生物扩散
生物地理学
分类等级
生态学
生物
地理距离
生物多样性
β多样性
空间生态学
比例(比率)
功能群
地理
地图学
分类单元
人口
人口学
社会学
化学
有机化学
聚合物
作者
Qingqing Liang,Heidi K. Mod,Shuaiwei Luo,Binyun Ma,Kena Yang,Beibei Chen,Wei Qi,Zhigang Zhao,Guozhen Du,Antoine Guisan,Xiaojun Ma,Xavier Le Roux
出处
期刊:Authorea - Authorea
日期:2021-12-08
标识
DOI:10.22541/au.163894208.89474268/v1
摘要
The processes governing soil bacteria biogeography are still not fully understood. It remains unknown how the importance of environmental filtering and dispersal differs between bacterial taxonomic and functional biogeography, and whether their importance is scale-dependent. We sampled soils at 195 plots across the Tibet plateau, with distances among plots ranging from 20 m to 1 550 km. Taxonomic composition of bacterial community was characterized by 16S amplicon sequencing, and functional community composition by qPCR targeting 9 functional groups involved in N dynamics. Twelve climatic and soil characteristics were also measured. Both taxonomic and functional dissimilarities were more related to environmental dissimilarity than geographic distance. Taxonomic dissimilarity was mostly explained by soil pH and organic matter, while functional dissimilarity was mostly linked to moisture, temperature and N, P and C availabilities. The roles of environmental filtering and dispersal were, however, scale-dependent and varied between taxonomic and functional dissimilarities, with distance affecting taxonomic dissimilarity over short distances (<~300 km) and functional dissimilarity over long distances (>~600 km). The importance of different environmental predictors varied across scales more for functional than taxonomic dissimilarity. Our results demonstrate how biodiversity dimension (taxonomic versus functional) and spatial scale strongly influence the conclusions derived from bacterial biogeography studies.
科研通智能强力驱动
Strongly Powered by AbleSci AI