干旱区生态环境知识资源中心(Arid): The distribution and relative ecological roles of autotrophic and heterotrophic diazotrophs in the McMurdo Dry Valleys, Antarctica

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DOI	10.1093/femsec/fiaa010
	The distribution and relative ecological roles of autotrophic and heterotrophic diazotrophs in the McMurdo Dry Valleys, Antarctica
	Coyne, Kathryn J.1; Parker, Alexander E.2; Lee, Charles K.3; Sohm, Jill A.4,5; Kalmbach, Andrew 2; Gunderson, Troy 6; Leon-Zayas, Rosa 6; Capone, Douglas G.6; Carpenter, Edward J.2; Cary, S. Craig 1,3
通讯作者	Cary, S. Craig
来源期刊	FEMS MICROBIOLOGY ECOLOGY
ISSN	0168-6496
EISSN	1574-6941
出版年	2020
卷号	96 期号:3
英文摘要	The McMurdo Dry Valleys (MDV) in Antarctica harbor a diverse assemblage of mat-forming diazotrophic cyanobacteria that play a key role in nitrogen cycling. Prior research showed that heterotrophic diazotrophs also make a substantial contribution to nitrogen fixation in MDV. The goals of this study were to survey autotrophic and heterotrophic diazotrophs across the MDV to investigate factors that regulate the distribution and relative ecological roles of each group. Results indicated that diazotrophs were present only in samples with mats, suggesting a metabolic coupling between autotrophic and heterotrophic diazotrophs. Analysis of 16S rRNA and nifH gene sequences also showed that diazotrophs were significantly correlated to the broader bacterial community, while co-occurrence network analysis revealed potential interspecific interactions. Consistent with previous studies, heterotrophic diazotrophs in MDV were diverse, but largely limited to lakes and their outlet streams, or other environments protected from desiccation. Despite the limited distribution, heterotrophic diazotrophs may make a substantial contribution to the nitrogen budget of MDV due to larger surface area and longer residence times of lakes. This work contributes to our understanding of key drivers of bacterial community structure in polar deserts and informs future efforts to investigate the contribution of nitrogen fixation to MDV ecosystems.
英文关键词	McMurdo Dry Valleys Antarctica co-occurrence network cyanobacteria heterotrophic diazotrophy
类型	Article
语种	英语
国家	USA ; New Zealand
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000526682400014
WOS关键词	COOCCURRENCE PATTERNS ; POLAR DESERT ; CYANOBACTERIAL EXOPOLYSACCHARIDES ; COMMUNITY COMPOSITION ; NITROGEN-FIXATION ; GENE DIVERSITY ; MICROBIAL MATS ; ORGANIC-CARBON ; SOIL CRUSTS ; NIFH GENES
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/2XILL650/314504
作者单位	1.Univ Delaware, Coll Earth Ocean & Environm, Lewes, DE 19958 USA; 2.San Francisco State Univ, Estuary & Ocean Sci Ctr, Tiburon, CA 94920 USA; 3.Univ Waikato, Sch Sci, Int Ctr Terr Antarct Res, Hamilton 3240, New Zealand; 4.Univ Southern Calif, Wrigley Inst Environm Studies, Los Angeles, CA 90080 USA; 5.Univ Southern Calif, Dept Biol Sci, Los Angeles, CA 90080 USA; 6.Willamette Univ, Dept Biol, Salem, OR 97301 USA
推荐引用方式 GB/T 7714	Coyne, Kathryn J.,Parker, Alexander E.,Lee, Charles K.,et al. The distribution and relative ecological roles of autotrophic and heterotrophic diazotrophs in the McMurdo Dry Valleys, Antarctica[J],2020,96(3).
APA	Coyne, Kathryn J..,Parker, Alexander E..,Lee, Charles K..,Sohm, Jill A..,Kalmbach, Andrew.,...&Cary, S. Craig.(2020).The distribution and relative ecological roles of autotrophic and heterotrophic diazotrophs in the McMurdo Dry Valleys, Antarctica.FEMS MICROBIOLOGY ECOLOGY,96(3).
MLA	Coyne, Kathryn J.,et al."The distribution and relative ecological roles of autotrophic and heterotrophic diazotrophs in the McMurdo Dry Valleys, Antarctica".FEMS MICROBIOLOGY ECOLOGY 96.3(2020).