青藏高原生态屏障区生态系统服务权衡与协同关系
朱殿珍, 初 磊, 马 帅, 王良杰, 张金池

(南京林业大学 南方现代林业协同创新中心/江苏省水土保持与生态修复重点实验室, 南京 210037)

生态系统服务; 时空变化; 权衡与协同; 青藏高原生态屏障区

Tradeoff and Synergistic Relationship Among Ecosystem Services
ZHU Dianzhen, CHU Lei, MA Shuai, WANG Liangjie, ZHANG Jinchi

(Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration/Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China)

ecosystem services; spatiotemporal variation; tradeoff and synergies; Qinghai-Tibet Plateau ecological barrier

备注

为了开展多种生态系统服务的可持续管理决策,厘清生态系统服务权衡与协同关系是重要的前提。以青藏高原生态屏障区为对象,采用土地利用数据、土壤数据、气象数据和DEM数据,分析了2000—2015年土壤保持、水源涵养和碳储量服务的时空变化,识别了3种生态系统服务供给热点区,并分析了不同生态系统服务权衡与协同关系。结果表明:(1)青藏高原生态屏障区3种生态系统服务土壤保持、水源涵养和碳储量服务在空间上均表现为由东南向西北减少的趋势;(2)2000—2015年水源涵养和土壤保持服务呈现下降趋势,减少量分别为95.27 mm和1 081.38 t/hm2,碳储量呈现增加趋势,增加量为25.77 g C/m2;(3)研究区1类和2类热点区面积减少,3类热点区以及非热点区面积增加,林地提供3种服务的能力强于草地;(4)在空间上,2000—2015年这3种生态系统服务两两之间的协同关系在变强,具体表现为相关系数的增加。在时间上,3种生态系统服务两两之间的协同关系在变弱,具体表现为相关系数的减少。研究区3种生态系统服务在时空上存在不同的变化趋势; 各服务间存在显著的协同关系,且随着时空变化协同关系也存在强弱变化。
In order to make sustainable management decisions for multiple ecosystem services, it is important to clarify the relationship between ecosystem service tradeoffs and synergies. In this study, the spatiotemporal variations of soil conservation, water yield, carbon sequestration were analyzed using land use and land cover(LULC), soil types, meteorology, and DEM datasets in the Qinghai-Tibet Plateau Ecological barrier area of China. In addition, we identified hot spots for three ecosystem services supplies, and explored the tradeoff and synergistic among three ecosystem services. The results showed that:(1)the soil conservation, water yield and carbon storage all showed a decreasing trend from southeast to northwest;(2)from 2000 to 2015, water yield and soil conservation showed a downward trend with a decrease of 95.27 mm and 1 081.38 t/hm2, while an increasing trend of carbon storage was found with an increases of 25.77 g C/m2;(3)the area of the first and second type hot spot decreased, while the area of the third type hot spot and non-hot spot increased; forest provided stronger ecosystem services than those of grassland in the study area;(4)from 2000 to 2015, in terms of space, the synergy between the three ecosystem services was getting stronger, which was reflected by the increase of correlation coefficients; according to timelines, the mutual relationships among the three ecosystem services were weakening, showing a decrease in correlation coefficients.The spatiotemporal variation trends of the three ecosystem services in the study area were different. There were the significant synergies among services, and there was also strong and weak change with spatiotemporal variation.