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How corals made rocks through the ages.

Jeana L Drake1, Tali Mass2, Jarosław Stolarski3

  • 1Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, USA.

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Summary
This summary is machine-generated.

Stony corals build reefs and record ocean conditions in their skeletons. New research clarifies how biological processes control skeleton formation, crucial for interpreting past climates and predicting future coral reef health.

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amorphous calcium carbonatearagonitebiomineralizationcalcitecalicoblastic cellscoralscrystal growthskeletal organic matrix

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Area of Science:

  • Marine Biology
  • Paleoclimatology
  • Biomineralization

Background:

  • Stony corals form reefs and their skeletons preserve marine environmental data.
  • Elemental and isotopic analysis of coral skeletons reconstructs past ocean temperature, pH, and salinity.
  • Understanding coral biomineralization is key to interpreting fossil records and predicting reef futures.

Purpose of the Study:

  • To review historical hypotheses and current understanding of stony coral skeleton formation.
  • To explain the critical role of biological processes, especially subcellular ones, in coral biomineralization.
  • To examine models of the tissue-skeleton interface, organic matrix, and biomineralization pathways.

Main Methods:

  • Literature review of historical hypotheses and current research on coral biomineralization.
  • Analysis of biological processes at the subcellular level controlling calcium carbonate skeleton formation.
  • Examination of different models including the tissue-skeleton interface and skeletal organic matrix.

Main Results:

  • Coral skeletons are not merely passive recorders; biological processes are central to their formation.
  • Subcellular biological mechanisms critically influence the structure of calcium carbonate skeletons.
  • The evolution of coral biomineralization involves complex biological controls.

Conclusions:

  • Understanding the biological control of coral biomineralization is essential for accurate paleoceanographic reconstructions.
  • This knowledge is vital for predicting coral reef responses to global change, including ocean acidification.
  • Future models of coral vulnerability must incorporate detailed biological insights into skeleton formation.