Nannoplankton flora in the Southern Ocean, with special reference to siliceous varieties
Distributions of calcareous nannoplankton and related siliceous microorganism, and their population size along longitudinal 150 and 115°E lines in the Southern Ocean, are reported according to the results of scanning electron microscopy. In the Southern Ocean four nannoplankton assemblages were defi...
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Format: | Report |
Language: | English |
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Department of Earth Sciences, Nara University of Education
1986
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Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1876 http://id.nii.ac.jp/1291/00001876/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1876&item_no=1&attribute_id=18&file_no=1 |
Summary: | Distributions of calcareous nannoplankton and related siliceous microorganism, and their population size along longitudinal 150 and 115°E lines in the Southern Ocean, are reported according to the results of scanning electron microscopy. In the Southern Ocean four nannoplankton assemblages were defined, namely, subtropical, subantarctic, antarctic and circum-antarctic pack ice assemblages. The former three assemblages are composed mainly of calcareous nannoplankton, dominated by varieties of Coccolithophyceae. The last assemblage is dominated by a great number of siliceous microorganisms. The present siliceous microorganisms are yet unnamed and their taxonomical position is not well known. But their restricted distribution and large number of individuals in the off pack ice zone must be evaluated in polar sea ecosystems. |
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