Species: Ascophyllum nodosum (L.) Le Jolis Grisetang in Norwegian Bokmål
Classification The species Ascophyllum nodosum belongs to:
Photos Photos of Ascophyllum nodosum (8):
1 of 8: HabitThe species forms a zone in the lower intertidal Photo: © Kjersti Sjøtun Terms of use
Species Ascophyllum nodosum
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Sampling location Øystese, Hardangerfjord, Hordaland
Sampling date 2008-10-28
Published 2009-03-31 Photo is showing (categorized) Note: The species is common in the sheltered intertidal along the coast of Norway. The long, strap-like shoots originate from a common holdfast. The shoots have lateral branching in addition to dichotomous branching. The growing ends of the shoots form a gas vesicle during winter, which makes it possible to determine the minimum age of shoots. The species is dioecious, and the gametes are released from the receptacles during spring. In Norway the species is harvested for the production of seaweed meal.
2 of 8: Habit
Species Ascophyllum nodosum
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Sampling location Fyrsundet, Fedje, Hordaland
Sampling date 2009-07-26
Published 2010-03-10 Photo is showing (categorized)
3 of 8: Habitat
Species Ascophyllum nodosum
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Sampling location Fyrsundet, Fedje, Hordaland
Sampling date 2009-07-26
Published 2010-03-10 Photo is showing (categorized) Note: Specimens growing on rock in the tidal zone, note the occurrence of Polysiphonia lanosa growing epiphytically.
4 of 8: Loose-lying specimens in a shallow lagoonIn very sheltered localities the species can be loose-lying. This form of the species is called A. nodosum forma scorpioides and has a much narrower thallus with irregular branching and few or no air- vesicles. Photo: © Vivian Husa Terms of use
Species Ascophyllum nodosum
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Sampling location Kjelstraumen, Austrheim, Hordaland
Sampling date 2008-04-10
Published 2010-03-10 Photo is showing (categorized)
5 of 8: Branches carrying receptacles
Species Ascophyllum nodosum
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Sampling location Ormhilleren, Øygarden, Hordaland
Sampling date 2010-04-10
Published 2010-05-14 Photo is showing (categorized)
6 of 8: Release of male gametsThe species is dioecious. The yellow droplets on the receptacles contain male gamets being released during low tide Photo: © Kjersti Sjøtun Terms of use
Species Ascophyllum nodosum
Verified by Network members
Sampling location Ormhilleren, Øygarden, Hordaland
Sampling date 2010-04-10
Published 2010-05-14 Photo is showing (categorized)
7 of 8: Release of female gametsThe species is dioecious. The greenish droplets on the receptacles contain female gamets being released during low tide Photo: © Kjersti Sjøtun Terms of use
Species Ascophyllum nodosum
Verified by Network members
Sampling location Ormhilleren, Øygarden, Hordaland
Sampling date 2010-04-10
Published 2010-05-14 Photo is showing (categorized)
8 of 8: Shedding of epidermal layerShedding of the epidermal layer is probably a defence mechanism against epiphytes Photo: © Kjersti Sjøtun Terms of use
Species Ascophyllum nodosum
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Sampling location Ormhilleren, Øygarden, Hordaland
Sampling date 2006-09-15
Published 2010-05-14
