2022 Early Hearing Detection & Intervention Virtual Conference

March 13 - 15, 2022

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5/26/2021  |   8:30 AM - 10:30 AM   |  DISSOLVED ORGANIC CARBON: A LINK TO VITAL PROCESSES IN STREAMS AND LAKES   |  Virtual Platform

DISSOLVED ORGANIC CARBON: A LINK TO VITAL PROCESSES IN STREAMS AND LAKES

Dissolved organic carbon (DOC) is a key component of the carbon cycle in aquatic systems and is essential for understanding aquatic ecosystem metabolism and functioning. However, higher levels of recent atmospheric deposition of DOC is causing increased staining, or browning, to occur in freshwater systems. Chromophoric dissolved organic material (CDOM) can be used to explain the optical properties of organic carbon. It is known for having a strong relationship with total DOC in many systems and has been used as a proxy for DOC in other studies. The objectives of this study were to determine the range in DOC and CDOM quantity in streams and lakes in the Northern Highlands region of the Midwest and to assess any differences in trends between the two system types. Sampling a variety of stained and unstained systems, we predicted a wide range in DOC and CDOM with a positive relationship between the two parameters. Additional spectrophotometric properties of water samples were analyzed. Overall, DOC ranged from 3.01-25.01 mg/L, and CDOM ranged from 4.25-32.29 mg/L. In both streams and lakes, the relationship between DOC, CDOM, and other spectrophotometric properties was highly linear.

  • Carbon cycle
  • Biogeochemistry
  • Nutrient cycling

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Presenters/Authors

Vanessa Czeszynski (), River Studies Center and Department of Biology, University of Wisconsin – La Crosse, czeszyns.vanessa@uwlax.edu;


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Eric Strauss (), River Studies Center and Department of Biology, University of Wisconsin – La Crosse, estrauss@uwlax.edu;


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