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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Limited interspecific variation in grazing susceptibility of the brown alga Lobophora to herbivory
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Limited interspecific variation in grazing susceptibility of the brown alga Lobophora to herbivory

机译：利用棕榈藻叶片裂解到草食物的易感性有限的间隙变异

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摘要

The genus Lobophora is a notable benthic algal component of tropical coral reefs, capable of dominating large reef areas following coral mortality and herbivory declines. The alga, however, has been the object of contradictory observations in terms of susceptibility to herbivory. Unaware of the species-richness of this genus, most studies referred to Lobophora variegata, a species assumed to present various morphotypes and chemotypes, occupying diverse ecological niches. Variation in susceptibility to herbivory has been consequently interpreted as intraspecific variation in terms of morphology and chemical composition as well as differences in herbivore guild compositions and diet across different locations (e.g., habitat, reef, region). Recent taxonomic studies of Lobophora disclosed a high species diversity, which could explain previous conflicting observations. The present study tested the grazing susceptibility of seven species of Lobophora (L. dimorpha, L. hederacea, L. monticola, L. obscura, L. rosacea, L. sonderi and L. undulata), which differ in growth form as well as in their chemical composition and fine-scale ecological niche on coral reefs in the southern lagoon in New Caledonia, to two important herbivores in New Caledonia, the rabbitfish Siganus lineatus and the sea urchin Diadema setosum using tank, cage, and in situ experiments. All seven Lobophora species were markedly consumed in situ and by the two herbivores. Differences in consumption among the Lobophora species were small but statistically significant. Lobophora rosacea, characterized by a distinct secondary metabolome, was significantly more consumed by the two herbivores. Conversely, L. sonderi was always among the least consumed species. These results point to the possible role of chemical defense, and suggest that L. rosacea may produce less or different chemical deterrents than the other Lobophora species, and that L. sonderi may produce deterrents active over a wider range of herbivores. However, the limited interspecific differences in consumption point to the greater importance of associational and spatial refuges as defense strategies against herbivores over chemical or morphological defenses in the genus Lobophora.
机译：Lobophora属是热带珊瑚礁的值得注意的底栖藻类组分，能够在珊瑚死亡率和草食性下降后占据大型礁石地区。然而，在对草食病的易感性方面，藻类是矛盾观察的对象。没有意识到这种属的丰富性，大多数研究引用了Lobophora Variegata，该物种假设出现各种Morothypes和嗜胞型，占据各种生态龛。因此，对草食病易感性的变异被解释为形态学和化学成分的内部变异，以及在不同地点（例如栖息地，珊瑚礁，区域）的草食性公会组成和饮食中的差异。最近的Lobophora分类学研究披露了一种高物种多样性，可以解释以前的矛盾观察。本研究检测了七种Lobophora的放牧敏感性（L. Dimorpha，L. Hederacea，L. Monticola，L.Monticola，L.Scomura，L.Rosacea，L. undulata），其在生长形式以及在新喀里多尼亚南泻湖的珊瑚礁中的化学成分和细微生态利基，在新喀里多尼亚的两个重要食草动物，兔子西甘猴和海胆二迪玛集管，使用坦克，笼子和原位实验。所有七种Lobophora物种都是原位和两种食草动物的原位消耗。 Lobophora物种之间消耗的差异小而统计学意义。洛博洛拉罗西阿，其特征在于不同的次生代谢物，两种草本病变的消耗显着。相反，L. Sonderi总是在最少的食用物种中。这些结果指出了化学防御的可能作用，并表明L.Rosacea可能产生比其他洛多物种的较少或不同的化学威慑物，并且L.Sonderi可能会产生威慑活性在更广泛的食草动物上。然而，消费量有限的差异差异指向关联和空间难民作为在Lobophora属的化学或形态学中对食草缺陷的防御策略的重要性。

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  • 来源
    《Journal of Experimental Marine Biology and Ecology》 |2019年第9期|151175.1-151175.6|共6页
  • 作者

    Vieira Christophe; Stenger Pierre-Louis; Moleana Thibaud; De Clerck Olivier; Payri Claude;

  • 作者单位

    Univ Ghent Ctr Mol Phylogenet & Evolut Phycol Res Grp Krijgslaan 281 S8 B-9000 Ghent Belgium;

    Ctr Ifremer Pacif IFREMER UMR Ecosyst Insulaires Oceaniens 241 Labex Corail BP 49 F-98725 Tahiti French Polynesi France;

    Univ Nouvelle Caledonie Lab LIVE BP R4 Noumea 98851 New Caledonia|LABEX Corail BP R4 Noumea 98851 New Caledonia|Aqualagon SARL BP 2525 Mt Dare Noumea 98800 New Caledonia;

    Univ Ghent Ctr Mol Phylogenet & Evolut Phycol Res Grp Krijgslaan 281 S8 B-9000 Ghent Belgium;

    Inst Rech Dev LabEx CORAIL CNRS IRD UR UMR ENTROPIE BP A5 F-98848 Noumea Nouvelle Caledo France;

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

    Defense; Escape; Herbivory; Lobophora; Macroalgae;

    机译：防守;逃生;草食病;Lobophora;宏观格子;

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