Iron Deficiency in Seagrasses and Macroalgae in the Red Sea Is Unrelated to Latitude and Physiological Performance

Handle URI:
http://hdl.handle.net/10754/627332
Title:
Iron Deficiency in Seagrasses and Macroalgae in the Red Sea Is Unrelated to Latitude and Physiological Performance
Authors:
Anton, Andrea; Hendriks, Iris E.; Marbà, Núria; Krause-Jensen, Dorte; Garcias Bonet, Neus ( 0000-0001-6469-7167 ) ; Duarte, Carlos M. ( 0000-0002-1213-1361 )
Abstract:
Iron can limit primary production in shallow marine systems, especially in tropical waters characterized by carbonated sediments, where iron is largely trapped in a non-available form. The Red Sea, an oligotrophic ecosystem characterized by a strong N-S latitudinal nutrient gradient, is a suitable setting to explore patterns in situ of iron limitation in macrophytes and their physiological performance under different iron regimes. We assessed the interactions between environmental gradients and physiological parameters of poorly-studied Red Sea macrophytes. Iron concentration, chlorophyll a concentration, blade thickness, and productivity of 17 species of macrophytes, including seven species of seagrasses and 10 species of macroalgae, were measured at 21 locations, spanning 10 latitude degrees, along the Saudi Arabian coast. Almost 90% of macrophyte species had iron concentrations below the levels indicative of iron sufficiency and more than 40% had critically low iron concentrations, suggesting that iron is a limiting factor of primary production throughout the Red Sea. We did not identify relationships between tissue iron concentration, chlorophyll a concentration and physiological performance of the 17 species of seagrass and macroalgae. There was also no latitudinal pattern in any of the parameters studied, indicating that the South to North oligotrophication of the Red Sea is not reflected in iron concentration, chlorophyll a concentration or productivity of Red Sea macrophytes.
KAUST Department:
Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division; Marine Science Program
Citation:
Anton A, Hendriks IE, Marbà N, Krause-Jensen D, Garcias-Bonet N, et al. (2018) Iron Deficiency in Seagrasses and Macroalgae in the Red Sea Is Unrelated to Latitude and Physiological Performance. Frontiers in Marine Science 5. Available: http://dx.doi.org/10.3389/fmars.2018.00074.
Publisher:
Frontiers Media SA
Journal:
Frontiers in Marine Science
Issue Date:
6-Mar-2018
DOI:
10.3389/fmars.2018.00074
Type:
Article
ISSN:
2296-7745
Sponsors:
This research was supported by the King Abdullah University of Science and Technology through baseline funding and funds by the Tarek Ahmed Juffali Research Chair in Red Sea Ecology to CD. We thank Vijayalaxmi Dasari, Isidora Mendia Saez de Zuazola, Sabrina Roth, Yi Zhang, Janna Randle, and Mongi Ennasri for support in the laboratory analyses, Brian Hession, CMOR and the RV Thuwal crew for logistical support, Nathan Geraldi for helpful comments on early drafts of the manuscript, John Runcie for support with the Shutter Fluorometer and two reviewers for constructive comments.
Additional Links:
https://www.frontiersin.org/articles/10.3389/fmars.2018.00074/full
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Marine Science Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAnton, Andreaen
dc.contributor.authorHendriks, Iris E.en
dc.contributor.authorMarbà, Núriaen
dc.contributor.authorKrause-Jensen, Dorteen
dc.contributor.authorGarcias Bonet, Neusen
dc.contributor.authorDuarte, Carlos M.en
dc.date.accessioned2018-03-15T11:35:53Z-
dc.date.available2018-03-15T11:35:53Z-
dc.date.issued2018-03-06en
dc.identifier.citationAnton A, Hendriks IE, Marbà N, Krause-Jensen D, Garcias-Bonet N, et al. (2018) Iron Deficiency in Seagrasses and Macroalgae in the Red Sea Is Unrelated to Latitude and Physiological Performance. Frontiers in Marine Science 5. Available: http://dx.doi.org/10.3389/fmars.2018.00074.en
dc.identifier.issn2296-7745en
dc.identifier.doi10.3389/fmars.2018.00074en
dc.identifier.urihttp://hdl.handle.net/10754/627332-
dc.description.abstractIron can limit primary production in shallow marine systems, especially in tropical waters characterized by carbonated sediments, where iron is largely trapped in a non-available form. The Red Sea, an oligotrophic ecosystem characterized by a strong N-S latitudinal nutrient gradient, is a suitable setting to explore patterns in situ of iron limitation in macrophytes and their physiological performance under different iron regimes. We assessed the interactions between environmental gradients and physiological parameters of poorly-studied Red Sea macrophytes. Iron concentration, chlorophyll a concentration, blade thickness, and productivity of 17 species of macrophytes, including seven species of seagrasses and 10 species of macroalgae, were measured at 21 locations, spanning 10 latitude degrees, along the Saudi Arabian coast. Almost 90% of macrophyte species had iron concentrations below the levels indicative of iron sufficiency and more than 40% had critically low iron concentrations, suggesting that iron is a limiting factor of primary production throughout the Red Sea. We did not identify relationships between tissue iron concentration, chlorophyll a concentration and physiological performance of the 17 species of seagrass and macroalgae. There was also no latitudinal pattern in any of the parameters studied, indicating that the South to North oligotrophication of the Red Sea is not reflected in iron concentration, chlorophyll a concentration or productivity of Red Sea macrophytes.en
dc.description.sponsorshipThis research was supported by the King Abdullah University of Science and Technology through baseline funding and funds by the Tarek Ahmed Juffali Research Chair in Red Sea Ecology to CD. We thank Vijayalaxmi Dasari, Isidora Mendia Saez de Zuazola, Sabrina Roth, Yi Zhang, Janna Randle, and Mongi Ennasri for support in the laboratory analyses, Brian Hession, CMOR and the RV Thuwal crew for logistical support, Nathan Geraldi for helpful comments on early drafts of the manuscript, John Runcie for support with the Shutter Fluorometer and two reviewers for constructive comments.en
dc.publisherFrontiers Media SAen
dc.relation.urlhttps://www.frontiersin.org/articles/10.3389/fmars.2018.00074/fullen
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectCoral reefsen
dc.subjectFluorescenceen
dc.subjectLatitudinal gradienten
dc.subjectMacroalgaeen
dc.subjectOligotrophicen
dc.subjectPrimary productionen
dc.subjectSeagrassen
dc.subjectSeaweeden
dc.titleIron Deficiency in Seagrasses and Macroalgae in the Red Sea Is Unrelated to Latitude and Physiological Performanceen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentMarine Science Programen
dc.identifier.journalFrontiers in Marine Scienceen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionGlobal Change Research Group, Mediterranean Institute for Advanced Studies (IMEDEA, CSIC-UIB), Esporles, Spainen
dc.contributor.institutionDepartment of Bioscience, Aarhus University, Silkeborg, Denmarken
kaust.authorAnton, Andreaen
kaust.authorGarcias Bonet, Neusen
kaust.authorDuarte, Carlos M.en
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