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Photosynthetic responses of Halophila stipulacea to a light gradient. II. Acclimations following transplantation

2009Journal article Open Access
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dc.contributor.authorSharon, Yoni
dc.contributor.authorSilva, João
dc.contributor.authorSantos, Rui
dc.contributor.authorRuncie, John W.
dc.contributor.authorChernihovsky, Mark
dc.contributor.authorBeer, Sven
dc.date.accessioned2018-12-07T14:58:34Z
dc.date.available2018-12-07T14:58:34Z
dc.date.issued2009
dc.description.abstractHalophila stipulacea is the dominant seagrass in the Gulf of Aqaba (northern Red Sea), where it grows from the intertidal to depths exceeding 50 m. Its successful growth under such a broad irradiance gradient shows either a high plasticity or is caused by longer-term adaptations to the various depths, possibly resulting in the formation of ecotypes. In April 2008 we transplanted shoots of this seagrass between the extreme depths of its distribution at the study site (8 and 33 m) in order to evaluate its acclimation potential to various irradiances. We compared photosynthetic parameters derived from light response curves generated by PAM fluorometry (so-called rapid light curves, RLC) and measured chlorophyll a and b concentrations. RLCs from the shallow (similar to 400 pmol photons m(-2) s(-1) at midday) and deep (similar to 35 pmol photons m(-2) s(-1) at midday) sites were characteristic for high- and low-light growing plants, respectively, and the transplanted seagrasses acclimated to their new environments within 6 d, at which time their RLCs resembled those of the original plants growing at the depths to which they had been transplanted, Concentrations of both chlorophyll a and b decreased or increased when the plants were transferred to high- vs. low-light environments, respectively, but the chlorophyll a:b ratios remained constant. These fast changes in photosynthetic responses and light absorption characteristics in response to changing light environments points to Halophila stipulacea as being a highly plastic seagrass with regard to irradiance, which may partly explain its abundance across a wide range of irradiances along the depth gradient that it occupies.
dc.identifier.doi10.3354/ab00148
dc.identifier.issn1864-7790
dc.identifier.urihttp://hdl.handle.net/10400.1/12097
dc.language.isoeng
dc.peerreviewedyes
dc.publisherInter-Research
dc.subjectRed-sea
dc.subjectPam Fluorometry
dc.subjectSeagrasses
dc.subjectVariability
dc.subjectPopulations
dc.subjectPlasticity
dc.subjectRates
dc.titlePhotosynthetic responses of Halophila stipulacea to a light gradient. II. Acclimations following transplantation
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceEilat, Israel
oaire.citation.endPage157
oaire.citation.issue01-fev
oaire.citation.startPage153
oaire.citation.titleAquatic Biology
oaire.citation.title8Th International Workshop of the Group for Aquatic Primary Productivity/ Seminar on Gross and Net Primary Productivity
oaire.citation.volume7
person.familyNameSilva
person.familyNameSantos
person.givenNameJoão
person.givenNameRui
person.identifier82814
person.identifier42560
person.identifier.ciencia-id8216-527E-1BD4
person.identifier.ciencia-id9B18-444D-2244
person.identifier.orcid0000-0002-7211-1661
person.identifier.orcid0000-0002-7861-4366
person.identifier.ridJ-7874-2013
person.identifier.ridB-4168-2008
person.identifier.scopus-author-id7403023547
person.identifier.scopus-author-id7201375018
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication61040b53-b17a-40f6-b42e-f5476a7a6ddb
relation.isAuthorOfPublication84487ca8-404a-4584-81f0-3662c340d712
relation.isAuthorOfPublication.latestForDiscovery84487ca8-404a-4584-81f0-3662c340d712

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