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Temperature and resource availability may interactively affect over-wintering success of juvenile fish in a changing climate.

Brodersen, Jakob LU ; Rodriguez-Gil, José Luis; Jönsson, Mikael LU ; Hansson, Lars-Anders LU ; Brönmark, Christer LU ; Nilsson, Anders LU ; Nicolle, Alice LU and Berglund, Olof LU (2011) In PLoS ONE 6(10).
Abstract
The predicted global warming may affect freshwater systems at several organizational levels, from organism to ecosystem. Specifically, in temperate regions, the projected increase of winter temperatures may have important effects on the over-winter biology of a range of organisms and especially for fish and other ectothermic animals. However, temperature effects on organisms may be directed strongly by resource availability. Here, we investigated whether over-winter loss of biomass and lipid content of juvenile roach (Rutilus rutilus) was affected by the physiologically relatively small (2-5°C) changes of winter temperatures predicted by the Intergovernmental Panel on Climate Change (IPCC), under both natural and experimental conditions.... (More)
The predicted global warming may affect freshwater systems at several organizational levels, from organism to ecosystem. Specifically, in temperate regions, the projected increase of winter temperatures may have important effects on the over-winter biology of a range of organisms and especially for fish and other ectothermic animals. However, temperature effects on organisms may be directed strongly by resource availability. Here, we investigated whether over-winter loss of biomass and lipid content of juvenile roach (Rutilus rutilus) was affected by the physiologically relatively small (2-5°C) changes of winter temperatures predicted by the Intergovernmental Panel on Climate Change (IPCC), under both natural and experimental conditions. This was investigated in combination with the effects of food availability. Finally, we explored the potential for a correlation between lake temperature and resource levels for planktivorous fish, i.e., zooplankton biomass, during five consecutive winters in a south Swedish lake. We show that small increases in temperature (+2°C) affected fish biomass loss in both presence and absence of food, but negatively and positively respectively. Temperature alone explained only a minor part of the variation when food availability was not taken into account. In contrast to other studies, lipid analyses of experimental fish suggest that critical somatic condition rather than critical lipid content determined starvation induced mortality. Our results illustrate the importance of considering not only changes in temperature when predicting organism response to climate change but also food-web interactions, such as resource availability and predation. However, as exemplified by our finding that zooplankton over-winter biomass in the lake was not related to over-winter temperature, this may not be a straightforward task. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
PLoS ONE
volume
6
issue
10
publisher
Public Library of Science
external identifiers
  • wos:000295968700003
  • pmid:21998627
  • scopus:80053585033
ISSN
1932-6203
DOI
10.1371/journal.pone.0024022
project
CAnMove
BECC
language
English
LU publication?
yes
id
d4303d00-616c-4c4c-800b-165a48648fd9 (old id 2200513)
date added to LUP
2011-11-10 16:26:57
date last changed
2017-10-01 04:10:12
@article{d4303d00-616c-4c4c-800b-165a48648fd9,
  abstract     = {The predicted global warming may affect freshwater systems at several organizational levels, from organism to ecosystem. Specifically, in temperate regions, the projected increase of winter temperatures may have important effects on the over-winter biology of a range of organisms and especially for fish and other ectothermic animals. However, temperature effects on organisms may be directed strongly by resource availability. Here, we investigated whether over-winter loss of biomass and lipid content of juvenile roach (Rutilus rutilus) was affected by the physiologically relatively small (2-5°C) changes of winter temperatures predicted by the Intergovernmental Panel on Climate Change (IPCC), under both natural and experimental conditions. This was investigated in combination with the effects of food availability. Finally, we explored the potential for a correlation between lake temperature and resource levels for planktivorous fish, i.e., zooplankton biomass, during five consecutive winters in a south Swedish lake. We show that small increases in temperature (+2°C) affected fish biomass loss in both presence and absence of food, but negatively and positively respectively. Temperature alone explained only a minor part of the variation when food availability was not taken into account. In contrast to other studies, lipid analyses of experimental fish suggest that critical somatic condition rather than critical lipid content determined starvation induced mortality. Our results illustrate the importance of considering not only changes in temperature when predicting organism response to climate change but also food-web interactions, such as resource availability and predation. However, as exemplified by our finding that zooplankton over-winter biomass in the lake was not related to over-winter temperature, this may not be a straightforward task.},
  articleno    = {e24022},
  author       = {Brodersen, Jakob and Rodriguez-Gil, José Luis and Jönsson, Mikael and Hansson, Lars-Anders and Brönmark, Christer and Nilsson, Anders and Nicolle, Alice and Berglund, Olof},
  issn         = {1932-6203},
  language     = {eng},
  number       = {10},
  publisher    = {Public Library of Science},
  series       = {PLoS ONE},
  title        = {Temperature and resource availability may interactively affect over-wintering success of juvenile fish in a changing climate.},
  url          = {http://dx.doi.org/10.1371/journal.pone.0024022},
  volume       = {6},
  year         = {2011},
}