干旱区生态环境知识资源中心(Arid): Unimodal productivity-diversity relationships among bacterial communities in a simple polar soil ecosystem

Arid

DOI	10.1111/1462-2920.14639
	Unimodal productivity-diversity relationships among bacterial communities in a simple polar soil ecosystem
	Geyer, Kevin M.1,2; Barrett, John E.2
通讯作者	Geyer, Kevin M.
来源期刊	ENVIRONMENTAL MICROBIOLOGY
ISSN	1462-2912
EISSN	1462-2920
出版年	2019
卷号	21 期号:7 页码:2523-2532
英文摘要	Unlike other macroecological principles, relationships between productivity and diversity have not been effectively tested for microbial communities. Here we describe an experiment in which the availability of resources to soil bacterial communities was manipulated in a model system, the McMurdo Dry Valleys of Antarctica. Mannitol additions were used to simulate a productivity gradient such that a response in bacterial biomass production, taxonomic diversity and functioning (e.g., enzyme activity) were induced. Resource amendment induced a positive linear response in microbial productivity (P < 0.001) but a unimodal (hump-shaped) response in microbial diversity at multiple taxonomic scales (P = 0.035). Putative oligotrophic (e.g., phyla Nitrospirae and Cyanobacteria) and copiotrophic (e.g., phylum Proteobacteria) taxa were apparent through substantial community turnover along the resource gradient. Soil enzyme activity was inversely related to bacterial biomass but positively related to diversity, suggesting the latter may be a stronger control over enzyme-mediated decomposition. The mechanisms behind this pattern are consistent with macroecological theory of a shift from environmental (e.g., stress tolerance) to biotic (e.g., competition) drivers with increasing resource availability. This evidence is among the first of its kind to document a significant unimodal productivity-diversity relationship for soil bacteria.
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000474294900023
WOS关键词	MICROBIAL DIVERSITY ; SPECIES RICHNESS ; ORGANIC-CARBON ; TAYLOR VALLEY ; VICTORIA LAND ; DESERT ; BIODIVERSITY ; BIOGEOCHEMISTRY ; CLASSIFICATION ; SEQUENCES
WOS类目	Microbiology
WOS研究方向	Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215455
作者单位	1.Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA; 2.Virginia Polytech Inst & State Univ, Dept Biol Sci, Blacksburg, VA 24061 USA
推荐引用方式 GB/T 7714	Geyer, Kevin M.,Barrett, John E.. Unimodal productivity-diversity relationships among bacterial communities in a simple polar soil ecosystem[J],2019,21(7):2523-2532.
APA	Geyer, Kevin M.,&Barrett, John E..(2019).Unimodal productivity-diversity relationships among bacterial communities in a simple polar soil ecosystem.ENVIRONMENTAL MICROBIOLOGY,21(7),2523-2532.
MLA	Geyer, Kevin M.,et al."Unimodal productivity-diversity relationships among bacterial communities in a simple polar soil ecosystem".ENVIRONMENTAL MICROBIOLOGY 21.7(2019):2523-2532.