2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2018 | 3:00 PM - 3:15 PM | METABOLIC REGIMES OF THE SUSQUEHANNA RIVER: CONTROLS ON VARIABILITY AT DIFFERENT TEMPORAL SCALES | 420 A
METABOLIC REGIMES OF THE SUSQUEHANNA RIVER: CONTROLS ON VARIABILITY AT DIFFERENT TEMPORAL SCALES
We explored metabolic regimes of two 7th order rivers, West and North Branches of the Susquehanna River (WBSR, NBSR) in central Pennsylvania using data collected over eight years. Inverse modeling was used to select daily rates of gross primary production (GPP), respiration (ER), and reaeration (K) that produced the best statistical fit between modeled and measured diel oxygen data. Our data yielded over 2000 metabolism days for each river, which enabled us to analyze annual metabolic regimes for both rivers. Harmonic series showed periodicity in GPP over 730 days, 121 days, and 81 days in WBSR and over 365 days, 91 days, and 66 days in NBSR. ER showed aseasonal periodicity in both rivers. Periodicity in metabolism at different time scales was related to short-term hydrologic disturbances, seasonal patterns in hydrology, temperature, and light availability, and interannual hydrologic differences (i.e. wet years vs. dry years). Overall, net ecosystem production (NEP) was positive in WBSR but negative in NBSR. Despite being similar in size, these rivers might be acting differently with respect to atmospheric CO2 and could represent the metabolic transition from net autotrophic to net heterotrophic river reaches.
- Primary Production
- Ecosystem
- Oxygen
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
Matthew McTammany
(), Bucknell University, mmctamma@bucknell.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Katharine Faulkner
(), Bucknell University, krf007@bucknell.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -