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首页> 外文学位 >The influence of trophic interactions, habitat complexity, and landscape setting on community dynamics and restoration of oyster reefs.
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The influence of trophic interactions, habitat complexity, and landscape setting on community dynamics and restoration of oyster reefs.

机译：营养相互作用，生境复杂性和景观设置对群落动态和牡蛎礁恢复的影响。

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摘要

Debate over the prevalence of strong top predator effects such as trophic cascades within more complex and diverse terrestrial and marine systems continues to be a focal point of community ecology. However, integration of how habitat complexity influences predator-prey interactions and the strength of trophic cascades into effective management schemes of these systems remains limited. This disconnect between community ecology and ecosystem management hampers our ability to sustain ecosystem goods and services associated with intact habitats. Experimental manipulation of habitat complexity and predator regimes within oyster reef communities determined that habitat complexity disrupted or attenuated the strength of component interactions of atrophic cascade. Yet predator avoidance behavior by intermediate predators, mud crabs, reinforced the indirect benefit of toadfish on juvenile oysters, including on complex reefs where toadfish were ineffective at removing mud crabs. Restoration of oyster reef habitat was conducted to investigate the importance of reef presence, landscape setting, and temporal variability for interactions among predator fish, juvenile fish, and resident and transient invertebrates. Patterns of fish and resident invertebrate utilization of oyster reef habitat are largely influenced by the landscape setting in which a reef is located; therefore, managers conducting reef restoration should consider the ecological consequences of restoration site selection to insure provision of intended ecosystem goods and services. Finally, review of available data on fish densities on oyster reef and unstructured bottom habitats was used to quantify the amount of augmented fish production created per unit area of restored oyster reef habitat. This set of analyses and calculations revealed that every 10 m2 of newly constructed oyster reef in the southeast United States is expected to yield a benefit of an additional 2.6 kg of production of fish and large mobile crustaceans per year for the functional lifetime of the reef. Applying the findings of empirical investigations to our understanding of ecological systems and developing methods to quantify ecosystem functions will augment the efficiency with which habitat restoration efforts recover and sustain important ecosystem goods and services.
机译：强烈的顶级捕食者效应（例如在更复杂和多样的陆地和海洋系统中的营养级联反应）的流行之争仍然是社区生态学的重点。然而，将栖息地复杂性如何影响捕食者与猎物之间的相互作用以及营养级联的强度整合到这些系统的有效管理方案中仍然是有限的。社区生态与生态系统管理之间的这种脱节阻碍了我们维持与完整栖息地相关的生态系统商品和服务的能力。对牡蛎礁群落内的栖息地复杂性和捕食者制度进行的实验性操作确定，栖息地复杂性破坏或削弱了萎缩级联反应的相互作用强度。然而，中间掠食者泥蟹的捕食回避行为增强了蟾蜍对少年牡蛎的间接好处，包括在蟾蜍无法有效去除泥蟹的复杂礁石上。牡蛎礁栖息地的恢复进行了调查，以调查礁存在，景观设置和时间变化对于捕食鱼，幼鱼，居住和过渡无脊椎动物之间的相互作用的重要性。牡蛎礁栖息地的鱼类形态和居民对无脊椎动物的利用在很大程度上受到珊瑚礁所处景观的影响。因此，进行礁石恢复的管理人员应考虑选择恢复地点的生态后果，以确保提供预期的生态系统产品和服务。最后，回顾了牡蛎礁和非结构化底部生境的鱼类密度的可用数据，以量化每单位面积恢复的牡蛎礁生境所创造的增产鱼类数量。这组分析和计算结果表明，美国东南部每新建10 m 2 牡蛎礁，预计每年将额外增加2.6千克鱼和大型甲壳类动物的产量延长珊瑚礁的使用寿命。将实证调查的结果应用于我们对生态系统的理解和开发方法以量化生态系统功能，将提高栖息地恢复工作恢复和维持重要的生态系统商品和服务的效率。

著录项

  • 作者

    Grabowski, Jonathan Henry.;

  • 作者单位

    The University of North Carolina at Chapel Hill.;

  • 授予单位 The University of North Carolina at Chapel Hill.;
  • 学科 Biology Ecology.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 155 p.
  • 总页数 155
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 生态学（生物生态学）;
  • 关键词

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