The study of ecosystem services and the comparison of trade-off and synergy in Yangtze River Basin and Yellow River Basin
FANG Lulu,, XU Dehua, WANG Lunche,, NIU Zigeng, ZHANG MingSchool of Geography and Information Engineering, China University of Geosciences, Wuhan 430074, China
Abstract The Yangtze River Basin and Yellow River Basin are important ecological barriers in China, which is of great significance to regional sustainable development. In recent decades, the human activities have changed the natural landscape of the two great river basins, which causes the destruction of ecosystem functions. Understanding the changes, interactions, and drivers of ecosystem services are critical for the improvement of ecosystem management in the above basins. Using the data of land use, NDVI, soil type and meteorology, this paper analyzed the spatial and temporal changes of vegetation net primary productivity (NPP), water yield (WY) and soil retention (SR) in the Yangtze and Yellow river basins from 2000 to 2016. The correlation analysis method was used to explore the trade-off and synergy between ecosystem services, and the constraint lines were extracted to compare the constraint effects between WY and SR in the above two basins. The results showed that: (1) From 2000 to 2016, the NPP in the two river basins increased at a rate of 3.21 gC/m2 and 3.92 gC/m2, respectively. In the Yangtze River Basin, WY increased at a rate of 1.25 mm/a and SR decreased at a rate of 55 t/hm2, while in the Yellow River Basin, WY decreased at a rate of 0.04 mm/a and SR increased at a rate of 3.31 t/hm2. (2) There was a synergistic relationship between NPP, WY and SR in the two basins. And the constraint line between NPP-WY and NPP-SR was hump-shaped constraint in the Yangtze River Basin. (3) In the Yellow River Basin, there was a convex-waved type constraint line between NPP and SR, and hump-shaped constraint line between NPP and WY, while there was an exponential relationship between WY and SR. Precipitation is the main factor influencing the constraint lines between ecosystem services. Still, quantitative research on ecosystem services in different watersheds and the influencing factors is of great significance for understanding and optimizing ecosystem services in different regions. Keywords:ecosystem services;trade-off and synergy;spatial and temporal variation;constrain line;Yangtze River Basin;Yellow River Basin
PDF (8326KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 方露露, 许德华, 王伦澈, 牛自耕, 张明. 长江、黄河流域生态系统服务变化及权衡协同关系研究. 地理研究[J], 2021, 40(3): 821-838 doi:10.11821/dlyj020200044 FANG Lulu, XU Dehua, WANG Lunche, NIU Zigeng, ZHANG Ming. The study of ecosystem services and the comparison of trade-off and synergy in Yangtze River Basin and Yellow River Basin. Geographical Research[J], 2021, 40(3): 821-838 doi:10.11821/dlyj020200044
式中:SC为土壤保持量(t/hm2),由潜在土壤侵蚀(Ap)与实际土壤侵蚀(Ar)之差决定;R为降雨侵蚀因子,本文受降雨过程资料限制,R值根据不同类型雨量资料进行估算和验证[36, 37];K为土壤可蚀性因子,采用1990年 Williams 等提出的侵蚀-生产力评价模型(EPIC)进行计算[38];LS为坡长坡度因子;C为植被覆盖和管理因子;P为土壤保持措施因子。模型中,P、C值是用于调节计算土壤保持量的实际偏差的固定值[39],见表1,因此参照美国农业部手册703号及相关文献来确定[40,41,42,43,44,45,46]。
Tab. 1 表1 表1不同土地利用类型P值和C值 Tab. 1P value and C value of different land use types
Fig. 10Comparison of potential evapotranspiration-water yield and rainfall erosivity-SR in the Yangtze River Basin and Yellow River Basin from 2000 to 2016
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