Impacts of warming on phytoplankton abundance and phenology in a typical tropical marine ecosystem

Handle URI:
http://hdl.handle.net/10754/627062
Title:
Impacts of warming on phytoplankton abundance and phenology in a typical tropical marine ecosystem
Authors:
Gittings, John ( 0000-0003-4183-3482 ) ; Raitsos, Dionysios E.; Krokos, George; Hoteit, Ibrahim ( 0000-0002-3751-4393 )
Abstract:
In the tropics, thermal stratification (during warm conditions) may contribute to a shallowing of the mixed layer above the nutricline and a reduction in the transfer of nutrients to the surface lit-layer, ultimately limiting phytoplankton growth. Using remotely sensed observations and modelled datasets, we study such linkages in the northern Red Sea (NRS) - a typical tropical marine ecosystem. We assess the interannual variability (1998-2015) of both phytoplankton biomass and phenological indices (timing of bloom initiation, duration and termination) in relation to regional warming. We demonstrate that warmer conditions in the NRS are associated with substantially weaker winter phytoplankton blooms, which initiate later, terminate earlier and are shorter in their overall duration (~ 4 weeks). These alterations are directly linked with the strength of atmospheric forcing (air-sea heat fluxes) and vertical stratification (mixed layer depth [MLD]). The interannual variability of sea surface temperature (SST) is found to be a good indicator of phytoplankton abundance, but appears to be less important for predicting bloom timing. These findings suggest that future climate warming scenarios may have a two-fold impact on phytoplankton growth in tropical marine ecosystems: 1) a reduction in phytoplankton abundance and 2) alterations in the timing of seasonal phytoplankton blooms.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program
Citation:
Gittings JA, Raitsos DE, Krokos G, Hoteit I (2018) Impacts of warming on phytoplankton abundance and phenology in a typical tropical marine ecosystem. Scientific Reports 8. Available: http://dx.doi.org/10.1038/s41598-018-20560-5.
Publisher:
Springer Nature
Journal:
Scientific Reports
KAUST Grant Number:
3268
Issue Date:
29-Jan-2018
DOI:
10.1038/s41598-018-20560-5
Type:
Article
ISSN:
2045-2322
Sponsors:
The authors are grateful to the ESA Ocean Colour CCI team for providing and processing the Chl-a dataset. We also acknowledge the NOAA National Oceanographic Data Centre (NODC), the University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) and the NASA Physical Oceanography Distributed Active Archive Centre (PODAAC) for making the GHRSST AVHRR_OI dataset available. The authors also thank Dr Hari Dasari for providing modelled outputs of heat fluxes, and Dr Marie-Fanny Racault for her valuable input regarding the implementation of the phenology threshold criterion algorithm. This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. 3268.
Additional Links:
https://www.nature.com/articles/s41598-018-20560-5
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorGittings, Johnen
dc.contributor.authorRaitsos, Dionysios E.en
dc.contributor.authorKrokos, Georgeen
dc.contributor.authorHoteit, Ibrahimen
dc.date.accessioned2018-02-07T07:02:28Z-
dc.date.available2018-02-07T07:02:28Z-
dc.date.issued2018-01-29en
dc.identifier.citationGittings JA, Raitsos DE, Krokos G, Hoteit I (2018) Impacts of warming on phytoplankton abundance and phenology in a typical tropical marine ecosystem. Scientific Reports 8. Available: http://dx.doi.org/10.1038/s41598-018-20560-5.en
dc.identifier.issn2045-2322en
dc.identifier.doi10.1038/s41598-018-20560-5en
dc.identifier.urihttp://hdl.handle.net/10754/627062-
dc.description.abstractIn the tropics, thermal stratification (during warm conditions) may contribute to a shallowing of the mixed layer above the nutricline and a reduction in the transfer of nutrients to the surface lit-layer, ultimately limiting phytoplankton growth. Using remotely sensed observations and modelled datasets, we study such linkages in the northern Red Sea (NRS) - a typical tropical marine ecosystem. We assess the interannual variability (1998-2015) of both phytoplankton biomass and phenological indices (timing of bloom initiation, duration and termination) in relation to regional warming. We demonstrate that warmer conditions in the NRS are associated with substantially weaker winter phytoplankton blooms, which initiate later, terminate earlier and are shorter in their overall duration (~ 4 weeks). These alterations are directly linked with the strength of atmospheric forcing (air-sea heat fluxes) and vertical stratification (mixed layer depth [MLD]). The interannual variability of sea surface temperature (SST) is found to be a good indicator of phytoplankton abundance, but appears to be less important for predicting bloom timing. These findings suggest that future climate warming scenarios may have a two-fold impact on phytoplankton growth in tropical marine ecosystems: 1) a reduction in phytoplankton abundance and 2) alterations in the timing of seasonal phytoplankton blooms.en
dc.description.sponsorshipThe authors are grateful to the ESA Ocean Colour CCI team for providing and processing the Chl-a dataset. We also acknowledge the NOAA National Oceanographic Data Centre (NODC), the University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) and the NASA Physical Oceanography Distributed Active Archive Centre (PODAAC) for making the GHRSST AVHRR_OI dataset available. The authors also thank Dr Hari Dasari for providing modelled outputs of heat fluxes, and Dr Marie-Fanny Racault for her valuable input regarding the implementation of the phenology threshold criterion algorithm. This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. 3268.en
dc.publisherSpringer Natureen
dc.relation.urlhttps://www.nature.com/articles/s41598-018-20560-5en
dc.rightsThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleImpacts of warming on phytoplankton abundance and phenology in a typical tropical marine ecosystemen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEarth Science and Engineering Programen
dc.identifier.journalScientific Reportsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionRemote Sensing Group, Plymouth Marine Laboratory, Prospect Place, The Hoe, PL1 3DH, United Kingdom.en
kaust.authorGittings, Johnen
kaust.authorKrokos, Georgeen
kaust.authorHoteit, Ibrahimen
kaust.grant.number3268en
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