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海南植被净初级生产力时空分布特征研究 预览

Study on the spatial-temporal variation characteristics of vegetation net primary productivity in Hainan province
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摘要 海南是一个相对独立地理单元,生态环境优越,植被NPP是判定生态系统健康状况和可持续发展水平的重要指标。基于2000—2015年海南省MODIS NPP数据集,采用趋势线分析法和相关分析法对海南被净初级生产力时空分布特征研究。结果表明:(1)2000—2015年海南省植被净初级生产力(NPP)呈现整体微弱的上升趋势,植被年平均NPP变化范围为794.5—998.3 gC·m^-2,年平均值886.2 gC·m^-2。(2)从空间分布看,海南2000—2015年平均NPP分布呈现中高四周低的趋势,其中年平均NPP>1000 gC·m^-2主要分布在海南的中部山区,年平均NPP<600 gC·m^-2区域主要分布在海南的西部和北部的海岸带附近。(3)其中气候变化和人类活动是NPP变化的主要驱动因素,但在不同区域影响的因子的影响程度存在差异。以上研究可为海南生态环境保护和评估提供参考。 Hainan,separated from mainland by the Qiongzhou Strait,is an isolated and southernmost province of China featured with a characterized ecological environment.Vegetation net primary production(NPP)is an important indicator to evaluate the health status and the ecosystem sustainable development level.Based on the MODIS NPP data set covering Hainan Province from the year of 2000 to 2015,the temporal and spatial distribution features of net primary productivity(NPP)in Hainan Province were studied by using trend line analysis and correlation analysis.The results showed that:(1)The net primary productivity(NPP)of vegetation in Hainan Province was on a weak upward trend.The annual average NPP ranged from 794.5 to 998.3 gC·m^-2,with an average annual value of 886.2 gC·m^-2.(2)The average NPP spatial distribution of Hainan was on an increasing trend in the middle mountain,while on a decreasing trend in the coast;the annual average NPP>1000 gC·m^-2 was mainly distributed in the central mountainous areas of Hainan,while the annual average NPP<600 gC·m^-2 was mainly distributed in the western and northern coastal zones.(3)Climate change and human activities were the main driving factors of NPP change,but there were differences impact in different regions.The above research would provide reference for ecological environment protection and assessment in Hainan Province.
作者 刘少军 李伟光 陈小敏 佟金鹤 LIU Shaojun;LI Weiguang;CHEN Xiaomin;TONG Jinhe(Hainan Institute of Meteorological Sciences/Key Laboratory of South China Sea Meteorological Disaster Prevention and Mitigation of Hainan Province,Haikou 570203,China)
出处 《生态科学》 CSCD 2019年第5期52-57,共6页 ECOLOGICAL SCIENCE
基金 国家自然科学基金(41765007,41465005,41265007,41675113) 海南省自然基金项目(20154172,409005)。
关键词 植被 净初级生产力 时空分布 海南 vegetation net primary productivity spatial-temporal Hainan
作者简介 通信作者:刘少军(1980—),男,湖北天门人,博士,正研高工,主要从事生态遥感应用研究,E-mail:cdutlsj@163.com。
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