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Posidonia oceanica photosynthesis along a depth gradient

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dc.contributor.authorCosta, Monya
dc.contributor.authorSilva, João
dc.contributor.authorOlivé, Irene
dc.contributor.authorBarrote, Isabel
dc.contributor.authorSantos, Rui
dc.date.accessioned2014-01-06T11:10:07Z
dc.date.available2014-01-06T11:10:07Z
dc.date.issued2012
dc.description.abstractSeagrass photosynthetic rates depend largely on light availability, along with other environmental factors and the physiological condition of the plants. Along a vertical gradient, seagrasses are permanently exposed to distinct light environments, to which the photosynthetic apparatus must adapt. In this study, the response of Posidonia oceanica photosynthesis to light was investigated in plants collected at three different depths (3, 20 and 30m) in the Bay of Revellata, Corsica, France, in the the marine research station Stareso (42º34’4’’N, 8º43’2’’E) in October, 2011. Photosynthesis-irradiance curves (P-I) were measured in an oxygen electrode system (DW3/CB1, Hansatech). Photosynthetic rates were determined over an increasing range of irradiance values, from darkness to 850 µmol quanta m-2 s-1. The Jassby and Platt hyperbolic model (1957) equation was fitted to the obtained data, to calculate the relevant photosynthetic parameters. For each depth, maximum photosynthetic rate (Pmax), inicial slope (), light saturation point (Ik), light compensation point (Ic) and dark respiration (Rd) were determined. Photosynthetic parameters showed significant variations with depth, particularly between the shallowest plants (3m) and the two other depths. As expected, P. oceanica from 3m depth revealed a “sun-adapted” photosynthetic behavior in contrast with plants from deeper waters.por
dc.identifier.citationCosta MM, Silva J, Olivé I, Barrote I, Santos R (2012). Posidonia oceanica photosynthesis along a depth gradient, 3rd Mediterranean seagrass workshop (May 2012), Essaouira, Morocco, p.26por
dc.identifier.otherAUT: IBA00639; MROS00812;
dc.identifier.urihttp://hdl.handle.net/10400.1/3276
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherMediterranean Seagrass Associationpor
dc.subjectSeagrasspor
dc.subjectPosidonia oceanicapor
dc.subjectPhotosynthesispor
dc.subjectDepth gradientpor
dc.subjectLightpor
dc.titlePosidonia oceanica photosynthesis along a depth gradientpor
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceEssaouira, Moroccopor
oaire.citation.endPage26por
oaire.citation.startPage26por
oaire.citation.title3rd Mediterranean Seagrass Workshoppor
person.familyNameSilva
person.familyNameOlivé
person.familyNameBarrote
person.familyNameSantos
person.givenNameJoão
person.givenNameIrene
person.givenNameIsabel
person.givenNameRui
person.identifier82814
person.identifier42560
person.identifier.ciencia-id8216-527E-1BD4
person.identifier.ciencia-id801C-0AE4-B5CA
person.identifier.ciencia-id9B18-444D-2244
person.identifier.orcid0000-0002-7211-1661
person.identifier.orcid0000-0002-4865-923X
person.identifier.orcid0000-0002-0922-0259
person.identifier.orcid0000-0002-7861-4366
person.identifier.ridJ-7874-2013
person.identifier.ridJ-3922-2013
person.identifier.ridB-4168-2008
person.identifier.scopus-author-id7403023547
person.identifier.scopus-author-id16242114500
person.identifier.scopus-author-id8659654200
person.identifier.scopus-author-id7201375018
rcaap.rightsrestrictedAccesspor
rcaap.typeconferenceObjectpor
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relation.isAuthorOfPublication84487ca8-404a-4584-81f0-3662c340d712
relation.isAuthorOfPublication.latestForDiscovery61040b53-b17a-40f6-b42e-f5476a7a6ddb

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