Bird communities of Northern forests : Patterns of diversity and abundance
Bird communities of Northern forests : Patterns of diversity and abundance
复制标题
北部森林的鸟类群落：多样性和丰富度的模式
DOI：
10.2307/1369152
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Tallchief A. Comet
中科院分区：
文献类型：
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作者：
M. Willson;Tallchief A. Comet
1992-1994年在阿拉斯加东南部和邻近的加拿大进行的调查表明，落叶林中的日间鸟类群落有时比针叶林中的多样性和丰度更高。然而，在每一个广泛的植被类型和年之间的变化掩盖了任何一般模式。此外，森林类型之间的稀疏曲线没有差异，并且北美西部落叶林和针叶林群落之间更广泛的比较在幅度和方向上都是可变的。因此，很少有证据表明西部和北方落叶林的鸟类群落有更大的多样性的总趋势。极北地区的落叶林和针叶林在地质学上都很年轻，有证据表明，落叶林中至少可能没有饱和的鸟类。某些物种失踪或从其他地方的针叶树栖息地转移到我们地区的落叶栖息地。沿海岛屿与针叶林和大陆补丁落叶栖息地支持约尽可能多的物种，预计从个人的数量。少数鸟类物种在每个站点的社区占主导地位，但优势物种的位置之间有很大差异。沿海和内陆森林的比例相似性低，除了在北端的内通道，这支持沿海和内陆森林的物种特征的位置。落叶林和针叶林群落组成的相似性也很低，特别是在沿海地区。
Diurnal bird communities in Southeast Alaska and adjacent Canada, censused in 1992-1994, sometimes had higher diversity and abundance in deciduous than coniferous forest. However, variation within each broad vegetation type and among years obscured any general pattern. Furthermore, rarefaction curves did not differ between forest types and a wider comparison between the communities of deciduous and coniferous forests in western North America was variable in both magnitude and direction. Thus, there is little evidence for a general trend toward greater diversity in bird communities of western and northern deciduous forests. Both deciduous and coniferous forests of the far north are geologically young, and there was some evidence that deciduous forest, at least, may not be saturated with bird species. Certain species were missing or shifted from conifer habitat elsewhere to deciduous habitat in our area. Coastal islands with coniferous forest and mainland patches of deciduous habitat supported about as many species as expected from the number of individuals present. A small number of bird species dominated the community at each site, but the dominant species differed considerably among locations. Proportional similarity of coastal and interior forest was low, except for locations at the north end of the Inside Passage, which supported species characteristic of both coastal and interior forests. The similarity of community composition in deciduous and coniferous stands was also low, especially on the coast.