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Vertical migration mitigates UV effects on zooplankton community composition

Hylander, Samuel LU and Hansson, Lars-Anders LU (2010) In Journal of Plankton Research 32(7). p.971-980
Abstract
Several zooplankton species are susceptible to ultraviolet radiation (UV), suggesting that UV may shape zooplankton community composition. Little is known, however, about the quantitative effects of long-term UV exposure in relation to biological processes. Therefore, we studied effects of UV on behaviour, population dynamics and reproduction of several zooplankton taxa. We identified different strategies regarding daytime vertical distribution: a strong response to UV threat, illustrated by Daphnia; a weak, albeit significant response, such as in copepods; and lastly, a stationary position in a depth refuge, as in Chydorus and Eurycercus. The relative abundances of the different zooplankton species were similar and only Daphnia and... (More)
Several zooplankton species are susceptible to ultraviolet radiation (UV), suggesting that UV may shape zooplankton community composition. Little is known, however, about the quantitative effects of long-term UV exposure in relation to biological processes. Therefore, we studied effects of UV on behaviour, population dynamics and reproduction of several zooplankton taxa. We identified different strategies regarding daytime vertical distribution: a strong response to UV threat, illustrated by Daphnia; a weak, albeit significant response, such as in copepods; and lastly, a stationary position in a depth refuge, as in Chydorus and Eurycercus. The relative abundances of the different zooplankton species were similar and only Daphnia and copepod nauplii displayed a slight decrease in relative abundance in response to UV treatment. Daphnia also reacted to the UV threat by increasing resting egg production, whereas long-term population dynamics for all studied species were surprisingly similar between treatments, despite considerable differences in UV exposure for several months. We conclude that zooplankton communities at temperate latitudes are able to survive increased UV levels due to efficient defences, suggesting that future potential increases in UV radiation may result in only moderate impacts on zooplankton population dynamics and community composition. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
community, zooplankton, UV, vertical migration
in
Journal of Plankton Research
volume
32
issue
7
pages
971 - 980
publisher
Oxford University Press
external identifiers
  • wos:000278443900001
  • scopus:77953245148
ISSN
0142-7873
DOI
10.1093/plankt/fbq037
project
CAnMove
BECC
language
English
LU publication?
yes
id
aac1bb79-684b-40ff-928b-2691ef789293 (old id 1630953)
date added to LUP
2010-07-22 13:40:09
date last changed
2018-05-29 10:39:13
@article{aac1bb79-684b-40ff-928b-2691ef789293,
  abstract     = {Several zooplankton species are susceptible to ultraviolet radiation (UV), suggesting that UV may shape zooplankton community composition. Little is known, however, about the quantitative effects of long-term UV exposure in relation to biological processes. Therefore, we studied effects of UV on behaviour, population dynamics and reproduction of several zooplankton taxa. We identified different strategies regarding daytime vertical distribution: a strong response to UV threat, illustrated by Daphnia; a weak, albeit significant response, such as in copepods; and lastly, a stationary position in a depth refuge, as in Chydorus and Eurycercus. The relative abundances of the different zooplankton species were similar and only Daphnia and copepod nauplii displayed a slight decrease in relative abundance in response to UV treatment. Daphnia also reacted to the UV threat by increasing resting egg production, whereas long-term population dynamics for all studied species were surprisingly similar between treatments, despite considerable differences in UV exposure for several months. We conclude that zooplankton communities at temperate latitudes are able to survive increased UV levels due to efficient defences, suggesting that future potential increases in UV radiation may result in only moderate impacts on zooplankton population dynamics and community composition.},
  author       = {Hylander, Samuel and Hansson, Lars-Anders},
  issn         = {0142-7873},
  keyword      = {community,zooplankton,UV,vertical migration},
  language     = {eng},
  number       = {7},
  pages        = {971--980},
  publisher    = {Oxford University Press},
  series       = {Journal of Plankton Research},
  title        = {Vertical migration mitigates UV effects on zooplankton community composition},
  url          = {http://dx.doi.org/10.1093/plankt/fbq037},
  volume       = {32},
  year         = {2010},
}