caa a22 4500 606218017 CHVBK 20210128101110.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s11104-014-2337-9 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2337-9 Quantifying the impact of drought on soil-plant interactions: a seasonal analysis of biotic and abiotic controls of carbon and nutrient dynamics in high-altitudinal grasslands [Elektronische Daten] [Zhiyuan Wang, Lucas Silva, Geng Sun, Peng Luo, Chengxiang Mou, William Horwath] Background and aims: Understanding the impacts of ever more severe and widespread drought events has become a central focus of recent ecological research. Accordingly, the objective of this study is to investigate fundamental mechanisms that control drought effects on climate sensitive ecosystems by regulating soil-plant interactions. Methods: Field experiments were conducted in high altitudinal grasslands of the Tibetan Plateau. Based on historical records, we simulated extreme drought events, intercepting water inputs in early (spring), mid (summer), and late (autumn) periods of the plant-growing season (PGS). We measured vegetation responses to changes in soil physical, chemical, and biological properties, examining how the interplay of abiotic and biotic processes regulate the impacts of drought above and below ground. Results: Decreasing water input resulted in proportional increases in summer and autumn soil temperature, but reduced soil temperature during the spring drought. As a result, soil microbial biomass and available N and P concentrations remained stable during the early-PGS drought, while enzymatic activity, decomposition of organic materials, and nutrient release increased during the mid- and late-PGS. Concerted changes in microbial and plant activity determined seasonal fluctuations in carbon assimilation, microbial activity and nutrient dynamics, with varying degrees of resistance and resilience to drought stress observed at different PGS periods. Conclusions: Significant interactions were observed between plant productivity and microbial activity in response to moisture variability and associated changes in soil temperature, with the largest deleterious drought effects registered during the summer, when competition for limiting resources between plants and microorganisms was strongest. Springer International Publishing Switzerland, 2014 Climate change nationallicence Drought stress nationallicence Nutrient limitation nationallicence Soil-plant interactions nationallicence Tibet nationallicence Wang Zhiyuan Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Road S, Chengdu, Sichuan, People's Republic of China aut Silva Lucas Biogeochemistry and Nutrient Cycling Lab, University of California, One Shields Avenue, 95616-8627, Davis, CA, USA aut Sun Geng Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Road S, Chengdu, Sichuan, People's Republic of China aut Luo Peng Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Road S, Chengdu, Sichuan, People's Republic of China aut Mou Chengxiang Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Road S, Chengdu, Sichuan, People's Republic of China aut Horwath William Biogeochemistry and Nutrient Cycling Lab, University of California, One Shields Avenue, 95616-8627, Davis, CA, USA aut Plant and Soil Springer International Publishing 389/1-2(2015-04-01), 59-71 0032-079X 389:1-2<59 2015 389 11104 https://doi.org/10.1007/s11104-014-2337-9 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/s11104-014-2337-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Zhiyuan Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Road S, Chengdu, Sichuan, People's Republic of China aut NATIONALLICENCE 700 1- Silva Lucas Biogeochemistry and Nutrient Cycling Lab, University of California, One Shields Avenue, 95616-8627, Davis, CA, USA aut NATIONALLICENCE 700 1- Sun Geng Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Road S, Chengdu, Sichuan, People's Republic of China aut NATIONALLICENCE 700 1- Luo Peng Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Road S, Chengdu, Sichuan, People's Republic of China aut NATIONALLICENCE 700 1- Mou Chengxiang Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, No.9 Section 4, Renmin Road S, Chengdu, Sichuan, People's Republic of China aut NATIONALLICENCE 700 1- Horwath William Biogeochemistry and Nutrient Cycling Lab, University of California, One Shields Avenue, 95616-8627, Davis, CA, USA aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 389/1-2(2015-04-01), 59-71 0032-079X 389:1-2<59 2015 389 11104