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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Effects of native macroalgae and predators on survival, condition and growth of non-indigenous Pacific oysters (Crassostrea gigas)
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Effects of native macroalgae and predators on survival, condition and growth of non-indigenous Pacific oysters (Crassostrea gigas)

机译：本地大型藻类和捕食者对非本地太平洋牡蛎（Crassostrea gigas）生存，状况和生长的影响

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摘要

Biological invasions by non-indigenous species are causing widespread environmental changes and can threaten biodiversity and ecosystem services. Biotic interactions can play a key role in promoting or inhibiting spread of non-indigenous species. The Pacific oyster (Crassostrea gigas Thunberg, 1793) is commonly found on intertidal shores with hard substrata, but is negatively associated with macroalgae and may be influenced by the macroalgae itself or by predators associated with it. The influence of macroalgae and predation on growth, condition and survival of juvenile Pacific oysters were tested in a field experiment at two intertidal boulder shores using hatchery-reared juvenile oysters deployed on ceramic tiles. After 10 months, condition of oysters was not significantly decreased in the presence of macroalgal canopy. At one site growth was reduced by macroalgae and at the other, it tended to be enhanced, but the effect was not significant. An effect of predation could not be detected. Although spatial variation in survival and growth of juvenile oysters was found, the results suggest that pre-settlement processes and/or post-settlement processes acting upon juvenile oysters at sizes not tested in this study might better explain variation in abundance of Pacific oysters in intertidal habitats.
机译：非土著物种的生物入侵正在引起广泛的环境变化，并可能威胁生物多样性和生态系统服务。生物相互作用可以在促进或抑制非本地物种扩散中发挥关键作用。太平洋牡蛎（Crassostrea gigas Thunberg，1793年）通常在潮间带硬质基质的海岸上发现，但与大型藻类呈负相关，并可能受到大型藻类本身或与之相关的捕食者的影响。大型藻类和捕食对太平洋生牡蛎生长，状况和生存的影响是在两个潮间巨石海岸的实地试验中进行的，使用的是孵化场养殖的牡蛎，它们部署在瓷砖上。 10个月后，在存在大型藻类冠层的情况下，牡蛎的状况没有明显降低。在一个地点，大型藻类减少了生长，而在另一个地点，则倾向于增加，但效果并不明显。无法检测到掠食的影响。尽管发现了牡蛎生存和生长的空间变化，但结果表明，未进行本研究测试的未成熟牡蛎的定居前过程和/或沉降后过程可能更好地解释了潮间带太平洋牡蛎丰度的变化。栖息地。

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  • 作者

    Judith Kochmann; Tasman P. Crowe;

  • 作者单位

    School of Biology and Environmental Science, Science Centre West, University College Dublin, Belfield, Dublin 4, Ireland,Biodiversity and Climate Research Centre (BiK-F), Senckenberg Gesellschaft fuer Naturforschung (SGN), Goethe-University (GU), Senckenberganlage 25, 60325 Frankfurt am Main, Germany;

    School of Biology and Environmental Science, Science Centre West, University College Dublin, Belfield, Dublin 4, Ireland;

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  • 正文语种 eng
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  • 关键词

    Biotic resistance; Crassostrea gigas; Macroalgae; Predation; Condition index;

    机译：生物抗性;Crassostrea gigas;大型藻类;捕食条件指数;

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