广东南岭生态功能区系统服务功能与人为扰动因素研究

Ecosystem Service Functions and Human Disturbance in Key Ecological Functional Zones in Nanling of Guangdong Province

基于MODIS系列数据、DEM数据、气象数据、土壤质地、土地利用数据等,以植被净初级生产力定量评价法计算了2000年、2017年广东省南岭重点生态功能区水源涵养、水土保护、生物多样性保持服务指数,并分析了人类扰动对生态系统服务功能的影响。结论如下:2000年、2017年南岭重点生态功能区内部单位面积植被净初级生产力及各项生态服务指数均明显优于功能区外部;与2000年相比,2017年研究区单位面积植被净初级生产力及各项服务指数均呈整体下降趋势,下降幅度为15.1%~22.8%,原因以人类活动影响为主;研究区内植被净初级生产力、水源涵养、水土保持、生物多样性保持服务指数呈上升趋势的区域面积占比分别为17.7%、22.0%、20.4%、0.7%,主要分布在龙川、兴宁、蕉岭、平远等区县;其他区域均呈不同程度的生态系统功能下降;研究区人类干扰指数与NPP及各类生态系统服务功能之间呈显著负相关,且2017年影响作用有所增强。

Based on MODIS data, DEM data, meteorological data, soil texture, land use data, the NPP quantitative evaluation method was used to calculate the ecosystem services of water conservation, soil and water conservation, and biodiversity conservation in the key ecological function area of Nanling, Guangdong Province in 2000 and 2017, and the impact of human disturbances on ecosystem services was analyzed. The conclusions are as follows: NPP and the ecological service indexes in the key ecological function areas of Nanling in the year of 2000 and 2017 are significantly better than those outside the functional area;compared with the year of 2000, the net primary productivity and service indexes in the study area showed an overall downward trend in 2017, which mainly due to human activities. The area ratio of NPP, water conservation, soil and water conservation, and biodiversity conservation service indexes showed an increasing trend are 17.7%, 22.0%, 20.4% and 0.7%, respectively, mainly distributed in Longchuan, Xingning, Jiaoling, Pingyuan;There is a significant negative correlation between the human disturbance indexes and NPP and ecosystem service functions in the study area, and the impact was enhanced in 2017.