2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

<< BACK TO AGENDA

6/05/2017  |   11:30 AM - 11:45 AM   |  DIFFERENTIAL RETENTION OF NITROGEN AND PHOSPHORUS IN LAKES   |  306B

DIFFERENTIAL RETENTION OF NITROGEN AND PHOSPHORUS IN LAKES

As low points in the landscape, lakes integrate water and material from the surrounding landscape, and should be a reflection of their watersheds. However, lakes are variable in the stoichiometry of nitrogen (N) and phosphorus (P), even across lakes with similar watersheds. We hypothesized that variability in stoichiometry across lakes could be generated by internal, lake-specific differential retention of N and P. Nutrient retention for a given lake has been well-described by Vollenweider-type equations that show retention increases with residence time, but the underlying mechanisms and shapes of these relationships are different for N and P. An analysis of 710 lakes with published N and P budgets revealed that the most extreme lakes (shallow with short residence time, deep with long residence time) retained more N than P. However, most lakes (75%) retained more P than N, and median retention for P (38%) was nearly twice as high as N (20%). Landscape level patterns in lake stoichiometry may therefore be a function of both the chemical signatures of the surrounding landscape and lake-specific hydrology and morphology.

  • C10 Biogeochemistry
  • C24 Eutrophication
  • S19 Elements and energy as fundamental currencies of nature: using ecological stoichiometry as a tool to advance the sustainability of freshwater ecosystems

Presentation:
This presentation has not yet been uploaded.

Handouts:
Handout is not Available

Transcripts:
CART transcripts are NOT YET available, but will be posted shortly after the conference


Presenters/Authors

Samantha K Oliver (), University of Wisconsin Madison, skoliver@wisc.edu;


ASHA DISCLOSURE:

Financial -

Nonfinancial -

Emily Stanley (), University of Wisconsin - Madison, ehstanley@wisc.edu;


ASHA DISCLOSURE:

Financial -

Nonfinancial -