2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2018 | 11:30 AM - 11:45 AM | STOICHIOMETRY OF N, P, AND SILICA LOADING TO THE WESTERN BASIN OF LAKE ERIE: HYDROLOGICAL CONTROLS AND LIMNOLOGICAL IMPLICATIONS | 420 B
STOICHIOMETRY OF N, P, AND SILICA LOADING TO THE WESTERN BASIN OF LAKE ERIE: HYDROLOGICAL CONTROLS AND LIMNOLOGICAL IMPLICATIONS
The indicator of coastal eutrophication potential (ICEP) estimates the amount of non-siliceous algal production that could be supported by nitrogen (N) or phosphorus (P) available in excess of the stoichiometric requirement of diatoms. It often is viewed as a predictor of the occurrence and intensity of cyanobacterial blooms. We calculated ICEP using long-term (1975-2015) records of N, P, and silica (as Si) loads from the Maumee River, the major source of nutrients to the western basin of Lake Erie. Throughout the 40-year period of record, N inputs were far in excess of the N:Si ratio of 16:20 required by diatoms; lowest N:Si ratios occurred in drought years (e.g., 1988, 2012). The P:Si ratio also exceeded diatom requirements, but to a lesser degree than N:Si. The relationship between ICEP and average annual discharge indicated that flow conditions affected N and P loads far more than Si loads. Using the cyanobacterial index for the western basin of Lake Erie, we tested the ability of the ICEP to explain inter-annual variation in the abundance of cyanobacteria. Unexpectedly, ICEP was not correlated to the cyanobacterial index on an annual time scale.
- Nutrients
- Hydrology
- Algae
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
Todd V. Royer
(), Indiana University Bloomington, troyer@indiana.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Lienne Sethna
(), Indiana University, lsethna@iu.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
James Hood
(), The Ohio State University, hood.211@osu.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -