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| Main Authors: | , , , , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Journal of phycology
2025
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/41283763/ |
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Table of Contents:
- Helicosphaera carteri (Prymnesiophyceae) under high carbon dioxide: An experimental study. Bianco, Stefania Bordiga, Manuela Langer, Gerald Ziveri, Patrizia Cerino, Federica Relitti, Federica Laudicella, Vincenzo Alessandro Di Giulio, Andrea Lupi, Claudia Carbon Dioxide Haptophyta Seawater Hydrogen-Ion Concentration Carbon Carbon Cycle The coccolithophore Helicosphaera carteri is an understudied, yet ecologically and biogeochemically important, marine calcifier. Hence, its response to ocean acidification has implications for ecosystem function and the marine carbon cycle. Here we employed dilute batch cultures featuring a coupled C-system manipulation (295, 444, and 600 μatm CO) to analyze the response of H. carteri in terms of growth rate and particulate carbon production, two key eco-physiological and biogeochemical parameters. We highlight that both growth rate and organic carbon production are CO limited at 295 µatm but are not proton inhibited at 600 µatm of CO. This finding, combined with the maintenance of a stable inorganic production rate, places H. carteri among the coccolithophores less sensitive to seawater acidification. In addition, we tested a widely applied assumption underpinning the determination of carbon production, namely the constancy of particulate carbon quotas over the course of a dilute batch culture. We determined that the assumption holds true, an important validation of a method used in many publications.