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Larval bivalve shell morphometry: a new paleoclimatic tool?

R A Lutz, D Jablonski

    Science (New York, N.Y.)
    |October 6, 1978
    PubMed
    Summary
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    Bivalve larval shells can indicate past climate changes. Warmer waters correlate with smaller larval shell sizes, offering a new method for paleoclimate reconstruction.

    Area of Science:

    • Paleoclimatology
    • Marine Biology
    • Malacology

    Background:

    • Bivalve mollusks are widespread marine organisms.
    • Larval shell morphology can be influenced by environmental factors.

    Purpose of the Study:

    • To investigate the potential of bivalve larval shells as paleoclimatic indicators.
    • To establish a relationship between marine temperature and larval shell dimensions.

    Main Methods:

    • Analysis of Recent bivalve species.
    • Measurement of larval shell dimensions, specifically the prodissoconch-dissoconch boundary.

    Main Results:

    • An inverse relationship was observed between ambient temperature and maximum larval shell size.
    • Changes in shell dimensions correlate with temperature fluctuations.

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    Conclusions:

    • Bivalve larval shells, particularly the prodissoconch-dissoconch boundary, serve as reliable paleoclimatic proxies.
    • This method offers a novel approach to reconstructing past marine temperatures.