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Título: | Ecosystem metabolism in a temporary Mediterranean marsh (Doñana National Park, SW Spain) |
Autor: | Geertz-Hansen, Ole; Montes, Carlos; Duarte, Carlos M. CSIC ORCID; Sand-Jensen, K.; Marbà, Núria CSIC ORCID ; Grillas, P. | Fecha de publicación: | 2011 | Editor: | European Geosciences Union | Citación: | Biogeosciences 8: 963- 971 (2011) | Resumen: | The 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). | URI: | http://hdl.handle.net/10261/58205 | DOI: | 10.5194/bg-8-963-2011 | Identificadores: | doi: 10.5194/bg-8-963-2011 issn: 1726-4170 |
Aparece en las colecciones: | (IMEDEA) Artículos |
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