Details:

Journal Title:
Ecological Applications
Personal Author:
Donelan, Sarah C. ; Breitburg, Denise ; Ogburn, Matthew B.
Donelan, Sarah C. ; Breitburg, Denise ; Ogburn, Matthew B. Less -
NOAA Program & Office:
Sea Grant ; OAR (Oceanic and Atmospheric Research)
Sea Grant ; OAR (Oceanic and Atmospheric Research) Less -
Sea Grant Program:
MDU (Maryland Sea Grant)
Description:
Organisms are increasingly likely to be exposed to multiple stressors repeatedly across ontogeny as climate change and other anthropogenic stressors intensify. Early life stages can be particularly sensitive to environmental stress, such that experiences early in life can "carry over" to have long-term effects on organism fitness. Despite the potential importance of these within-generation carryover effects, we have little understanding of how they vary across ecological contexts, particularly when organisms are re-exposed to the same stressors later in life. In coastal marine systems, anthropogenic nutrients and warming water temperatures are reducing average dissolved oxygen (DO) concentrations while also increasing the severity of naturally occurring daily fluctuations in DO. Combined effects of warming and diel-cycling DO can strongly affect the fitness and survival of coastal organisms, including the eastern oyster (Crassostrea virginica), a critical ecosystem engineer and fishery species. However, whether early life exposure to hypoxia and warming affects oysters' subsequent response to these stressors is unknown. Using a multiphase laboratory experiment, we explored how early life exposure to diel-cycling hypoxia and warming affected oyster growth when oysters were exposed to these same stressors 8 weeks later. We found strong, interactive effects of early life exposure to diel-cycling hypoxia and warming on oyster tissue : shell growth, and these effects were context-dependent, only manifesting when oysters were exposed to these stressors again two months later. This change in energy allocation based on early life stress exposure may have important impacts on oyster fitness. Exposure to hypoxia and warming also influenced oyster tissue and shell growth, but only later in life. Our results show that organisms' responses to current stress can be strongly shaped by their previous stress exposure, and that context-dependent carryover effects may influence the fitness, production, and restoration of species of management concern, particularly for sessile species such as oysters.
Keywords:
[+]
Aquaculture Cimatic Changes Conservation Oysters
Source:
Ecological Applications 31( 4):e02315
DOI:
https://doi.org/10.1002/eap.2315
Document Type:
Journal Article
Funding:
Grant no. NA14OAR4170090
Place as Subject:
Chesapeake Bay (Md. and Va.)
Rights Information:
CC BY-NC-ND
Compliance:
Submitted
Main Document Checksum:
[+]
urn:sha256:0791b5a3e8f4fa0e79dc469cbdce258dbed97510cd3028a5dfe50fc3cfb04bb9
Download URL:
https://repository.library.noaa.gov/view/noaa/47227/noaa_47227_DS1.pdf
File Type:

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