IADO   05364
INSTITUTO ARGENTINO DE OCEANOGRAFIA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Estimation of ecosystem metabolism from high frequency data in a saline shallow lake: La Salada (Argentina).
Autor/es:
ALFONSO, M.B.; VITALE, A.J.; MENENDEZ, M.C.; PERILLO, V.L.; PICCOLO, M.C.; PERILLO, G.M.E.
Lugar:
Orford
Reunión:
Workshop; Global Lake Ecological Observatory Network 16 (GLEON 16).; 2014
Institución organizadora:
GLEON
Resumen:
Continuous monitoring of changes in dissolved oxygen concentration (DO) allows the estimation of ecosystem metabolism and provides a measure of the overall activity of an ecosystem, summarizing the biogeochemical and trophic processes, and determining the efficiency of resource processing. The aim of this study was to determine the temporal dynamics and regulation of the ecosystem metabolism in a saline shallow lake, La Salada, located in the South of Buenos Aires Province, Argentina. We estimate net ecosystem production (NEP), cosystem/community respiration (R), and gross primary production (GPP) rates, in relation to physico-­‐chemical and climatic variables for 18 months. Net autotrophic conditions prevailed during the study period (NEP=64.05±44.22mmolO2m-­‐2). Annual and interannual variation of water level seems to be a major factor influencing the ecological processes in the system, as well as temperature and conductivity due to evapoconcentration. GPP and R followed a similar pattern over time, with GPP over R, implying that La Salada is a very productive ecosystem and produces significantly more organic material than it is able to degrade. The excess may either be exported to adjacent systems and/or accumulate within the system.