Rapid Assessment Survey of two contrasting marinas near Lisbon: Ascidiacea (Chordata: Tunicata)
University of Alicante, Marine Sciences, Spain
Estructura de Missäo para a Extensäo da Plataforma Continental (EMEPC), Portugal
University of Lisbon, Marine and Environmental Sciences Centre (MARE), Portugal
Estrutura de Missão para a Extensão da Plataforma Continental (EMEPC), Portugal
Quercus, Associação Nacional de Conservação da Natureza, Portugal
Instituto Português do Mar e da Atmosfera (IPMA), BioMarPT, Portugal
Instituto Português do Mare da Atmosfera (IPMA), BioMarPT, Portugal
University of Lisbon, Faculty of Science, Portugal
University of Algarve, Centre of Marine Sciences (CCMAR), Portugal
Recreational boating is a major vector of introduction of non-indigenous species worldwide and ascidians are some of the most abundant introduced taxa. Nine ascidian species have been identified in two recreational marinas near Lisbon (Alcântara and Oeiras), sampled during February 2016, following rapid assessment survey (RAS) protocols. Different pontoon floats were sampled by scraping the surfaces with distinct orientations (east, south and west) and submerged structures, such as hanging ropes, buoys, chains and harbor walls were also surveyed. Both marinas are located nearby (about 10km distance) in the Tagus estuary and the dominant fouling species were the mussel Mytilus galloprovincialis and the non-indigenous bryozoans Watersipora subtorquata and Tricellaria inopinata. Nevertheless, significantly different fouling communities were identified within these marinas. M. galloprovincialis and the cnidarians Ectopleura crocea and Actinothoe sphyrodeta were abundant at the Oeiras marina, with very few ascidians recorded. On the other hand, a high abundance of ascidians were found at the Alcântara marina, with Styela plicata, S. clava, Microcosmus squamiger and Botrylloides leachii as the dominant species. The scarcity of ascidians in Oeiras marinas was noteworthy since a single specimen of Corella eumyota was recorded in this marina, while high abundances of this species had been observed in a previous study in February 2008.
XIX Iberian Symposium on Marine Biology Studies, Porto, Portugal, 5 Sep - 9 Sep, 2016.
2. GLOBAL CHANGES, INVASIVE SPECIES AND CONSERVATION
(2016). Rapid Assessment Survey of two contrasting marinas near Lisbon: Ascidiacea (Chordata: Tunicata).
Front. Mar. Sci.
XIX Iberian Symposium on Marine Biology Studies.
26 Apr 2016;
03 Sep 2016.
Prof. Alfonso A Ramos-Esplá, University of Alicante, Marine Sciences, Alicante, Alicante, 03080, Spain, email@example.com