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| Titel |
Temperature dependence of planktonic metabolism in the subtropical North Atlantic Ocean |
| VerfasserIn |
L. S. García-Corral, E. Barber, A. Regaudie-de-Gioux, S. Sal, J. M. Holding, S. Agustí  , N. Navarro, P. Serret, P. Mozetič, C. M. Duarte |
| 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 ; 11, no. 16 ; Nr. 11, no. 16 (2014-08-27), S.4529-4540 |
| Datensatznummer |
250117565
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| Publikation (Nr.) |
 copernicus.org/bg-11-4529-2014.pdf |
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| Zusammenfassung |
| The temperature dependence of planktonic metabolism in the subtropical North
Atlantic Ocean was assessed on the basis of measurements of gross primary
production (GPP), community respiration (CR) and net community production
(NCP), as well as experimental assessments of the response of CR to
temperature manipulations. Metabolic rates were measured at 68 stations along
three consecutive longitudinal transects completed during the Malaspina 2010
Expedition, in three different seasons. Temperature gradients were observed
in depth and at basin and seasonal scale. The results showed seasonal
variability in the metabolic rates, the highest rates being observed during
the spring transect. The overall mean integrated GPP / CR ratio was
1.39 ± 0.27 decreasing from winter to summer, and the NCP for the
subtropical North Atlantic Ocean during the cruises exhibits net autotrophy
(NCP > 0) in about two-thirds (66%) of the total sampled
communities. Also, we reported the activation energies describing the
temperature dependence of planktonic community metabolism, which was generally
higher for CR than for GPP in the subtropical North Atlantic Ocean, as
the metabolic theory of ecology predicts. Furthermore, we made a comparison
of activation energies describing the responses to in situ temperature in the
field (EaCR = 1.64 ± 0.36 eV) and those derived experimentally
by temperature manipulations (EaCR = 1.45 ± 0.6 eV), which
showed great consistency. |
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