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Related Experiment Video

Updated: Feb 28, 2026

Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm
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Variability in magnesium content in Arctic echinoderm skeletons.

A Iglikowska1, J Najorka2, A Voronkov3

  • 1Marine Ecology Department, Institute of Oceanology Polish Academy of Sciences, Powstańców Warszawy 55, 81-712, Sopot, Poland.

Marine Environmental Research
|June 19, 2017
PubMed
Summary

Magnesium (Mg) concentration in Arctic echinoderm skeletons varies by species and class, indicating biological control over Mg incorporation. Environmental factors appear less influential than intrinsic biological mechanisms.

Keywords:
Arctic calcifiersAsteroideaBarents seaCrinoideaEchinoideaHolothuroideaMg-calciteOcean acidificationOphiuroideaSkeletal magnesium

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Area of Science:

  • Marine Biology
  • Biogeochemistry
  • Echinoderm Ecology

Background:

  • Echinoderm skeletons exhibit variable magnesium (Mg) content.
  • Understanding Mg incorporation is key to interpreting paleoenvironmental proxies.
  • Arctic echinoderms inhabit unique environmental conditions influencing skeletal composition.

Purpose of the Study:

  • To quantify Mg concentration variation in Arctic echinoderm skeletons.
  • To determine if Mg levels are driven by biological or environmental factors.
  • To identify patterns of Mg variation across echinoderm classes and species.

Main Methods:

  • Compiled 235 Mg concentration measurements from 30 Arctic echinoderm species.
  • Analyzed skeletal samples from 216 specimens collected in the Barents Sea.
  • Compared Mg content across different echinoderm classes (asteroids, ophiuroids, crinoids, holothuroids, echinoids).

Main Results:

  • Mg concentration was characteristic for echinoderm classes and often species-specific.
  • Asteroids showed the highest Mg content, followed by ophiuroids, crinoids, and holothuroids.
  • Echinoids exhibited the lowest Mg concentrations among the studied groups.

Conclusions:

  • Biological factors significantly control Mg incorporation into echinoderm skeletons.
  • Skeletal Mg content is a reliable indicator of echinoderm class and species.
  • These findings have implications for using echinoderms as paleoenvironmental indicators.