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Predation life history responses to increased temperature variability

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barbosa2014pone0107971.pdf (470.5Kb)
Date
24/09/2014
Author
Barbosa, Miguel
Pestana, Joao
Soares, Amadeu M. V. M.
Keywords
Daphnia-magna
Population-dynamics
Inducible defenses
Climate-change
Evolution
Traits
Risk
Fish
Food
Metabolism
QH301 Biology
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Abstract
The evolution of life history traits is regulated by energy expenditure, which is, in turn, governed by temperature. The forecasted increase in temperature variability is expected to impose greater stress to organisms, in turn influencing the balance of energy expenditure and consequently life history responses. Here we examine how increased temperature variability affects life history responses to predation. Individuals reared under constant temperatures responded to different levels of predation risk as appropriate: namely, by producing greater number of neonates of smaller sizes and reducing the time to first brood. In contrast, we detected no response to predation regime when temperature was more variable. In addition, population growth rate was slowest among individuals reared under variable temperatures. Increased temperature variability also affected the development of inducible defenses. The combined effects of failing to respond to predation risk, slower growth rate and the miss-match development of morphological defenses supports suggestions that increased variability in temperature poses a greater risk for species adaptation than that posed by a mean shift in temperature.
Citation
Barbosa , M , Pestana , J & Soares , A M V M 2014 , ' Predation life history responses to increased temperature variability ' , PLoS ONE , vol. 9 , no. 9 , e107971 . https://doi.org/10.1371/journal.pone.0107971
Publication
PLoS ONE
Status
Peer reviewed
DOI
https://doi.org/10.1371/journal.pone.0107971
ISSN
1932-6203
Type
Journal article
Rights
(C) 2014 Barbosa et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Description
This study was funded by a Postdoctoral fellowship to MB (SFRH/BPD/82259/2011) Fundacao para a Ciencia e Tecnologia (www.fct.pt/index.phtml.pt) and with a ‘‘Bolsista CAPES/BRASIL’’, (Project A058/2013) to AMVMS.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5822

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