Culture and field studies of Ulvellaceae and other microfilamentous green seaweeds in subarctic and arctic waters around Iceland
Gunnarsson, Karl; Nielsen, Ruth
Knowledge relating to the distribution of microfilamentous green algae in marine environments in the northern North Atlantic is extended with collections from waters around Iceland in the years 1999 and 2005 to 2007. These algae were looked for and some of them identified in the field samples, while the identification of most species depended on morphological structures observed in cultured material. Twenty-five species were identified, of which eleven were new records for Iceland. Arthrochaete penetrans, an arctic species was studied in culture for the first time. Other species have a wider distribution in the North Atlantic. A number of species were only found growing into calcareous substrata, i. e. Ostreobium quekettii, Phaeophila dendroides, Eugomontia sacculata and Gomontia polyrhiza. Pseudendoclonium submarinum and Dilabifilum arthropyreniae were found on wood. Some species were confined to a specific host; Tellamia contorta on the prosobranch Littorina obtusata, Pseudendoclonium dynamenae on the hydroid Dynamena pumilla and Ulvella operculata in Chondrus crispus, although most taxa were associated with a variety of host species.