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首页> 外文期刊>Estuarine Coastal and Shelf Science >Spatial patterns of macrophyte composition and landscape along the rocky shores of the Mediterranean-Atlantic transition region (northern Alboran Sea)
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Spatial patterns of macrophyte composition and landscape along the rocky shores of the Mediterranean-Atlantic transition region (northern Alboran Sea)

机译：地中海-大西洋过渡地区（北阿尔伯兰海）多岩石海岸上大型植物组成和景观的空间格局

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摘要

The Alboran Sea is the westernmost ecoregion of the Mediterranean Sea. It is located in the vicinity of Strait of Gibraltar, the only natural connection of the Mediterranean Sea with global circulation. This ecoregion presents steep and highly variable environmental gradients, thus acting as a natural filter for Mediterranean and Atlantic species. This study aimed to analyse spatial patterns of littoral and upper sublittoral communities and their relationship with oceanographic conditions and coastal geomorphology, and to quantify littoral and upper sublittoral rocky shore communities at landscape scale. The results suggest that oceanographic conditions are the main factor to explain landscape patterns along the studied area, while geomorphological features should be related with local-scale variability. In this sense, three biogeographic subregions, matching with oceanographic patterns, were identified: western, central and eastern. These subregions showed significant differences in the structure and the composition of the littoral and upper sublittoral community, which can be explained by regional oceanographic dynamics. Posidonia oceanica, Cystoseira ericaefolia group and Mytilus spp. were the species that most contributed to landscape dissimilarity between the three subregions identified. The central oceanographic region, where the environmental conditions were more variable, showed the poorer and less differentiated flora, suggesting the existence of a divergent boundary between the Atlantic and the Mediterranean Sea. (C) 2015 Elsevier Ltd. All rights reserved.
机译：阿尔伯兰海（Alboran Sea）是地中海最西端的生态区。它位于直布罗陀海峡附近，直布罗陀海峡是地中海与全球环流的唯一天然连接。这个生态区域呈现出陡峭且高度变化的环境梯度，因此可以作为地中海和大西洋物种的天然过滤器。这项研究旨在分析沿海和沿海沿岸群落的空间格局及其与海洋条件和沿海地貌的关系，并在景观尺度上量化沿海和沿海沿岸岩质海岸群落。结果表明，海洋条件是解释研究区域景观格局的主要因素，而地貌特征应与当地尺度的变化有关。从这个意义上讲，确定了三个与海洋格局相匹配的生物地理分区：西部，中部和东部。这些次区域在沿海和沿海次沿海社区的结构和组成上显示出显着差异，这可以用区域海洋动力学来解释。大洋波塞德尼西亚（Posidonia oceanica），半绒藻（Cystoseira ericaefolia）组和Mytilus spp。是导致所确定的三个次区域之间景观差异最大的物种。环境条件多变的中部海洋学区域显示出较差，分化程度较低的植物区系，表明大西洋与地中海之间存在分界线。 （C）2015 Elsevier Ltd.保留所有权利。

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