Response of Juvenile Saccharina japonica to the Combined Stressors of Elevated pCO₂ and Excess Copper.

ABSTRACT: Coastal macroalgae may be subjected to global and local environmental stressors, such as ocean acidification and heavy-metal pollution. We investigated the growth, photosynthetic characteristics, and biochemical compositions of juvenile sporophytes of Saccharina japonica cultivated at two pCO₂ levels (400 and 1000 ppmv) and four copper concentrations (natural seawater, control; 0.2 μM, low level; 0.5 μM, medium level; and 1 μM, high level) to better understand how macroalgae respond to ongoing environmental changes. The results showed that the responses of juvenile S. japonica to copper concentrations depended on the pCO₂ level. Under the 400 ppmv condition, medium and high copper concentrations significantly decreased the relative growth rate (RGR) and

SUBMITTER: Zhang W 

PROVIDER: S-EPMC10005686 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature