Abstract
Many tributaries feeding streams are connected to ponds that heat up during summer months; however, the influence of these ponds on receiving stream temperature was not known. Stream temperature affects microfauna and fish habitats in aquatic ecosystems. Three tributaries with headwater ponds exposed to sunlight and one tributary unassociated with a large, upstream pond were selected for study within the Pennypack Creek watershed in the Philadelphia Metropolitan Area. Temperature loggers were installed in the pond (when applicable), associated tributary, and in the Pennypack Creek up and downstream of its confluence with the tributary. Although diurnal temperature fluctuations were apparent, the study showed no significant differences in temperature up and downstream of tributary discharge to Pennypack Creek. Pond water temperatures were up to 4°C warmer than the Pennypack Creek; however, temperatures downstream and upstream of the tributaries leading out of the ponds were within 1°C of each other.
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Acknowledgements
Thanks to the William Penn Foundation for funding this study, and to the project director Jeff Featherstone of the Temple University Center for Sustainable Communities.
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Ham, J., Toran, L. & Cruz, J. Effect of upstream ponds on stream temperature. Environ Geol 50, 55–61 (2006). https://doi.org/10.1007/s00254-006-0186-4
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DOI: https://doi.org/10.1007/s00254-006-0186-4