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首页> 外文期刊>Estuarine Coastal and Shelf Science >Differences in composition of shallow-water marine benthic communities associated with two ophiolitic rock substrata
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Differences in composition of shallow-water marine benthic communities associated with two ophiolitic rock substrata

机译：与两个片石质岩层相关的浅海海洋底栖生物群落组成差异

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On marine rocky shores, several physical, chemical and biological processes operate to maintain the benthic assemblages' heterogeneity, but among the abiotic factors, the composition and texture of the rocky substrata have been only sporadically considered. However, biomineralogical studies have demonstrated an unsuspected ability of the benthic organisms to interact at different levels with rocky substrata. Therefore, the mineralogy of the substratum can affect the structure of benthic communities. To evaluate this hypothesis, the macrobenthic assemblages developed on two different ophiolitic rocks (serpentinites and metagabbros) in contact at a restricted stretch of the western Ligurian Riviera (western Mediterranean Sea), with identical environmental and climatic conditions, were analysed. Samplings were carried out at four bathymetric levels (+1m, 0m, -1m, and -3m respect to the mean sea level) and the analysis of the data evidenced differences in terms of species distribution and percent coverage. Algal communities growing on metagabbros were poorer in species richness and showed a much simpler structure when compared to the assemblages occurring on the serpentinites. The most widely distributed animal organism, the barnacle Chthamalus stellatus, was dominant on serpentinites, and virtually absent on metagabbros. Our results suggest a complex pattern of interactions between lithology and benthic organisms operating through processes of inhibition/facilitation related to the mineral properties of the substratum. (C) 2017 Elsevier Ltd. All rights reserved.
机译：在海洋多石的海岸上，通过几种物理，化学和生物过程来维持底栖组合的异质性，但在非生物因素中，仅偶尔考虑了岩石底层的组成和质地。然而，生物矿物学研究表明，底栖生物与岩石地下层在不同水平上相互作用的能力令人惊讶。因此，基底的矿物学可以影响底栖群落的结构。为了评估这一假设，分析了在两个利多里亚西部利古里亚里维埃拉（地中海南部）的有限伸展带上接触的两种不同的脂石质岩石（蛇纹岩和变辉岩）上形成的大型底栖动物组合，并具有相同的环境和气候条件。在四个测深级别（相对于平均海平面分别为+ 1m，0m，-1m和-3m）进行采样，对数据的分析表明，物种分布和覆盖率存在差异。与在蛇纹石上发生的组合相比，在异辉石上生长的藻类群落的物种丰富度较差，并且结构简单得多。分布最广的动物有机体，藤壶Chthamalus stellatus，在蛇纹石上占主导地位，而在变元蛇上几乎不存在。我们的结果表明，通过与基质的矿物特性有关的抑制/促进过程，岩性和底栖生物之间相互作用的复杂模式。 （C）2017 Elsevier Ltd.保留所有权利。

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