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首页> 外文期刊>Marine ecology progress series >Interactive effects of losing key grazers and ecosystem engineers vary with environmental context
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Interactive effects of losing key grazers and ecosystem engineers vary with environmental context

机译：失去主要放牧者和生态系统工程师的互动影响因环境而异

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摘要

Loss of biodiversity may cause significant changes to ecosystem structure and functioning. Evidence from long-term in situ removal experiments is rare but important in determining the effects of biodiversity loss against a background of environmental variation. Limpets and mussels are thought to be important in controlling community structure on wave-exposed shores in the UK: limpets as key grazers, mussels as ecosystem engineers. A long-term factorial removal experiment revealed interactive effects that varied between 2 shores in SW England. At one site (Harlyn), removing limpets caused a significant shift in community structure, but where limpets were lost, the presence or absence of mussels made little difference. Where limpets were present, however, the removal of mussels changed the structure and variability of the community. At the other site (Polzeath), the loss of mussels caused significant changes in community structure, and limpets played a less important role. At Harlyn, fucoid algae were abundant throughout the year. There were fewer algae at Polzeath, and cover was dominated by the summer bloom of ephemerals. At Harlyn, the limpets played a major role in controlling algae, but their effects were mediated by the presence of mussels. Other grazers were not able to fulfil their role. At Polzeath, mussels were far more important, and ephemeral algae grew on them regardless of the presence or loss of limpets. These findings emphasise the need to assess spatial and temporal variation in the effects of biodiversity loss and the importance of interactive effects of loss of multiple species from different functional groups.
机译：生物多样性的丧失可能导致生态系统结构和功能的重大变化。长期就地清除实验的证据很少，但对于确定环境变化背景下生物多样性丧失的影响很重要。人们认为，帽贝和贻贝对于控制英国波浪暴露海岸的社区结构非常重要：帽贝是主要的放牧者，贻贝是生态系统工程师。一项长期的析因去除实验表明，交互作用在英格兰西南部的两个海岸之间变化。在一个地点（哈林），去除帽贝会导致群落结构发生重大变化，但是在丢失帽贝的地方，贻贝的有无几乎没有什么不同。但是，在有帽贝的地方，贻贝的去除改变了群落的结构和变异性。在另一处（Polzeath），贻贝的流失引起了群落结构的重大变化，而帽贝起的作用较小。在哈林，岩藻藻全年丰富。 Polzeath的藻类数量减少，而盖草则以短暂的夏季开花为主。在哈林，帽贝在控制藻类中起着重要作用，但是它们的作用是由贻贝的存在介导的。其他放牧者无法履行其职责。在Polzeath，贻贝要重要得多，无论是否存在帽贝，淡海藻都在它们上面生长。这些发现强调需要评估生物多样性丧失影响的时空变化以及来自不同功能组的多种物种丧失相互作用的相互作用的重要性。

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  • 来源
    《Marine ecology progress series》 |2011年第26期|p.223-234|共12页
  • 作者

    Tasman P. Crowe; Natalie J. Frost; Stephen J. Hawkins;

  • 作者单位

    School of Biological Sciences, University of Southampton, Southampton SO16 7PX, UK,Present address: School of Biology and Environmental Science, University College Dublin, Belfield, Dublin 4, Ireland;

    School of Biological Sciences, University of Southampton, Southampton SO16 7PX, UK,ABP Marine Environmental Research, Suite B, Waterside House, Town Quay, Southampton SO14 2AQ, UK;

    School of Biological Sciences, University of Southampton, Southampton SO16 7PX, UK,Marine Biological Association of the UK, The Laboratory, Citadel Hill, Plymouth PL1 2PB, UK,School of Ocean Sciences, University of Wales Bangor, Menai Bridge, Anglesey LL59 5AB, UK;

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  • 正文语种 eng
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  • 关键词

    biodiversity; functional groups; spatial variation; long term; removal experiment; limpets; mussels; interactive effects;

    机译：生物多样性;功能组;空间变化长期;去除实验;帽贝;青口贝;互动效果;

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