Continental-scale niche differentiation of dominant topsoil archaea in drylands,Environmental Microbiology

当前位置： X-MOL 学术 › Environ. Microbiol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Continental-scale niche differentiation of dominant topsoil archaea in drylands
Environmental Microbiology ( IF 4.3 ) Pub Date : 2022-06-15 , DOI: 10.1111/1462-2920.16099
Weigang Hu ₁ , Qingqing Hou ₁ , Manuel Delgado-Baquerizo _{2,

3} , James C Stegen ₄ , Qiajun Du ₁ , Longwei Dong ₁ , Mingfei Ji ₁ , Yuan Sun ₁ , Shuran Yao ₁ , Haiyang Gong ₁ , Junlan Xiong ₁ , Rui Xia ₁ , Jiayuan Liu ₁ , Muhammad Aqeel ₁ , Muhammad Adnan Akram _{1,

5} , Jinzhi Ran ₁ , Jianming Deng ₁

Affiliation

Archaea represent a diverse group of microorganisms often associated with extreme environments. However, an integrated understanding of biogeographical patterns of the specialist Haloarchaea and the potential generalist ammonia-oxidizing archaea (AOA) across large-scale environmental gradients remains limited. We hypothesize that niche differentiation determines their distinct distributions along environmental gradients. To test the hypothesis, we use a continental-scale research network including 173 dryland sites across northern China. Our results demonstrate that Haloarchaea and AOA dominate topsoil archaeal communities. As hypothesized, Haloarchaea and AOA show strong niche differentiation associated with two ecosystem types mainly found in China's drylands (i.e. deserts vs. grasslands), and they differ in the degree of habitat specialization. The relative abundance and richness of Haloarchaea are higher in deserts due to specialization to relatively high soil salinity and extreme climates, while those of AOA are greater in grassland soils. Our results further indicate a divergence in ecological processes underlying the segregated distributions of Haloarchaea and AOA. Haloarchaea are governed primarily by environmental-based processes while the more generalist AOA are assembled mostly via spatial-based processes. Our findings add to existing knowledge of large-scale biogeography of topsoil archaea, advancing our predictive understanding on changes in topsoil archaeal communities in a drier world.

更新日期：2022-06-15

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11