EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/21/2018 | 12:15 PM - 12:30 PM | METABOLIC REGIME ALTERED BY TREATED WASTE WATER INPUTS IN AN INTERMITTENT STREAM | 310 A
METABOLIC REGIME ALTERED BY TREATED WASTE WATER INPUTS IN AN INTERMITTENT STREAM
Gross primary productivity (GPP) and ecosystem respiration (ER) are fundamental ecosystem functions strongly controlled by light, temperature, discharge, and nutrient and organic matter availability. Yet, little is known about the influence of these environmental factors on the metabolic regime of streams receiving nutrient and organic matter excesses from wastewater treatment plant (WWTP) effluents. For one year, we continuously measured light, temperature, and discharge upstream and downstream of a WWTP effluent in an intermittent headwater stream. Moreover, we seasonally measured one-week diel cycles of nutrient concentrations and daily stream metabolism (from dissolved oxygen concentrations). Light inputs were similar at the two sites, while higher temperature and nutrient concentrations coincided with higher ER rates at the downstream site. Differences in GPP between the two sites were small. Only at the downstream site, GPP and ER were strongly correlated and diel nutrient cycles emerged, though they were not clearly linked to stream metabolism. Our study highlights that WWTP effluent inputs alter natural diel cycles of nutrient concentration as well as the magnitude of ER of the receiving streams. These results can help to improve our understanding of metabolic regimes in urbanized headwaters.
- Urban
- Intermittent
- Oxygen
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Presenters/Authors
Susana Bernal
(), Center for Advanced Studies of Blanes (CEAB-CSIC), Spain, sbernal@ceab.csic.es;
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Anna Lupon
(), Swedish University of Agricultural Sciences, anna.lupon@slu.se;
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Jennifer Drummond
(), Center for Advanced Studies of Blanes (CEAB-CSIC), j.drummond@ceab.csic.es;
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Esperança Gacia
(), Center for Advanced Studies of Blanes (CEAB-CSIC), Spain, gacia@ceab.csic.es;
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Sara Castelar
(), Center for Advanced Studies of Blanes (CEAB-CSIC), saracastelar@hotmail.com;
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Miquel Ribot
(), Center for Advanced Studies of Blanes (CEAB-CSIC), Spain, mribot@ceab.csic.es;
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Eugènia Martí
(), Center for Advanced Studies of Blanes (CEAB-CSIC), Spain, eugenia@ceab.csic.es;
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