【摘要】 为了探讨样线法和样点法对盐沼湿地鸟类调查的有效性及适用性,我们于2008年3–5月采用固定距离样线法和固定半径样点法对崇明东滩盐沼鸟类进行了调查。5次调查共记录到鸟类24种,其中样线法记录到19种,样点法记录到21种,两种调查方法平均每次记录到的鸟类种数没有显著差异,表明两种方法对盐沼鸟类种类的发现能力相似。两种方法得到的鸟类密度之间有显著的相关性,说明两种方法在反映鸟类群落中每种鸟类的相对数量方面具有可比性。但除了仅在一种调查方法中记录到的种类,样点法调查得到的每种鸟类密度和鸟类总密度均高于样线法的调查结果。因此,在对鸟类种群或群落的时空特征进行比较时,需要考虑所采用的调查方法对调查结果的影响。更多还原

【Abstract】 We compared fixed-distance line transect and fixed-radius point count surveys for estimating saltmarsh bird richness and abundance at Chongming Dongtan.A total of 24 bird species were recorded during five surveys in spring 2008,19 during line transects and 21 during point counts.The average number of species detected per survey did not differ between the two methods.Density estimates of individual species from the two methods were correlated,suggesting that the two methods consistently estimate relative abundance.However,density of individual species and of all species combined as estimated by point count surveys were higher than those by line transect surveys.Our results indicate that it is important to account for different survey methods when comparing temporal and spatial differences in bird species richness and abundance.更多还原