Dependency of dinoflagellate vertical migration on salinity stratification
(2011) In Aquatic Microbial Ecology 63(3). p.255-264- Abstract
- Increasing precipitation and surface water temperature due to global change may strengthen the salinity gradient in coastal regions, which could influence the behaviour of dinoflagellate migration. We studied diel vertical migration (DVM) behaviour in the dinoflagellates Prorocentrum minimum and Heterocapsa triquetra using vertically stratified laboratory columns with 3 different salinity gradients (difference of 6, 11 and 16 psu). With nutrient-depleted conditions at the surface, and with nutrients added below the halocline, P. minimum remained mainly concentrated in the bottom water, while H. triquetra performed DVM under all 3 salinity treatments. H. triquetra migrated through a salinity difference of 6 and 11 psu, concentrated at the... (More)
- Increasing precipitation and surface water temperature due to global change may strengthen the salinity gradient in coastal regions, which could influence the behaviour of dinoflagellate migration. We studied diel vertical migration (DVM) behaviour in the dinoflagellates Prorocentrum minimum and Heterocapsa triquetra using vertically stratified laboratory columns with 3 different salinity gradients (difference of 6, 11 and 16 psu). With nutrient-depleted conditions at the surface, and with nutrients added below the halocline, P. minimum remained mainly concentrated in the bottom water, while H. triquetra performed DVM under all 3 salinity treatments. H. triquetra migrated through a salinity difference of 6 and 11 psu, concentrated at the surface at noon, then migrated to the nutrient-rich bottom water during the night. A salinity gradient of 16, however, stopped H. triquetra cells from moving through the gradient and resulted in a concentration of cells in the cline during the night. At midday, cells were again found at the surface. P. minimum and H. triquetra grown in 4 different salinities (10, 15, 20, 26 psu) and at 3 different temperatures (10, 15, 20 degrees C) showed higher specific growth rates with increasing temperature only in the 2 highest salinity treatments. At 10 degrees C, specific growth rates were not affected by different salinities. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1986177
- author
- Jephson, Therese LU ; Fagerberg, Tony LU and Carlsson, Per LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Dinoflagellate, Stratification, Vertical distribution, Global change, Salinity, Temperature, Growth rate, Heterocapsa triquetra, Prorocentrum, minimum
- in
- Aquatic Microbial Ecology
- volume
- 63
- issue
- 3
- pages
- 255 - 264
- publisher
- Inter-Research
- external identifiers
-
- wos:000291057400005
- ISSN
- 0948-3055
- DOI
- 10.3354/ame01498
- language
- English
- LU publication?
- yes
- id
- c41afe2f-868a-4fa0-8865-18b186e8646a (old id 1986177)
- date added to LUP
- 2016-04-01 14:56:54
- date last changed
- 2021-01-05 23:57:00
@article{c41afe2f-868a-4fa0-8865-18b186e8646a, abstract = {{Increasing precipitation and surface water temperature due to global change may strengthen the salinity gradient in coastal regions, which could influence the behaviour of dinoflagellate migration. We studied diel vertical migration (DVM) behaviour in the dinoflagellates Prorocentrum minimum and Heterocapsa triquetra using vertically stratified laboratory columns with 3 different salinity gradients (difference of 6, 11 and 16 psu). With nutrient-depleted conditions at the surface, and with nutrients added below the halocline, P. minimum remained mainly concentrated in the bottom water, while H. triquetra performed DVM under all 3 salinity treatments. H. triquetra migrated through a salinity difference of 6 and 11 psu, concentrated at the surface at noon, then migrated to the nutrient-rich bottom water during the night. A salinity gradient of 16, however, stopped H. triquetra cells from moving through the gradient and resulted in a concentration of cells in the cline during the night. At midday, cells were again found at the surface. P. minimum and H. triquetra grown in 4 different salinities (10, 15, 20, 26 psu) and at 3 different temperatures (10, 15, 20 degrees C) showed higher specific growth rates with increasing temperature only in the 2 highest salinity treatments. At 10 degrees C, specific growth rates were not affected by different salinities.}}, author = {{Jephson, Therese and Fagerberg, Tony and Carlsson, Per}}, issn = {{0948-3055}}, keywords = {{Dinoflagellate; Stratification; Vertical distribution; Global change; Salinity; Temperature; Growth rate; Heterocapsa triquetra; Prorocentrum; minimum}}, language = {{eng}}, number = {{3}}, pages = {{255--264}}, publisher = {{Inter-Research}}, series = {{Aquatic Microbial Ecology}}, title = {{Dependency of dinoflagellate vertical migration on salinity stratification}}, url = {{http://dx.doi.org/10.3354/ame01498}}, doi = {{10.3354/ame01498}}, volume = {{63}}, year = {{2011}}, }