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首页> 外文期刊>Marine ecology progress series >Chemically mediated interactions between macroalgae Dictyota spp. and multiple life-history stages of the coral Porites astreoides
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Chemically mediated interactions between macroalgae Dictyota spp. and multiple life-history stages of the coral Porites astreoides

机译：大型藻类Dictyota spp之间的化学介导相互作用。和珊瑚多孔质石藻的多个生命历史阶段

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摘要

Competition between corals and macroalgae is often assumed to occur on reefs, especially those that have undergone shifts from coral to algal dominance; however, data examining these competitive interactions, especially during the early life-history stages of corals, are scarce. We conducted a series of field and outdoor seawater-table experiments to test the hypothesis that allelopathy (chemical inhibition) mediates interactions between 2 common brown macroalgae, Dictyota pulchella and D. pinnatifida, and the coral Porites astreoides at different life-history stages of the coral. D. pinnatifida significantly reduced larval survival and larval recruitment. The extracts of both D. pinnatifida and D. pulchella significantly reduced larval survival, and the extract of D. pulchella also negatively influenced larval recruitment. There was no measurable effect of the crude extracts from Dictyota spp. on the photophysiology of adult corals. Our results provide evidence that these Dictyota species chemically compete with P. astreoides by negatively affecting larval settlement and recruitment as well as the survival of larvae and new recruits. Macroalgae may perpetuate their dominance on degraded reefs by chemically inhibiting the process of coral recruitment.
机译：通常认为珊瑚和大型藻类之间的竞争是在珊瑚礁上发生的，特别是那些已经从珊瑚统治转变为藻类统治的珊瑚。但是，缺乏检验这些竞争性相互作用的数据，尤其是在珊瑚的生命历史早期阶段。我们进行了一系列的野外和室外海水实验，以检验以下假设：化感作用（化学抑制）介导了两种常见的棕色大型藻类（Dictyota pulchella和D. pinnatifida）与该珊瑚不同生命历史阶段的珊瑚多孔石之间的相互作用。珊瑚。 D. pinnatifida显着降低了幼虫的存活率和幼虫的募集。 D. pinnatifida和D. pulchella的提取物显着降低了幼虫的存活率，而D. pulchella的提取物也对幼虫的募集产生了负面影响。 Dictyota spp的粗提物没有可测量的作用。关于成年珊瑚的光生理学。我们的结果提供了证据，这些Dictyota物种通过消灭影响幼虫的沉降和募集以及幼虫和新兵的生存而与P. astreoides竞争。大型藻类可以通过化学抑制珊瑚募集的过程来保持其对退化珊瑚礁的主导地位。

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  • 来源
    《Marine ecology progress series》 |2011年第28期|p.161-170|共10页
  • 作者

    Valerie J. Paul; Ilsa B. Kuffner; Linda J. Walters; Raphael Ritson-Williams; Kevin S. Beach; Mikel A. Becerro;

  • 作者单位

    Smithsonian Marine Station at Fort Pierce, 701 Seaway Drive, Fort Pierce, Florida 34949, USA;

    US Geological Survey, St. Petersburg Coastal & Marine Science Center, 600 4th Street South, St. Petersburg, Florida 33701, USA;

    University of Central Florida, Department of Biology, 4000 Central Florida Blvd., Orlando, Florida 32816, USA;

    Smithsonian Marine Station at Fort Pierce, 701 Seaway Drive, Fort Pierce, Florida 34949, USA;

    University of Tampa, Department of Biology, 401 W Kennedy Blvd., Tampa, Florida 33606, USA;

    Smithsonian Marine Station at Fort Pierce, 701 Seaway Drive, Fort Pierce, Florida 34949, USA,Center for Advanced Studies (CEAB-CSIC), Acc Cala S Francesc 14, 17300 Blanes (Girona), Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    allelopathy; coral-algal interactions; dictyota; chemical defense; phase shift;

    机译：化感作用;珊瑚与藻类的相互作用;水藻;化学防御;相移;

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