Avian community composition associated with interactions between local and landscape habitat attributes
Avian community composition associated with interactions between local and landscape habitat attributes
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鸟类群落组成与当地和景观栖息地属性之间的相互作用相关
DOI：
10.1016/j.foreco.2014.04.011
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发表时间：
2014
影响因子：
3.7
通讯作者：
T. Wigley
中科院分区：
文献类型：
--
作者：
A. J. Kroll;You Ren;Jay E. Jones;Jack N Giovanini;R. W. Perry;Ronald E. Thill;Don White;T. Wigley
随着人类对生态系统产品需求的增加，用于商品生产的景观管理者需要关于管理制度对生物多样性的影响的信息。然而，景观属性可能会调节当地规模保护和管理行动的生态反应。因此，统一适用地方管理规定可能会产生不同的生物多样性反应。1995-1998年，我们研究了美国阿肯色州沃希托山脉当地栖息地结构和景观森林覆盖之间的相互作用如何与鸟类群落组成相关。我们使用贝叶斯分层模型估计占用63种繁殖鸟类，同时占变量检测从1941年时间上重复的点计数站收集的数据。具体而言，我们估计如何相互作用的四个当地的栖息地协变量（树冠覆盖的成熟针叶树和阔叶树，数量的障碍，灌木覆盖率）与比例的成熟阔叶林在景观尺度与物种占有率和丰富度。平均预测比较表明，障碍物计数和灌木覆盖与物种丰富度有最强的关联。四个当地森林覆盖变量中的每一个的估计关联在所有水平的景观森林覆盖中都是相似的，这表明这些当地措施和景观协变量之间的相互作用很弱或可以忽略不计。我们发现，我们的主要预测，当地/景观栖息地的相互作用将是最强的景观森林覆盖率低（1-20%）的支持。因此，我们建议森林管理者考虑处方，导致异质栖息地结构条件的广泛空间分布（例如，在林下植被覆盖和组成的变化），无论景观背景，以维持一个多样化的鸟类繁殖组合的景观在这个地区。
As human demand for ecosystem products increases, managers of landscapes used for commodity production require information about effects of management regimes on biological diversity. Landscape attributes, however, may moderate ecological responses to local-scale conservation and management actions. As a result, uniform application of local management prescriptions may yield variable biodiversity responses. We examined how interactions between local habitat structure and landscape forest cover were associated with avian community composition in the Ouachita Mountains, Arkansas, USA, 1995–1998. We used Bayesian hierarchical models to estimate occupancy for 63 breeding bird species, while accounting for variable detection with data collected from 1941 temporally replicated point count stations. Specifically, we estimated how interactions of four local habitat covariates (canopy cover of mature coniferous and hardwood trees, number of snags, and shrub cover) with percentage of mature hardwood forest at the landscape scale were associated with species occupancy and richness. Average predictive comparisons indicated that snag count and shrub cover had the strongest associations with species richness. Estimated associations for each of the four local forest cover variables was similar across all levels of landscape forest cover, suggesting weak or negligible interactions between these local measures and the landscape covariate. We found little support for our main prediction that local/landscape habitat interactions would be strongest at low levels of landscape forest cover (1–20%). Consequently, we suggest that forest managers consider prescriptions that result in a broad spatial distribution of heterogeneous habitat structural conditions (e.g., variation in understory cover and composition), irrespective of landscape context, to maintain a diverse avian breeding assemblage on landscapes in this region.