Heterotrophic respiration and its proportion to total soil respiration decrease with warming but increase with clipping
文献类型：期刊论文
| 作者 | Yan, Yingjie1,2; Wang, Jinsong1; Tian, Dashuan1; Zhang, Ruiyang1; Song, Lei1,2; Li, Zhaolei3,4; Niu, Shuli1,2 |
| 刊名 | CATENA
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 215页码:8 |
| ISSN号 | 0341-8162 |
| 关键词 | Climate warming Land-use change Soil respiration Carbon cycle Qinghai-Tibet Plateau Alpine meadow |
| DOI | 10.1016/j.catena.2022.106321 |
| 通讯作者 | Niu, Shuli(sniu@igsnrr.ac.cn) |
| 英文摘要 | Revealing how heterotrophic respiration (Rh) and its contribution to soil respiration (R-s, R-h/R-s ratio) respond to climate warming and land-use change is crucial for advancing our understanding of the feedback between the terrestrial carbon (C) cycle and future climate changes. Here we conducted a 7-year manipulation experiment by warming and clipping to explore their impacts on R-h and R-h/R(s & nbsp;)ratio in an alpine meadow on the Qinghai-Tibet Plateau. Infrared heaters were used to simulate climate warming and clipping was applied to mimic yearly hay or biofuel harvest. We found that, on average, warming significantly decreased R-h/R-s ratio by 5.5%, which was attributed to the little change in Rh and increased autotrophic respiration (Ra, 18.3%) under warming. In contrast, clipping significantly increased R-h/R-s ratio by 8.1%, which was mainly due to the clipping-induced increase in Rh (22.6%) and decrease in Ra (3.9%). Warming or clipping-induced changes in Rh and the R-h/R-s ratio were mainly controlled by the microbial metabolic quotient, microbial biomass C and nitrogen, soil moisture, and soil temperature. Moreover, warming and clipping both increased R-s by 13.2% and 15.5%, respectively, over the study period. Our study highlights the differential responses of the two soil respiration components to warming and clipping, and suggests that climate warming does not necessarily increase Rh but clipping largely stimulates Rh, which may accelerate the turnover and losses of soil C in this alpine meadow. Hence, quantifying how R-h and the R-h/R-s ratio respond to global changes has large implications for better predicting the future ecosystem C cycle and its feedback to climate system in ecosystem models. |
| WOS关键词 | ORGANIC-CARBON DECOMPOSITION ; NET PRIMARY PRODUCTIVITY ; MICROBIAL BIOMASS ; INTERANNUAL VARIABILITY ; RESPONSES ; GRASSLAND ; TEMPERATURE ; NITROGEN ; COMPONENTS ; CYCLE |
| 资助项目 | National Natural Science Foundation of China[31988102] ; Second Tibetan Plateau Sci-entific Expedition and Research (STEP) program[2019QZKK0302] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000798081500001 |
| 资助机构 | National Natural Science Foundation of China ; Second Tibetan Plateau Sci-entific Expedition and Research (STEP) program |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/177811]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Niu, Shuli |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Dept Ecol & Environm, Beijing, Peoples R China 3.Southwest Univ, Coll Resources & Environm, Interdisciplinary Res Ctr Agr Green Dev Yangtze Ri, Chongqing, Peoples R China 4.Southwest Univ, Acad Agr Sci, Chongqing, Peoples R China |
| 推荐引用方式 GB/T 7714 |
Yan, Yingjie,Wang, Jinsong,Tian, Dashuan,et al. Heterotrophic respiration and its proportion to total soil respiration decrease with warming but increase with clipping [J]. CATENA,2022,215:8. |
| APA |
Yan, Yingjie.,Wang, Jinsong.,Tian, Dashuan.,Zhang, Ruiyang.,Song, Lei.,...&Niu, Shuli.(2022). Heterotrophic respiration and its proportion to total soil respiration decrease with warming but increase with clipping .CATENA,215,8. |
| MLA |
Yan, Yingjie,et al." Heterotrophic respiration and its proportion to total soil respiration decrease with warming but increase with clipping ".CATENA 215(2022):8. |
入库方式： OAI收割
来源：地理科学与资源研究所
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