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滇桂黔石漠化片区植被净初级生产力时空分异研究

Temporal and spatial evolution characteristics of Net Primary Production in rocky desertification areas of Yunnan,Guangxi and Guizhou

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植被净初级生产力(net primary production,NPP)作为陆地生态系统碳循环的关键参数,其提升对于改善植被覆盖度、促进生态系统碳循环、推动区域可持续发展等具有重要意义.文章以重点生态功能区、特殊生态脆弱区——滇桂黔石漠化片区为研究区域,运用空间自相关和地理探测器等方法,分析NPP时空分异特征及其驱动因子,结果表明:①滇桂黔石漠化片区石漠化治理取得初步成效,但植被改善仍有较大提升空间.2000-2020年片区NPP均值由 2000 年的 878.99 gC/(m2·a)缓慢波动上升至 2020 年的 908.60 gC/(m2·a),年均仅提升 1.486 gC/(m2·a);②滇桂黔石漠化片区NPP均值空间格局相对稳定,但内部差异明显.总体维持西南较高、南部次之、北部较低的空间分异特征,整体依次对应云南片区、广西片区以及贵州片区;③滇桂黔石漠化片区NPP在空间分布上具有显著的正相关性,且相关性呈强化趋势.局域空间格局以高-高集聚型(HH)和低-低集聚型(LL)为主,高值区趋于集聚,低值区趋于相邻;④滇桂黔石漠化片区NPP时空分异格局是自然地理要素和社会经济要素共同作用的结果,其中降雨、气温和人口密度是主要影响因子.
As a key parameter of terrestrial ecosystem carbon cycle,the promotion of Net Primary Production(NPP)is of great significance for improving vegetation status,which facilitates ecosystem carbon cycle and regional sustainable development.Taking as the study areas the rocky desertification areas,special ecologically fragile areas in Yunnan,Guangxi and Guizhou,this paper explores the spatial and temporal evolution law,spatial pattern characteristics and driving factors of spatial differentiation of NPP based on the methods of linear regression,spatial autocorrelation and geographical detector.The results show that:①Preliminary success has been achieved in the control of rocky desertification in the rocky desertification areas of Yunnan,Guangxi and Guizhou,but there remains substantial potential for improvement in vegetation.From 2000 to 2020,the average NPP in the areas increased slowly from 878.99 gC/(m2·a)in 2000 to 908.60 gC/(m2·a)in 2020,with an annual average increase of only 1.486 gC/(m2·a);②The spatial pattern of NPP in the rocky desertification areas of Yunnan,Guangxi and Guizhou is relatively stable,but there are some obvious internal differences.In the study areas exist the spatial differentiation characteristics of being higher in southwest,second in south and lowest in north,which corresponds to Yunnan,Guangxi and Guizhou in turn;③The spatial distribution of NPP in the study areas shows a significant positive correlation that has a strengthening trend.The local spatial pattern is dominated by high-high(HH)and low-low(LL)concentrations,and NPP has the spatial characteristics that high-value areas tend to be concentrated and low-value areas tend to be adjacent;④The spatial-temporal differentiation pattern of NPP in the study areas is a result of the combined effects of natural geographic elements and socio-economic factors,with rainfalls,temperatures,and population densities being the primary influencing factors.

rocky desertification area in Yunnan,Guangxi and GuizhouNet Primary Production(NPP)temporal and spatial evolution characteristicsgeographic detector

许进龙、温雪、黄天能、罗贤涛、张河雄

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华中师范大学公共管理学院,湖北武汉 430071

广西财经学院海上丝绸之路与广西区域发展研究院,广西南宁 530004

广西财经学院经济与贸易学院,广西南宁 530004

滇桂黔石漠化片区 植被净初级生产力 时空分异特征 地理探测器

国家自然科学基金国家自然科学基金国家社会科学基金广西哲学社会科学规划研究课题广西哲学社会科学规划研究课题

723630014216104623XGL00623BYJ01223FMZ018

2024

10.7540/j.ynu.20230394

云南大学学报(自然科学版)
云南大学

云南大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.663
ISSN：0258-7971
年,卷(期)：2024.46(5)