IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Grassland types and season-dependent response of ecosystem respiration to experimental warming in a permafrost region in the Tibetan Plateau
Tao Zhang1,2; Genxu Wang2; Yan Yang2; Tianxu Mao2,3; Xiaopeng Chen2
Corresponding AuthorGenxu Wang
2017
Source PublicationAGRICULTURAL AND FOREST METEOROLOGY
ISSN0168-1923
EISSN1873-2240
Volume247Pages:271-279
SubtypeArticle
Abstract

Information regarding the response of ecosystem respiration (ER) to various warming levels, especially in different grassland types and seasons, is scarce at the field scale in the permafrost region of the Tibetan Plateau (TP). In this study, we examined how different warming levels during different seasons affected ER in Tibetan alpine meadow and swamp meadow after 6 years experimental warming. The interpolated annual ER of swamp meadow (387.0 gC m−2 ) was higher than that of alpine meadow (284.5 gC m−2 ) in natural conditions. A moderate warming of 2.4 °C increased ER by 62.2% and 36.6%, and a high warming of 5.3 °C increased ER by 101.3% and 52.0% in alpine meadow and swamp meadow, respectively. The warming effects on ER were greater in the non-growing season compared with the growing season; this significantly increased the contribution of non-growing season emissions to annual ER from 25% in natural conditions to 31% in high warming treatments. ER was significantly affected by soil temperature, aboveground biomass and the duration of thaw days. The temperature sensitivity of ER (Q10) was higher in the non-growing season (3.02–5.02) than in the growing season (2.11–2.75) and decreased with increasing temperature. Our results indicated that the magnitude of warming-induced increases in ER differed by grassland type and season, and there was strong potential for the non-growing season to serve as a positive feedback to annual carbon balance.

KeywordClimate Change Co2 Tundra Alpine Meadow Qinghai-tibet Plateau
DOI10.1016/j.agrformet.2017.08
Indexed BySCI
Language英语
Quartile1区
TOP
WOS IDWOS:000416186700025
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20660
Collection山地表生过程与生态调控重点实验室
Affiliation1.Institute of New Rural Development, Guizhou University, Guiyang 550025, China
2.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
3.College of Forestry, Guizhou University, Guiyang 550025, China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Tao Zhang,Genxu Wang,Yan Yang,et al. Grassland types and season-dependent response of ecosystem respiration to experimental warming in a permafrost region in the Tibetan Plateau[J]. AGRICULTURAL AND FOREST METEOROLOGY,2017,247:271-279.
APA Tao Zhang,Genxu Wang,Yan Yang,Tianxu Mao,&Xiaopeng Chen.(2017).Grassland types and season-dependent response of ecosystem respiration to experimental warming in a permafrost region in the Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,247,271-279.
MLA Tao Zhang,et al."Grassland types and season-dependent response of ecosystem respiration to experimental warming in a permafrost region in the Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 247(2017):271-279.
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