4.7 Article

Warming threatens the microbial communities in middle -high latitude peatland: Evidence from testate amoebae

期刊

SOIL BIOLOGY & BIOCHEMISTRY
卷 153, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2020.108105

关键词

Climate warming; Water table depth; Protozoa; Peatland degradation; Permafrost region

资金

  1. National Key Research and Development Program of China [2016YFA0602303-1, 2018YFC1802602]
  2. Program for First-class Discipline Construction in Guizhou Province, China [GNYL2017-009]
  3. National Natural Science Foundation of China [41807055]
  4. Program of Introducing Talents of Discipline to Universities, China [B16011]
  5. National Science & Technology Fundamental Re sources Investigation Program of China [2018FY100300]

向作者/读者索取更多资源

The study found that changes in water table depth caused by experimental warming affected the testate amoebae community in peatlands, which could have consequences for the stability of the microbial food web and carbon cycling.
Testate amoebae contribute significantly to belowground ecological processes like nutrient cycling, but a decline in their nutrient cycling functions in peatlands is expected due to global climate warming. We studied the dynamics of testate amoebae communities in relation to soil environmental variables in a permafrost peatland that experienced in situ experimental warming for a 7-yr period. Experimental warming reduced testate amoebae biomass by 41%. Redundancy analyses showed that testate amoebae community structure was correlated with water table depth and soil temperature (these explained 10% of the variance in community structure) and dissolved organic carbon (which explained 2.2% of the variance). Our results demonstrated that warming-induced changes to the water table depth affected the testate amoebae community in peatland, which could have consequences for the stability of the microbial food web and carbon cycling in peatland ecosystems.

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