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The effect of a transient frontal zone on the spatial distribution of extant coccolithophores around the Madeira archipelago (Northeast Atlantic)

2019Journal article Open access
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dc.contributor.authorNarciso, Áurea
dc.contributor.authorCaldeira, Rui
dc.contributor.authorReis, Jesus
dc.contributor.authorHoppenrath, Mona
dc.contributor.authorCachão, Mário
dc.contributor.authorKaufmann, Manfred
dc.date.accessioned2021-10-01T08:57:38Z
dc.date.available2021-10-01T08:57:38Z
dc.date.issued2019
dc.description.abstractIn order to characterize the coccolithophore community around the Madeira archipelago and to understand the effect of a transient frontal zone on its distribution, 149 seawater samples from the first 150 m were collected in 37 stations, during the research cruise POS466 of RV Poseidon. The present study revealed the occurrence of two biogeographic domains, NE and SW, during the late winter of 2014, with distinct physical-chemical and cal careous nannoplankton characteristics. The NE sector was characterized by higher coccolithophore cell densities (mean of 56 × 103 cell L−1) and a slightly lower diversity (Margalef diversity index of 1.80) when compared with the SW sector (mean of 47 × 103 cell L−1; Md index of 1.86). The more productive sector, NE, was asso ciated with colder, less saline and higher nutrient content water masses, linked to the injection of a westerly flow with origin in the Azores frontal system. Total cell densities ranged between 12 × 103 and 112 × 103 cell L−1, being Emiliana huxleyi the dominant species followed by small Gephyrocapsa. The most common and subordinate taxa, in order of decreasing abundance, were: Gephyrocapsa oceanica, Michaelsarsia spp., Syracosphaera spp., Umbilicosphaera spp. and Algirosphaera robusta. Relationships between environmental conditions and spatial and vertical variability in coccosphere abundance, associated E. huxleyi and small Gephyrocapsa with the more productive water mass conditions, linked to the thermohaline transient front. G. oceanica distribution indicated its preference for warmer and less turbulent coastal waters, when compared to E. huxleyi and small Gephyrocapsa. Michaelsarsia spp. and A. robusta revealed preference for the northwest coast of Madeira, associated with mesotrophic con ditions of the water column. Syracosphaera spp. and Umbilicosphaera spp. were well distributed throughout the archipelago and along the sampled depths, from the coast to open ocean conditions, as well as from lower to higher productive zones, displaying affinities for the meso to oligotrophic conditions, typical of these subtropical waters. The broad depth range of several taxa and the nonexistence of the coccolithophore vertical succession were the result of homogeneous and generalized well-mixed surface layer during the present survey.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationNarciso, Á., Caldeira, R., Reis, J., Hoppenrath, M., Cachão, M., & Kaufmann, M. (2019). The effect of a transient frontal zone on the spatial distribution of extant coccolithophores around the Madeira archipelago (Northeast Atlantic). Estuarine, Coastal and Shelf Science, 223, 25-38. https://doi.org/10.1016/j.ecss.2019.04.014pt_PT
dc.identifier.doi10.1016/j.ecss.2019.04.014pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3685
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectPhytoplanktonpt_PT
dc.subjectBiodiversitypt_PT
dc.subjectEcologypt_PT
dc.subjectIslandspt_PT
dc.subjectSubtropical northeast Atlanticpt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências da Vidapt_PT
dc.titleThe effect of a transient frontal zone on the spatial distribution of extant coccolithophores around the Madeira archipelago (Northeast Atlantic)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04423%2F2013/PT
oaire.citation.endPage38pt_PT
oaire.citation.startPage25pt_PT
oaire.citation.titleEstuarine, Coastal and Shelf Sciencept_PT
oaire.citation.volume223pt_PT
oaire.fundingStream5876
person.familyNameMartins Narciso
person.familyNameKaufmann
person.givenNameÁurea
person.givenNameManfred
person.identifierAAU-8890-2021
person.identifier.ciencia-id9C10-F9E3-96C6
person.identifier.ciencia-idA316-A34A-F7AF
person.identifier.orcid0000-0002-4319-0241
person.identifier.orcid0000-0001-6213-3229
person.identifier.ridA-7561-2013
person.identifier.scopus-author-id52564241900
person.identifier.scopus-author-id35264346100
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication041c8f9b-d342-4678-938d-9c95a4fd19de
relation.isAuthorOfPublication.latestForDiscoveryc1c53c0c-02ac-4f17-815c-01e1c3fe68fc
relation.isProjectOfPublication45a15024-7dd2-4503-9794-2816560962a4
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