HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Gale, P. M. Articles by Reddy, K. R. Search for Related Content PubMed Articles by Gale, P. M. Articles by Reddy, K. R. Agricola Articles by Gale, P. M. Articles by Reddy, K. R.

Carbon Flux between Sediment and Water Column of a Shallow, Subtropical, Hypereutrophic Lake

Soil and Water Science Dep., P.O. Box 110510, Univ. of Florida, Institute of Food and Agric. Science, Gainesville, FL 32611.

^* Corresponding author.

ABSTRACT

Field and laboratory experiments were conducted to measure forms, storages, and flux of C in the water-sediment colunm of a shallow, subtropical, hypereutrophic lake. High gross primary productivity in the lake (1.4 ± 0.3 kg C m^–2 yr^–1) was not significantly correlated with any water chemistry parameters measured. This suggested that the phytoplankton community was functioning at maximum levels and under nutrient nonlimiting conditions. Major C input to the lake is through gross primary productivity, of which 90% is lost through heterotrophic and microbial respiration processes within the water column. Resuspension of the bottom sediments was a major input of C into the water column, contributing 720 g C m^–2 yr^–1. In comparison, diffusive flux of dissolved organic C from the sediment was minimal (1.2 g C m^–2 yr^–1), as were external inputs into the water column (20 g C m^–2 yr^–1). High productivity of this system has resulted in a net accumulation of C (as sediments) of 118 g C m^–2 yr^–1.

Contribution of the Florida Agric. Exp. Stn. Journal Ser. no. R-03291.

Received for publication August 16, 1993.

This article has been cited by other articles:

				J. Song, Y. Luo, Q. Zhao, and P. Christie Microcosm Studies on Anaerobic Phosphate Flux and Mineralization of Lake Sediment Organic Carbon J. Environ. Qual., November 1, 2004; 33(6): 2353 - 2356. [Abstract] [Full Text] [PDF]