标题: Recent responses of grassland net primary productivity to climatic and anthropogenic factors in Kyrgyzstan

作者: Wang, YW (Wang, Yanwen); Yue, HB (Yue, Huanbi); Peng, Q (Peng, Qing); He, C (He, Chao); Hong, S (Hong, Song); Bryan, BA (Bryan, Brett A.)

来源出版物: LAND DEGRADATION & DEVELOPMENT DOI: 10.1002/ldr.3623提前访问日期: MAY 2020

摘要: Net primary productivity (NPP) is an essential indicator of ecosystem function and sustainability and plays a vital role in the carbon cycle, especially in arid and semiarid grassland ecosystems. Quantifying trends in NPP and identifying the contributing factors are important for understanding the relative impacts of climate change and human activities on grassland degradation. For our case-study of Kyrgyzstan, we quantified from 2000 to 2014 the spatial and temporal patterns in climate-driven potential NPP (NPPP) using the Zhou Guangsheng model specifically developed for Asian grasslands, and actual NPP (NPPA) using the globally calibrated MOD17A3 NPP data product. By calculating the difference between NPPP and NPPA, we inferred human-induced NPP (NPPH) and thereby characterized changes in grassland NPP attributable to anthropogenic activities. The results showed that grassland NPPA in Kyrgyzstan experienced a slight decrease over time at an average rate of -0.87 g C center dot m(-2)center dot yr(-1) but patterns varied between provinces. Nearly 60% of Kyrgyzstan's grasslands experienced degradation mostly in the northern parts of the country, while grassland NPPA increased over more than 40% of the study area, occurring mostly in the south. Climate change, in particular change in precipitation was the dominant factor driving grassland degradation in the north but human pressures also contributed. In the south, however, human activities were associated with extensive areas of grassland recovery. The results provide important contextual understanding for supporting policy for grassland conservation and restoration under future climate change and intensifying human pressures.

入藏号: WOS:000534098900001

语言: English

文献类型: Article; Early Access

作者关键词: climate change; grassland; human activities; Kyrgyzstan; livestock; net primary productivity

地址: [Wang, Yanwen; He, Chao; Hong, Song] Wuhan Univ, Sch Resource & Environm Sci, 129 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.

[Wang, Yanwen; Yue, Huanbi; Bryan, Brett A.] Deakin Univ, Ctr Integrat Ecol, Melbourne, Vic, Australia.

[Yue, Huanbi] Beijing Normal Univ, Fac Geog Sci, Sch Nat Resources, Beijing, Peoples R China.

[Peng, Qing] Nanjing Univ Informat Sci & Technol, Sch Appl Meteorol, Nanjing, Peoples R China.

通讯作者地址: Hong, S (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, 129 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.

电子邮件地址:songhongpku@126.com

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