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Strong costs and benefits of winter acclimatization in Drosophila melanogaster

Schou, Mads Fristrup LU ; Loeschcke, Volker and Kristensen, Torsten Nygaard (2015) In PLoS ONE 10(6). p.0130397-0130397
Abstract
Studies on thermal acclimation in insects are often performed on animals acclimated in the laboratory under conditions that are not ecologically relevant. Costs and benefits of acclima-tion responses under such conditions may not reflect costs and benefits in natural popula-tions subjected to daily and seasonal temperature fluctuations. Here we estimated costs and benefits in thermal tolerance limits in relation to winter acclimatization of Drosophila melanogaster. We sampled flies from a natural habitat during winter in Denmark (field flies) and compared heat and cold tolerance of these to that of flies collected from the same natu-ral population, but acclimated to 25 °C or 13 °C in the laboratory (laboratory flies). We further obtained... (More)
Studies on thermal acclimation in insects are often performed on animals acclimated in the laboratory under conditions that are not ecologically relevant. Costs and benefits of acclima-tion responses under such conditions may not reflect costs and benefits in natural popula-tions subjected to daily and seasonal temperature fluctuations. Here we estimated costs and benefits in thermal tolerance limits in relation to winter acclimatization of Drosophila melanogaster. We sampled flies from a natural habitat during winter in Denmark (field flies) and compared heat and cold tolerance of these to that of flies collected from the same natu-ral population, but acclimated to 25 °C or 13 °C in the laboratory (laboratory flies). We further obtained thermal performance curves for egg-to-adult viability of field and laboratory (25 °C) flies, to estimate possible cross-generational effects of acclimation. We found much higher cold tolerance and a lowered heat tolerance in field flies compared to laboratory flies reared at 25 °C. Flies reared in the laboratory at 13 °C exhibited the same thermal cost-benefit rela-tions as the winter acclimatized flies. We also found a cost of winter acclimatization in terms of decreased egg-to-adult viability at high temperatures of eggs laid by winter acclimatized flies. Based on our findings we suggest that winter acclimatization in nature can induce strong benefits in terms of increased cold tolerance. These benefits can be reproduced in the laboratory under ecologically relevant rearing and testing conditions, and should be in-corporated in species distribution modelling. Winter acclimatization also leads to decreased heat tolerance. This may create a mismatch between acclimation responses and the ther-mal environment, e.g. if temperatures suddenly increase during spring, under current and expected more variable future climatic conditions. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
PLoS ONE
volume
10
issue
6
pages
0130397 - 0130397
publisher
Public Library of Science
external identifiers
  • scopus:84936860590
ISSN
1932-6203
DOI
10.1371/journal.pone.0130307
language
English
LU publication?
no
id
726e0185-9c5d-47b8-92a1-ccebddec63f9
date added to LUP
2017-12-18 09:42:58
date last changed
2018-10-03 11:45:10
@article{726e0185-9c5d-47b8-92a1-ccebddec63f9,
  abstract     = {Studies on thermal acclimation in insects are often performed on animals acclimated in the laboratory under conditions that are not ecologically relevant. Costs and benefits of acclima-tion responses under such conditions may not reflect costs and benefits in natural popula-tions subjected to daily and seasonal temperature fluctuations. Here we estimated costs and benefits in thermal tolerance limits in relation to winter acclimatization of Drosophila melanogaster. We sampled flies from a natural habitat during winter in Denmark (field flies) and compared heat and cold tolerance of these to that of flies collected from the same natu-ral population, but acclimated to 25 °C or 13 °C in the laboratory (laboratory flies). We further obtained thermal performance curves for egg-to-adult viability of field and laboratory (25 °C) flies, to estimate possible cross-generational effects of acclimation. We found much higher cold tolerance and a lowered heat tolerance in field flies compared to laboratory flies reared at 25 °C. Flies reared in the laboratory at 13 °C exhibited the same thermal cost-benefit rela-tions as the winter acclimatized flies. We also found a cost of winter acclimatization in terms of decreased egg-to-adult viability at high temperatures of eggs laid by winter acclimatized flies. Based on our findings we suggest that winter acclimatization in nature can induce strong benefits in terms of increased cold tolerance. These benefits can be reproduced in the laboratory under ecologically relevant rearing and testing conditions, and should be in-corporated in species distribution modelling. Winter acclimatization also leads to decreased heat tolerance. This may create a mismatch between acclimation responses and the ther-mal environment, e.g. if temperatures suddenly increase during spring, under current and expected more variable future climatic conditions.},
  author       = {Schou, Mads Fristrup and Loeschcke, Volker and Kristensen, Torsten Nygaard},
  issn         = {1932-6203},
  language     = {eng},
  number       = {6},
  pages        = {0130397--0130397},
  publisher    = {Public Library of Science},
  series       = {PLoS ONE},
  title        = {Strong costs and benefits of winter acclimatization in Drosophila melanogaster},
  url          = {http://dx.doi.org/10.1371/journal.pone.0130307},
  volume       = {10},
  year         = {2015},
}