Plasticity in organic composition maintains biomechanical performance in shells of juvenile scallops exposed to altered temperature and pH conditions

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dc.contributor.authorLagos, Nelson A.
dc.contributor.authorBenítez, Samanta
dc.contributor.authorGrenier, Cristian
dc.contributor.authorRodriguez-Navarro, Alejandro B.
dc.contributor.authorGarcía-Herrera, Claudio
dc.contributor.authorAbarca-Ortega, Aldo
dc.contributor.authorVivanco, Juan F.
dc.contributor.authorBenjumeda, Isabel
dc.contributor.authorVargas, Cristian A.
dc.contributor.authorDuarte, Cristian
dc.contributor.authorLardies, Marco A.
dc.date.accessioned2023-06-15T20:01:07Z
dc.date.available2023-06-15T20:01:07Z
dc.date.issued2021-12
dc.descriptionIndexación: Scopuses
dc.description.abstractThe exposure to environmental variations in pH and temperature has proven impacts on benthic ectotherms calcifiers, as evidenced by tradeoffs between physiological processes. However, how these stressors affect structure and functionality of mollusk shells has received less attention. Episodic events of upwelling of deep cold and low pH waters are well documented in eastern boundary systems and may be stressful to mollusks, impairing both physiological and biomechanical performance. These events are projected to become more intense, and extensive in time with ongoing global warming. In this study, we evaluate the independent and interactive effects of temperature and pH on the biomineral and biomechanical properties of Argopecten purpuratus scallop shells. Total organic matter in the shell mineral increased under reduced pH (~ 7.7) and control conditions (pH ~ 8.0). The periostracum layer coating the outer shell surface showed increased protein content under low pH conditions but decreasing sulfate and polysaccharides content. Reduced pH negatively impacts shell density and increases the disorder in the orientation of calcite crystals. At elevated temperatures (18 °C), shell microhardness increased. Other biomechanical properties were not affected by pH/temperature treatments. Thus, under a reduction of 0.3 pH units and low temperature, the response of A. purpuratus was a tradeoff among organic compounds (biopolymer plasticity), density, and crystal organization (mineral plasticity) to maintain shell biomechanical performance, while increased temperature ameliorated the impacts on shell hardness. Biopolymer plasticity was associated with ecophysiological performance, indicating that, under the influence of natural fluctuations in pH and temperature, energetic constraints might be critical in modulating the long-term sustainability of this compensatory mechanism.es
dc.description.urihttps://www.nature.com/articles/s41598-021-03532-0
dc.identifier.citationScientific Reports. Volume 11, Issue 1. December 2021. Article number 24201es
dc.identifier.doi10.1038/s41598-021-03532-0
dc.identifier.issn2045-2322
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/50766
dc.language.isoenes
dc.publisherNature Researches
dc.rights.licenseAtribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectEcologyes
dc.subjectOcean Scienceses
dc.subjectMaintains Biomechanical
dc.subjectTemperature
dc.titlePlasticity in organic composition maintains biomechanical performance in shells of juvenile scallops exposed to altered temperature and pH conditionses
dc.typeArtículoes
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