Photosynthesis, respiration and reaeration in a stream with complex dissolved oxygen pattern and temperature dependence

Juan Carlos Correa-González, Ma. del Carmen Chávez-Parga, José Apolinar Cortés and Ricardo Miguel Pérez-Munguía

Ecological Modelling, 2014, vol. 273, issue C, 220-227

Abstract: Dissolved oxygen (DO) concentration and temperature were measured at high frequency over a five day period in Río Chiquito, a suburban shallow stream, in a protected area of environmental relevance in central western Mexico. The diel DO curve showed a complex pattern having two defined night sections deviating from the usual behavior described in the literature. Instead of using a single method, weighted averages for photosynthesis and respiration rates and the reaeration rate coefficient were estimated with selected approaches involving three DO mass balance diel curve methods. Results indicate that Río Chiquito is a heterotrophic system moderately affected by organic wastes from non-point sources, highly aerated and with high respiration and photosynthetic rates during winter. DO dynamics was modeled with good concordance to experimental data for the complete deployment period. Modeling results showed temperature dependence of the three key processes. However, the complex DO pattern could not be accurately described solely with temperature correction functions. In addition to temperature variation, topography, pulse loads, temperature coefficient issues and wind speed changes are discussed as possible factors of influence on DO dynamics.

Keywords: Dissolved oxygen dynamics modeling; Diel curve; Mass balance methods; Stream metabolism; Temperature; Reaeration (search for similar items in EconPapers)
Date: 2014
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0304380013005668
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:273:y:2014:i:c:p:220-227

DOI: 10.1016/j.ecolmodel.2013.11.018

Access Statistics for this article

Ecological Modelling is currently edited by Brian D. Fath

More articles in Ecological Modelling from Elsevier
Bibliographic data for series maintained by Catherine Liu ().