The release of dissolved organic carbon as a result of diatom fragmentation during feeding by Mysis relicta

  • Michael E. Sierszen
  • Arthur S. Brooks
Part of the Developments in Hydrobiology book series (DIHY, volume 10)


The release of dissolved organic carbon (DOC) by Mysis relicta that occurs while feeding may be an important pathway in the recycling of nutrients in Lake Michigan. Laboratory experiments were conducted to determine the levels of DOC released by M. relicta from Lake Michigan while grazing on laboratory-cultured diatoms. Increasing filtering rates were observed at progressively lower chlorophyll concentrations. Higher filtering rates were accompanied by higher fragmentation of diatoms and a higher concomitant release of DOC from broken cells. While the amount of DOC release is small (0.02−3.30 μg C·1−1 · h−1), it nonetheless is of importance to bacteria and possibly some algae. After assimilation by bacteria and algae, the organic carbon is then available to consumers.


Mysidacea Mysis relicta dissolved organic carbon fragmentation grazing recycling 


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Copyright information

© Dr W. Junk Publishers, The Hague 1982

Authors and Affiliations

  • Michael E. Sierszen
    • 1
  • Arthur S. Brooks
    • 1
  1. 1.Center for Great Lakes StudiesThe University of Wisconsin-MilwaukeeMilwaukeeUSA

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