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| Titel |
Ecosystem metabolism in a temporary Mediterranean marsh (Doñana National Park, SW Spain) |
| VerfasserIn |
O. Geertz-Hansen, C. Montes, C. M. Duarte, K. Sand-Jensen, N. Marbá, P. Grillas |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 4 ; Nr. 8, no. 4 (2011-04-19), S.963-971 |
| Datensatznummer |
250005696
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| Publikation (Nr.) |
 copernicus.org/bg-8-963-2011.pdf |
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| Zusammenfassung |
| 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 = 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 = 1.58). |
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