近20年海南岛植被生态质量变化特征分析

海南是国家生态文明试验区,是我国生态环境最好的省份之一.基于2000—2019年MODIS—NDVI海南岛植被覆盖度、植被净初级生产力、植被生态质量指数及地面气象观测资料,分析了海南岛植被生态质量变化情况以及气象条件对植被生态质量的影响.结果表明:2000年以来,海南岛植被生态质量指数呈增大趋势,植被生态质量整体向好....

Analysis on the change characteristics of vegetation ecological quality in Hainan Island in recent 20 years

Hainan is a national ecological civilization pilot zone and one of the best provinces in ecological environment in China.The spatial and temporal distribution of the fractional vegetation cover(FVC),net primary productivity(NPP),and vegetation ecological quality index,which were produced by using the MODIS normalized difference vegetation index(NDVI),and the impact of meteorological conditions on vegetation in Hainan Island from 2000 to 2019 were analyzed.The results show that since 2000,the vegetation ecological quality index of Hainan Island has shown an increasing trend.The average FVC of Hainan Island,which reached 75.4%in 2019,increased by 0.52%per year.The NPP,which was 1139.4 g·m^-2 in 2019,increased by 55.9 g·m^-2 every 10 years.In recent 20 years,the average value of the vegetation ecological quality index was 75.0.The changes of FVC and NPP were closely related to climate factors and human activities.This study shows that it is of great significance for improving the scientificity and timeliness of decision-making to monitor the vegetation ecological quality in Hainan Island using remote sensing.