Bird Community Diversity Of Ecological Restoration In Xiatanwei Coastal Wetland

As a special sea-land connection area,coastal wetlands have a high ecological service function.In order to delay or contain the threat of rapid degradation of coastal wetland ecosystems to regional biodiversity,coastal wetland ecological restoration has become an important means of restoration.The monitoring and protection of bird diversity in coastal wetland ecological restoration has become one of the key issues.The Xiatanwei Coastal Wetland Ecological Restoration Project is located on the north side of Xiang'an District,Xiamen.The restoration goal is mainly to build a coastal mangrove landscape and protect bird diversity.This research is based on the results of 1 year-long survey of birds in the Xiatanwei coastal wetland restoration area from October 2018 to September 2019,and remote sensing images of different tide levels in this region in 2019,interpreting and analyzing the main landscape types and the spatial distribution pattern of the landscape,combined with the analysis results of bird species,number and temporal dynamics.A total of 62 species of 26 families and 11 orders of birds were recorded in this study.Among them,herons and plovers have a larger number and more species.In terms of the monthly variation of bird communities,it was found that the number of bird species peaked in spring and autumn throughout the year,and the peak of bird numbers occurred in May.The research results of the landscape pattern at different tide levels indicate that the coastal wetland landscape in Xiatanwei has periodic changes at low and high tide levels,and the construction landscape divides the mangrove,tidal flat and sea surface landscape,and the single coastal landscape caused by the construction of the hardened embankment.There are large differences in bird species and numbers in different landscapes.Herons are distributed in a variety of landscape types to stop at high tide.When low tide is mainly foraging in tidal flat landscapes,there are many egrets,accounting for about 74%of the number of birds in the landscape.egrets will also use the mangrove landscape for breeding.The low tide level of shorebirds is affected by the fragmentation of tidal flat landscapes.There are many types of tidal flat landscapes but few in number.The high tidal levels are distributed in the high tide bare land landscape and some construction landscapes.The research found that fragmentation of some landscape,there were too few landscapes suitable for shorebirds to stop at high tide,more human interference at low tide,and seasonal changes in bird communities.It is proposed to further optimize the restoration project planning from the aspects of seasonal resource management,reasonable planning of artificial landscapes,targeted bird protection measures,continuous bird monitoring and protection.It has certain reference value for improving the planning and management level of bird diversity protection in the Xiatanwei coastal wetland restoration project.