Wintering Waterfowl Distribution at Paddy Fields in Wetland Park and Their Habitat Characteristics
Paddy fields are an important part of constructed wetland in China,and exploring the management mode of paddy fields in winter is of great significance to the protection of waterfowl diversity and the improvement of their habitats in wetland.From December 2017 to February 2018 and November 2018,the waterfowl population was investigated using belt transect method at the winter fallow area for water storage and at traditional paddy field in Tianfu National Wetland Park,and the waterfowl population and their habitat characteristics at the two sites are also compared.The results show that:1)In the winter fallow area for water storage,25 species of waterfowl in 4 orders and 7 families are recorded,of which cormorants,herons and geese and ducks account for 36%,28%and 24%,respectively,while 10 species in 3 orders and 5 families are found in the traditional paddy field wetland,of which cormorants and herons take up 30%,respectively,and no geese and ducks are recorded;2)The diversity and species richness of waterfowls in the winter fallow area for water storage are higher,with the significant increase in dominant population of waterfowls.Its diversity index of Shannon-Wiener(1.64)is higher than that of traditional paddy fields(1.50),the uniformity index of waterfowls(0.84)is lower than that of traditional paddy fields(1.37),and the similarity coefficient is 0.51;and 3)The water surface area,water level,food and vegetation coverage of the winter fallow area for water storage are important factors affecting the increase of waterfowl species,and nesting site and stop point are also factors affecting the inhabitation of waterfowls in winter.Therefore,adopting fallow management for water storage in winter would play a positive role in the conservation and improvement of biodiversity.
paddy fieldwinter fallow area for water storagewintering waterfowlhabitat,Tianfu National Wetland Park
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万方数据
