Rhodolith/Maërl Beds: A Global Perspective pp 265-279 | Cite as
North Atlantic Rhodolith Beds
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Abstract
Beds of coralline algal sediment form ecologically and economically important habitats in the North Atlantic. These habitats can occur from the intertidal down to 60 m depth, and they are locally abundant in several countries. Thirteen species of coralline algae form rhodoliths or maerl in this region; Lithothamnion corallioides, L. glaciale, L. tophiforme and Phymatolithon calcareum are the most widely recorded. The structure and biodiversity of these habitats is destroyed by dredging and can be degraded by towed demersal fishing gear and by mussel and salmon farming. Legislation has been passed in the European Union (EU) to protect P. calcareum and L. corallioides which should be extended to include the other maerl species from the region. Outside the EU there is a lack of baseline information concerning the importance of these habitats: a fuller understanding of their role may lead to protection in Scandinavia, Iceland and the Atlantic coasts of Canada and the United States. The design of such protected areas would need to consider the ongoing effects of invasive species, ocean warming and acidification.
Keywords
Ocean Acidification Coralline Alga Grateloupia Turuturu European Union Habitat Directive Bonnemaisonia HamiferaNotes
Acknowledgements
JHK acknowledges support from CONACyt-Mexico, SEP-Mexico, Smithsonian Institution-USA and National University of Ireland, Galway. Studies on the Iberian Peninsula were supported by the research projects CGL2006-03576/BOS (Ministerio de Educacion y Ciencia and FEDER) and PGIDIT03PXIB10301PR (Xunta de Galicia). VP acknowledges support by Xunta de Galicia (Plan Galego de Investigación, Innovación e Crecemento, Plan I2C, 2011–2015), Universidade da Coruña and Programa Nacional de Movilidad de Recursos Humanos (Spain’s Ministerio de Economía y Competitividad). JHS acknowledges support from the EU ’Mediterranean Sea Acidification under a changing climate’ project (MedSeA; grant agreement 265103).
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