Microbial membranes related to the thermal acclimation of soil heterotrophic respiration in a temperate steppe in northern China
Microbial membranes related to the thermal acclimation of soil heterotrophic respiration in a temperate steppe in northern China
复制标题
中国北方温带草原土壤异养呼吸热驯化相关的微生物膜
DOI：
10.1111/ejss.12872
复制
发表时间：
2019-08
影响因子：
4.2
通讯作者：
He Nianpeng
中科院分区：
文献类型：
--
作者：
Shen Ruichang;Xu Ming;Chi Yonggang;Yu Shen;Wan Shiqiang;He Nianpeng
关于土壤呼吸对气候变化的短暂反应机制，生态学家之间一直存在着激烈的争论。关键问题是土壤微生物在较温暖的温度条件下是否会降低其生理速率（热适应），以及其机制是什么。通过长期增温现场实验，我们探索了中国内蒙古温带草原生态系统土壤异养呼吸（Rh）的热适应。这项研究还测试了热驯化机制，即土壤微生物脂质组成的变化。我们的结果表明，6年的增温处理显着降低了土壤质量特异性呼吸（底物Rmass），表明土壤Rh将适应长期变暖。此外，我们发现这种热驯化呈现出II型驯化，因为实验变暖显着降低了底物Rmass，但没有降低Q10值。此外，我们还发现，长期实验变暖已经增加了群落水平土壤微生物膜中脂肪酸的碳数。总之，我们的结果表明土壤 Rh 可以通过改变细胞膜结构来适应全球变暖，这些机制将在不久的将来发挥重要作用。
There has been an active debate among ecologists about the mechanisms of ephemeral response of soil respiration to climate change. The key questions are whether soil microbes would reduce their physiological rates (thermal acclimation) under a warmer temperature regime，and what are the mechanisms. Using a long‐term warming field experiment, we explored the thermal acclimation of soil heterotrophic respiration (Rh) in a temperate steppe ecosystem in Inner Mongolia, China. A thermal acclimation mechanism, namely change in lipid composition of soil microbes, was also tested in this study. Our results showed that 6 years of warming treatment had significantly decreased soil mass‐specific respiration (substrate Rmass), indicating soil Rh would acclimate to long‐term warming. In addition, we found that this thermal acclimation presented type II acclimation, because experimental warming significantly decreased substrate Rmass but not the Q10 values. Furthermore, we also found that long‐term experimental warming had already increased the carbon numbers of the fatty acids in soil microbial membranes at the community level. In summary, our results indicated that soil Rh could acclimate to global warming via modifying cell membrane constitutions and these mechanisms would play vital roles in the near future.
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影响因子：
5.2
作者：
Bajerski F;Wagner D;Mangelsdorf K
通讯作者：
Mangelsdorf K
昼夜变暖对根系寿命的影响不同
影响因子：
4.9
作者：
Bai, W. M.;Xia, J. Y.;Li, L. H.
通讯作者：
Li, L. H.
影响因子：
2.7
作者：
Lagerspetz, KYH
通讯作者：
Lagerspetz, KYH
影响因子：
3.7
作者：
Chi Y;Xu M;Shen R;Yang Q;Huang B;Wan S
通讯作者：
Wan S
影响因子：
4
作者：
Jing, Xin;Wang, Yonghui;He, Jin-Sheng
通讯作者：
He, Jin-Sheng