Department

Physiology

First Advisor

Robert Hall

Second Advisor

Hilary Madinger

Description

Freshwater ecosystems vary in their photosynthesis and respiration rates resulting in variable metabolism by season. To measure the stream metabolism (gross primary production and ecosystem respiration) we collected dissolved oxygen concentration every ten minutes using a minidot logger. We used diel variation in oxygen concentration to calculate gross primary production and ecosystem respiration. Using statistical modeling, we calculated the metabolism for each day to derive a time series of each. We also calculated average metabolism each month to look at the seasonality of metabolisms. December of 2016 we had a GPP of 0.85 gO2m-2d-1 July of 2017 we calculated a GPP of 7.89 gO2m-2d-1. After deciphering the data we were able to see that the creek has higher GPP in the summer months than during winter.

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Annual Metabolism of Spring, Creek Wyoming

Freshwater ecosystems vary in their photosynthesis and respiration rates resulting in variable metabolism by season. To measure the stream metabolism (gross primary production and ecosystem respiration) we collected dissolved oxygen concentration every ten minutes using a minidot logger. We used diel variation in oxygen concentration to calculate gross primary production and ecosystem respiration. Using statistical modeling, we calculated the metabolism for each day to derive a time series of each. We also calculated average metabolism each month to look at the seasonality of metabolisms. December of 2016 we had a GPP of 0.85 gO2m-2d-1 July of 2017 we calculated a GPP of 7.89 gO2m-2d-1. After deciphering the data we were able to see that the creek has higher GPP in the summer months than during winter.