ORIGINAL RESEARCH
Analysis of Spatial and Temporal Changes
and Drivers of NPP in Vegetation Ecosystems
in Guizhou, China, in the Last 20 Years
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1
School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang 500025, China
2
The Second Surveying and Mapping Institute of Guizhou Province, Guiyang 500025, China
Submission date: 2024-04-16
Final revision date: 2024-08-15
Acceptance date: 2024-08-23
Online publication date: 2024-10-29
Publication date: 2025-11-04
Corresponding author
Guangbin Yang
School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang 500025, China
Pol. J. Environ. Stud. 2025;34(6):6791-6804
KEYWORDS
TOPICS
ABSTRACT
As important manifestations of ecosystem function, clarifying the relationships among regional
net primary productivity (NPP), climate change, and human activities is an urgent topic to explore
in the context of global climate change and the "dual-carbon" strategy. On the basis of Moderate
Resolution Imaging Spectroradiometer (MODIS) NPP data and meteorological and land cover data, we
quantitatively investigated the spatial and temporal changes in NPP in different vegetated ecosystems
in Guizhou Province and their responses to the driving factors via Theil–Sen trend, multiple linear
regression, and correlation analyses. The results revealed that (1) spatially, the area of Guizhou Province
where NPP showed an increasing trend accounted for 51.44%, which was much larger than the area where
the decreasing trend accounted for 6.42%. Temporally, the NPP in Guizhou Province showed a fluctuating
increasing trend, with a rate of 3.65 gC/(m2·a). Under the influence of climate change and human activities,
the NPP of all ecosystems showed a fluctuating increasing trend, among which the grassland ecosystem
presented the most significant increasing trend in NPP, with a rate of 5.91 gC/(m2·a). (2) Climate change
has had a dual effect on NPP in Guizhou Province, but the overall effect has been one of facilitation.
Among the factors, temperature and precipitation were positively correlated with NPP at percentages
of 82.83% and 72.8%, respectively, with a greater facilitating effect than an inhibitory effect. Sunshine
hours and relative humidity were negatively correlated with NPP, accounting for 67.9% and 53.39% of the
area, respectively, and the inhibitory effect was slightly greater than the promotional effect. Among the
ecosystems in Guizhou, farmland ecosystems were the most significantly affected by climate change. (3)
Human activities played a dual role in NPP in Guizhou, but their overall role was that of facilitation. The
transformation of forestland and cropland was the main factor influencing the increase in NPP. Among the
ecosystems in Guizhou, grassland ecosystems were the most significantly affected by human activities.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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