标題: Impacts of preseason drought on vegetation spring phenology across the Northeast China Transect

作者: Yuan, MX (Yuan, Moxi); Zhao, L (Zhao, Lin); Lin, AW (Lin, Aiwen); Wang, LC (Wang, Lunche); Li, QJ (Li, Qingjun); She, DX (She, Dunxian); Qu, S (Qu, Sai)

來源出版物: SCIENCE OF THE TOTAL ENVIRONMENT  卷: 738  文獻号: 140297  DOI: 10.1016/j.scitotenv.2020.140297  出版年: OCT 10 2020  

摘要: Vegetation phenology is undergoing profound changes in response to the recent increases in the intensity and frequency of drought events. However, the mechanisms bywhich drought affects the start of the growing season (SGS) are poorly understood particularly in arid and semi-arid regions. Here, we identified varying degrees of preseason drought events and analyzed the sensitivity of the SGS to preseason drought across the Northeast China Transect (NECT). Our results showed that drought caused a delayed SGS in grassland ecosystems, but an advanced SGS within forest ecosystems. These contrasting responses to preseason drought reflected different adaptive strategies between vegetation types. The SGS was shown to be highly sensitive to short timescales drought (1-3months) in semi-arid grasslands where annual precipitation is 200-300mm(i.e. SAGE(200-300)). Biomes within this region were found to be most vulnerable out of all the ecosystems to drought. Given the frequent nature of droughts in the mid-latitudes, a drought early warning system was recommended accompanied by improvedmodeling of howthe SGS will be affected by intensified drought under future climate change. (c) 2020 Elsevier B.V. All rights reserved.

入藏号: WOS:000559768800008

語言: English

文獻類型: Article

作者關鍵詞: Spring phenology; Drought; Grassland; Forest; Northeast China Transect

地址: [Yuan, Moxi; Zhao, Lin; Lin, Aiwen; Li, Qingjun; Qu, Sai] Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

[She, Dunxian] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China.

[She, Dunxian] Wuhan Univ, Hubei Prov Key Lab Water Syst Sci Sponge City Con, Wuhan 430072, Peoples R China.

[Wang, Lunche] China Univ Geosci, Sch Geog & Informat Engn, Hubei Key Lab Crit Zone Evolut, Wuhan 430074, Peoples R China.

通訊作者地址: Lin, AW (corresponding author)，Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

電子郵件地址: awlin@whu.edu.cn

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