ORBi: Harlay Jérôme - Biogeochemistry of a late coccolithophorid bloom at the continental margin of the Bay of Biscay

Reference : Biogeochemistry of a late coccolithophorid bloom at the continental margin of the Bay of...


	Document type :	Scientific congresses and symposiums : Poster
	Discipline(s) :	Life sciences : Aquatic sciences & oceanology Life sciences : Environmental sciences & ecology
	To cite this reference:	http://hdl.handle.net/2268/80974

Title :	Biogeochemistry of a late coccolithophorid bloom at the continental margin of the Bay of Biscay
Language :	English
Author, co-author :	Harlay, Jérôme [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique >]
	De Bodt, Caroline [Laboratoire d’Océanographie Chimique et Géochimie des Eaux, Faculté des Sciences, Université Libre de Bruxelles, B-1050 Brussels, Belgium > > > >]
	d'Hoop, Quentin [Laboratoire d’Océanographie Chimique et Géochimie des Eaux, Faculté des Sciences, Université Libre de Bruxelles, B-1050 Brussels, Belgium > > > >]
	Roevros, Nathalie [Laboratoire d’Océanographie Chimique et Géochimie des Eaux, Faculté des Sciences, Université Libre de Bruxelles, B-1050 Brussels, Belgium > > > >]
	Borges, Alberto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique >]
	Delille, Bruno [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique >]
	Suykens, Kim [Unité d’Océanographie Chimique, Université de Liège, B-4000 Liège, Belgium > > > >]
	Van Oostende, Nicolas [Protistologie & Aquatische Ecologie, Universiteit Gent, B-9000 Gent, Belgium > > > >]
	Sabbe, Koen [Protistologie & Aquatische Ecologie, Universiteit Gent, B-9000 Gent, Belgium > > > >]
	Piontek, Judith [Alfred Wegener Institute for Polar and Marine Research, D-27515 Bremerhaven, Germany > > > >]
	Händel, Nicole [Alfred Wegener Institute for Polar and Marine Research, D-27515 Bremerhaven, Germany > > > >]
	Schmidt, Sabine [EPOC, UMR 5805, Université Bordeaux 1, Talence, France > > > >]
	Groom, Steve [Remote Sensing Group, Plymouth Marine Laboratory, Plymouth PL1 3DH, United Kingdom > > > >]
	Engel, Anja [Alfred Wegener Institute for Polar and Marine Research, D-27515 Bremerhaven, Germany > > > >]
	Chou, Lei [Laboratoire d’Océanographie Chimique et Géochimie des Eaux, Faculté des Sciences, Université Libre de Bruxelles, B-1050 Brussels, Belgium > > > >]
Publication date :	2-Jul-2007
On invitation :	No
Audience :	International
Event name :	IUGG XXIV
Event date :	2-13 July 2007
Event organizer :	http://www.iugg2007perugia.it/
Event place (city) :	Perugia
Event country :	Italy
Abstract :	[en] Recent findings have led to growing concern regarding the impact of ocean acidification on marine calcifyers, but little is known about their biogeochemistry in natural (field) conditions (a major but overlooked pre-requisite for realistic modelling of the future evolution of marine C cycling in a high CO2 world). The changes that will undergo these species in the near future and the biological feedback to decreasing oceanic pH are still open to debate. Coccolithophores, among which Emiliania huxleyi (Ehux) is the most abundant and widespread species, are the dominant calcifying phytoplankton in the subpolar and temperate zones of the worlds oceans. Within the framework of the Climate and Atmosphere Belgian Federal Science Policy Office programme, the continental margin of the Northern Bay of Biscay (North Atlantic Ocean) was visited in June 2006 during a transdisciplinary investigation of a late-spring bloom dominated by Ehux. Remote sensing images, transmitted onboard on a daily basis, were of valuable significance to pinpoint the coccolithophorid bloom along the margin, and to sample stations with contrasted biogeochemical properties.We determined 14C-based primary production and calcification rates, as well as pelagic respiration rates (O2 incubations). The magnitude of the biological and carbonate carbon fluxes will be synthesized and discussed in the light of biogeochemical parameters, such as Transparent Exopolymer Particles (TEP), chlorophyll-a, particulate carbon concentrations, particle dynamics and particulate organic carbon export (deduced from 234Th fluxes). Additional information on the bloom biogeochemistry will be presented (activity of dissolved esterase enzymes and bacterial community structure) to emphasize the importance of coccolithophorid blooms in the contemporary carbon cycle.
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/80974

File(s) associated to this reference

Fulltext file(s):

	File	Commentary	Version	Size	Access
Restricted access	Poster_Harlay_IUGG2007_Perugia.pdf		Author preprint	97.78 kB	Request copy

All documents in ORBi are protected by a user license.

Dspace v1.5