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首页> 外文期刊>Marine ecology >The influence of boulder shape on the spatial distribution of crustose coralline algae (Corallinales, Rhodophyta)
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The influence of boulder shape on the spatial distribution of crustose coralline algae (Corallinales, Rhodophyta)

机译：巨石形状对地壳珊瑚藻（Corallinales，Rhodophyta）空间分布的影响

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摘要

Studies investigating the many ecologically and economically important species in benthic boulder habitats often use artificial boulders for determining species colonization. In some cases square-edged blocks are used that are shaped much differently than the ovoid or ‘round’ boulders often occurring naturally. Here it was tested if the shape of boulders affects the distribution across the boulder surface of crustose coralline algae (CCA), a taxon that strongly influences ecological dynamics in this habitat. The distance that CCA extends from the edge of boulders toward the centre of the underside was measured, and it was found that CCA extended further underneath boulders that were round-shaped compared with those that were block-shaped, probably because of light reaching further underneath round boulders. This result shows how at least one important taxon can be affected by variation in the shape of these boulders. Hypotheses being tested that use artificial substrata to model naturally occurring boulders should be carried out only in places where the artificial and naturally occurring boulders match physically.
机译：对底栖巨石生境中许多具有重要生态和经济意义的物种进行调查的研究通常使用人工巨石来确定物种的定殖。在某些情况下，所使用的方形块的形状与通常自然出现的卵形或“圆形”巨石形状大不相同。在这里测试了巨石的形状是否影响整个地壳的珊瑚状藻类（CCA）的分布，该类群严重影响了该栖息地的生态动态。测量了CCA从巨石边缘向底面中心延伸的距离，发现CCA在圆形巨石下方比在块状巨石下方延伸得更多，这可能是因为光线到达了下方圆石。该结果表明，这些巨石形状的变化如何影响至少一个重要的分类单元。使用人工基质模拟自然界巨石的假说只能在人工和自然界巨石物理匹配的地方进行。

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