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Effects of climatic factors on the net primary productivity in the source region of Yangtze River, China

Yuan, Zhe, Wang, Yongqiang, Xu, Jijun, Wu, Zhiguang·2021·Scientific Reports
DOI 10.1038/s41598-020-80494-9PMC PMC7809463
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Abstract

The ecosystem of the Source Region of Yangtze River (SRYR) is highly susceptible to climate change. In this study, the spatial–temporal variation of NPP from 2000 to 2014 was analyzed, using outputs of Carnegie–Ames–Stanford Approach model. Then the correlation characteristics of NPP and climatic factors were evaluated. The results indicate that: (1) The average NPP in the SRYR is 100.0 gC/m 2 from 2000 to 2014, and it shows an increasing trend from northwest to southeast. The responses of NPP to altitude varied among the regions with the altitude below 3500 m, between 3500 to 4500 m and above 4500 m, which could be attributed to the altitude associated variations of climatic factors and vegetation types; (2) The total NPP of SRYR increased by 0.18 TgC per year in the context of the warmer and wetter climate during 2000–2014. The NPP was significantly and positively correlated with annual temperature and precipitation at interannual time scales. Temperature in February, March, May and September make greater contribution to NPP than that in other months. And precipitation in July played a more crucial role in influencing NPP than that in other months; (3) Climatic factors caused the NPP to increase in most of the SRYR. Impacts of human activities were concentrated mainly in downstream region and is the primary reason for declines in NPP.

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Metadata

Authors
Yuan, Z., Wang, Y., Xu, J., & Wu, Z.
Venue
Scientific Reports
Publisher
Springer Science and Business Media LLC
Published
2021-01-14
Volume
11
Issue
1
ISSN
2045-2322
DOI
10.1038/s41598-020-80494-9
PMC
PMC7809463
Cited by
53
References
0
Language
en
Licence
Funders
National Natural Science Foundation of China (41890821)

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