A keystone microbial enzyme for nitrogen control of soil carbon storage

Science Advances
Ji ChenRui-Wu Wang

Abstract

Agricultural and industrial activities have increased atmospheric nitrogen (N) deposition to ecosystems worldwide. N deposition can stimulate plant growth and soil carbon (C) input, enhancing soil C storage. Changes in microbial decomposition could also influence soil C storage, yet this influence has been difficult to discern, partly because of the variable effects of added N on the microbial enzymes involved. We show, using meta-analysis, that added N reduced the activity of lignin-modifying enzymes (LMEs), and that this N-induced enzyme suppression was associated with increases in soil C. In contrast, N-induced changes in cellulase activity were unrelated to changes in soil C. Moreover, the effects of added soil N on LME activity accounted for more of the variation in responses of soil C than a wide range of other environmental and experimental factors. Our results suggest that, through responses of a single enzyme system to added N, soil microorganisms drive long-term changes in soil C accumulation. Incorporating this microbial influence on ecosystem biogeochemistry into Earth system models could improve predictions of ecosystem C dynamics.

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Citations

Jan 8, 2020·Global Change Biology·Ji ChenUffe Jørgensen
Feb 13, 2019·Science Advances·Yu JiangWeijian Zhang
Nov 8, 2020·Global Change Biology·Jessica A M MooreSerita D Frey
May 29, 2019·Journal of Environmental Management·Clariana Valadares XavierNewton La Scala Júnior
Jun 10, 2021·Research : a Science Partner Journal·Baojing GuYong-Guan Zhu
Oct 16, 2021·Global Change Biology·Xin ZhaoHai-Lin Zhang
Nov 18, 2021·Ecology Letters·William A ArgiroffJulia P Belke

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Software Mentioned

R package metafor
glmulti
Engauge Digitizer
R

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