期刊
FEMS MICROBIOLOGY ECOLOGY
卷 96, 期 2, 页码 -出版社
OXFORD UNIV PRESS
DOI: 10.1093/femsec/fiz207
关键词
Antarctica; microbial mat; energy; Lake Fryxell; Oxygen; Photosynthetically Active Radiation
类别
资金
- National Science Foundation Division of Polar Programs through the McMurdo Long Term Ecological Research project [OPP-115245, OPP-1637708]
- NASA Astrobiology [NN13AI60G]
Ecological communities are regulated by the flow of energy through environments. Energy flow is typically limited by access to photosynthetically active radiation (PAR) and oxygen concentration (O-2). The microbial mats growing on the bottom of Lake Fryxell, Antarctica, have well-defined environmental gradients in PAR and (O-2). We analyzed the metagenomes of layers from these microbial mats to test the extent to which access to oxygen and light controls community structure. We found variation in the diversity and relative abundances of Archaea, Bacteria and Eukaryotes across three (O-2) and PAR conditions: high (O-2) and maximum PAR, variable (O-2) with lower maximum PAR, and low (O-2) and maximum PAR. We found distinct communities structured by the optimization of energy use on a millimeter-scale across these conditions. In mat layers where (O-2) was saturated, PAR structured the community. In contrast, (O-2) positively correlated with diversity and affected the distribution of dominant populations across the three habitats, suggesting that meter-scale diversity is structured by energy availability. Microbial communities changed across covarying gradients of PAR and (O-2). The comprehensive metagenomic analysis suggests that the benthic microbial communities in Lake Fryxell are structured by energy flow across both meter- and millimeter-scales.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据