BIOTIC Species Information for Laminaria digitata
Researched byJacqueline Hill Data supplied byMarLIN
Refereed byThis information is not refereed.
General Biology
Growth formDigitate
Straplike / Ribbonlike
Feeding methodPhotoautotroph
Mobility/MovementPermanent attachment
Environmental positionEpilithic
Typical food typesNot relevant HabitAttached
BioturbatorNot relevant FlexibilityHigh (>45 degrees)
FragilityRobust SizeLarge(>50cm)
HeightUp to 2 m Growth Rate1.3 cm/day
Adult dispersal potentialNone DependencyIndependent
General Biology Additional InformationKelps of the family Laminariaceae exhibit an alternation of generations, which involves dissimilar (heteromorphic) phases; an asexual diploid phase (the sporophyte) is usually of considerable size and a haploid dioecious phase (the gametophyte) that is microscopic. Sporophytes of Laminaria digitata can grow to a length of 2-4m. Growth rate is seasonally controlled with a period of rapid growth from February to July and one of slower growth from August to January. The growth rate given is the mean growth rate during season of maximal growth (Kain 1979). There is no defined growth zone in Laminaria digitata but growth is diffuse in the lamina (blade). In general the whole new lamina is able to grow but throughout the year it is greatest near the base.
Biology References Dickinson, 1963, Guiry & Blunden, 1991, Birkett et al., 1998b, Kain, 1979, Bolten & Lüning, 1982,
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