IB-CAS  > 植被与环境变化国家重点实验室
Deepened winter snow cover enhances net ecosystem exchange and stabilizes plant community composition and productivity in a temperate grassland
Li, Ping1; Sayer, Emma J.; Jia, Zhou1; Liu, Weixing; Wu, Yuntao1; Yang, Sen1; Wang, Chengzhang1; Yang, Lu1; Chen, Dima3; Bai, Yongfei1; Liu, Lingli1
2020
Source PublicationGLOBAL CHANGE BIOLOGY
ISSN1354-1013
Volume26Issue:5Pages:3015-3027
AbstractGlobal warming has greatly altered winter snowfall patterns, and there is a trend towards increasing winter snow in semi-arid regions in China. Winter snowfall is an important source of water during early spring in these water-limited ecosystems, and it can also affect nutrient supply. However, we know little about how changes in winter snowfall will affect ecosystem productivity and plant community structure during the growing season. Here, we conducted a 5-year winter snow manipulation experiment in a temperate grassland in Inner Mongolia. We measured ecosystem carbon flux from 2014 to 2018 and plant biomass and species composition from 2015 to 2018. We found that soil moisture increased under deepened winter snow in early growing season, particularly in deeper soil layers. Deepened snow increased the net ecosystem exchange of CO2 (NEE) and reduced intra- and inter-annual variation in NEE. Deepened snow did not affect aboveground plant biomass (AGB) but significantly increased root biomass. This suggested that the enhanced NEE was allocated to the belowground, which improved water acquisition and thus contributed to greater stability in NEE in deep-snow plots. Interestingly, the AGB of grasses in the control plots declined over time, resulting in a shift towards a forb-dominated system. Similar declines in grass AGB were also observed at three other locations in the region over the same time frame and are attributed to 4 years of below-average precipitation during the growing season. By contrast, grass AGB was stabilized under deepened winter snow and plant community composition remained unchanged. Hence, our study demonstrates that increased winter snowfall may stabilize arid grassland systems by reducing resource competition, promoting coexistence between plant functional groups, which ultimately mitigates the impacts of chronic drought during the growing season.
Keywordcommunity composition net ecosystem exchange plant biomass semiarid grassland stability winter snow cover
Subject AreaBiodiversity Conservation ; Ecology ; Environmental Sciences
DOI10.1111/gcb.15051
Indexed BySCI
Language英语
WOS KeywordNITROGEN MINERALIZATION ; FUNCTIONAL DIFFERENCES ; SPECIES COEXISTENCE ; INNER-MONGOLIA ; HYDRAULIC LIFT ; WATER-UPTAKE ; CARBON ; DYNAMICS ; PATTERNS ; PRECIPITATION
WOS Research AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS IDWOS:000526102300023
PublisherWILEY
SubtypeArticle
Publication PlaceHOBOKEN
EISSN1365-2486
Funding OrganizationChinese Academy of SciencesChinese Academy of Sciences [XDA23080301] Funding Source: Medline ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31670478, 31988102] Funding Source: Medline ; Chinese National Key Development Program for Basic Research [2017YFC0503900, 2019YFA0607302] Funding Source: Medline
Corresponding Author Emaillingli.liu@ibcas.ac.cn
OAGreen Accepted
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ibcas.ac.cn/handle/2S10CLM1/21807
Collection植被与环境变化国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Sayer, Emma J.] Univ Lancaster, Lancaster Environm Ctr, Lancaster, England
4.China Three Gorges Univ, Coll Biol & Pharmaceut Sci, Yichang, Peoples R China
Recommended Citation
GB/T 7714
Li, Ping,Sayer, Emma J.,Jia, Zhou,et al. Deepened winter snow cover enhances net ecosystem exchange and stabilizes plant community composition and productivity in a temperate grassland[J]. GLOBAL CHANGE BIOLOGY,2020,26(5):3015-3027.
APA Li, Ping.,Sayer, Emma J..,Jia, Zhou.,Liu, Weixing.,Wu, Yuntao.,...&Liu, Lingli.(2020).Deepened winter snow cover enhances net ecosystem exchange and stabilizes plant community composition and productivity in a temperate grassland.GLOBAL CHANGE BIOLOGY,26(5),3015-3027.
MLA Li, Ping,et al."Deepened winter snow cover enhances net ecosystem exchange and stabilizes plant community composition and productivity in a temperate grassland".GLOBAL CHANGE BIOLOGY 26.5(2020):3015-3027.
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