气候变化领域集成服务门户(CCPortal): Net neutral carbon responses to warming and grazing in alpine grassland ecosystems

CCPortal

DOI	10.1016/j.agrformet.2019.107792
	Net neutral carbon responses to warming and grazing in alpine grassland ecosystems
	Lv Wangwang; Luo Caiyun; Zhang Lirong; Niu Haishan; Zhang Zhenhua; Wang Shiping; Wang Yanfen; Jiang Lili; Wang Yonghui; He Jinsheng; Paul, Kardol; Wang Qi; Li Bowen; Liu Peipei; Tsechoe, Dorji; Zhou Huakun; Zhao Xinquan; Zhao Liang
通讯作者	Wang, SP (通讯作者)
发表日期	2020
ISSN	0168-1923
EISSN	1873-2240
卷号	280
英文摘要	In natural grasslands, effects of warming on net ecosystem CO2 exchange (NEE) may interact with grazing. Yet, the effects of these two main drivers of terrestrial carbon cycling are typically studied in isolation, limiting our understanding of how NEE would be affected under different global change scenarios. Here, we report results of a warming experiment using infrared heaters combined with summer and winter grazing for 7-years in a Tibetan alpine grassland. We found that regardless of warming summer grazing decreased soil carbon sink (i.e., increased annual mean net biome productivity (NBP) indicated by a negative value of NBP), and warming also reduced soil carbon sink under no-grazing only during 3-years of summer grazing. However, warming and grazing did not change soil carbon sink during 4-years of winter grazing. Interactive effects between warming and grazing on annual NBP varied with year and grazing season. Overall, both warming and grazing did not alter annual mean NBP under 7-years of the rotational grazing system in summer and winter grasslands because of offsetting effects on annual mean gross primary productivity and ecosystem respiration. Annual mean soil temperature explained 58% of the variation of annual mean NBP during summer grazing, whereas seasonal mean soil moisture explained 48 and 44% of its variation during winter grazing and the two season grazing system, respectively. Together, our results suggest that rotational grazing between summer and winter alpine grasslands would result in net neutral climate feedback based on the response of annual NBP under future warming. The two season grazing system not only supports animal production but also realizes balance in the soil carbon budget under future warming.
关键词	SOIL MICROBIAL COMMUNITY INTERANNUAL VARIABILITY SPECIES COMPOSITION TEMPERATURE SENSITIVITY FUNCTIONAL STRUCTURE TALLGRASS PRAIRIE GROWING SEASONS NITROGEN POOLS DIOXIDE FLUXES RESPIRATION
英文关键词	Gross primary production; Ecosystem respiration; Net ecosystem CO2 exchange; Warming and grazing; Alpine grassland; Tibetan Plateau
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000525807000029
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259999
推荐引用方式 GB/T 7714	Lv Wangwang,Luo Caiyun,Zhang Lirong,et al. Net neutral carbon responses to warming and grazing in alpine grassland ecosystems[J]. 中国科学院青藏高原研究所,2020,280.
APA	Lv Wangwang.,Luo Caiyun.,Zhang Lirong.,Niu Haishan.,Zhang Zhenhua.,...&Zhao Liang.(2020).Net neutral carbon responses to warming and grazing in alpine grassland ecosystems.AGRICULTURAL AND FOREST METEOROLOGY,280.
MLA	Lv Wangwang,et al."Net neutral carbon responses to warming and grazing in alpine grassland ecosystems".AGRICULTURAL AND FOREST METEOROLOGY 280(2020).