Fresh biomass of macroalgae collected at Hansneset, Kongsfjorden, Spitsbergen in 1996/1998

We surveyed macroalgae at Hansneset, Blomstrand in Kongsfjorden, Svalbard, down to 30 m depth between 1996 and 1998. In total, 62 species were identified: 16 Chlorophyta, 25 Phaeophyceae, and 21 Rhodophyta. The majority of species (53.5%) belonged to the Arctic cold-temperate group, followed in freq...

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Bibliographic Details
Main Authors: Hop, Haakon, Wiencke, Christian, Vögele, Barbara, Kovaltchouk, Nikolaj A
Format: Dataset
Language:English
Published: PANGAEA 2012
Subjects:
Acrosiphonia spp.
biomass
wet mass
Alaria esculenta
Callophyllis cristata
Chorda filum
Chordaria flagelliformis
DEPTH
water
Desmarestia aculeata
Desmarestia viridis
Devaleraea ramentacea
Dictyosiphon foeniculaceus
DIVER
Fucus distichus
Hansneset
Haplospora globosa
Kongsfjorden
Spitsbergen
Arctic
Laminaria digitata
Laminaria saccharina
Laminaria solidungula
Laminaria spp.
Svalbard
Greenland
Norway
Blomstrand
Kongsfjord*
Northern Norway
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.864321
https://doi.org/10.1594/PANGAEA.864321
Description
Summary:We surveyed macroalgae at Hansneset, Blomstrand in Kongsfjorden, Svalbard, down to 30 m depth between 1996 and 1998. In total, 62 species were identified: 16 Chlorophyta, 25 Phaeophyceae, and 21 Rhodophyta. The majority of species (53.5%) belonged to the Arctic cold-temperate group, followed in frequency by species distributed from the Arctic to the warm-temperate region (25.9%). Four endemic Arctic species (Laminaria solidungula, Acrosiphonia flagellata, A. incurva, and Urospora elongata) were found. Two species (Pogotrichum filiforme and Mikrosyphar polysiphoniae) were new to Svalbard. Chlorophyta, Phaeophyceae, and Rhodophyta extended from the eulittoral zone down to 11, 21, and >30 m depths with maximum biomasses at 1-5 m, 5-10 m, and 5-30 m depths, respectively. Annual and pseudoperennial species had highest biomasses in the upper 5 m, while perennials were distributed deeper. The highest biomass (8600 g/m**2 wet weight) at 5 m depth comprised mainly L. digitata, Saccorhiza dermatodea, Alaria esculenta, and Saccharina latissima. The biogeographic composition of macroalgae at Hansneset was rather similar to that of northeastern Greenland, but different from that of northern Norway, which has a higher proportion of temperate species. Climate warming and ship traffic may extend some of the distribution ranges of macroalgae from mainland Norway to Svalbard.

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