Small isolated aspen stands enrich bird communities in southwestern ponderosa pine forests
Small isolated aspen stands enrich bird communities in southwestern ponderosa pine forests
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DOI：
10.1016/s0006-3207(02)00237-9
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发表时间：
2003-04-01
影响因子：
5.9
通讯作者：
Beier, P
中科院分区：
文献类型：
--
作者：
Griffis-Kyle, KL;Beier, P
小的白杨林分正在从西南部的景观中消失，所以了解它们对鸟类群落的贡献是很重要的。在1996年和1997年的繁殖季节，我们在亚利桑那州北方的黄松森林中的53个小的，孤立的白杨林和53对地块内的鸟类进行了采样。鸟类物种丰富度和丰度在白杨比松树。然而，鸟类物种丰富度和丰度并没有改变大小的白杨补丁或隔离指数。此外，直接排序的物种分布与栖息地因素表明没有明显的鸟类群落。这表明，白杨立场不港单独的人口，而是地方的区域鸟类达到高密度和丰富性，可能是至关重要的鸟类在资源稀缺的年份。因此，重要的是鸟类保护，以保持许多白杨站在整个景观，包括植被结构和组成的多样性。(C)2002爱思唯尔科技有限公司版权所有。
Small aspen stands are disappearing from the landscape in the Southwest, so it is important to understand their contribution to the avian community. We sampled birds in 53 small, isolated aspen stands and 53 paired plots within the ponderosa pine forest in northern Arizona, during the 1996 and 1997 breeding seasons. Bird species richness and abundance were higher in aspen than in pine. However, bird species richness and abundance did not vary with size of the aspen patch or isolation index. In addition, direct ordination of species distributions with habitat factors suggested no distinct avian communities. This suggests that aspen stands do not harbor separate populations, but rather are locations where the regional avifauna reaches high local density and richness and may be crucial to birds in years of resource scarcity. Thus it is important for avian conservation to maintain many aspen stands across the landscape, encompassing a diversity of vegetation structure and composition. (C) 2002 Elsevier Science Ltd. All rights reserved.