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首页> 外文期刊>Estuarine Coastal and Shelf Science >The role of geomorphology in the distribution of intertidal rocky macroalgae in the NE Atlantic region
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The role of geomorphology in the distribution of intertidal rocky macroalgae in the NE Atlantic region

机译：地貌学在东北大西洋地区潮间带岩石巨藻分布中的作用

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It is known that rocky macroalgae distribution depends on several abiotic factors, but little attention has been given to geomorphological influences. This paper analysed the relation between geomorphological variables (active processes, coastal morphology, coastal orientation and lithology) and rocky intertidal macroalgae species at a local scale. Thirteen sites were sampled along the coast of Cantabria (North Spain) in order to obtain covers of macroalgae species. Multivariate analysis and logistic regression were applied, predicting the probability occurrence of macroalgae species as a response to the predictor geomorphological variables. Our results showed that coastal morphology and coastal orientation were the principal geomorphological factors explaining the structure of macroalgae communities. The most significant differences in substrate preferences were found between Bifurcaria bifurcata, that appears in wave-cut platforms oriented towards the east, and Corallina officinalis/Ellisolandia elongata and Gelidium spinosum, which are found in cliffs oriented towards the north and west. Although these variables help to characterise species distribution, their predictive value is still limited, possibly due to other factors influencing macroalgae. Thus, some of the geomorphological variables studied here are among the environmental factors that determined the distribution of intertidal macroalgae communities at a local scale, even if not always in a direct way. (C) 2015 Elsevier Ltd. All rights reserved.
机译：众所周知，岩石巨藻的分布取决于几种非生物因素，但很少关注地貌影响。本文分析了地貌尺度变量（活动过程，海岸形态，海岸方向和岩性）与岩石潮间带大型藻类物种之间的关系。沿坎塔布里亚（西班牙北部）海岸采样了13个地点，以获取大型藻类的覆盖。应用多变量分析和逻辑回归，预测大型藻类物种发生的概率，作为对预测地貌变量的响应。我们的研究结果表明，沿海形态和沿海方位是解释大型藻类群落结构的主要地貌因素。底物偏好的最显着差异是在出现在向东的切波平台中出现的Bifurcaria bifurcata与在朝北和向西的悬崖中发现的Corallina officinalis / Ellisolandia elongata和Gelidium spinosum之间。尽管这些变量有助于表征物种分布，但其预测价值仍然有限，这可能是由于其他影响大型藻类的因素所致。因此，这里研究的某些地貌变量是决定潮间带大型藻类群落在当地尺度上分布的环境因素之一，即使并非总是直接地。 （C）2015 Elsevier Ltd.保留所有权利。

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