ¤ 1 1 1 1,2 Lucie Zinger * , David P. H. Lejon , Florence Baptist , Abderrahim Bouasria , Serge Aubert , Roberto A. Geremia1, Philippe Choler1,2 ´ ´ 1 Laboratoire d’Ecologie Alpine, CNRS-UMR 5553, Universite de Grenoble, Grenoble, France, 2 Station Alpine J. Fourier, CNRS-UMS 3370, Universite de Grenoble, Grenoble, France Abstract Background: The advent of molecular techniques in microbial ecology has aroused interest in gaining an understanding about the spatial distribution of regional pools of soil microbes and the main drivers responsible of these spatial patterns. Here, we assessed the distribution of crenarcheal, bacterial and fungal communities in an alpine landscape displaying high turnover in plant species over short distances. Our aim is to determine the relative contribution of plant species composition, environmental conditions, and geographic isolation on microbial community distribution. Methodology/Principal Findings: Eleven types of habitats that best represent the landscape heterogeneity were investigated. Crenarchaeal, bacterial and fungal communities were described by means of Single Strand Conformation Polymorphism. Relationships between microbial beta diversity patterns were examined by using Bray-Curtis dissimilarities and Principal Coordinate Analyses. Distance-based redundancy analyses and variation partitioning were used to estimate the rel