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首页> 外文期刊>Southeastern naturalist >Early-Successional Breeding Bird Communities in Intensively Managed Pine Plantations: Influence of Vegetation Succession but Not Site Preparations
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Early-Successional Breeding Bird Communities in Intensively Managed Pine Plantations: Influence of Vegetation Succession but Not Site Preparations

机译：在集约经营的松树人工林中成功进行鸟类早期繁殖：植被演替的影响但未进行场地准备

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摘要

Birds that require early-successional habitat are declining in North America due to habitat loss. Their increasing reliance on anthropogenic landscapes, such as the extensive Pinus spp. (pine) plantations of the southeastern US, makes it important to assess how management alternatives within these forests influence habitat quality. We examined how 2 site preparation variables, tree row spacing (4.3 m vs. 6.1 m) and arrangement of post-harvest woody debris (piled vs. scattered), influenced species richness, abundance, and breeding activity of disturbance-dependent (early-successional) birds. We studied bird communities and vegetation structure during the first 5 years of growth on replicated plots in 4 intensively managed Pinus taeda (Loblolly Pine) plantations in Louisiana. We used model selection to determine which site-preparation and vegetation characteristics most influenced avian communities. All measures of bird communities responded positively as vegetation structure and cover increased over time. However, neither row spacing nor debris placement affected vegetation variables important to birds for at least for the first 5 years following stand establishment; bird communities responded to successional changes and variation among plots, but not to site preparation. Land managers seeking to provide early-successional habitat in recently established plantations for disturbance-dependent birds can do so by increasing structural complexity and groundcover through selective herbicide applications, mechanical treatments, or other means.
机译：由于栖息地的丧失，需要早期成功栖息地的鸟类在北美正在减少。它们越来越依赖于人为景观，例如广泛的松属。美国东南部的（松树）人工林使评估这些森林中的替代管理措施如何影响栖息地质量变得很重要。我们研究了2种场地准备变量，树行间距（4.3 m对6.1 m）和收获后木屑的排列方式（堆积与散落）如何影响物种的丰富度，丰度以及干扰相关（早期-继任者）。我们研究了路易斯安那州4个集约化管理的针叶松（Tausta taeda）种植园中复制地块上鸟类生长的最初5年中的鸟类群落和植被结构。我们使用模型选择来确定哪些场地准备和植被特征对鸟类群落的影响最大。随着时间的推移，鸟类群落的所有措施都随着植被结构和覆盖率的增加而积极响应。但是，行距和杂物放置都不会影响到至少在林分建立后的头五年内对鸟类重要的植被变量;鸟类群落对样地间的连续变化和变异做出了响应，但对场地准备没有响应。寻求在最近建立的人工林中为依赖干扰的鸟类提供早期成功栖息地的土地管理者，可以通过增加结构复杂性和选择性除草剂施用，机械处理或其他方式的地被覆盖来实现。

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