RT Journal Article T1 Checklist of benthic marine algae and cyanobacteria of northern Portugal A1 Araújo, Rita A1 Bárbara, Ignacio A1 Tibaldo, Marta A1 Berecibar, Estíbaliz A1 Díaz Tapia, Pilar A1 Pereira, Rui A1 Pinto, Isabel Sousa K1 Alien species K1 Biogeography K1 Checklist K1 Macroalgae K1 Northern Portugal AB The northern Portuguese coast is a biogeographic transition zone where many macroalgal species have their distribution limits; it is thus a particularly interesting region for investigating species distribution shifts. An updated and complete list of species for this region is not available in spite of its baseline importance for comparative studies with past and present data. Based on new records, literature references, and herbarium data, we provide an updated checklist of the benthic marine algae of the northern Portuguese coast. This checklist includes 346 species: 26 Cyanobacteria, 200 Rhodophyta, 70 Ochrophyta, and 50 Chlorophyta. From these, 21 species are new records for the Portuguese coast (Lyngbya aestuarii, Lyngbya semiplena, Microcoleus acutirostris, Myxosarcina gloeocapsoides, Aiolocolax pulchella, Antithamnion densum, Antithamnion villosum, Antithamnionella spirographidis, Dasya sessilis, Furcellaria lumbricalis, Neosiphonia harveyi, Porphyrostromium boryanum, Chorda filum, Dictyopteris ambigua, Sphacelaria rigidula, Undaria pinnatifida, Vaucheria coronata, Vaucheria velutina, Ulothrix implexa, Ulva scandinavica, and Umbraulva olivascens) and 33 were recorded for the first time in the north of Portugal. Alien species have increased in number and extended their distribution range over the last 10 years in the study area. Distribution shifts of northern cold water species with southern distribution limit in the north of Portugal were not consistent among species. PB Walter de Gruyter SN 1437-4323 YR 2009 FD 2009-02-01 LK http://hdl.handle.net/10347/32804 UL http://hdl.handle.net/10347/32804 LA eng NO Araujo, R., Barbara, I., Tibaldo, M., Berecibar, E., Tapia, P. D., Pereira, R., ... & Pinto, I. S. (2009). Checklist of benthic marine algae and cyanobacteria of northern Portugal. Botanica Marina, 52: 24–46 NO This study was funded by a project (POCI/MAR/56149/2004) and fellowships (R.A., M.T. and E.B.) from the Portuguese Foundation for Science and Technology (F.C.T.) through program POCI 2010, with the support of FEDER and FSE DS Minerva RD 1 may 2026