title: The invasive kelp Undaria pinnatifida (Laminariales, Ochrophyta) along the north coast of Portugal: distribution model versus field observations.
abstract: After the first report of Undaria pinnatifida in north Portugal (between 1999 and 2007), a rapid spread of this species could be expected due to the presence of a stable population and the favourable environmental conditions proposed by distribution models. However, field surveys showed that U. pinnatifida was not present in most of the rocky shores in north Portugal. It seems that U. pinnatifida cannot outcompete native species outside of marinas in north Portugal. The only population in natural rocky shores was found in Buarcos, where this species was frequent. This study provides density data of U. pinnatifida that will be useful in the future to monitor changes on its abundance and distribution in the centre and south of Portugal.
authors.affiliation: CIIMAR/CIMAR, Centro Interdisciplinar de Investigação Marinha e Ambiental, Rua dos Bragas, 289, 4050-123 Porto, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Via Panoramica 36, 4150-564 Porto, Portugal. Electronic address: puri.sanchez@fc.up.pt.
authors.forename: P
authors.initials: P
authors.lastname: Veiga
authors.affiliation: CIIMAR/CIMAR, Centro Interdisciplinar de Investigação Marinha e Ambiental, Rua dos Bragas, 289, 4050-123 Porto, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Via Panoramica 36, 4150-564 Porto, Portugal.
authors.forename: A C
authors.initials: AC
authors.lastname: Torres
authors.affiliation: CIIMAR/CIMAR, Centro Interdisciplinar de Investigação Marinha e Ambiental, Rua dos Bragas, 289, 4050-123 Porto, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Via Panoramica 36, 4150-564 Porto, Portugal; Departamento de Ecoloxía e Bioloxía Animal, Universidade de Vigo, Campus de As Lagoas, 36310 Vigo, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Rubal
authors.affiliation: Departamento de Ecoloxía e Bioloxía Animal, Universidade de Vigo, Campus de As Lagoas, 36310 Vigo, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Troncoso
authors.affiliation: CIIMAR/CIMAR, Centro Interdisciplinar de Investigação Marinha e Ambiental, Rua dos Bragas, 289, 4050-123 Porto, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Via Panoramica 36, 4150-564 Porto, Portugal.
authors.forename: I
authors.initials: I
authors.lastname: Sousa-Pinto
mesh_terms: D001267:Atlantic Ocean; D003710:Demography; D058865:Introduced Species; D044423:Kelp; D008954:Models, Biological; D011174:Portugal; D044648:Undaria
keywords: Bioinvasion; Intertidal; North Portugal; North-east Atlantic; Rocky shores; Undaria pinnatifida