Pattern of Wintering Bird Community in Three Habitats after Invasion of Spartina alterniflora in Yancheng National Nature Reserve
Invasive plant species (Spartina alterniflora) was introduced to the coastal wetlands and competed with the native species,which resulted in the coexistence of native plants and invasive plant communities.A comparative study on the patterns of bird communities in three vegetation habitats contributed to evaluate the effects of plant invasion on the bird communities.From mid-November 2014 to late February 2015,bird species richness,numbers,the bird feeding behavior and base were investigated in the three plant habitats in the south of the central area of the Yancheng National Nature Reserve.The results showed that a total of 39 bird species were recorded in these habitats,the evenness index,Shannon-Wiener diversity index and Simpson diversity index in the habitats of Phragmites australis,Suaeda glauca and Spartina alterniflora communities decreased successively.The results of Jaccard similarity analysis demonstrated that bird communities were remarkably similar between habitat of Spartina alterniflora community and ecotone of Spartina alterniflora community and Phragmites australis community;those were moderately dissimilar between habitat of Phragmites australis community and habitat of Spartina alterniflora community,and habitat of Suaeda glauca community;those were not similar between habitats of Suaeda glauca community and Spartina alterniflora community.Eight species of birds such as Vinous-throated Parrotbill (Paradoxornis webbianus) could be used as the indicator species in the habitats respectively.Bird species could be clustered into 6 groups on the 40％ of the rest information,and species could be divided into 3 groups on axis 1 of the detrended correspondence analysis.The results showed that bird community composition was different in different habitats,and different habitats had obvious indicator species respectively,there was a link between the feeding structures of bird community and the space resources in the habitats.The local plants of Suaeda salsa community played an important role during the wintering period of many rare birds,but due to the competition between Phragmites australis community and Spartina alterniflora community,the area of Suaeda salsa community was gradually reduced,so protection and restoration of Suaeda salsa community habitat was urgently needed.
NETL
NSTL
万方数据
维普
