Responses of macroalgae to CO₂ enrichment cannot be inferred solely from their inorganic carbon uptake strategy.

ABSTRACT: Increased plant biomass is observed in terrestrial systems due to rising levels of atmospheric CO₂, but responses of marine macroalgae to CO₂ enrichment are unclear. The 200% increase in CO₂ by 2100 is predicted to enhance the productivity of fleshy macroalgae that acquire inorganic carbon solely as CO₂ (non-carbon dioxide-concentrating mechanism [CCM] species-i.e., species without a carbon dioxide-concentrating mechanism), whereas those that additionally uptake bicarbonate (CCM species) are predicted to respond neutrally or positively depending on their affinity for bicarbonate. Previous studies, however, show that fleshy macroalgae exhibit a broad variety of responses to CO₂ enrichment and the underlying mechanisms are largely unknow

SUBMITTER: van der Loos LM 

PROVIDER: S-EPMC6342131 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature