Data on bird abundance in urban woodlands in 32 Swedish cities

The expansion of urban areas is increasingly contributing to biodiversity declines. Several studies have analyzed the effect of increasing urbanization on bird diversity, but few have differentiated effects of urban landscapes (matrix) from changes in focal habitat quality at multiple spatial scales. In this study we analyzed the effect of urbanization on bird communities in individual (local scale) and across multiple (regional scale) cities while controlling for the quality of sampled natural habitats. We conducted bird point counts and habitat quality mapping of trees, dead wood and shrubs in 459 forest remnants along an urbanization gradient in 32 cities in Sweden. We then analyzed how the degree of urbanization affected species richness of woodland-breeding bird and red-listed bird species at a regional and local scale. We also analyzed how urbanization affected beta-diversity and dissimilarity between communities at the different spatial scales, and if dissimilarities in species c...

城市区域的扩张正日益加剧生物多样性的丧失。已有多项研究探讨了城市化水平提升对鸟类多样性的影响，但鲜有研究能够在多空间尺度下，区分城市景观基质（urban landscapes (matrix)）与目标生境质量变化各自产生的效应。本研究针对单个城市（局地尺度）及多个城市（区域尺度）的鸟类群落展开分析，同时控制采样自然生境的质量变量。我们在瑞典32个城市的城市化梯度带上，针对459处森林剩余斑块开展了鸟类样点调查（bird point counts），并对其中的乔木、枯木与灌丛开展生境质量制图。随后我们分析了城市化水平在区域与局地尺度上，对林栖繁殖鸟类及红色名录鸟类的物种丰富度的影响。此外，本研究还分析了不同空间尺度下，城市化对群落间β多样性（beta-diversity）及相异性的影响，以及物种组成的差异是否……