上海崇明东滩震旦鸦雀冬季种群栖息地的生境选择

2008年11月-2009年3月,在崇明东滩对震旦鸦雀(Paradoxornis heudei)种群生态进行调查研究,并对震旦鸦雀种群和生境因子的相关性进行分析。运用单因素方差对互花米草(Spartina alterniflora)入侵和芦苇(Phragmites australis)收割造成的芦苇滩涂变化进行分析,并运用多元回归的方法对震旦鸦雀种群的密度和分布以及相关环境因子进行生境选择分析。结果表明,崇明东滩震旦鸦雀种群的密度为(5.08±3.11)只/hm2;震旦鸦雀种群的密度和芦苇直径呈极显著正相关,震旦鸦雀种群的分布和芦苇的高度、密度呈极显著正相关,和食物资源量呈显著正相关;互花米草和震旦鸦雀种群的密度和分布呈显著负相关;互花米草入侵和芦苇收割降低了震旦鸦雀越冬期的栖息地质量,保留一部分生长质量较好的芦苇可以缓解震旦鸦雀冬季种群的生存压力。

Research on the habitat-selection of Reed Parrotbill (Paradoxornis heudei) during the winter in Chongming Dongtan,Shanghai

From November 2008 to March 2009, an ecological investigation on the population of Reed Parrotbill (Paradoxornis heudei) was conducted in Chongming Dongtan, Shanghai. And during the study, a correlation analysis between the Reed Parrotbill population and environmental factors was undertaken. One-way ANOVA was used to analyze the impacts of smooth cordgarss (Spartina alterniflora) invasion and reed(Phragmites australis) harvesting on the distribution of Reed Parrotbill population and multi-regression analysis was used to analyze the relationship between the density, distribution of Reed Parrotbill and environmental factors. The results showed that the population density of Reed Parrotbill in Chongming Dongtan was (5.08±3.11)ind/hm2; the reed diameter positively correlated with density of Reed Parrotbill, the reed height and density had significantly positive impacts and food resource hold a positive impact to the distribution of Reed Parrotbill; smooth cordgrass had a negative impact to both density and the bird distribution. The habitat quality of Reed Parrotbill was on the decline due to the smooth cordgarss invasion and reed harvesting. Keeping some patches of reed in good growing condition could facilitate Reed Parrotbill wintering in Chongming Dongtan.