IADO   05364
INSTITUTO ARGENTINO DE OCEANOGRAFIA
Unidad Ejecutora - UE
artículos
Título:
Estimation of ecosystem metabolism from diel oxygen technique in a saline shallow lake: La Salada (Argentina)
Autor/es:
MARIA BELEN ALFONSO; ALEJANDRO J. VITALE; MARIA CLARA MENENDEZ; VANESA LILIANA PERILLO; MARıA CINTIA PICCOLO; GERARDO MIGUEL EDUARDO PERILLO
Revista:
HYDROBIOLOGIA
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2014 vol. 736 p. 223 - 237
ISSN:
0018-8158
Resumen:
Studies based on continuous monitoring ofdiel changes in dissolved oxygen concentration allowthe estimation of ecosystem metabolism and provide ameasure of the overall trophic processes of anecosystem. In this study, net ecosystem production(NEP), community/ecosystem respiration (R), andgross primary production (GPP) rates were estimatedin relation to physicochemical and climatic variablesfor 18 months in La Salada, a saline shallow lake. Netautotrophic conditions prevailed during the studyperiod (NEP: 64.05 ± 44.22 mmol O2 m-2 day-1).GPP and R were positively correlated and weresynchronized on a daily timescale, with GPP typicallygreater than R. Principal component analysis revealedthat monthly rates of GPP, R, and NEP responded, asexpected, to temperature and light seasonal patterns.Water level and conductivity fluctuations, because ofevapoconcentration and water management, wererelevant as a driver of the physicochemical andbiological characteristics of the lake. In saline lakesas La Salada, an adequate management of waterresources will be relevant to maintain the ecosystemequilibrium and the quality of its resources.