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首页> 外文期刊>Estuarine Coastal and Shelf Science >Habitat traits and patterns of abundance of the purple sea urchin, Paracentrotus lividus (Lamarck, 1816), at multiple scales along the north Portuguese coast
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Habitat traits and patterns of abundance of the purple sea urchin, Paracentrotus lividus (Lamarck, 1816), at multiple scales along the north Portuguese coast

机译：葡萄牙北部沿海多尺度的紫色海胆Paracentrotus lividus（Lamarck，1816）的栖息地特征和丰富模式

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摘要

Spatial and temporal patterns of abundance and distribution of sea urchins (Paracentrotus lividus) from intertidal rockpools of the north Portuguese coast were examined in relation to physical (surface, altitude, depth, topographic complexity and exposure) and biological (substrate cover by dominant organisms) habitat traits. The methodology was based on a multi-factorial design where the total number and the abundance of urchins in each of six size classes were sampled over a range of spatial scales, from 10s of cm to kms, and a temporal scale of five months. The results highlighted three main features of the studied system: (1) the largest proportion of variability of sea urchins occurred at the smallest scale examined; (2) urchins from different size classes showed different patterns of abundance in relation to habitat traits; (3) variables normally invoked as potential drivers of distribution of urchins at a range of scales, such as hydrodynamics and shore height, were relatively less important than other abiotic (i.e. pool area, pool mean depth calculated over five replicate measures and sand cover) and biological (i.e. space occupancy by the reef-forming polychaete Sabellaria alveolata and mussels vs. availability of bare rock) variables to provide a considerable contribution to the variability of sea urchins. Intertidal populations of sea urchins are abundant on many rocky shores, where they are socially and economically important as food resource and ecologically key as habitat modelers. This study provides new clues on relatively unstudied populations, with relevant implications for possible management decisions, including the implementation of protection schemes able to preserve the main recruitment, settlement and development areas of P. lividus. (C) 2015 Published by Elsevier Ltd.
机译：研究了葡萄牙北部沿海潮间岩池中海胆（Paracentrotus lividus）的丰度和分布的时空分布，涉及物理（表面，高度，深度，地形复杂性和暴露）和生物学（优势生物的基质覆盖）生境特征。该方法是基于多因素设计的，其中六种尺寸类别中的海胆的总数和丰富度均在10厘米至公里的空间尺度范围内进行采样，时间尺度为5个月。结果突显了所研究系统的三个主要特征：（1）海胆可变性的最大比例发生在最小检验规模上； （2）不同大小等级的海胆相对于栖息地特征表现出不同的丰度模式； （3）通常作为变量在一系列尺度（例如水动力和海岸高度）上作为顽童分布的潜在驱动因素的变量，相对而言不如其他非生物生物重要（例如，池面积，通过五次重复测量计算出的池平均深度和沙覆盖）以及生物变量（即形成礁的多毛小球藻Sabellaria alveolata和贻贝的空间占用与裸露岩石的可利用性）对海胆可变性的贡献很大。在许多多岩石的海岸上，海胆的潮间带种群数量丰富，在这里，海胆作为食物资源在社会和经济上都很重要，在生态环境上作为栖息地建模者至关重要。这项研究为相对未被研究的人群提供了新的线索，对可能的管理决策具有相关的意义，包括实施能够保护青紫假蝇主要招募，定居和发展区域的保护计划。 （C）2015年由Elsevier Ltd.出版

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