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Related Experiment Video

Updated: Jun 21, 2026

Fundamental Technical Elements of Freeze-fracture/Freeze-etch in Biological Electron Microscopy
11:17

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Published on: September 11, 2014

Nitrogen source for a detritivore: detritus substrate versus associated microbes.

S Findlay, K Tenore

    Science (New York, N.Y.)
    |October 22, 1982
    PubMed
    Summary

    Marine worms like Capitella capitata can absorb nutrients directly from seaweed detritus. However, they rely on microbes for nutrition when consuming marsh grass detritus, challenging previous assumptions about detritivore feeding.

    Area of Science:

    • Marine Biology
    • Ecology
    • Zoology

    Background:

    • Detritivores were traditionally believed to obtain all nutrition from associated microbes on detritus.
    • The nonliving plant material (substrate) was not considered a direct nutrient source.

    Purpose of the Study:

    • To investigate the nitrogen sources for the polychaete Capitella capitata when feeding on different types of detritus.
    • To determine if Capitella capitata can utilize the plant substrate directly for nutrition.

    Main Methods:

    • Feeding Capitella capitata with detritus derived from seaweed.
    • Feeding Capitella capitata with detritus derived from marsh grass.
    • Analyzing nitrogen sources utilized by the polychaete.

    Main Results:

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    • Capitella capitata derived a significant portion of its nitrogen from the seaweed plant substrate.
    • Microbes served as the primary nitrogen source when Capitella capitata consumed marsh grass detritus.

    Conclusions:

    • Capitella capitata exhibits dietary flexibility, utilizing both plant substrate and microbes for nutrition.
    • The source of detritus influences the primary nutritional strategy of this polychaete species.