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Net ecosystem metabolism in a micro-tidal estuary (Randers Fjord, Denmark): Evaluation of methods

Autor Gazeau, Frédéric; Borges, Alberto Vieira; Barrón, Cristina; Duarte, Carlos M. ; Iversen, Niels; Middelburg, Jack J.; Delille, Bruno; Pizay, Marie-Dominique; Frankignoulle, Michel; Gattuso, Jean-Pierre
Fecha de publicación 2005
EditorInter Research
Citación Marine Ecology - Progress Series 301: 23-41 (2005)
ResumenThe metabolic status, the difference between organic matter production and consumption of an estuary (Randers Fjord, Denmark) has been assessed based on 2 field cruises in April and August 2001 and a number of approaches: (1) the oxygen (O2) incubation method, (2) dissolved inorganic carbon (DIC) budgets, (3) the response surface difference (RSD) method based on diel O 2 changes and (4) land-ocean interaction in the coastal zone (LOICZ) budgets based on dissolved inorganic phosphorus (DIP). Although each method has its own associated limitations and uncertainties, the above approaches converged most of the time in consistent metabolic estimates, both in sign and magnitude, and revealed that this system was near metabolic balance in spring (net ecosystem production: NEP ∼ 0) and net heterotrophic in summer (NEP ∼ -50 mmol C m-2 d-1). In this shallow estuary (mean depth = 1.6 m), the benthic compartment was very active and represented 70 and 30 % of the total gross primary production in April and August, respectively. NEP rates measured during this study are in the range of previously reported rates in estuaries. © Inter-Research 2005.
Versión del editorhttp://dx.doi.org/10.3354/meps301023
URI http://hdl.handle.net/10261/89677
Identificadoresissn: 0171-8630
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