摘要
NDVI时空演变研究有助于深入了解生态系统运行机制和环境变化响应过程,对于理解植被生长规律、保护生态环境和可持续发展具有重要意义.运用CiteSpace对收集的463篇样本文献,从文献数量分布、作者与机构、高下载被引及关键词共现、聚类时序、突现等角度展开可视化分析,结果显示:国内NDVI时空演变研究起步较晚,发展呈现明显阶段特征,大致可分初始萌芽期(2001-2006)、探索生成期(2007-2012)、稳步发展期(2013-2018)及高速增长期(2019至今);研究领域呈现出一核聚集、多点联系、大体分散的特征,尚未形成具有一定规模的核心作者群;高下载被引文献研究领域愈加丰富、影响力持续增强;时空变化、植被覆盖、气候变化、遥感等关键词为主要研究热点,前沿为响应、相关性、植被指数、物候、影响因素,聚焦于NDVI与气候变化、人类活动的关系研究及时空演变的模拟预测等方面.
Abstract
The study of the spatial and temporal evolution of NDVI helps to deeply under-stand the operation mechanism of the ecological system and the environmental change response pro-cess,which is important for understanding the law of vegetation growth,the protection of the ecologi-cal environment,and the sustainable development.Research from the perspective of objective measure-ment and knowledge map,using visualization tools CiteSpace,the CNKI search 463 sample literature,from the literature quantity distribution,the author and institutions,high download cited and keywords,cluster sequence,sudden visualization analysis,the results show:domestic NDVI time and space evolu-tion research started late,development present obvious stage characteristics,can roughly its initial Germ period(2001-2006),exploration generation period(2007-2012),steady development period(2013-2018)and rapid growth period(2019 to now);The research field is characterized by one-core aggregation,multi-point connection and general dispersion,without a core author group;the research field of increasing literature and increasing influence;Key words such as spatial and temporal change,vegetation coverage,climate change and remote sensing are the main research hotspots,while the fron-tier is response,correlation,vegetation index,phenology and influencing factors.It focuses on the pre-diction of the relationship between NDVI and climate change and human activities and the simulation of timely empty evolution..
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