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Nitrogen load and irradiance affect morphology, photosynthesis and growth of Caulerpa prolifera (Bryopsidales : Chlorophyta)

2005Journal article Open access
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dc.contributor.authorMalta, Erik-jan
dc.contributor.authorFerreira, D. G.
dc.contributor.authorVergara, J. J.
dc.contributor.authorPerez-Llorens, J. L.
dc.date.accessioned2018-12-07T14:58:38Z
dc.date.available2018-12-07T14:58:38Z
dc.date.issued2005
dc.description.abstractThe effect of nitrogen (N) load and irradiance on morphology, growth and photosynthetic performance was studied in the green macroalga Caulerpa prolifera (Forsskal) J. V. Lamouroux from the Gulf of Cddiz (south Spain). Constant growth rates were obtained for thalli growing at different N loads, which could be fitted to tissue N using the Droop equation, rendering a maximum growth rate of 0.09 d(-1), a minimum tissue N level of 1.71 % dry weight (DW) and a critical tissue N of 5.2 % DW. N limitation had no effects on F-v/F-m (maximum quantum yield of chlorophyll a fluorescence). Stolon production was significantly highest at low N loads; a reverse trend was observed for assimilator production. In a second experiment, algae were subjected to combinations of high and low N loads (HN and LN) and irradiance (HL and LL) levels. Highest growth rates were observed in the HNLL treatment, whereas the reverse combination rendered the lowest growth rate. High irradiance and high N load both led to increased biomass allocation to assimilators; at low N, the bulk of the biomass (> 75 % in the HLLN treatment) was allocated to the stolons. HN had a positive effect on F-v/F-m and HL had a negative effect. HL algae had a higher capacity for non-photochemical quenching. Despite its prolific nature, C. prolifera should be characterised as a slow-growing, but highly nitrophilic alga which has the capacity to forage for nutrients by allocating biomass to the stolons.
dc.description.sponsorshipREN2002-0746/MAR, MERG-CT-2004-006385; EVK3-CT-2000-50003
dc.identifier.doi10.3354/meps298101
dc.identifier.issn0171-8630
dc.identifier.urihttp://hdl.handle.net/10400.1/12129
dc.language.isoeng
dc.peerreviewedyes
dc.publisherInter-Research
dc.subjectSeagrass Cymodocea-Nodosa
dc.subjectTaxifolia Chlorophyta
dc.subjectNutrient Limitation
dc.subjectSediment Ammonium
dc.subjectGenus Caulerpa
dc.subjectGreen-Algae
dc.subjectMacroalgae
dc.subjectPhytoplankton
dc.subjectRequirements
dc.subjectFluorescence
dc.titleNitrogen load and irradiance affect morphology, photosynthesis and growth of Caulerpa prolifera (Bryopsidales : Chlorophyta)
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage114
oaire.citation.startPage101
oaire.citation.titleMarine Ecology Progress Series
oaire.citation.volume298
person.familyNameMalta
person.givenNameErik-jan
person.identifier.orcid0000-0002-3934-3807
person.identifier.ridF-2485-2014
person.identifier.scopus-author-id7003607705
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication92920db9-fc6b-48cc-962e-4e5ee8441cd7
relation.isAuthorOfPublication.latestForDiscovery92920db9-fc6b-48cc-962e-4e5ee8441cd7

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