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Statistical decomposition of passive and active phenotypic plasticity in traits under homeostatic regulation.

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Title: Statistical decomposition of passive and active phenotypic plasticity in traits under homeostatic regulation.
Authors: Einum, Sigurd1 (AUTHOR), Burton, Tim2 (AUTHOR)
Source: Evolution. Apr2026, Vol. 80 Issue 4, p812-822. 11p.
Subjects: Phenotypic plasticity, Homeostasis, Ions, Aquatic organisms, Osmolality, Phylogeny, Physiology
Abstract: Traits subject to homeostatic regulation exhibit both active and passive phenotypic plasticity, where trait dynamics are shaped by passive effects of the environment and active physiological regulation. We present a model that decomposes the temporal dynamics of such traits into parameters that describe the passive effect of the environment, the rate at which active regulation is adjusted (i.e. rate of plasticity), and the asymptotic magnitude of active regulation (i.e. capacity for plasticity). We apply this model to a dataset comprising 653 experiments documenting time-course changes in ion concentrations and osmolality of aquatic organisms following salinity shifts. Our model captures the diversity of trait responses, and meta-analyses reveal strong phylogenetic signals in all three parameters. Ray-finned fishes had faster regulatory responses, weaker passive plasticity (i.e. diffusion), and greater magnitude of active regulation than crustaceans. Trait-specific differences were also evident. Active regulation of magnesium was faster and of larger magnitude than the other ions and osmolality, implying strong selection for precise regulation of magnesium, which may play a key role in several physiological pathways. By disentangling the passive vs. active components of homeostatic trait regulation, our approach provides new opportunities for studying novel ecological and evolutionary aspects of phenotypic plasticity. [ABSTRACT FROM AUTHOR]
Copyright of Evolution is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 192797394
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PubTypeId: academicJournal
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  Data: Statistical decomposition of passive and active phenotypic plasticity in traits under homeostatic regulation.
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  Data: <searchLink fieldCode="JN" term="%22Evolution%22">Evolution</searchLink>. Apr2026, Vol. 80 Issue 4, p812-822. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Phenotypic+plasticity%22">Phenotypic plasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Homeostasis%22">Homeostasis</searchLink><br /><searchLink fieldCode="DE" term="%22Ions%22">Ions</searchLink><br /><searchLink fieldCode="DE" term="%22Aquatic+organisms%22">Aquatic organisms</searchLink><br /><searchLink fieldCode="DE" term="%22Osmolality%22">Osmolality</searchLink><br /><searchLink fieldCode="DE" term="%22Phylogeny%22">Phylogeny</searchLink><br /><searchLink fieldCode="DE" term="%22Physiology%22">Physiology</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Traits subject to homeostatic regulation exhibit both active and passive phenotypic plasticity, where trait dynamics are shaped by passive effects of the environment and active physiological regulation. We present a model that decomposes the temporal dynamics of such traits into parameters that describe the passive effect of the environment, the rate at which active regulation is adjusted (i.e. rate of plasticity), and the asymptotic magnitude of active regulation (i.e. capacity for plasticity). We apply this model to a dataset comprising 653 experiments documenting time-course changes in ion concentrations and osmolality of aquatic organisms following salinity shifts. Our model captures the diversity of trait responses, and meta-analyses reveal strong phylogenetic signals in all three parameters. Ray-finned fishes had faster regulatory responses, weaker passive plasticity (i.e. diffusion), and greater magnitude of active regulation than crustaceans. Trait-specific differences were also evident. Active regulation of magnesium was faster and of larger magnitude than the other ions and osmolality, implying strong selection for precise regulation of magnesium, which may play a key role in several physiological pathways. By disentangling the passive vs. active components of homeostatic trait regulation, our approach provides new opportunities for studying novel ecological and evolutionary aspects of phenotypic plasticity. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Evolution is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1093/evolut/qpag009
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 11
        StartPage: 812
    Subjects:
      – SubjectFull: Phenotypic plasticity
        Type: general
      – SubjectFull: Homeostasis
        Type: general
      – SubjectFull: Ions
        Type: general
      – SubjectFull: Aquatic organisms
        Type: general
      – SubjectFull: Osmolality
        Type: general
      – SubjectFull: Phylogeny
        Type: general
      – SubjectFull: Physiology
        Type: general
    Titles:
      – TitleFull: Statistical decomposition of passive and active phenotypic plasticity in traits under homeostatic regulation.
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            NameFull: Einum, Sigurd
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            NameFull: Burton, Tim
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            – D: 01
              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
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              Value: 80
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            – TitleFull: Evolution
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