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Exploring O2 Dynamics and Metabolism in Lake Ecosystems: A Simplistic Modeling Approach

Discover the intricacies of oxygen dynamics by modeling O2 concentration variations over day and night in pelagic and littoral zones. Explore how O2 sensors, mixed layer gases, and horizontal dispersion influence gas exchange processes. Test the hypothesis that differences in Kh (eddy diffusion coefficient) impact estimations of mid-lake metabolism. Compare pelagic and whole-lake metabolism estimates at varying Kh levels. Dive into the analysis of GPP estimates along different transects to unveil insights into lake ecosystem functioning.

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Exploring O2 Dynamics and Metabolism in Lake Ecosystems: A Simplistic Modeling Approach

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  1. How simplistically can I model O2 dynamics and still learn something?

  2. Oxygen Concentration day day day night day night night Time

  3. pelagic littoral O2 sensor mixed layer

  4. gas ex. gas ex. gas ex. gas ex. RL RL RP RP RP RP O2 site 1 (littoral) O2 site 2 (littoral) O2 site n-1 (pelagic) O2 site n (pelagic) PPL PPP PPL PPp PPP PPp horizontal dispersion, Kh ??? Center of the lake Shore

  5. Model Test and Hypothesis • Examine how differences in Kh influence mid-lake estimates of whole-lake metabolism • Hypothesis: At low Kh – mid-lake sensor = pelagic metabolism At high Kh – mid-lake sensor = whole-lake metabolism

  6. Kh = .1692 m2/hr

  7. Kh = 1 m2/hr

  8. Kh = 10 m2/hr

  9. Kh = 100 m2/hr

  10. Kh = 1000 m2/hr

  11. Mid-lake estimates of GPP

  12. 80-m transect vs 1000-m transect

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