Structure and temporal dynamics of a seaweed assemblage dominated by the invasive lineage 2 of Asparagopsis taxiformis (Bonnemaisoniaceae, Rhodophyta) in the Alboran Sea Zanolla, Marianela Carmona, R. Rosa Álamos, Julio Carlos De La Altamirano, María Alboran Sea Biomass Evenness Invasive Gametophyte Shannon index Species richness Asparagopsis taxiformis is a rhodophycean species composed of six genetic lineages, one of which is considered a relevant invasive component of Mediterranean flora. This study describes seasonal changes in the structure and biomass of the native community associated with A. taxiformis on the coast of Granada (southern Spain). The native community was represented by 18 Rhodophyta, 3 Chlorophyta, and 4 Ochrophyta species. Biomass was dominated by A. taxiformis and Halopteris filicina. In January, A. taxiformis represented only 16% of the whole community biomass, but 2 months later, more than 90% of the community biomass was formed by the invasive species. During the study period, species richness, the Shannon diversity index, and species evenness showed low and generally stable values. Given that A. taxiformis gametophytes are present throughout the year, they likely pose a constant stress to the development of the native community. This survey provides baseline information on the macroalgal community structure, which may be useful to further studies on the actual impact of the invasive lineage of A. taxiformis 2019-06-05T11:54:06Z 2019-06-05T11:54:06Z 2018-05-18 info:eu-repo/semantics/article ZANOLLA, M., CARMONA, R., DE LA ROSA, J., & ALTAMIRANO, M. (2018). Structure and temporal dynamics of a seaweed assemblage dominated by the invasive lineage 2 of Asparagopsis taxiformis (Bonnemaisoniaceae, Rhodophyta) in the Alboran Sea. Mediterranean Marine Science, 19(1), 147-155. [http://dx.doi.org/10.12681/mms.1892] http://hdl.handle.net/10481/55935 10.12681/mms.1892 eng http://creativecommons.org/licenses/by-nc-sa/3.0/es/ info:eu-repo/semantics/openAccess Atribución-NoComercial-CompartirIgual 3.0 España Hellenic Centre for Marine Research