Biotic and abiotic controls in determining exceedingly variable responses of ecosystem functions to extreme seasonal precipitation in a mesophytic alpine grassland

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Biotic and abiotic controls in determining exceedingly variable responses of ecosystem functions to extreme seasonal precipitation in a mesophytic alpine grassland
	Sun, Geng 1,2; Wang, Zhiyuan 1,2,3; Zhu-Barker, Xia 4; Zhang, Nannan 1,2; Wu, Ning 1,2; Liu, Lin 5; Lei, Yanbao6
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	2016-11-15
卷号	228 页码:180-190
关键词	Extreme precipitation Seasonality Biomass accumulation and allocation Resistance arid resilience Nutrient cycling Mesophytic alpine grassland
ISSN号	0168-1923
通讯作者	Sun, Geng ; Lei, Yanbao
英文摘要	As a result of global climate change, frequent and intensive extreme climate events are observed and predicted. These extreme climate events can change ecosystem functions through driving plant growth and mortality, as well as ecological and evolutionary processes into different directions. We simulated a 1-in-100-year extreme precipitation event in different plant growth seasons (i.e. spring, summer, or autumn) to investigate the functional responses of a mesophytic alpine grassland ecosystem to climate change in the Tibetan plateau. The results demonstrated that the seasonal distribution of extreme precipitation is a critical factor in determining soil microbial- and plant-productivity. The response of vegetation net primary productivity (NPP) to extreme precipitation depends on the growth seasons and plant types. Total NPP in the treatments experienced extreme precipitation in the early (spring), mid- (summer) and late (autumn) plant growth seasons were significant lower, higher, and no difference, respectively, compared with the control. Soil temperature and moisture were the key abiotic factors that affected ecosystem functions. For example, in the early plant growth season, no changes of soil moisture and the decreased temperature in response to the extreme precipitation resulted in a substantial decline in NPP. By contrast, in the mid-plant growth season, higher temperature and soil moisture elicited positive synergistic effects on plant growth and soil microbial processes. The increased sensitivity of above-ground NPP and the shift of dominant species from sedges to less palatable forbs might inevitably exaggerate the degradation of this grassland. Nevertheless, a high resilience index in the related ecological processes could potentially contribute to the grassland acclimation and stability, as most parameters returned to the similar levels as in the control after the extreme events ceased. Therefore, several synergistic or antagonistic mechanisms are hypothesized to operate in parallel or at different levels of organization and timescales. Further studies involving a range of different potential scenarios and longer periods are needed to predict the future climate change impacts on mesophytic grassland. (C) 2016 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
研究领域[WOS]	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
关键词[WOS]	QINGHAI-TIBETAN PLATEAU ; CLIMATE EXTREMES ; ECOLOGICAL RESILIENCE ; RAINFALL REGIMES ; SOUTHERN CHINA ; PLANT TRAITS ; DYNAMICS ; EVENTS ; FORESTS ; CARBON
收录类别	SCI
语种	英语
WOS记录号	WOS:000383295200015
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17634]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Mt Ecol Restorat & Bioresource Utilizat, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Chengdu Inst Biol, Chengdu 610041, Peoples R China 3.Yunnan Acad Agr Sci, Inst Agr Environm & Resources, Kunming 650205, Peoples R China 4.Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA 5.Sichuan Agr Univ, Coll Anim Sci & Technol, Chengdu 611130, Peoples R China 6.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Sun, Geng,Wang, Zhiyuan,Zhu-Barker, Xia,et al. Biotic and abiotic controls in determining exceedingly variable responses of ecosystem functions to extreme seasonal precipitation in a mesophytic alpine grassland[J]. AGRICULTURAL AND FOREST METEOROLOGY,2016,228:180-190.
APA	Sun, Geng.,Wang, Zhiyuan.,Zhu-Barker, Xia.,Zhang, Nannan.,Wu, Ning.,...&Lei, Yanbao.(2016).Biotic and abiotic controls in determining exceedingly variable responses of ecosystem functions to extreme seasonal precipitation in a mesophytic alpine grassland.AGRICULTURAL AND FOREST METEOROLOGY,228,180-190.
MLA	Sun, Geng,et al."Biotic and abiotic controls in determining exceedingly variable responses of ecosystem functions to extreme seasonal precipitation in a mesophytic alpine grassland".AGRICULTURAL AND FOREST METEOROLOGY 228(2016):180-190.