@article{1ac42ec7aad6477aaae22b800082458e,
title = "Divergent responses of ecosystem respiration components to livestock exclusion on the Qinghai Tibetan Plateau",
abstract = "Grazing exclusion (GE) is an effective method for protecting degraded grasslands, and it can profoundly affect ecosystem carbon (C) cycles. Ecosystem respiration (ER), which includes both autotrophic and heterotrophic respiration (HR), accounts for the largest land-to-atmosphere C fluxes. How ER responds to GE is still unclear, however, and to investigate this, a controlled GE experiment was conducted at a meadow grassland near Qinghai Lake, China. Animal exclusion enhanced ER and aboveground plant respiration (Ragb) by 10.5% and 40.1%, respectively, but it suppressed soil respiration by 12.4% and HR by 17.6%. Positive responses of ER and Ragb were linked to increased aboveground biomass, particularly graminoids biomass. Negative responses of soil respiration and HR were associated with GE-induced changes in microbial biomass C and nitrogen. These results show that grassland responded in complex ways to GE and that ER and its components were regulated by both abiotic and biotic factors. Moreover, the divergent responses of respiration components have important implications for models of terrestrial C cycles and climate under enhanced human activities and changes in land use.",
keywords = "ecosystem respiration, livestock grazing, meadow grassland, microbial biomass, plant functional types",
author = "Ji Chen and Yiqi Luo and Jianyang Xia and Xuhui Zhou and Shuli Niu and Shelby Shelton and Wei Guo and Suixin Liu and Wenting Dai and Junji Cao",
note = "Funding Information: This study was supported by National Natural Science Foundation of China (41701292), Fundamental Research Funds for the Central Universities (3102016QD078), China Postdoctoral Projects (2017M610647), the Natural Science Basic Research Plan in Shaanxi Province (2017JQ3041), the State Key Laboratory of Loess and Quaternary Geology (SKLLQG1602), and the Key Laboratory of Aerosol Chemistry and Physics (KLACP‐17‐02), Institute of Earth Environment, Chinese Academy of Sciences. China Ministry of Science & Technology (2012BAH31B03). This work was also supported by NSFC‐Yunnan United fund (U1302267), the National Science Fund for Distinguished Young Scholars (31325005). Contributions from Dr. Luo's Eco‐lab to this study were financially supported by United States Department of Energy grant DE‐SC00114085 and US National Science Foundation (NSF) grants EF 1137293 and OIA‐1301789. The authors also gratefully acknowledge the China Scholarship Council. Funding Information: Funding information: US National Science Foundation, Grant/Award Number: DBI 0850290, EPS0919466, DEB 0743778, DEB 0840964 OIA‐1301789 and EF 1137293; China Ministry of Science & Technology, Grant/Award Number: 2012BAH31B03; China Scholarship Council; United States Department of Energy, Grant/Award Number: DE‐SC00114085; National Science Fund for Distinguished Young Scholars, Grant/Award Number: 31325005; NSFC‐Yunnan United fund, Grant/Award Number: U1302267; Key Laboratory of Aerosol Chemistry and Physics, Grant/Award Number: KLACP‐17‐02; State Key Laboratory of Loess and Quaternary Geology, Grant/Award Number: SKLLQG1602; Natural Science Basic Research Plan in Shaanxi Province, Grant/Award Number: 2017JQ3041; China Postdoctoral Projects, Grant/Award Number: 2017M610647; Fundamental Research Funds for the Central Universities, Grant/Award Number: 3102016QD078; National Natural Science Foundation of China, Grant/Award Number: 41701292 Funding Information: This study was supported by National Natural Science Foundation of China (41701292), Fundamental Research Funds for the Central Universities (3102016QD078), China Postdoctoral Projects (2017M610647), the Natural Science Basic Research Plan in Shaanxi Province (2017JQ3041), the State Key Laboratory of Loess and Quaternary Geology (SKLLQG1602), and the Key Laboratory of Aerosol Chemistry and Physics (KLACP-17-02), Institute of Earth Environment, Chinese Academy of Sciences. China Ministry of Science & Technology (2012BAH31B03). This work was also supported by NSFC-Yunnan United fund (U1302267), the National Science Fund for Distinguished Young Scholars (31325005). Contributions from Dr. Luo's Eco-lab to this study were financially supported by United States Department of Energy grant DE-SC00114085 and US National Science Foundation (NSF) grants EF 1137293 and OIA-1301789. The authors also gratefully acknowledge the China Scholarship Council. Publisher Copyright: Copyright {\textcopyright} 2018 John Wiley & Sons, Ltd.",
year = "2018",
month = jun,
doi = "10.1002/ldr.2981",
language = "English (US)",
volume = "29",
pages = "1726--1737",
journal = "Land Degradation and Development",
issn = "1085-3278",
publisher = "John Wiley and Sons Ltd",
number = "6",
}