Living planktonic foraminifera in the Fram Strait (Arctic): absence of diel vertical migration during the midnight sun

The timing of vertical migration in planktonic foraminifera (ex. ontogenetic, diel) is still an open debate. This work aims to investigate the diel vertical migration (DVM) of Neogloboquadrina pachyderma ( N. pachyderma ) and Turborotalita quinqueloba (T. quinqueloba ) in the Arctic during the midni...

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Bibliographic Details
Published in:Hydrobiologia 2014-01, Vol.721 (1), p.285-295
Main Authors: Manno, C., Pavlov, A. K.
Format: Article
Language:English
Subjects:
Animal migration
Aquatic ecosystems
Biomedical and Life Sciences
Ecology
Foraminifera
Freshwater & Marine Ecology
Life Sciences
Marine
Neogloboquadrina pachyderma
Plankton
Primary Research Paper
Turborotalita quinqueloba
Zoology
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Summary:The timing of vertical migration in planktonic foraminifera (ex. ontogenetic, diel) is still an open debate. This work aims to investigate the diel vertical migration (DVM) of Neogloboquadrina pachyderma ( N. pachyderma ) and Turborotalita quinqueloba (T. quinqueloba ) in the Arctic during the midnight sun. N. pachyderma and T. quinqueloba dominate the total assemblage in the cold Polar Water and warmer North Atlantic Water masses, respectively. Foraminifera were collected at several depths along the Fram Strait. Afterwards sampling was performed at the same station for 24 h at continuous and discrete time intervals. Results show no evidence of planktonic foraminifera DVM since there was no significant variability in the abundance and size distribution during the 24-h collection period. This finding provides information to improve the interpretation of foraminifera in paleoclimatic works. This is especially relevant in the Fram Strait as paleoclimatic studies in this region are fundamental to investigating the history of the Atlantic water inflow into the Arctic Ocean.
ISSN:0018-8158
1573-5117
DOI:10.1007/s10750-013-1669-4