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Photosynthetic community responses to upwelling in mesoscale eddies in the subtropical North Atlantic and Pacific Oceans

Photosynthetic community responses to upwelling in mesoscale eddies in the subtropical North Atlantic and Pacific Oceans
Photosynthetic community responses to upwelling in mesoscale eddies in the subtropical North Atlantic and Pacific Oceans
In this paper we summarise the photo-physiological responses of phytoplankton to upwelling of macronutrients in mesoscale eddies in the subtropical North Atlantic (EDDIES project, Sargasso Sea) and subtropical North Pacific (E-FLUX project, Hawaii). The observations, obtained on two sets of cruises over 2 years, occupied six cyclonic eddies and two mode-water eddies. The photosynthetic physiological parameters were measured using a bench-top fluorescence induction and relaxation (FIRe) system and a submersible in situ fast repetition rate fluorometer (FRRF) deployed on an undulating towed vehicle. Both of these instruments were used to provide highly sensitive and well-resolved data on community responses. The responses are dependent on both the type of eddy and its stage of development. Our results indicate that, while cyclonic eddies in the Atlantic and Pacific can increase primary photosynthetic production early in their development, mode-water eddies in the subtropical North Atlantic can support patchy blooms of large diatoms for long periods of time (more than 3 months).
oceanic eddies, phytoplankton, physiology, fluorescence
0967-0645
1310-1320
Bibby, Thomas S.
e04ea079-dd90-4ead-9840-00882de27ebd
Gorbunov, Maxim Y.
c7db3a18-269a-4cde-bcc2-c6e097d6a49a
Wyman, Kevin W.
62bbd638-ac91-4666-be1f-84beeb968739
Falkowski, Paul G.
d2805085-f0d9-4a6a-bf40-0b8a71dc8ea9
Bibby, Thomas S.
e04ea079-dd90-4ead-9840-00882de27ebd
Gorbunov, Maxim Y.
c7db3a18-269a-4cde-bcc2-c6e097d6a49a
Wyman, Kevin W.
62bbd638-ac91-4666-be1f-84beeb968739
Falkowski, Paul G.
d2805085-f0d9-4a6a-bf40-0b8a71dc8ea9

Bibby, Thomas S., Gorbunov, Maxim Y., Wyman, Kevin W. and Falkowski, Paul G. (2008) Photosynthetic community responses to upwelling in mesoscale eddies in the subtropical North Atlantic and Pacific Oceans. [in special issue: Mesoscale Physical-Biological-Biogeochemical Linkages in the Open Ocean: Results from the E-FLUX and EDDIES Programs] Deep Sea Research Part II: Topical Studies in Oceanography, 55 (10-13), 1310-1320. (doi:10.1016/j.dsr2.2008.01.014).

Record type: Article

Abstract

In this paper we summarise the photo-physiological responses of phytoplankton to upwelling of macronutrients in mesoscale eddies in the subtropical North Atlantic (EDDIES project, Sargasso Sea) and subtropical North Pacific (E-FLUX project, Hawaii). The observations, obtained on two sets of cruises over 2 years, occupied six cyclonic eddies and two mode-water eddies. The photosynthetic physiological parameters were measured using a bench-top fluorescence induction and relaxation (FIRe) system and a submersible in situ fast repetition rate fluorometer (FRRF) deployed on an undulating towed vehicle. Both of these instruments were used to provide highly sensitive and well-resolved data on community responses. The responses are dependent on both the type of eddy and its stage of development. Our results indicate that, while cyclonic eddies in the Atlantic and Pacific can increase primary photosynthetic production early in their development, mode-water eddies in the subtropical North Atlantic can support patchy blooms of large diatoms for long periods of time (more than 3 months).

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More information

Published date: May 2008
Keywords: oceanic eddies, phytoplankton, physiology, fluorescence

Identifiers

Local EPrints ID: 63916
URI: https://eprints.soton.ac.uk/id/eprint/63916
ISSN: 0967-0645
PURE UUID: 5cb8c5c1-1acb-40d6-a80c-6e08f6982cbd

Catalogue record

Date deposited: 18 Nov 2008
Last modified: 13 Mar 2019 20:23

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