Energetic response of Atlantic surfclam Spisula solidissima to ocean acidification

Highlights

  • Surfclam energy budget is decreased by high ρCO2 concentration.
  • High ρCO2 concentration affects negatively surfclam clearance rate.
  • Surfclams adopt different metabolic strategies facing ocean acidification.
  • Metabolic loss rises after a moderate ρCO2 concentration increase.

Abstract

In this study, we assessed the Atlantic surfclam (Spisula solidissima) energy budget under different ocean acidification conditions (OA). During 12 weeks, 126 individuals were maintained at three different ρCO2 concentrations. Every two weeks, individuals were sampled for physiological measurements and scope for growth (SFG). In the high ρCO2 treatment, clearance rate decreased and excretion rate increased relative to the low ρCO2 treatment, resulting in reduced SFG. Moreover, oxygen:nitrogen (O:N) excretion ratio dropped, suggesting that a switch in metabolic strategy occurred. The medium ρCO2 treatment had no significant effects upon SFG; however, metabolic loss increased, suggesting a rise in energy expenditure. In addition, a significant increase in food selection efficiency was observed in the medium treatment, which could be a compensatory reaction to the metabolic over-costs. Results showed that surfclams are particularly sensitive to OA; however, the different compensatory mechanisms observed indicate that they are capable of some temporary resilience.

Pousse E., Poach M. E., Redman D. H., Sennefelder G., White L. E., Lindsay J. M., Munroe D., Hart D., Hennen D., Dixon M. S., Li Y., Wikfors G. H., & Meseck S. L., 2020. Energetic response of Atlantic surfclam Spisula solidissima to ocean acidification. Marine Pollution Bulletin 161 (Part B): 111740. doi: 10.1016/j.marpolbul.2020.111740. Article (subscription required).

0 Responses to “Energetic response of Atlantic surfclam Spisula solidissima to ocean acidification”



  1. Leave a Comment

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.




Subscribe to the RSS feed

Powered by FeedBurner

Follow AnneMarin on Twitter

Blog Stats

  • 1,401,370 hits

OA-ICC HIGHLIGHTS

Ocean acidification in the IPCC AR5 WG II

OUP book

Archives