Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1371/journal.pone.0066103 |
Factors Controlling Soil Microbial Biomass and Bacterial Diversity and Community Composition in a Cold Desert Ecosystem: Role of Geographic Scale | |
Van Horn, David J.1; Van Horn, M. Lee2; Barrett, John E.3; Gooseff, Michael N.4; Altrichter, Adam E.3; Geyer, Kevin M.3; Zeglin, Lydia H.5; Takacs-Vesbach, Cristina D.1 | |
通讯作者 | Takacs-Vesbach, Cristina D. |
来源期刊 | PLOS ONE
![]() |
ISSN | 1932-6203 |
出版年 | 2013 |
卷号 | 8期号:6 |
英文摘要 | Understanding controls over the distribution of soil bacteria is a fundamental step toward describing soil ecosystems, understanding their functional capabilities, and predicting their responses to environmental change. This study investigated the controls on the biomass, species richness, and community structure and composition of soil bacterial communities in the McMurdo Dry Valleys, Antarctica, at local and regional scales. The goals of the study were to describe the relationships between abiotic characteristics and soil bacteria in this unique, microbially dominated environment, and to test the scale dependence of these relationships in a low complexity ecosystem. Samples were collected from dry mineral soils associated with snow patches, which are a significant source of water in this desert environment, at six sites located in the major basins of the Taylor and Wright Valleys. Samples were analyzed for a suite of characteristics including soil moisture, pH, electrical conductivity, soil organic matter, major nutrients and ions, microbial biomass, 16 S rRNA gene richness, and bacterial community structure and composition. Snow patches created local biogeochemical gradients while inter-basin comparisons encompassed landscape scale gradients enabling comparisons of microbial controls at two distinct spatial scales. At the organic carbon rich, mesic, low elevation sites Acidobacteria and Actinobacteria were prevalent, while Firmicutes and Proteobacteria were dominant at the high elevation, low moisture and biomass sites. Microbial parameters were significantly related with soil water content and edaphic characteristics including soil pH, organic matter, and sulfate. However, the magnitude and even the direction of these relationships varied across basins and the application of mixed effects models revealed evidence of significant contextual effects at local and regional scales. The results highlight the importance of the geographic scale of sampling when determining the controls on soil microbial community characteristics. |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000320576400053 |
WOS关键词 | MCMURDO DRY VALLEYS ; WRIGHT VALLEY ; TAYLOR VALLEY ; FUNGAL COMMUNITIES ; GLOBAL PATTERNS ; VICTORIA LAND ; BIODIVERSITY ; CLASSIFICATION ; BIOGEOCHEMISTRY ; GEOMORPHOLOGY |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/179376 |
作者单位 | 1.Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA; 2.Univ S Carolina, Dept Psychol, Columbia, SC 29208 USA; 3.Virginia Technol Inst, Dept Biol Sci, Blacksburg, VA USA; 4.Penn State Univ, Dept Civil & Environm Engn, University Pk, PA 16802 USA; 5.Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA |
推荐引用方式 GB/T 7714 | Van Horn, David J.,Van Horn, M. Lee,Barrett, John E.,et al. Factors Controlling Soil Microbial Biomass and Bacterial Diversity and Community Composition in a Cold Desert Ecosystem: Role of Geographic Scale[J],2013,8(6). |
APA | Van Horn, David J..,Van Horn, M. Lee.,Barrett, John E..,Gooseff, Michael N..,Altrichter, Adam E..,...&Takacs-Vesbach, Cristina D..(2013).Factors Controlling Soil Microbial Biomass and Bacterial Diversity and Community Composition in a Cold Desert Ecosystem: Role of Geographic Scale.PLOS ONE,8(6). |
MLA | Van Horn, David J.,et al."Factors Controlling Soil Microbial Biomass and Bacterial Diversity and Community Composition in a Cold Desert Ecosystem: Role of Geographic Scale".PLOS ONE 8.6(2013). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。