Please use this identifier to cite or link to this item:
http://hdl.handle.net/10553/921
Title: | Evidence for a heterotrophic subtropical northeast Atlantic | Authors: | Duarte, Carlos M. Agustí, Susana Arístegui, Javier González, Natalia Anadón, Ricardo |
Keywords: | Plancton | Issue Date: | 2001 | Project: | LATITUD I y II (AMB94-0739, MAR 98-1676-E), CICYT PB88-0436, CICYT CANIGO (MAS3-CT96-0060) |
Journal: | Limnology and Oceanography | Abstract: | The mean (+/-SE) depth-integrated gross production (P) of 2,600 +/- 271 mg O-2 m(-2) d(-1) derived from a compilation of data from nine cruises conducted between 1991-2000 in the subtropical NE Atlantic was found to be significantly lower (t-test, P = 0.005, N = 33) than the mean (+/-SE) community respiration (R) of 3,821 +/- 276 mg O-2 m(-2) d(-1). Two-thirds of the stations investigated were heterotrophic, and the P/R ratio of the communities tended to increase as P increased, such that communities where P < 3,000 mg O-2 m(-2) d(-1) tended to be heterotrophic. The tendency for R to exceed P (P/R < 1.0) was statistically significant (Wilcoxon ranked sign test, P < 0.05) in the upper and deep layers of the photic zone, with an overall balance between P and R at intermediate depths. These results provide evidence that the subtropical NE Atlantic is a heterotrophic ecosystem, where planktonic communities respire more organic carbon than they produce, thereby acting as net sources of CO2. | URI: | http://hdl.handle.net/10553/921 | ISBN: | 243590 | ISSN: | 0024-3590 | DOI: | 10.4319/lo.2001.46.2.0425 | Source: | Limnology and Oceanography[ISSN 0024-3590],v. 46, p. 425-428 |
Appears in Collections: | Artículos |
Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.