Abundance, biomass and composition of spring ice algal and phytoplankton communities of the Laptev Sea (Arctic)

Shuxian, Zheng and Jianfeng, He and Guizhong, Wang and Shaojing, Li (2005) Abundance, biomass and composition of spring ice algal and phytoplankton communities of the Laptev Sea (Arctic). Advances in Polar Science, 16 (2). pp. 70-80.

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Abstract

Abundance, biomass and composition of the ice algal and phytoplankton communities were investigated in the southeastern Laptev Sea in spring 1999. Diatoms dominated the algal communities and pennate diatoms dominated the diatom population. 12 dominant algal species occurred within sea ice and underlying water column, including Fragilariopsis oceanica, F. cylindrus, Nitzschia frigida, N. promare, Achnanthes taeniata, Nitzschia neofrigida, Navicula pelagica, N. vanhoeffenii, N. septentrionalis, Melosira arctica, Clindrotheca closterium and Pyramimonas sp. The algal abundance of bottom 10cm sea ice varied between 14.6 and 1562.2 x 10(4) cells 1(-1) with an average of 639.0 x 10(4) cells 1(-1), and the algal biomass ranged from 7.89 to 2093.5 µg Cl(-1) with an average of 886.9 µg Cl(-1), which were generally one order of magnitude higher than those of sub-bottom ice and two orders of magnitude higher than those of underlying surface water. The integrated algal abundance and biomass of lowermost 20 cm ice column were averagely 7.7 and 12.2 times as those of upper 20 m water column, respectively, suggesting that the ice algae might play an important role in maintaining the coastal marine ecosystem before the thawing of sea ice. Ice algae influenced the phytoplankton community of the underlying water column. However, the "seeding" of ice algae for phytoplankton bloom was negligible because of the low phytoplankton biomass within the underlying water column.

Item Type:	Article
Related URLs:
Keywords:	ice algae, phytoplankton, biomass, Laptev Sea, Arctic.
Subjects:	Unspecified
Organizations:	Unspecified
Date Deposited:	12 May 2023 12:38
URI:	http://library.arcticportal.org/id/eprint/2291

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