Ocean acidification decreases mussel byssal attachment strength and induces molecular byssal responses

Ocean acidification (OA) is a term describing the uptake of CO2 from the atmosphere, decreasing seawater pH and altering carbonate chemistry. Mussels are an ecologically and economically important taxon that attach to solid surfaces via the byssus. To date, little is known about the effects of OA on mussel byssal attachment and the underlying molecular byssal responses. This study demonstrated that after 1 wk of exposure to acidified seawater, both mechanical properties (such as strength and extensibility) and the numbers of byssal threads produced by Mytilus coruscus were significantly reduced, leading to a 60 to 65% decrease in mussel byssal attachment strength. Real-time PCR results suggested that OA also altered the expression of genes encoding the proximal thread matrix protein (PTMP), precursor collagen proteins (preCOL-P, -NG and -D) and mussel foot proteins (mfp-1, -2, -3, -4, -5 and -6). The down-regulation of some specific byssal proteins may be one of the reasons for the weakened mechanical properties of individual byssal threads under OA conditions. In contrast, the up-regulation of some other specific byssal proteins may be adaptive responses to minimize the adverse effect of OA on byssal attachment. OA may weaken mussel byssal attachment by reducing the production and mechanical properties of byssal threads and by inducing byssal molecular responses. The weakened byssal attachment induced by OA therefore could pose a substantial threat to both mussel aquaculture and mussel-bed ecosystems.

Zhao X., Guo C., Han Y., Che Z., Wang Y., Wang X., Chai X., Wu H. & Liu G., 2017. Ocean acidification decreases mussel byssal attachment strength and induces molecular byssal responses. Marine Ecology Progress Series 565:67-77. Article (subscription required).

0 Responses to “Ocean acidification decreases mussel byssal attachment strength and induces molecular byssal responses”



  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 )

Twitter picture

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

Facebook photo

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

Google+ photo

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

Connecting to %s




Subscribe to the RSS feed

Powered by FeedBurner

Follow AnneMarin on Twitter

Blog Stats

  • 984,072 hits

OA-ICC HIGHLIGHTS

Ocean acidification in the IPCC AR5 WG II

OUP book