Physiological responses of Caulerpa spp. (with different dissolved inorganic carbon physiologies) to ocean acidification ...

• Main Authors: Taise, Aleluia, Krieger, Erik, Bury, Sarah J., Cornwall, Christopher E.
• Format: Text
• Language: unknown
• Published: Taylor & Francis 2023
• Subjects: Evolutionary Biology; FOS Biological sciences; Environmental Sciences not elsewhere classified; Chemical Sciences not elsewhere classified; Ecology; Biological Sciences not elsewhere classified; Developmental Biology; Inorganic Chemistry; FOS Chemical sciences; New Zealand; Ocean acidification
• Online Access: https://dx.doi.org/10.6084/m9.figshare.24872144; https://tandf.figshare.com/articles/journal_contribution/Physiological_responses_of_i_Caulerpa_i_spp_with_different_dissolved_inorganic_carbon_physiologies_to_ocean_acidification/24872144

Caulerpa is a widely distributed genus of chlorophytes (green macroalgae) which are important for their dietary, social and coastal ecosystem value. Ocean acidification (OA) threatens the future of marine ecosystems, favouring macroalgal species that could benefit from increased seawater carbon dioxide (CO 2 ) concentrations. Most macroalgae species possess CO 2 concentrating mechanisms (CCMs) that allow active uptake of bicarbonate (HCO 3 − ). Those species without CCMs are restricted to using CO 2 , which is currently the least abundant species of dissolved inorganic carbon (DIC) in seawater. Thus, macroalgae without CCMs are predicted to be likely benefit from OA. Caulerpa is one of the rare few genera that have species both with and without CCMs. The two most common Caulerpa species in New Zealand are C. geminata (possesses a CCM) and C. brownii (non-CCM). We investigated the responses of growth, photo-physiology and DIC utilisation of C. geminata and C. brownii to four mean seawater pH treatments (8.03, ...