Diel and seasonal variations in bacterioplankton production in a hypertrophic shallow lagoon

Abstract

AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials AME 72:255-267 (2014) - DOI: https://doi.org/10.3354/ame01701 Diel and seasonal variations in bacterioplankton production in a hypertrophic shallow lagoon Gabriela Onandia*, Maria Rosa Miracle, Cristina Blasco, Eduardo Vicente Department of Microbiology and Ecology, ICBiBE, University of Valencia, Calle Dr. Moliner 50, 46100 Burjassot, Valencia, Spain *Corresponding author: gabriela.onandia@uv.es ABSTRACT: Diel and seasonal variations in bacterial secondary production (BP) were investigated in the hypertrophic Albufera de Valencia (Spain) by measuring 3H-leucine and 3H-thymidine incorporation rates (LIR and TIR). LIR and TIR were positively correlated. Seasonal variations in the LIR:TIR ratio seemed to be related to dissolved organic carbon (DOC) availability, with higher concentrations favoring protein synthesis. The light:dark ratio of the incorporation rates of both radiotracers was close to 1. However, this ratio tended to be >1 when DOC was lower, namely in winter. A clear diel pattern in bacterial activity was found, with an increasing trend during the night hours. The opposite diel pattern was observed for DOC. BP remained similar across seasons but showed a decrease in late winter during a period of high water discharge through the lagoon and concurrent minimum chlorophyll a concentrations. A comparison between hypertrophic systems aiming to explore the upper BP limit indicated that our BP estimates were considerably high but did not surpass previous values in hypertrophic lakes. KEY WORDS: Bacterioplankton production · Carbon flux · Shallow hypertrophic lake Full text in pdf format PreviousNextCite this article as: Onandia G, Miracle MR, Blasco C, Vicente E (2014) Diel and seasonal variations in bacterioplankton production in a hypertrophic shallow lagoon. Aquat Microb Ecol 72:255-267. https://doi.org/10.3354/ame01701 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AME Vol. 72, No. 3. Online publication date: July 10, 2014 Print ISSN: 0948-3055; Online ISSN: 1616-1564 Copyright © 2014 Inter-Research.