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Spatial patterns of primary productivity derived from the Dynamic Habitat Indices predict patterns of species richness and distributions in the tropics.

机译：从动态生境指数得出的初级生产力的空间格局预测了热带地区物种丰富度和分布的格局。

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摘要

Humans are changing the Earth's ecosystems, which has profound consequences for biodiversity. To understand how species respond to these changes, biodiversity science requires accurate assessments of biodiversity. However, biodiversity assessments are still limited in tropical regions. The Dynamic Habitat Indices (DHIs), derived from satellite data, summarize dynamic patterns of annual primary productivity: (a) cumulative annual productivity, (b) minimum annual productivity, and (c) seasonal variation in productivity. The DHIs have been successfully used in temperate regions, but not yet in the tropics.;My goal was to evaluate the importance of primary productivity measured via the DHIs for assessing patterns of species richness and distributions in Thailand. First, I assessed the relationships between the DHIs and tropical bird species richness. I also evaluated the complementarity of the DHIs and topography, climate, latitudinal gradients, habitat heterogeneity, and habitat area in explaining bird species richness. I found that among three DHIs, cumulative annual productivity was the most important factor in explaining bird species richness and that the DHIs outperformed other environmental variables.;Second, I developed texture measures derive from DHI cumulative annual productivity, and compared them to habitat composition and fragmentation as predictors of tropical forest bird distributions. I found that adding texture measures to habitat composition and fragmentation models improved the prediction of tropical bird distributions, especially area- and edge-sensitive tropical forest bird species.;Third, I predicted the effects of trophic interactions between primary productivity, prey, and predators in relation to habitat connectivity for Indochinese tigers (Panthera tigris). I found that including trophic interactions improved habitat suitability models for tigers. However, tiger habitat is highly fragmented with few dispersal corridors. I also identified potential habitat patches and corridors that could serve as target sites for conservation.;In summary, my dissertation reveals the relationship between species diversity and dynamic patterns of primary productivity. The DHIs are effective measures to identify assess broad-scale patterns of biodiversity in tropical ecosystems, and assist conservation planning and resource management. My dissertation research contributes substantially to biodiversity science, and has broad societal relevance, in striving to protect biodiversity and the ecosystem services given rapid environmental changes.
机译：人类正在改变地球的生态系统，这对生物多样性产生了深远的影响。为了了解物种如何应对这些变化，生物多样性科学要求对生物多样性进行准确的评估。但是，热带地区的生物多样性评估仍然有限。从卫星数据得出的动态人居指数（DHI）总结了年度基本生产力的动态模式：（a）累积年度生产力，（b）最低年度生产力和（c）生产力的季节性变化。 DHI已在温带地区成功使用，但尚未在热带地区使用。我的目标是评估通过DHI测量的初级生产力对评估泰国物种丰富度和分布格局的重要性。首先，我评估了DHI与热带鸟类物种丰富度之间的关系。在解释鸟类物种丰富度时，我还评估了DHI与地形，气候，纬度梯度，栖息地异质性和栖息地面积的互补性。我发现在三个DHI中，累积年生产力是解释鸟类物种丰富度的最重要因素，并且DHI优于其他环境变量。碎片作为热带森林鸟类分布的预测因子。我发现在栖息地组成和碎片化模型中添加纹理度量可以改善对热带鸟类分布的预测，特别是对面积和边缘敏感的热带森林鸟类物种的预测。第三，我预测了初级生产力，猎物和捕食者之间的营养相互作用的影响。与印度支那虎（Panthera tigris）的栖息地连通性有关。我发现，包括营养相互作用可以改善老虎的栖息地适应性模型。但是，老虎的栖息地高度零散，几乎没有分散的走廊。我还确定了潜在的栖息地斑块和走廊，可以作为保护的目标地点。总之，我的论文揭示了物种多样性与初级生产力动态模式之间的关系。 DHI是有效的措施，可用于确定评估热带生态系统中生物多样性的广泛模式，并有助于保护规划和资源管理。我的论文研究对生物多样性科学做出了重大贡献，并且在环境快速变化的情况下努力保护生物多样性和生态系统服务具有广泛的社会意义。

著录项

  • 作者

    Suttidate, Naparat.;

  • 作者单位

    The University of Wisconsin - Madison.;

  • 授予单位 The University of Wisconsin - Madison.;
  • 学科 Ecology.;Remote sensing.;Conservation biology.;Zoology.;South Asian studies.
  • 学位 Ph.D.
  • 年度 2016
  • 页码 234 p.
  • 总页数 234
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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