Limited impact of Sargassum muticum on native algal assemblages from rocky intertidal shores |
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| Authors: | Celia Olabarria Iván F. Rodil Mónica Incera Jesús S. Troncoso |
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| Affiliation: | 1. CIIMAR/CIMAR, Centro Interdisciplinar de Investigação Marinha e Ambiental, Rua dos Bragas, 289, 4050-123 Porto, Portugal;1. EU-US Marine Biodiversity Research Group, Instituto Franklin, Universidad de Alcalá, E-28871 Alcalá de Henares, Spain;2. Departamento de Ciencias de la Vida, Universidad de Alcalá, E-28871 Alcalá de Henares, Spain;3. CIMA SL, Centro de Investigaciones Medioambientales del Atlántico (CIMA SL), Arzobispo Elías Yanes, 44, E-38206 Canary Islands, Spain;4. Department of Biodiversity Qatar Environment and Energy Research Institute (QEERI), 5825 Doha, Qatar;1. Laboratory of Catalysis and Corrosion of Materials, Faculty of Sciences, Chouaib Doukkali University, Po Box 20, M-24000 El Jadida, Morocco;2. Phycology, Blue Biodiversity & Biotechnology, P3B-LB2VE, Department of Biology, Faculty of Sciences, Chouaïb Doukkali University, Po Box 20, M-24000 El Jadida, Morocco;3. University of Lille, CNRS, INRA, ENSCL, UMR 8207, UMET - Unité Matériaux et Transformations, F-59000 Lille, France;1. Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA;2. Departamento de Ecoloxía e Bioloxía Animal, Universidade de Vigo, Vigo, Spain;3. Estación de Ciencias Mariñas Illa de Toralla (ECIMAT), Universidade de Vigo, Vigo, Spain |
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| Abstract: | Invasive species represent a serious threat to natural ecosystems through a range of negative effects on native species in the region invaded. The invasive species Sargassum muticum has invaded several temperate regions worldwide including the Galician rocky shoreline (northwestern Spain) in Western Europe. The main aim of this study was to assess if colonization by S. muticum has any effect on native algal assemblages by experimental removal of S. muticum. We predicted that in those plots where S. muticum plants were removed, the structure of native algal assemblages would differ from that in plots where S. muticum plants were untouched. In addition, we predicted that the effect of Sargassum removal would be more important than other causes of variability at the small scale investigated. Results indicated limited impact of S. muticum on native assemblages. The impact was only evident on the total number of native taxa and two understory morpho-functional groups, filamentous and foliose algae, rather than on the entire macroalgal assemblages. |
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