2008年雪灾之后三峡库区红腹锦鸡种群动态

Population Dynamics of the Golden Pheasant (Chrysolophus pictus) in the Three Gorges Reservoir Area after the Snow Calamity in 2008

为了评估2008年罕见雪灾对三峡库区野生动物的影响程度,选择国家Ⅱ级重点保护野生动物红腹锦鸡作为研究对象,采用鸣叫计数法,在库区选定以往年份进行过32个样点调查的6个区域进行重复调查。结果表明,雪灾之后库区红腹锦鸡繁殖期占区雄鸟种群密度降低到35.11%,生境质量对红腹锦鸡种群存活率表现出明显差异。大面积人工营造的日本落叶松纯林生境中存活率最低(6.30%),自然更新且人类活动影响程度较低的落叶阔叶+针阔混交林以及落叶常绿阔叶混交林生境中存活率较高(54.66%～91.36%)。

From the end of March to the early of June after an exceptionally serious snow disaster occurred in January 2008,a survey was conducted upon the population dynamics of the territorial male bird during the breeding season of the Golden Pheasant（Chrysolophus pictus）in the Three Gorges Reservoir Area.The investigation was carried out in six sampling zones（32 sample plots）that was the same places in which we did the same type of investigation in the previous years.With comparison with the previous data,the result showed that the population density had declined to 35.11% on an average.The habitat quality significantly affected the survival rate of the golden pheasant,which was the lowest（6.30%）in the habitat formed by large-scale artificial pure forest of Larix kaempferi,whereas the survival rate was relatively higher to the highest（54.66%～91.36%）in the natural secondary mixed forest formed by the deciduous broad-leaved forest ＋ theropencedrymion,and the mixed deciduous and evergreen broad-leaf forest.