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[1]FENG Wan,XIE Shiyou.Spatiotemporal Characteristics and Influencing Factors of Vegetation NPP in the Yangtze River Basin from 2000 to 2015[J].Research of Soil and Water Conservation,2022,29(01):176-183.

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Spatiotemporal Characteristics and Influencing Factors of Vegetation NPP in the Yangtze River Basin from 2000 to 2015

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 01 Page number: 176-183 Column: Public date: 2022-02-20

Title:: Spatiotemporal Characteristics and Influencing Factors of Vegetation NPP in the Yangtze River Basin from 2000 to 2015

Author(s):: FENG Wan¹, XIE Shiyou^1,2; (1.School of Geographical Sciences, Southwest University, Chongqing 400715, China; 2.Key Laboratory of Eco-Environment in the Three-Gorge Reservoir Region, Ministry of Education, Southwest University, Chongqing 400715, China)

Keywords:: net primary productivity(NPP); Yangtze River Basin; driving factors; Geodetector

CLC:: Q948

DOI:: -

Abstract:: Vegetation net primary productivity(NPP)plays an important role in evaluating vegetation growth, terrestrial ecosystem quality, and resource and environmental monitoring. Based on MODIS NPP data from 2000 to 2015 and together with DEM data, meteorological data and land use data, we examined the spatiotemporal characteristics of vegetation NPP in the Yangtze River Basin and explored the contribution rate of each driving factor by using trend analysis, correlation analysis and geographic detector modeling methods. The results indicate that:(1)the overall NPP of vegetation in the basin was increasing slowly with the range from 478.4 gC/(m²·a)to 547.4 gC/(m²·a)and an average of 516.5 gC/(m²·a);(2)the NPP value in the basin decreased from southeast to northwest and remained unchanged in most areas during the past 16 years, in which the obvious increase appeared in the western part of Diqing Prefecture of Yunnan Province and Bijie City of Guizhou Province, and the decrease mainly occurred in the eastern part of Guizhou Province;(3)NPP of vegetation in the study area was positively correlated with temperature and precipitation, and with increasing altitude, the NPP of vegetation increased initially and then started to a drop, reached to the summit in the altitude range of 2 000～3 500 m and concentrated in the Hengduan Mountain region; the contribution of NPP of the region with a slope less than 15 degrees to NPP value of this study area was the highest; the area of forest land was the largest, and the average NPP of the forests was the highest;(4)the contribution of each factor to NPP decreased in the order: altitude>temperature>precipitation>land-use>slope; altitude as single factor had the greatest influence on NPP, while the interaction of altitude and temperature had even more significant effect. These results can provide data support for ecological restoration and help maintain sustainable development of the Yangtze River Basin.

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Last Update: 2022-02-20