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Glacial clay affects foraging performance in a Patagonian fish and cladoceran

Jönsson, Mikael LU ; Ranåker, Lynn LU ; Nicolle, Alice LU ; Ljungberg, Peter LU ; Fagerberg, Tony LU ; Hylander, Samuel LU ; Jephson, Therese LU ; Lebret, Karen LU ; von Einem, Jessica LU and Hansson, Lars-Anders LU , et al. (2011) In Hydrobiologia 663(1). p.101-108
Abstract
Climate change is altering temperatures and precipitation patterns all over the world. In Patagonia, Argentina, predicted increase in precipitation together with rapidly melting glaciers increase the surface runoff, and thereby the transport of suspended solids to recipient lakes. Suspended solids affect the visual conditions in the water which in turn restricts visual foraging. The native fish Aplochiton zebra Jenyns, and its filter-feeding cladoceran prey, Daphnia commutata Ekman, were subjected to foraging experiments at three turbidity levels. A. zebra foraging rate was substantially reduced at naturally occurring turbidity levels and the filtering rate of D. commutata was reduced at the highest turbidity level. This indicates that... (More)
Climate change is altering temperatures and precipitation patterns all over the world. In Patagonia, Argentina, predicted increase in precipitation together with rapidly melting glaciers increase the surface runoff, and thereby the transport of suspended solids to recipient lakes. Suspended solids affect the visual conditions in the water which in turn restricts visual foraging. The native fish Aplochiton zebra Jenyns, and its filter-feeding cladoceran prey, Daphnia commutata Ekman, were subjected to foraging experiments at three turbidity levels. A. zebra foraging rate was substantially reduced at naturally occurring turbidity levels and the filtering rate of D. commutata was reduced at the highest turbidity level. This indicates that Daphnia may be partly released from predation from A. zebra at the same time as it can maintain relatively high feeding rates as turbidity increases. Lower foraging rates at the same time as the metabolic demand increases, through increased temperatures, may result in larger effects on A. zebra than could be expected from increases in turbidity or temperature alone. Turbidity may, as an indirect effect of climate change, decrease planktivore foraging rates and thereby alter the interaction strength between trophic levels. (Less)
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Contribution to journal
publication status
published
subject
keywords
Turbidity, Glacial melting, Foraging, Filtering rate, Visual conditions
in
Hydrobiologia
volume
663
issue
1
pages
101 - 108
publisher
Springer
external identifiers
  • wos:000286393300006
  • scopus:79959796040
ISSN
0018-8158
DOI
10.1007/s10750-010-0557-4
project
BECC
language
English
LU publication?
yes
id
43d5d291-b1bf-4b48-8ba1-4f1ebca9c409 (old id 1790767)
date added to LUP
2011-03-02 14:42:08
date last changed
2017-09-10 03:08:28
@article{43d5d291-b1bf-4b48-8ba1-4f1ebca9c409,
  abstract     = {Climate change is altering temperatures and precipitation patterns all over the world. In Patagonia, Argentina, predicted increase in precipitation together with rapidly melting glaciers increase the surface runoff, and thereby the transport of suspended solids to recipient lakes. Suspended solids affect the visual conditions in the water which in turn restricts visual foraging. The native fish Aplochiton zebra Jenyns, and its filter-feeding cladoceran prey, Daphnia commutata Ekman, were subjected to foraging experiments at three turbidity levels. A. zebra foraging rate was substantially reduced at naturally occurring turbidity levels and the filtering rate of D. commutata was reduced at the highest turbidity level. This indicates that Daphnia may be partly released from predation from A. zebra at the same time as it can maintain relatively high feeding rates as turbidity increases. Lower foraging rates at the same time as the metabolic demand increases, through increased temperatures, may result in larger effects on A. zebra than could be expected from increases in turbidity or temperature alone. Turbidity may, as an indirect effect of climate change, decrease planktivore foraging rates and thereby alter the interaction strength between trophic levels.},
  author       = {Jönsson, Mikael and Ranåker, Lynn and Nicolle, Alice and Ljungberg, Peter and Fagerberg, Tony and Hylander, Samuel and Jephson, Therese and Lebret, Karen and von Einem, Jessica and Hansson, Lars-Anders and Nilsson, Anders and Balseiro, Esteban and Modenutti, Beatriz},
  issn         = {0018-8158},
  keyword      = {Turbidity,Glacial melting,Foraging,Filtering rate,Visual conditions},
  language     = {eng},
  number       = {1},
  pages        = {101--108},
  publisher    = {Springer},
  series       = {Hydrobiologia},
  title        = {Glacial clay affects foraging performance in a Patagonian fish and cladoceran},
  url          = {http://dx.doi.org/10.1007/s10750-010-0557-4},
  volume       = {663},
  year         = {2011},
}