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Evaluating underwater light availability for Phytoplankton: mean light intensity in the mixed layer versus attenuation Coefficient

2023-08-17Journal article Open access
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dc.contributor.authorDomingues, Rita B.
dc.contributor.authorBarbosa, Ana B.
dc.date.accessioned2023-09-13T13:20:11Z
dc.date.available2023-09-13T13:20:11Z
dc.date.issued2023-08-17
dc.date.updated2023-08-25T12:38:51Z
dc.description.abstractThe use of several light-related variables, such as the Secchi disc depth, the euphotic depth, and in particular, the diffuse attenuation coefficient (K<sub>d</sub>), is deeply rooted in phytoplankton research, but these are not the most appropriate indicators of the amount of light available for photosynthesis. We argue that the variable of interest for phytoplankton is the mean light intensity in the mixed layer (I<sub>m</sub>), which represents the mean light to which phytoplankton cells are exposed throughout their life cycle, while being continuously mixed in the mixed layer. We use empirical data collected in different coastal ecosystems in southern Portugal to demonstrate why I<sub>m</sub> should be the preferred metric instead of the deeply rooted K<sub>d</sub>. We show that, although the relationship between I<sub>m</sub> and K<sub>d</sub> is inversely proportional, it is not always strong or even significant. Different I<sub>m</sub> values can be associated with the same K<sub>d</sub>, but distinct I<sub>m</sub> have different physiological effects of phytoplankton. Therefore, K<sub>d</sub> does not capture the amount of light available for photosynthesis, given that, unlike I<sub>m</sub>, K<sub>d</sub> calculation does not consider the depth of the mixed layer. Therefore, we urge phytoplankton researchers to consider the measurement and calculation of I<sub>m</sub> when evaluating light-related processes in phytoplankton ecology.pt_PT
dc.description.sponsorshipLA/P/0069/2020pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifierdoi: 10.3390/w15162966
dc.identifier.citationWater 15 (16): 2966 (2023)pt_PT
dc.identifier.doi10.3390/w15162966pt_PT
dc.identifier.issn2073-4441
dc.identifier.urihttp://hdl.handle.net/10400.1/19979
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationCentre for Marine and Environmental Research (CIMA)
dc.relationNot Available
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectPhytoplankton; ; ;pt_PT
dc.subjectLight measurementspt_PT
dc.subjectLight limitationpt_PT
dc.subjectCoastal ecosystemspt_PT
dc.titleEvaluating underwater light availability for Phytoplankton: mean light intensity in the mixed layer versus attenuation Coefficientpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for Marine and Environmental Research (CIMA)
oaire.awardTitleNot Available
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00350%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/DL 57%2F2016/DL 57%2F2016%2FCP1361%2FCT0017/PT
oaire.citation.issue16pt_PT
oaire.citation.startPage2966pt_PT
oaire.citation.titleWaterpt_PT
oaire.citation.volume15pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamDL 57/2016
person.familyNameDomingues
person.familyNameBarbosa
person.givenNameRita
person.givenNameAna
person.identifier640932
person.identifier.ciencia-id7417-4EEC-3408
person.identifier.ciencia-idF514-2180-4CF8
person.identifier.orcid0000-0002-7107-8222
person.identifier.orcid0000-0002-7402-246X
person.identifier.scopus-author-id8627143500
person.identifier.scopus-author-id7103244778
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication43632aa6-ab1f-4c52-8737-dc069bc29291
relation.isAuthorOfPublication5b72648c-41b5-46c0-9a7f-7fa2f514b973
relation.isAuthorOfPublication.latestForDiscovery5b72648c-41b5-46c0-9a7f-7fa2f514b973
relation.isProjectOfPublication607b395b-b4ff-4b27-b6e4-779cdea78d97
relation.isProjectOfPublication61c10b94-c554-4ad6-9b5d-0e151fe0df42
relation.isProjectOfPublication.latestForDiscovery607b395b-b4ff-4b27-b6e4-779cdea78d97

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