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Species- and stratification-dependent diel vertical migration behaviour of three dinoflagellate species in a laboratory study

Jephson, Therese LU and Carlsson, Per LU (2009) In Journal of Plankton Research 31(11). p.1353-1362
Abstract
This study shows that different species of the same genus can behave differently in relation to a salinity gradient and suggests that a halocline can act as a barrier to the diel vertical migration (DVM) of dinoflagellate species. In a laboratory study, we found that the dinoflagellates Ceratium furca, C. tripos and Dinophysis acuta did not cross a salinity gradient of 5 psu, but instead exhibited DVM exclusively below and above the halocline. Furthermore, C. tripos aggregated in the halocline during the night and migrated to the surface at midday, whereas C. furca aggregated in the halocline at midday and migrated downwards to the bottom during the dark period. Dinophysis acuta was found exclusively above the halocline, with the highest... (More)
This study shows that different species of the same genus can behave differently in relation to a salinity gradient and suggests that a halocline can act as a barrier to the diel vertical migration (DVM) of dinoflagellate species. In a laboratory study, we found that the dinoflagellates Ceratium furca, C. tripos and Dinophysis acuta did not cross a salinity gradient of 5 psu, but instead exhibited DVM exclusively below and above the halocline. Furthermore, C. tripos aggregated in the halocline during the night and migrated to the surface at midday, whereas C. furca aggregated in the halocline at midday and migrated downwards to the bottom during the dark period. Dinophysis acuta was found exclusively above the halocline, with the highest density in the surface water at midday. The present results suggest that different dinoflagellate species display unique DVM behaviours in stratified waters. The species-specific DVM strategies revealed in this study are of central importance for understanding the ecology of these taxa and to further elucidate both the ecological significance and the mechanisms of DVM. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Plankton Research
volume
31
issue
11
pages
1353 - 1362
publisher
Oxford University Press
external identifiers
  • wos:000270710900006
  • scopus:70349948752
ISSN
0142-7873
DOI
10.1093/plankt/fbp078
language
English
LU publication?
yes
id
fc63aa78-7f58-41ae-8722-5f33c302bb71 (old id 1507289)
date added to LUP
2009-11-20 15:27:28
date last changed
2017-01-01 05:54:53
@article{fc63aa78-7f58-41ae-8722-5f33c302bb71,
  abstract     = {This study shows that different species of the same genus can behave differently in relation to a salinity gradient and suggests that a halocline can act as a barrier to the diel vertical migration (DVM) of dinoflagellate species. In a laboratory study, we found that the dinoflagellates Ceratium furca, C. tripos and Dinophysis acuta did not cross a salinity gradient of 5 psu, but instead exhibited DVM exclusively below and above the halocline. Furthermore, C. tripos aggregated in the halocline during the night and migrated to the surface at midday, whereas C. furca aggregated in the halocline at midday and migrated downwards to the bottom during the dark period. Dinophysis acuta was found exclusively above the halocline, with the highest density in the surface water at midday. The present results suggest that different dinoflagellate species display unique DVM behaviours in stratified waters. The species-specific DVM strategies revealed in this study are of central importance for understanding the ecology of these taxa and to further elucidate both the ecological significance and the mechanisms of DVM.},
  author       = {Jephson, Therese and Carlsson, Per},
  issn         = {0142-7873},
  language     = {eng},
  number       = {11},
  pages        = {1353--1362},
  publisher    = {Oxford University Press},
  series       = {Journal of Plankton Research},
  title        = {Species- and stratification-dependent diel vertical migration behaviour of three dinoflagellate species in a laboratory study},
  url          = {http://dx.doi.org/10.1093/plankt/fbp078},
  volume       = {31},
  year         = {2009},
}