163,897 species and infraspecific names are in the database, 22,783 images, 63,099 bibliographic items, 481,371 distributional records.

Bibliographic Detail

Cremades, J., Freire-Gago, Ó. & Peteiro, C., 2006

Cremades, J., Freire-Gago, Ó. & Peteiro, C. (2006). Biología, distribución e integración del alga alóctona Undaria pinnatifida (Laminariales, Phaeophyta) en las comunidades bentónicas de las costas de Galicia (NW de la Península Ibérica). Anales del Jardín Botánico de Madrid 63: 169-187.

Undaria pinnatifida is an Asian seaweed that is valuable as an edible species. This kelp was first reported for Spain in the 1980s on Galician coasts, where it is now widely distributed and incorporated into the native community. In Galicia, intertidal populations of the sporophytic phase typically inhabit sites under moderate wave-exposure in the early spring, albeit they can be found throughout the year as the species displays at least two recruitment periods per year. The morphology varies between individuals and depends strongly on the spatiotemporal pattern of environmental conditions. The chronology of the introduction of this species and the types of habitat where it is currently integrated on Galician coasts clearly reveal that the presence and local expansion of this kelp is influenced largely by human activities, mainly shellfish aquaculture and maritime traffic. U. pinnatifida has a slow natural expansion, limited aggressiveness and it temporarily fills empty niches; this kelp displays luxuriant growth only on artificial substrates or in otherwise disturbed communities.

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