Design and Restoration Assessment of Urban Lakeshore Based on Bird Habitat Requirements:A Case Study of Shuanggui Lake in Liangping
Anthropogenic interventions like excessive development and recreational activities resulted in the homogenization and degradation of lakeshore habitats and exerted negative impacts on bird survival and ecological service functions of lake wetlands.Taking Shuanggui National Wetland Park in Liangping District,Chongqing,for a case study,the study investigates the bird communities and their habitats 4 years later after the lakeshore restoration project began to be implemented in 2009,which focused on the coordinated design framework of"environmental elements-biological elements-structure",and quantifies the habitat characteristics using habitat mapping method.The results reveal that there are totally 49 bird species in the Shuanggui lakeshore,among which 45 species are observed in the experimental area and 22 in the control area;the Shannon-Wiener Index for birds is higher on the north shore(2.665)and the west shore(2.984)of the experimental area,compared to the east shore(2.563)in the control area.The west shore has a larger area of micro-wetland than the north shore,thereby with a more significant increase in both the variety and the population sizes of waterfowl species.There is a significant positive correlation between bird diversity and habitat diversity,as well as between bird abundance and habitat richness(P<0.01).It is concluded that the restoration project has effectively increased the diversity of bird habitat units,and construction of small and micro-wetlands and integrated"forest-grass-wetland"habitat pattern have continuously improved the lakeshore habitat heterogeneity and bird diversity.
urban lake wetlandlakeshorebird habitatbiodiversity
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万方数据
