Nutrient enrichment regulates the growth and physiological responses of Saccharina japonica to ocean acidification

Environmental changes, such as ocean acidification and eutrophication, have created threats to kelp mariculture. In this study, the growth, photosynthesis, respiration and nutrient composition of Saccharina japonica were evaluated at different levels of pCO2 (400 and 800 μL L−1) and nutrients (nutrient-enriched and non-enriched seawater). Elevated pCO2 decreased the relative growth rate (RGR), net photosynthetic rate and contents of tissue carbon and tissue nitrogen under non-enriched nutrient conditions, but it had no significant effect on these parameters under nutrient-enriched conditions. The dark respiration rate was positively affected by elevated pCO2 regardless of the nutrient conditions. However, the C:N was unaffected by elevated pCO2 at both nutrient levels. These results implied that ocean acidification could reduce the production and nutrient contents in the tissues of S. japonica, which was associated with nutrient conditions.

Chu Y., Liu Y., Li J., Wang Q. & Gong Q., in press. Nutrient enrichment regulates the growth and physiological responses of Saccharina japonica to ocean acidification. Journal of Ocean University of China. Article (subscription required).

0 Responses to “Nutrient enrichment regulates the growth and physiological responses of Saccharina japonica 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

  • 1,358,498 hits

OA-ICC HIGHLIGHTS

Ocean acidification in the IPCC AR5 WG II

OUP book