Research Unit "Phycology, Blue Biodiversity and Biotechnology," Department of Biology, Faculty of Sciences, University of Chouaib Doukkali, El Jadida, Morocco.
CCMAR - Centre of Marine Sciences, University of Algarve, Faro, Portugal.
Environ Sci Pollut Res Int. 2020 Oct;27(28):35501-35514. doi: 10.1007/s11356-020-09851-5. Epub 2020 Jun 27.
Epifaunal assemblages inhabiting the non-indigenous macroalga Sargassum muticum (Yendo) Fensholt were investigated on two physically distinct intertidal rocky (S1) and sandy (S2) sites along the Atlantic coast of Morocco. The objective of this study was to test whether the habitat-forming marine alga S. muticum invasive in these sites supported different epifaunal assemblages under different environmental conditions and through time. The gastropods Steromphala umbilicalis, S. pennanti, and Rissoa parva and the isopod Dynamene bidentata were the most contributive species to the dissimilarity of epifaunal assemblage structure between both sites throughout seasons. SIMPER analysis showed a dissimilarity of 58.3-78.5% in the associated species composition of S. muticum between study sites with respect to sampling season. Species diversity and total abundance were significantly higher at the rocky site compared to the sandy site. PERMANOVA analyses showed significant differences of associated epifaunal assemblage structure for the season and site interaction. Accordingly, site and season were determinant factors conditioning the role of habitat in structuring epifaunal assemblages.
本研究调查了栖息在两种不同物理性质的潮间带岩石（S1）和沙质（S2）生境中的非本地大型海藻马尾藻（Sargassum muticum）上的附生生物群落。本研究的目的是测试在不同的环境条件和时间下，作为生境形成的海洋藻类马尾藻是否支持这些地点的不同附生生物群落。腹足纲的 Steromphala umbilicalis、S. pennanti 和 Rissoa parva 以及等足类动物 Dynamene bidentata 是两个地点整个季节之间附生生物群落结构差异的最主要贡献物种。SIMPER 分析表明，在研究季节内，两个研究地点之间的马尾藻相关物种组成存在 58.3-78.5%的差异。与沙质生境相比，岩石生境的物种多样性和总丰度显著更高。PERMANOVA 分析表明，相关附生生物群落结构在季节和地点相互作用方面存在显著差异。因此，地点和季节是决定生境在构建附生生物群落结构中的作用的决定性因素。
