[1]LIU Heng,TANG Diwei,SONG Eping,et al.Spatiotemporal Dynamics of Vegetation Net Primary Productivity and Its Driving Factors in Wuling Mountainous Area During 2000-2015[J].Research of Soil and Water Conservation,2020,27(06):218-225.
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Spatiotemporal Dynamics of Vegetation Net Primary Productivity and Its Driving Factors in Wuling Mountainous Area During 2000-2015
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
218-225
Column:
目次
Public date:
2020-10-20
- Title:
- Spatiotemporal Dynamics of Vegetation Net Primary Productivity and Its Driving Factors in Wuling Mountainous Area During 2000-2015
- Keywords:
- net primary productivity; spatiotemporal dynamic; driving factors; Wuling Mountainous area
- CLC:
- Q948
- DOI:
- -
- Abstract:
- To reveal the spatiotemporal dynamic characteristics of vegetation net primary productivity(NPP)in the Wuling Mountainous area and to quantitatively identify the relevant driving factors and their influence, based on the MOD17A3 dataset from 2000 to 2015, the coefficient of variation, trend analysis, and Hurst index were used to analyze the NPP spatiotemporal dynamic characteristics and changing trends, and driving factors were analyzed from natural and man-made aspects using correlation analysis and geo-detector. The results showed that:(1)between 2000 and 2015, the vegetation NPP in the Wuling Mountainous area showed no significant decline trend as a whole, with great inter-annual fluctuation; evergreen coniferous forest and evergreen broad-leaved forest were the most productive vegetation. The spatial distribution pattern of NPP was high in the middle and low in the surrounding area; the trend of NPP over the 16 years had increased in the north and decreased in the south, and the future trend will be the main anti-continuity, and the NPP will increase;(2)in terms of driving factors, NPP was positively correlated with annual precipitation and average annual temperature, and the temperature was the main climate factor; NPP increased first and then decreased with the increase of elevation and slope; the conversion of cultivated land to forestland was the main conversion of NPP caused by land-use change;(3)influence level of factor decreased in the order: temperature>precipitation>elevation>land-use>slope, temperature, precipitation, and elevation were the dominant factors, slope and land-use were the important factors, and the influence of natural factors was stronger than that of human factors.
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Last Update:
2020-10-20