Land cover change induced effects on freshwater ecosystem services through a process-based perspective

Authors: Jingyu Lin*, , Jinliang Huang, Xiamen University
Topics: Land Use and Land Cover Change, Asia, Water Resources and Hydrology
Keywords: freshwater ecosystem services, Land cover change, watershed processes, water security
Session Type: Poster
Day: 4/13/2018
Start / End Time: 5:20 PM / 7:00 PM
Room: Napoleon Foyer/Common St. Corridor, Sheraton, 3rd Floor
Presentation File: Download

Land cover change is the significant driver of Freshwater Ecosystem Services (FWES) dynamics. Understanding how watershed land cover change effects on FWES is essential for local/regional water security. This study developed an analytical framework to perform processes-based analysis of land cover change induced effects on FWES (e.g. water yield, sediment retention, and water purification), then illustrate it in the Aojiang River watershed, which currently serves as the important drinking water source for the capital of Fujian province (Fuzhou) from 1991 to 2015. The results show that: 1) transformation from forest to built-up tends to accelerate across three intervals for both inside and outside freshwater reserves., the signal for forest conservation is stronger inside freshwater reserve whereas urbanization is more intensive for outside freshwater reserve. 2) spatiotemporal variations in FWES exhibit due to the spatial heterogeneous in watershed processes including water cycling soil erosion and nutrient fluxes mainly driven by land cover change inside and outside freshwater reserve (and the whole watershed) from 1991 to2015, 3) Spatial multi-scale relationships among FWES are characterized for managing FWES. This research demonstrates that dynamics of watershed processes associated with land cover change will affect FWES particularly inside freshwater reserve. The findings should be practical for local/regional water security, ecosystem resilience in similar watersheds, and River Chiefs in China.

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