Beach is a common and vulnerable coastal ecosystem with huge ecological service functions.Due to the multiple impacts of climate change and human activities,beach ecosystem has been seriously damaged.Beach nour-ishment is an effective approach to prevent coastal erosion and improve the beach environment by using sand re-plenishment to restore beach morphology.Previous nourishments have often neglected the impacts on beach ecosys-tem.Many studies show that beach nourishment have multifaceted,multi-scale and complex impacts on beach eco-system.Based on reviewing previous researches,the compositions,characteristics and functions of beach ecosys-tem are summarized.The basic characteristics of beach ecological damage,the impact process and mechanism of beach nourishment on beach ecosystem at various scales are analyzed.Then,some adaptive measures for beach nourishment are suggested from the perspective of reducing negative ecological impacts,which would support coastal management and sustainable utilization of beach.
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