Plankton community metabolism in the subtropical and tropical ocean, Malaspina 2010 Expedition


Here we assess the temperature dependence of the metabolic rates (gross primary production - GPP, community respiration - CR and the ratio GPP/CR) of oceanic plankton communities. We compile data from 133 stations of the Malaspina 2010 Expedition, distributed among the subtropical and tropical Atlantic, Pacific and Indian oceans. We used the in vitro technique to measured metabolic rates during 24 h incubations at three different sampled depths: surface, 20% and 1% of the photosynthetically active radiation measured at surface. We also measured the % of ultraviolet B radiation (UVB) penetrating at surface waters. GPP and CR rates increased with warming, albeit different responses were observed for each sampled depth. The overall GPP/CR ratio declined with warming. Higher activation energies (Ea's) were derived for both processes (GPPChla = 0.97; CRChla = 1.26; CRHPA= 0.95 eV) compared to those previously reported. The Indian Ocean showed the highest Ea (GPPChla = 1.70; CRChla = 1.48; CRHPA= 0.57 eV), while the Atlantic Ocean showed the lowest (GPPChla = 0.86; CRChla = 0.77; CRHPA= -0.13 eV). We believe that the difference between previous assessments and the ones presented here can be explained by the overrepresentation of Atlantic communities in the previous data sets. We found that UVB radiation also affects the temperature dependence of surface GPP, which decreased rather than increased under high levels of UVB. Ocean warming, which causes stratification and oligotrophication of the subtropical and tropical oceans, may lead to reduced surface GPP as a result of increased penetration of UVB radiation.

Supplement to: García-Corral, Lara S; Holding, Johnna; Carrillo-de-Albornoz, Paloma; Steckbauer, Alexandra; Pérez-Lorenzo, Maria; Navarro, Nuria; Serret, Pablo; Gasol, Josep M; Morán, Xosé Anxelu G; Estrada, Marta; Fraile-Nuez, Eugenio; Benítez-Barrios, Verónica M; Agustí, Susana; Duarte, Carlos Manuel (2017): Temperature dependence of plankton community metabolism in the subtropical and tropical ocean. Global Biogeochemical Cycles, 31(7), 1141-1154

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Creator García-Corral, Lara S ORCID logo; Holding, Johnna ORCID logo; Carrillo-de-Albornoz, Paloma; Steckbauer, Alexandra ORCID logo; Pérez-Lorenzo, Maria; Navarro, Nuria ORCID logo; Serret, Pablo ORCID logo; Gasol, Josep M ORCID logo; Morán, Xosé Anxelu G ORCID logo; Estrada, Marta ORCID logo; Fraile-Nuez, Eugenio ORCID logo; Benítez-Barrios, Verónica M; Agustí, Susana ORCID logo; Duarte, Carlos Manuel ORCID logo
Publisher PANGAEA
Publication Year 2017
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 3905 data points
Discipline Earth System Research
Spatial Coverage (-2.450W, -40.530S, 3.715E, 32.085N); Canarias Sea; South Atlantic Ocean; Indian Ocean; Tasman Sea; South Pacific Ocean; North Pacific Ocean; Caribbean Sea
Temporal Coverage Begin 2010-12-19T00:00:00Z
Temporal Coverage End 2011-07-10T00:00:00Z