caa a22 4500 60621948X CHVBK 20210128101118.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s11104-015-2556-8 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2556-8 Land use change decreases soil carbon stocks in Tibetan grasslands [Elektronische Daten] [Na Qiao, Xingliang Xu, Guangmin Cao, Hua Ouyang, Yakov Kuzyakov] Backgrounds and aims: Land use is an important factor affecting soil organic carbon (SOC) dynamics and can produce positive C climate feedback, but its effects remain unknown for Tibetan ecosystems. Methods: Recent land use changes have converted the traditional winter Kobresia pastures of nomads in the northeastern Tibetan Plateau to Elymus pastures or even to cropland. Detailed SOC measurements up to 30-cm depth were combined with analysis of δ13C, δ15N, bulk density, microbial C, and N contents in three land use types. Results: Bulk density was decreased by conversion from Kobresia pasture to cropland but increased by conversion to Elymus pasture. The loss of 1% of SOC caused by land use change leads to δ13C increase of 0.8 ‰. Conversion to cropland significantly decreased SOC stocks (10%) and microbial biomass C, but the C loss (1.6%) was insignificant in Elymus pasture. Land use changes strongly increased soil δ15N in the top 5cm. Conclusions: Conversion to Elymus pasture did not change the C stocks, but conversion to cropland decreased C stocks by 10% within 10years. Soil δ13C and δ15N data indicate acceleration of C and N cycling due to the replacement of Kobresia pasture by Elymus pasture and cropland. Springer International Publishing Switzerland, 2015 Alpine meadow nationallicence Pasture nationallicence Cropland nationallicence Soil organic carbon nationallicence Total nitrogen nationallicence δ13C nationallicence δ15N nationallicence Qiao Na Key Laboratory of Tropical Forest Ecology, Chinese Academy of Sciences, Xishuangbanna Tropical Botanical Garden, 666303, Menglun Mengla, Yunnan, China aut Xu Xingliang Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences, Institute of Geographic Sciences and Natural Resources Research, 11A Datun Road, Chaoyang District, 100101, Beijing, China aut Cao Guangmin Northwest Institute of Plateau Biology, Chinese Academy of Sciences, NO. 23 Xinning Road, 810008, Xining, China aut Ouyang Hua Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences, Institute of Geographic Sciences and Natural Resources Research, 11A Datun Road, Chaoyang District, 100101, Beijing, China aut Kuzyakov Yakov Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences, Institute of Geographic Sciences and Natural Resources Research, 11A Datun Road, Chaoyang District, 100101, Beijing, China aut Plant and Soil Springer International Publishing 395/1-2(2015-10-01), 231-241 0032-079X 395:1-2<231 2015 395 11104 https://doi.org/10.1007/s11104-015-2556-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2556-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Qiao Na Key Laboratory of Tropical Forest Ecology, Chinese Academy of Sciences, Xishuangbanna Tropical Botanical Garden, 666303, Menglun Mengla, Yunnan, China aut NATIONALLICENCE 700 1- Xu Xingliang Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences, Institute of Geographic Sciences and Natural Resources Research, 11A Datun Road, Chaoyang District, 100101, Beijing, China aut NATIONALLICENCE 700 1- Cao Guangmin Northwest Institute of Plateau Biology, Chinese Academy of Sciences, NO. 23 Xinning Road, 810008, Xining, China aut NATIONALLICENCE 700 1- Ouyang Hua Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences, Institute of Geographic Sciences and Natural Resources Research, 11A Datun Road, Chaoyang District, 100101, Beijing, China aut NATIONALLICENCE 700 1- Kuzyakov Yakov Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences, Institute of Geographic Sciences and Natural Resources Research, 11A Datun Road, Chaoyang District, 100101, Beijing, China aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 395/1-2(2015-10-01), 231-241 0032-079X 395:1-2<231 2015 395 11104