The spatiotemporal characteristics of vegetation variation on Hainan Island were explored with normalized difference vegetation index (NDVI) data from 2001 to 2016 on the basis of a regression-analysis method. The impact of climatic factors and human activities on vegetation variation was assessed in different climate regions by residual analysis. Our study indicated that vegetation regions with significant improvement were primarily located in the coastal part of the semi-arid, central semi-humid, central mountainous humid, and parts of the humid regions. More serious vegetation degradation was observed in the northern part of the semi-humid region, eastern parts of the humid region, and the southern semi-arid and semi-humid regions. The relationship of NDVI with precipitation was stronger than that with temperature in the humid and semi-arid regions, and drought was the critical factor influencing vegetation changes in the semi-arid region due to comprehensive actions of rising temperature and declining rainfall. The findings of residual analysis highlighted that the degradation of vegetation was mainly triggered by anthropogenic factors: the rapid development of urbanization in the northern part of the semi-humid, and the southern semi-arid and semi-humid regions, and excessive aquaculture in the eastern parts of the humid region. The results are expected to provide an effective foundation of formulating environmental and ecological sustainability policies on Hainan Island.

基于回归分析方法，利用归一化植被指数（NDVI）对2001〜2016年海南岛植被变化的时空特征进行了研究。通过残差分析评估了气候因子和人类活动对植被变化的影响。我们的研究表明，植被得到显着改善的地区主要位于半干旱的沿海地区，中部半湿润地区，中部山区湿润地区以及部分湿润地区。在半湿润地区的北部，湿润地区的东部以及南部半干旱和半湿润的地区观察到更为严重的植被退化。在湿润和半干旱地区，NDVI与降水的关系要强于温度，而干旱是由于温度上升和降雨减少的综合作用而成为影响半干旱地区植被变化的关键因素。残留分析的结果表明，植被的退化主要是由人为因素引起的：半湿润北部，南部半干旱和半湿润地区的城市化迅速发展，以及半湿润地区的过度水产养殖。潮湿地区的东部。预期结果将为制定海南岛的环境和生态可持续性政策提供有效的基础。由于温度升高和降雨减少的综合作用，干旱是影响半干旱地区植被变化的关键因素。残留分析的结果表明，植被的退化主要是由人为因素引起的：半湿润北部，南部半干旱和半湿润地区的城市化迅速发展，以及半湿润地区的过度水产养殖。潮湿地区的东部。预期结果将为制定海南岛的环境和生态可持续性政策提供有效的基础。由于温度升高和降雨减少的综合作用，干旱是影响半干旱地区植被变化的关键因素。残留分析的结果表明，植被的退化主要是由人为因素引起的：半湿润北部，南部半干旱和半湿润地区的城市化迅速发展，以及半湿润地区的过度水产养殖。潮湿地区的东部。预期结果将为制定海南岛的环境和生态可持续性政策提供有效的基础。半湿润地区北部，南部半干旱和半湿润地区的城市化发展迅速，湿润地区东部的水产养殖过度。预期结果将为制定海南岛的环境和生态可持续性政策提供有效的基础。半湿润地区北部，南部半干旱和半湿润地区的城市化发展迅速，湿润地区东部的水产养殖过度。预期结果将为制定海南岛的环境和生态可持续性政策提供有效的基础。