The benthic communities dominated by the mussel Brachidontes rodriguezii (d’ Orbigny, 1846) are distributed in most of the rocky intertidal shores of temperate coastal areas of the SW Atlantic. The objective of this study was to review the changes that have placed in the intertidal zone of the mussel community over the past 50 years in Mar del Plata city (Buenos Aires Province, Argentina). From the original description (1966) of the community considered as a baseline, two anthropogenic agents were identified over time: (1) the introduction of non-indigenous species, and (2) the effect of the sewage pollution. Both agents impacted the benthic community, changing their vertical distribution, structure, and species composition. The belt barnacles formation in the upper intertidal zone and the reefs formed by the invader polychaete Boccardia proboscidea Hartman, 1940 were the main changes registered in the intertidal community. In the last 50 years, epilithic intertidal community results in a good indicator of anthropogenic pressures in the ecosystem of the SW Atlantic coastal area.

贻贝Brachidontes rodriguezii主宰的底栖生物群落（d'Orbigny，1846年）分布在西南大西洋温带沿海地区的大部分岩石潮间带。这项研究的目的是回顾过去50年间马德普拉塔市（阿根廷布宜诺斯艾利斯省）贻贝群落潮间带的变化。从最初作为社区基准的描述（1966年）中，随着时间的推移，确定了两种人为因素：（1）引入非本地物种，以及（2）污水污染的影响。两种媒介都影响了底栖生物群落，改变了它们的垂直分布，结构和物种组成。潮间带上层带状藤壶的形成和入侵的多毛类长波卡虫形成的珊瑚礁哈特曼，1940年是潮间带社区的主要变化。在过去的50年中，上石器潮间带群落很好地表明了西南大西洋沿海地区生态系统的人为压力。