Things I'm Working On

Currently, we have a profiler attached to a water intake at Richland Chambers Reservoir in northeast TX that takes depth profiles of temperature, pH, conductivity, and dissolved oxygen concentrations every two hours. We are collecting profiles of dissolved nitrogen gas samples, particulate carbon, nitrogen, phosphorus, and chlorophyll-a to monitor changes in nitrogen saturation levels with respect to the atmosphere, controls on N2 saturation, and model estimated net N2 fluxes using a revised wind-based model.

Studying how bottom water oxygen concentrations affect dissolved and total sediment nutrient release or uptake in both summer and winter in 8 different reservoirs in Oklahoma that vary in regards to trophic status. Dissolved oxygen is the main control of redox cycling at the sediment-water interface, and winter limnological studies in southern reservoirs are rare even though ice over isn’t a factor. We hope to detect general seasonal changes in reactive and total nitrogen and phosphorus dynamics. 

Publications

  • Boedecker, A. R., Taylor, J. M., Tappenbeck, T. H., Hall Jr., R. O., Robbins, C. J., & Scott, J. T. (in review). Evaluating O2:Ar, N2:Ar, and 29,30N2 using Membrane Inlet Mass Spectrometry configured to minimize oxygen interference. Limnology and Oceanography Methods.
  • Hoffman, D. K., McCarthy, M. J., Boedecker, A. R., Myers, J. A., & Newell, S. E. (2022). The role of internal nitrogen loading in supporting non‐N‐fixing harmful cyanobacterial blooms in the water column of a large eutrophic lake. Limnology and Oceanography, 67(9), 2028-2041. https://doi.org/10.1002/lno.12185
  • Boedecker, A. R., Niewinski, D. N., Newell, S. E., Chaffin, J. D., & McCarthy, M. J. (2020). Evaluating sediments as an ecosystem service in western Lake Erie via quantification of nutrient cycling pathways and selected gene abundances. Journal of Great Lakes Research, 46(4), 920-932. https://doi.org/10.1016/j.jglr.2020.04.010
  • Wagner N.D., Osburn F.S., Wang J., Taylor R.B., Boedecker A.R., Chambliss C.K., et al. (2019). Biological stoichiometry regulates toxin production in microcystis aeruginosa (UTEX 2385). Toxins 11.  https://doi.org/10.3390/toxins111006