Evaluating the ability of macroalgae to create a chemical refuge for bivalves under ocean acidification conditions in closed-environment experiments

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dc.contributor.authorLeal, Pablo P.
dc.contributor.authorUribe, Daniela
dc.contributor.authorHenriquez-Antipa, Luis A.
dc.contributor.authorJimenez, Carolina
dc.contributor.authorHormazabal, Luna
dc.contributor.authorCascales, Emma-Karin
dc.date.accessioned2025-01-20T17:09:40Z
dc.date.available2025-01-20T17:09:40Z
dc.date.issued2024
dc.description.abstractOcean acidification (OA) can impact aquaculture because reduced pH may negatively affect the calcification in bivalve species. Photosynthetic activity can naturally generate an OA buffering effect, favouring the calcification process by increasing the surrounding seawater pH. Therefore, the incorporation of macroalgae into bivalve farms may be a strategy to mitigate the impacts of acidification on the industry. In this study, we evaluated the modification of seawater chemistry by the metabolic activity of the blue mussel Mytilus chilensis and three macroalgae (Ulva sp., Chondracanthus chamissoi and Macrocystis pyrifera), in monocultures and co-cultures under ambient and acidified initial conditions in three closed-environment experiments. In all three experiments, photosynthesis and respiration modulated seawater chemistry, resulting in higher values of pH, oxygen concentrations, and aragonite saturation state (Omega(Ara)) in macroalgal monocultures compared to mussel monoculture. In co-cultures, pH, oxygen concentrations and Omega(Ara) were higher than in mussel monoculture but lower than in macroalgal monoculture. In co-cultures, the OA buffering effect (pH > 7.7, Omega(Ara) > 1) was observed during daytime, but unfavourable conditions for calcification were observed during nighttime. These results are species-specific, with a greater capacity for pH increase for Ulva sp. and Ch. chamissoi and limited capacity for M. pyrifera in both initial pH treatments. Results of the enclosed environment experiments indicate that the presence of macroalgae in co-cultures did not guarantee favourable conditions for mussel calcification in acidified conditions.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s10811-023-03163-0
dc.identifier.eissn1573-5176
dc.identifier.issn0921-8971
dc.identifier.urihttps://doi.org/10.1007/s10811-023-03163-0
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91062
dc.identifier.wosidWOS:001137654300002
dc.issue.numero3
dc.language.isoen
dc.pagina.final1575
dc.pagina.inicio1561
dc.revistaJournal of applied phycology
dc.rightsacceso restringido
dc.subjectAquaculture
dc.subjectPhotosynthesis
dc.subjectReduced pH
dc.subjectSeaweeds
dc.subjectShellfish
dc.subject.ods13 Climate Action
dc.subject.ods14 Life Below Water
dc.subject.odspa13 Acción por el clima
dc.subject.odspa14 Vida submarina
dc.titleEvaluating the ability of macroalgae to create a chemical refuge for bivalves under ocean acidification conditions in closed-environment experiments
dc.typeartículo
dc.volumen36
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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