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首页> 外文期刊>Marine ecology >Chemical defenses against generalist fish predators and fouling organisms in two invasive ahermatypic corals in the genus Tubastraea
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Chemical defenses against generalist fish predators and fouling organisms in two invasive ahermatypic corals in the genus Tubastraea

机译：对杜巴属两个侵入性放血珊瑚中的通体鱼类捕食者和结垢生物的化学防御

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摘要

The introduction of exotic marine species has caused considerable economic and ecological damage around the world. Some of these species possess adaptations such as secondary metabolites which facilitate their successful invasion into new areas. In this study we tested two hypotheses: (ⅰ) crude extracts produced by two invasive hard corals Tubastraea coccinea and Tubastraea tagusensis, introduced to the southwest Atlantic, inhibit predation by generalist fish; (ⅱ) substances found in the crude extracts of both species reduce or enhance the settlement of other organisms. In an in situ palatability bioassay the extract of T. tagusensis reduced predation by generalist fish. The extracts of both species of coral showed species-specific effects on fouling organisms in in situ gel plate bioassays. Control and extract plates had similar total cover, although plates with extracts had significantly fewer Cladophora sp., and Lithophyllum sp. was only detected on control gels. In contrast, a hydrozoan was only found on plates with extracts and overall community ordination demonstrated clear differences in the fouling communities between treatments. These results demonstrate that both coral species have chemical substances which can bring about a negative interaction with potential fish predators and competitors such as algal and invertebrate foulers and the advantage gained could explain their success in invading new regions to the detriment of local fauna and flora.
机译：外来海洋物种的引进在世界范围内造成了相当大的经济和生态破坏。这些物种中的一些具有适应性，例如次级代谢产物，其有助于它们成功地入侵新区域。在这项研究中，我们测试了两个假设：（ⅰ）由两种侵入性硬珊瑚Tubastraea coccinea和Tubastraea tagusensis产生的粗提物，被引入西南大西洋，抑制了通才鱼的捕食。 （ⅱ）在两个物种的粗提物中发现的物质都会减少或增强其他生物的沉降。在原位适口性生物测定中，塔格霍斯锥虫的提取物减少了通才鱼的捕食。在原位凝胶平板生物测定中，两种珊瑚的提取物对结垢生物均表现出物种特异性作用。对照板和提取板的总覆盖率相似，尽管含有提取物的板的Cladophora sp。和Lithophyllum sp。明显较少。仅在对照凝胶上检测到。相比之下，只在带有提取物的板上发现了水生动物，整个群落的排序显示处理之间结垢群落的明显差异。这些结果表明，这两种珊瑚都含有化学物质，它们可能与潜在的鱼类捕食者和竞争对手（例如藻类和无脊椎动物犯规者）产生负面影响，所获得的优势可以解释它们在入侵新地区方面的成功，从而损害了当地动植物。

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  • 来源
    《Marine ecology》 |2010年第3期|P.473-482|共10页
  • 作者

    Bruno G. Lages; Beatriz G. Fleury; Angelo C. Pinto; Joel C. Creed;

  • 作者单位

    Programa de Pos-Graduacao em Ecologia e Evolucao, Universidade do Estado do Rio de Janeiro - UERJ, PHLC Sala 224, Rua Sao Francisco Xavier 524, 20.559-900 Rio de Janeiro, RJ, Brazil;

    rnDepartamento de Ecologia, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro - UERJ, PHLC Sala 220, Rua Sao Francisco Xavier 524, 20.559-900 Rio de Janeiro, RJ, Brazil;

    rnDepartamento de Quimica Organica, Instituto de Quimica, Universidade Federal do Rio de Janeiro - UFRJ, Bloco A, CT, Avenida Athos da Silve-ira Ramos 149, 21.941-909 Rio de Janeiro, RJ, Brazil;

    rnDepartamento de Ecologia, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro - UERJ, PHLC Sala 220, Rua Sao Francisco Xavier 524, 20.559-900 Rio de Janeiro, RJ, Brazil;

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  • 正文语种 eng
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  • 关键词

    antifouling; chemical defense; introduced species; predation; tubastraea coccinea; tubastraea tagusensis;

    机译：防污化学防御引进物种;掠夺大球藻塔格木;

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