Journal article
Long-term thermal acclimation drives adaptive physiological adjustments of a marine gastropod to reduce sensitivity to climate change
The Science of the Total Environment, Vol.771, 145208
2021
PMID: 33548706
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Abstract
Ocean warming is predicted to challenge the persistence of a variety of marine organisms, especially when combined with ocean acidification. While temperature affects virtually all physiological processes, the extent to which thermal history mediates the adaptive capacity of marine organisms to climate change has been largely overlooked. Using populations of a marine gastropod (Turbo undulatus) with different thermal histories (cool vs. warm), we compared their physiological adjustments following exposure (8-week) to ocean acidification and warming. Compared to cool-acclimated counterparts, we found that warm-acclimated individuals had a higher thermal threshold (i.e. increased CT
by 2 °C), which was unaffected by the exposure to ocean acidification and warming. Thermal history also strongly mediated physiological effects, where warm-acclimated individuals adjusted to warming by conserving energy, suggested by lower respiration and ingestion rates, energy budget (i.e. scope for growth) and O:N ratio. After exposure to warming, warm-acclimated individuals had higher metabolic rates and greater energy budget due to boosted ingestion rates, but such compensatory feeding disappeared when combined with ocean acidification. Overall, we suggest that thermal history can be a critical mediator of physiological performance under future climatic conditions. Given the relatively gradual rate of global warming, marine organisms may be better able to adaptively adjust their physiology to future climate than what short-term experiments currently convey.
Details
- Title
- Long-term thermal acclimation drives adaptive physiological adjustments of a marine gastropod to reduce sensitivity to climate change
- Creators
- Jonathan Y S Leung (Author) - Faculty of Materials and Energy, Southwest University, Chongqing 400715, China; Southern Seas Ecology Laboratories, The Environment Institute, School of Biological Sciences, The University of Adelaide, South Australia, AustraliaBayden D Russell (Author) - The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Hong Kong, SAR, ChinaMelinda A Coleman (Author) - New South Wales Department of Primary Industries, Fisheries, National Marine Science Centre, 2 Bay Drive, Coffs Harbour, NSW 2450, AustraliaBrendan P Kelaher (Author) - National Marine Science Centre and Marine Ecology Research Centre, Southern Cross University, PO Box 4321, Coffs Harbour, NSW 2450, AustraliaSean D Connell (Author) - Southern Seas Ecology Laboratories, The Environment Institute, School of Biological Sciences, The University of Adelaide, South Australia, Australia. Electronic address: sean.connell@adelaide.edu.au
- Publication Details
- The Science of the Total Environment, Vol.771, 145208
- Publisher
- Netherlands
- Identifiers
- 991012922197902368
- Academic Unit
- National Marine Science Centre
- Language
- English
- Resource Type
- Journal article