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Individual and population-level responses to ocean acidification

Individual and population-level responses to ocean acidification
Individual and population-level responses to ocean acidification
Ocean acidification is predicted to have detrimental effects on many marine organisms and ecological processes. Despite growing evidence for direct impacts on specific species, few studies have simultaneously considered the effects of ocean acidification on individuals (e.g. consequences for energy budgets and resource partitioning) and population level demographic processes. Here we show that ocean acidification increases energetic demands on gastropods resulting in altered energy allocation, i.e. reduced shell size but increased body mass. When scaled up to the population level, long-term exposure to ocean acidification altered population demography, with evidence of a reduction in the proportion of females in the population and genetic signatures of increased variance in reproductive success among individuals. Such increased variance enhances levels of short-term genetic drift which is predicted to inhibit adaptation. Our study indicates that even against a background of high gene flow, ocean acidification is driving individual- and population-level changes that will impact eco-evolutionary trajectories.
20194
Harvey, Ben P.
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McKeown, Niall J.
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Rastrick, Samuel P.S.
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Bertolini, Camilla
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Foggo, Andy
ec934db5-73cb-487b-8e46-885ebf727014
Graham, Helen
81ea8662-d074-4eee-ba47-2af3ac965b7c
Hall-Spencer, Jason M.
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Milazzo, Marco
c7e17c76-0010-4403-8db5-9171b923dc04
Shaw, Paul W.
c7dc5b94-1f46-4c94-86ac-296741494a9e
Small, Daniel P.
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Moore, Pippa J.
f72a6bd0-79f4-41d2-b81b-84e86fd98ff6
Harvey, Ben P.
44acf213-89fd-499e-8504-5fd2011c6f97
McKeown, Niall J.
67c54e58-7ec4-4369-88a2-d20d034f353f
Rastrick, Samuel P.S.
62b436ef-1b93-41ba-b7d1-80c2ce0bc467
Bertolini, Camilla
6a302236-94b4-463c-8a9d-d96997902f71
Foggo, Andy
ec934db5-73cb-487b-8e46-885ebf727014
Graham, Helen
81ea8662-d074-4eee-ba47-2af3ac965b7c
Hall-Spencer, Jason M.
9c75292a-0735-43a5-add1-2359f6b5b083
Milazzo, Marco
c7e17c76-0010-4403-8db5-9171b923dc04
Shaw, Paul W.
c7dc5b94-1f46-4c94-86ac-296741494a9e
Small, Daniel P.
0af3d55f-80ab-40fe-8260-8b16c31fceed
Moore, Pippa J.
f72a6bd0-79f4-41d2-b81b-84e86fd98ff6

Harvey, Ben P., McKeown, Niall J., Rastrick, Samuel P.S., Bertolini, Camilla, Foggo, Andy, Graham, Helen, Hall-Spencer, Jason M., Milazzo, Marco, Shaw, Paul W., Small, Daniel P. and Moore, Pippa J. (2016) Individual and population-level responses to ocean acidification. Scientific Reports, 6, 20194. (doi:10.1038/srep20194).

Record type: Article

Abstract

Ocean acidification is predicted to have detrimental effects on many marine organisms and ecological processes. Despite growing evidence for direct impacts on specific species, few studies have simultaneously considered the effects of ocean acidification on individuals (e.g. consequences for energy budgets and resource partitioning) and population level demographic processes. Here we show that ocean acidification increases energetic demands on gastropods resulting in altered energy allocation, i.e. reduced shell size but increased body mass. When scaled up to the population level, long-term exposure to ocean acidification altered population demography, with evidence of a reduction in the proportion of females in the population and genetic signatures of increased variance in reproductive success among individuals. Such increased variance enhances levels of short-term genetic drift which is predicted to inhibit adaptation. Our study indicates that even against a background of high gene flow, ocean acidification is driving individual- and population-level changes that will impact eco-evolutionary trajectories.

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Published date: 29 January 2016
Organisations: Ocean and Earth Science

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Local EPrints ID: 390059
URI: http://eprints.soton.ac.uk/id/eprint/390059
PURE UUID: 4d3bd265-66f4-4c40-9034-39667a072648

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Date deposited: 17 Mar 2016 14:55
Last modified: 27 Apr 2022 06:19

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Contributors

Author: Ben P. Harvey
Author: Niall J. McKeown
Author: Samuel P.S. Rastrick
Author: Camilla Bertolini
Author: Andy Foggo
Author: Helen Graham
Author: Jason M. Hall-Spencer
Author: Marco Milazzo
Author: Paul W. Shaw
Author: Daniel P. Small
Author: Pippa J. Moore

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