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Diel vertical migration, size distribution and photoprotection in zooplankton as response to UV-A radiation

Ekvall, Mikael LU ; Hylander, Samuel; Walles, Tim LU ; Yang, Xi and Hansson, Lars-Anders LU (2015) In Limnology and Oceanography 60(6). p.2048-2058
Abstract
The transparency regulator hypothesis (TRH) proposes that ultraviolet radiation (UVR) is a main driving force behind diel vertical migration (DVM) of zooplankton in clearwater systems. While previous studies have mainly studied DVM in relation to the TRH on a spatial scale across systems we here focus on long-term trends in a single system in order to assess if UVR explains observed patterns in DVM. We show that the strength of DVM in Daphnia is to a large extent explained by UVR and we demonstrate a tipping point at which the UVR intensity drastically affects the strength of DVM in Daphnia. In contrast, the strength of DVM could not be explained by the level of UVR among calanoid copepods. The amount of photoprotective compounds did not... (More)
The transparency regulator hypothesis (TRH) proposes that ultraviolet radiation (UVR) is a main driving force behind diel vertical migration (DVM) of zooplankton in clearwater systems. While previous studies have mainly studied DVM in relation to the TRH on a spatial scale across systems we here focus on long-term trends in a single system in order to assess if UVR explains observed patterns in DVM. We show that the strength of DVM in Daphnia is to a large extent explained by UVR and we demonstrate a tipping point at which the UVR intensity drastically affects the strength of DVM in Daphnia. In contrast, the strength of DVM could not be explained by the level of UVR among calanoid copepods. The amount of photoprotective compounds did not differ between zooplankton found at different depths indicating that zooplankton do not change their vertical position in relation to the amount of accumulated photoprotective compounds. In addition, we show that both Daphnia and calanoid copepods display patterns of size structured migration. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Limnology and Oceanography
volume
60
issue
6
pages
2048 - 2058
publisher
ASLO
external identifiers
  • wos:000363888400014
  • scopus:84945952749
ISSN
1939-5590
DOI
10.1002/lno.10151
language
English
LU publication?
yes
id
c7a3893e-e1fd-44f4-ab99-dedbaa925920 (old id 8389419)
date added to LUP
2015-12-21 11:33:44
date last changed
2017-03-05 03:58:23
@article{c7a3893e-e1fd-44f4-ab99-dedbaa925920,
  abstract     = {The transparency regulator hypothesis (TRH) proposes that ultraviolet radiation (UVR) is a main driving force behind diel vertical migration (DVM) of zooplankton in clearwater systems. While previous studies have mainly studied DVM in relation to the TRH on a spatial scale across systems we here focus on long-term trends in a single system in order to assess if UVR explains observed patterns in DVM. We show that the strength of DVM in Daphnia is to a large extent explained by UVR and we demonstrate a tipping point at which the UVR intensity drastically affects the strength of DVM in Daphnia. In contrast, the strength of DVM could not be explained by the level of UVR among calanoid copepods. The amount of photoprotective compounds did not differ between zooplankton found at different depths indicating that zooplankton do not change their vertical position in relation to the amount of accumulated photoprotective compounds. In addition, we show that both Daphnia and calanoid copepods display patterns of size structured migration.},
  author       = {Ekvall, Mikael and Hylander, Samuel and Walles, Tim and Yang, Xi and Hansson, Lars-Anders},
  issn         = {1939-5590},
  language     = {eng},
  number       = {6},
  pages        = {2048--2058},
  publisher    = {ASLO},
  series       = {Limnology and Oceanography},
  title        = {Diel vertical migration, size distribution and photoprotection in zooplankton as response to UV-A radiation},
  url          = {http://dx.doi.org/10.1002/lno.10151},
  volume       = {60},
  year         = {2015},
}