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首页> 外文学位 >An examination of songbird avian diversity, abundance trends, and community composition in two endangered temperate ecosystems: Riparian willow habitat of the Greater Yellowstone ecosystem and a restored tallgrass prairie ecosystem, Neal Smith National Wildlife Refuge.
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An examination of songbird avian diversity, abundance trends, and community composition in two endangered temperate ecosystems: Riparian willow habitat of the Greater Yellowstone ecosystem and a restored tallgrass prairie ecosystem, Neal Smith National Wildlife Refuge.

机译：考察了两个濒临灭绝的温带生态系统中的鸣禽鸟类多样性，丰度趋势和群落组成：大黄石生态系统的河岸柳生境和恢复的高草草原生态系统，尼尔·史密斯国家野生动物保护区。

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摘要

One of the central issues in avian community ecology is an understanding of diversity patterns. The diversity of birds is especially important in endangered ecosystems because birds are good indicator species, and their presence could give conservation biologists and wildlife managers clues about the overall health of these systems. I studied the richness, abundance, and community composition of songbirds in two endangered ecosystems in temperate North America, riparian willow habitat of the Greater Yellowstone Ecosystem (GYE), and in a restored tallgrass prairie in central Iowa, Neal Smith National Wildlife Refuge (Neal Smith NWR). I was especially interested in the habitat variables across time and space that influenced avian diversity patterns in these two areas. It was also my goal to offer wildlife biologists and managers advice on how to maximize diversity in both endangered ecosystems. Finally, I wanted to emphasize the importance of analyzing flyover data (swallows used as a case study) in order to elucidate further questions about diversity in avian community and landscape ecology. Vegetation height and density were two important variables that help predict avian diversity in both the GYE and at Neal Smith NWR. The age of a restored prairie habitat and litter depth was also very important in shaping the community composition of birds in tallgrass prairies. However, birds respond to different variables in their habitat based on the varying life history characteristics across species (e.g. nesting and foraging preferences), and this makes it difficult to offer general suggestions on how to maximize avian diversity in any natural system. I recommend offering a variety of habitat types and structures in order to attract as many species as possible. It is also critically important to consider the habitat needs of the most endangered birds in each of these ecosystems. Avian biologists should continue to study diversity trends in various systems, and come to a clearer understanding of the specific habitat variables that most influence the richness, abundance, and community composition of birds (habitat features, climate change, patch size etc.).
机译：鸟类群落生态学的中心问题之一是对多样性模式的理解。鸟类的多样性在濒危的生态系统中尤为重要，因为鸟类是良好的指示物种，它们的存在可以为保护生物学家和野生动物管理者提供有关这些系统总体健康状况的线索。我研究了北美温带两个濒危生态系统，大黄石生态系统（GYE）的河岸柳生境以及爱荷华州中部恢复的高草大草原中两个濒临灭绝的生态系统中鸣鸟的丰富，丰富和群落组成，尼尔·史密斯国家野生动物保护区（尼尔Smith NWR）。我对跨越时空的栖息地变量特别感兴趣，这些变量影响了这两个地区的鸟类多样性模式。我的目标也是向野生生物生物学家和管理人员提供有关如何在两个濒危生态系统中实现最大多样性的建议。最后，我想强调分析飞越数据（以燕子为例）的重要性，以阐明有关鸟类群落多样性和景观生态学的更多问题。植被高度和密度是两个重要变量，可帮助预测GYE和Neal Smith NWR的鸟类多样性。恢复草原栖息地的年龄和垫料深度对于塑造高草草原鸟类的群落组成也非常重要。但是，鸟类会根据不同物种之间不同的生活史特征（例如筑巢和觅食偏好）对栖息地的不同变量做出反应，这使得很难就如何在任何自然系统中最大化鸟类多样性提出一般性建议。我建议提供各种栖息地类型和结构，以吸引尽可能多的物种。考虑到每个生态系统中最濒危鸟类的栖息地需求也至关重要。鸟类生物学家应继续研究各种系统中的多样性趋势，并更清楚地了解最能影响鸟类的丰富度，丰度和群落组成（栖息地特征，气候变化，斑块大小等）的特定栖息地变量。

著录项

  • 作者

    Olechnowski, Brian Frederick Maximilian.;

  • 作者单位

    Iowa State University.;

  • 授予单位 Iowa State University.;
  • 学科 Agriculture Wildlife Conservation.;Biology Ecology.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 141 p.
  • 总页数 141
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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