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Título

Ecosystem metabolism in a temporary Mediterranean marsh (Doñana National Park, SW Spain)

AutorGeertz-Hansen, Ole; Montes, Carlos; Duarte, Carlos M. CSIC ORCID; Sand-Jensen, K.; Marbà, Núria CSIC ORCID ; Grillas, P.
Fecha de publicación2011
EditorEuropean Geosciences Union
CitaciónBiogeosciences 8: 963- 971 (2011)
ResumenThe metabolic balance of the open waters supporting submerged macrophytes of the Doñana marsh (SW Spain) was investigated in spring, when community production is highest. The marsh community (benthic + pelagic) was net autotrophic with net community production rates averaging 0.61 g C m -2 d-1, and gross production rates exceeding community respiration rates by, on average, 43%. Net community production increased greatly with increasing irradiance, with the threshold irradiance for communities to become net autotrophic ranging from 42 to 255 μE m -2 s-1, with net heterotrophic at lower irradiance. Examination of the contributions of the benthic and the pelagic compartments showed the pelagic compartment to be strongly heterotrophic (average P/R ratio Combining double low line 0.27), indicating that the metabolism of the pelagic compartment is highly subsidised by excess organic carbon produced in the strongly autotrophic benthic compartment (average P/R Combining double low line 1.58). © 2011 Author(s).
URIhttp://hdl.handle.net/10261/58205
DOI10.5194/bg-8-963-2011
Identificadoresdoi: 10.5194/bg-8-963-2011
issn: 1726-4170
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