Next Article in Journal
New Kunitz-Type HCRG Polypeptides from the Sea Anemone Heteractis crispa
Next Article in Special Issue
Interactions between Carotenoids from Marine Bacteria and Other Micronutrients: Impact on Stability and Antioxidant Activity
Previous Article in Journal
Diatom-Specific Oligosaccharide and Polysaccharide Structures Help to Unravel Biosynthetic Capabilities in Diatoms
Previous Article in Special Issue
A Phospholipid-Protein Complex from Antarctic Krill Reduced Plasma Homocysteine Levels and Increased Plasma Trimethylamine-N-Oxide (TMAO) and Carnitine Levels in Male Wistar Rats
Article Menu

Export Article

Open AccessArticle
Mar. Drugs 2015, 13(10), 6019-6037; doi:10.3390/md13106019

Ocean Warming and CO2-Induced Acidification Impact the Lipid Content of a Marine Predatory Gastropod

1
Marine Ecology Research Center, School of Environment, Science and Engineering, Southern Cross University, P.O. Box 157, Lismore, NSW 2480, Australia
2
National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW 2450, Australia
3
Southern Cross Plant Science, Southern Cross University, Lismore, NSW 2480, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Gilles Barnathan
Received: 12 June 2015 / Revised: 8 September 2015 / Accepted: 14 September 2015 / Published: 24 September 2015
(This article belongs to the Special Issue Marine Lipids)
View Full-Text   |   Download PDF [339 KB, uploaded 24 September 2015]   |  

Abstract

Ocean warming and acidification are current global environmental challenges impacting aquatic organisms. A shift in conditions outside the optimal environmental range for marine species is likely to generate stress that could impact metabolic activity, with consequences for the biosynthesis of marine lipids. The aim of this study was to investigate differences in the lipid content of Dicathais orbita exposed to current and predicted future climate change scenarios. The whelks were exposed to a combination of temperature and CO2-induced acidification treatments in controlled flowthrough seawater mesocosms for 35 days. Under current conditions, D. orbita foot tissue has an average of 6 mg lipid/g tissue, but at predicted future ocean temperatures, the total lipid content dropped significantly, to almost half. The fatty acid composition is dominated by polyunsaturated fatty acids (PUFA 52%) with an n-3:6 fatty acid ratio of almost 2, which remains unchanged under future ocean conditions. However, we detected an interactive effect of temperature and pCO2 on the % PUFAs and n-3 and n-6 fatty acids were significantly reduced by elevated water temperature, while both the saturated and monounsaturated fatty acids were significantly reduced under increased pCO2 acidifying conditions. The present study indicates the potential for relatively small predicted changes in ocean conditions to reduce lipid reserves and alter the fatty acid composition of a predatory marine mollusc. This has potential implications for the growth and survivorship of whelks under future conditions, but only minimal implications for human consumption of D. orbita as nutritional seafood are predicted. View Full-Text
Keywords: marine lipids; ocean climate change; Dicathais orbita; polyunsaturated fatty acids; n-3; n-6; plasmalogens marine lipids; ocean climate change; Dicathais orbita; polyunsaturated fatty acids; n-3; n-6; plasmalogens
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Valles-Regino, R.; Tate, R.; Kelaher, B.; Savins, D.; Dowell, A.; Benkendorff, K. Ocean Warming and CO2-Induced Acidification Impact the Lipid Content of a Marine Predatory Gastropod. Mar. Drugs 2015, 13, 6019-6037.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Mar. Drugs EISSN 1660-3397 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top