Differential responses of ecosystem respiration components to experimental warming in a meadow grassland on the Tibetan Plateau
文献类型：SCI/SSCI论文
| 作者 | Chen J.; Luo, Y. Q.; Xia, J. Y.; Shi, Z.; Jiang, L. F.; Niu, S. L.; Zhou, X. H.; Cao, J. J. |
| 发表日期 | 2016 |
| 关键词 | Ecosystem respiration Soil respiration Total autotrophic respiration Heterotrophic respiration Experimental warming Tibetan Plateau carbon-cycle feedback open-top chambers soil co2 efflux autotrophic respiration thermal-acclimation climate-change alpine meadow heterotrophic respiration temperature sensitivity microbial respiration |
| 英文摘要 | Global warming is anticipated to have profound effects on terrestrial carbon fluxes and thus feed backs to future climate change. Ecosystem respiration (R-eco) is one of the dominant components of biosphere CO2 fluxes, but the effects of warming on Reco are still unclear. A field warming experiment using open top chambers (OTCs) was conducted in a meadow grassland on the Tibetan Plateau to study the effects of warming on the components of Reco. Warming significantly enhanced above-ground plant respiration (R-agb) and total autotrophic plant respiration (R-plant 1 by 28.7% and 19.9%, respectively, but reduced heterotrophic respiration (R-h) by 10.4%. These different responses resulted in the insensitive responses of Reco and soil respiration (R-s) to the experimental warming. The warming treatment also increased R-plant/R-eco and R-agb/R-eco. by 8.4% and 17.3%, respectively, while decreasing R-h/R-eco, by 19.0%, suggesting that warming could eventually cause R-eco to be dominated by R-plant. Enhancements in Roam and R-agb were related to the warming-induced increases in aboveground biomass (AGB) while reduced R-h was closely coupled with warming-induced decrease of microbial biomass carbon. Our results highlight that the differential responses of the components of R-eco to different environmental physics under warming scenarios should be taken into consideration to project the future carbon-climate feed backs. (C) 2016 Elsevier B.V. All rights reserved. |
| 出处 | Agricultural and Forest Meteorology |
| 卷 | 220 |
| 页 | 21-29 |
| 语种 | 英语 |
| ISSN号 | 0168-1923 |
| DOI标识 | 10.1016/j.agrformet.2016.01.010 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/42884]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Chen J.,Luo, Y. Q.,Xia, J. Y.,et al. Differential responses of ecosystem respiration components to experimental warming in a meadow grassland on the Tibetan Plateau. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。