瓜伊马斯盆地海底沉积古基因组反映了复杂的环境历史。
The Guaymas Basin Subseafloor Sedimentary Archaeome Reflects Complex Environmental Histories.
作者信息
Ramírez Gustavo A, McKay Luke J, Fields Matthew W, Buckley Andrew, Mortera Carlos, Hensen Christian, Ravelo Ana Christina, Teske Andreas P
机构信息
Department of Marine Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
College of Veterinary Medicine, Western University of Health Sciences, Pomona, CA, USA.
出版信息
iScience. 2020 Aug 15;23(9):101459. doi: 10.1016/j.isci.2020.101459. eCollection 2020 Sep 25.
We explore archaeal distributions in sedimentary subseafloor habitats of Guaymas Basin and the adjacent Sonora Margin, located in the Gulf of California, México. Sampling locations include (1) control sediments without hydrothermal or seep influence, (2) Sonora Margin sediments underlying oxygen minimum zone water, (3) compacted, highly reduced sediments from a pressure ridge with numerous seeps at the base of the Sonora Margin, and (4) sediments impacted by hydrothermal circulation at the off-axis Ringvent site. Generally, archaeal communities largely comprise Bathyarchaeal lineages, members of the Hadesarchaea, MBG-D, TMEG, and ANME-1 groups. Variations in archaeal community composition reflect locally specific environmental challenges. Background sediments are divided into surface and subsurface niches. Overall, the environmental setting and history of a particular site, not isolated biogeochemical properties out of context, control the subseafloor archaeal communities in Guaymas Basin and Sonora Margin sediments.
我们探究了位于墨西哥加利福尼亚湾的瓜伊马斯盆地及相邻的索诺拉边缘沉积性海底以下生境中的古菌分布情况。采样地点包括：（1）不受热液或渗漏影响的对照沉积物；（2）索诺拉边缘位于氧含量最低区域水体之下的沉积物；（3）来自索诺拉边缘底部有众多渗漏点的压力脊处压实的、高度还原的沉积物；（4）轴外环形喷口处受热液循环影响的沉积物。总体而言，古菌群落主要由深古菌谱系、冥古菌、MBG-D、TMEG和ANME-1组的成员组成。古菌群落组成的变化反映了当地特定的环境挑战。背景沉积物分为表层和次表层生态位。总的来说，特定地点的环境背景和历史，而非脱离背景的孤立生物地球化学特性，控制着瓜伊马斯盆地和索诺拉边缘沉积物中的海底古菌群落。
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