廊道效应:杭州行道树带鸟类群落研究

Corridor Effects: Studies on Bird Communities among the Street ’free Strips in Hangzhou

行道树带在城市景观中属于绿色廊道。鸟类如何利用这些绿色廊道?哪些因素影响鸟类利用廊道?为了了解城市行道树带的结构与鸟类利用的关系,我们对杭州行道树带鸟类群落进行了调查。对于每一行道树带,我们选取并调查了8个栖息地结构内参数、3个城市化人为干扰参数、6个城市景观结构参数等共计17个栖息地参数;观察分析了鸟类在取食、夜宿和扩散方面对行道树带的利用程度,以及鸟类群落多样性和物种分布与行道树带栖息地结构的关系。结果显示,城市行道树带在鸟类城市景观栖息地中具有多方面的生态功能,它为生活在城市地区的鸟类提供了夜宿和取食场所,为部分鸟类在城区的扩散提供了通道。树种多样性水平和行道树带的连通性可提高行道树带的生态功能,而周围的建筑用地、行人和车辆的干扰则会导致行道树带生态功能的降低。

Street tree strips are the major green corridors in urban landscape.How birds use these corridors and what might influence birds'usage of them?To answer these questions,wc selected 30 street tree strips in Hangzhou as the samples.For each sample strip,we investigated 17 habitat parameters,bird usage behaviors,and bird richness and densities.Then we analyzed the relationships between bird community patterns and the structures of street tree strips.The results showed that street tree strips had extensive ecological functions.They served birds not only as the roosting and feeding sites,but also the corridor of movement Its ecological functions increased with increasing of tree species diversity and connectivity of street tree strips,decreased with the increasing of the proportion of building around and disturbance of human and vehicles.