Analysis of Spatiotemporal Evolution Characteristics and Driving Factors of NPP in Guizhou Province, China

IF 2.3 2区生物学 Q2 ECOLOGY

Ecology and Evolution Pub Date : 2025-10-02 DOI:10.1002/ece3.72231

Bo Xie, Yi Liu, Han Fan, Mingming Zhang

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Abstract

Karst ecosystems are ecologically fragile and highly sensitive to climate change. This study explored the spatiotemporal changes and driving mechanisms of net primary productivity (NPP) in Guizhou Province, a typical karst region in Southwest China, from 2000 to 2020. By integrating multisource geospatial datasets, we employed comprehensive spatiotemporal analytical methods including Sen + Mann-Kendall trend analysis, Hurst index, and coefficient of variation, complemented by correlation analysis and the geographic detector modeling. Key findings reveal: (1) A significant upward trend in NPP with an interannual variation of 3.65 g C m⁻² a⁻¹ and a multiyear average of 785.47 g C m⁻² a⁻¹; (2) Distinct spatial heterogeneity showing southern high-value zones contrasting with lower values in northern, eastern, and western regions, with 45.76% of areas demonstrating significant positive NPP trends; the overall volatility is stable; (3) Driving mechanism analysis identifies precipitation, soil moisture, and population density as dominant factors, with anthropogenic influences exhibiting increasing temporal dominance.

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贵州省NPP时空演变特征及驱动因素分析

喀斯特生态系统生态脆弱，对气候变化高度敏感。研究了2000 - 2020年中国西南典型喀斯特地区贵州省净初级生产力（NPP）的时空变化特征及其驱动机制。在整合多源地理空间数据的基础上，采用Sen + Mann-Kendall趋势分析、Hurst指数、变异系数等综合时空分析方法，并辅以相关分析和地理探测器模型。结果表明：(1)NPP呈显著上升趋势，年际变化为3.65 g C m−2 A−1，多年平均值为785.47 g C m−2 A−1；(2)空间异质性明显，呈现南部高值区与北部、东部和西部低值区对比，有45.76%的地区呈现显著的正NPP趋势；整体波动稳定；(3)驱动机制分析表明，降水、土壤湿度和人口密度是主要影响因子，人类活动影响的时间支配性逐渐增强。

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来源期刊

Ecology and Evolution ECOLOGY-

CiteScore

4.40

自引率

3.80%

发文量

1027

审稿时长

3-6 weeks

期刊介绍： Ecology and Evolution is the peer reviewed journal for rapid dissemination of research in all areas of ecology, evolution and conservation science. The journal gives priority to quality research reports, theoretical or empirical, that develop our understanding of organisms and their diversity, interactions between them, and the natural environment. Ecology and Evolution gives prompt and equal consideration to papers reporting theoretical, experimental, applied and descriptive work in terrestrial and aquatic environments. The journal will consider submissions across taxa in areas including but not limited to micro and macro ecological and evolutionary processes, characteristics of and interactions between individuals, populations, communities and the environment, physiological responses to environmental change, population genetics and phylogenetics, relatedness and kin selection, life histories, systematics and taxonomy, conservation genetics, extinction, speciation, adaption, behaviour, biodiversity, species abundance, macroecology, population and ecosystem dynamics, and conservation policy.