The macrofauna of marine invertebrates of two photophilic algal communities on the Maresme coast (Barcelona, NE Spain) were studied. We evaluated how the type of algal substrate (soft or hard thallus algae) affects the distribution patterns of organisms living in them. Quantitative samples were collected in the months of October 2013 and February 2014 at 15-m depth by scraping standard surfaces of 400 cm². A total of 164 specific or supraspecific taxa were obtained and grouped into two categories: unitary and modular organisms. Of the 118 taxa of unitary organisms, a total of 4587 specimens were counted: 2029 were arthropods (44.2%), 1284 were polychaete annelids (27.9%), and 1080 were mollusks (23.54%). The unitary organisms were counted and weighed and were used for most of the statistical and biodiversity analyses. For the modular organisms, 46 different taxa belonging to Porifera, Hydrozoa, Bryozoa, and Tunicata were identified. Modular organisms were studied only at a qualitative level. In soft thallus algae, a greater abundance of epibiont invertebrates was found, but with lower biomass than in calcareous algae, while the latter showed a greater species richness and Shannon-Wiener index. In general, we can conclude that the nature (soft or hard thallus) and architecture (branched or crusted) of the macroalgae can limit the size and abundance of the epibiont invertebrates and can condition the populations of organisms that settle in them.

研究了Maresme海岸（西班牙内布拉斯加州）两个嗜藻藻类群落的海洋无脊椎动物大型动物。我们评估了藻类基质（软或硬藻类藻类）的类型如何影响其中生活的生物的分布方式。通过刮擦400 cm ^2的标准表面，在2013年10月和2014年2月的15 m深度收集了定量样品。总共获得了164种特异性或超特异性分类单元，并将其分为两类：单一生物和模块生物。在118种单一生物分类单元中，总共计数了4587个标本：2029个为节肢动物（44.2％），1284个为多壳类Annelids（27.9％）和1080个为软体动物（23.54％）。对单一生物进行计数和称重，并用于大多数统计和生物多样性分析。对于模块生物，鉴定了属于Porifera，Hydrozoa，Bryozoa和Tunicata的46种不同的分类单元。模块化生物仅在定性水平上进行了研究。在软的藻类藻类中，发现了更多的表生动物无脊椎动物，但生物质比钙质藻类要低，而钙质藻类的物种丰富度和香农-维纳指数更高。一般来说，