Oligotrophication and Metabolic Slowing-Down of a NW Mediterranean Coastal Ecosystem

Handle URI:
http://hdl.handle.net/10754/626446
Title:
Oligotrophication and Metabolic Slowing-Down of a NW Mediterranean Coastal Ecosystem
Authors:
Agusti, Susana ( 0000-0003-0536-7293 ) ; Martinez Ayala, Juan; Regaudie-de-Gioux, Aurore; Duarte, Carlos M. ( 0000-0002-1213-1361 )
Abstract:
Increased oligotrophication is expected for oligotrophic areas as a consequence of ocean warming, which reduces diffusive vertical nutrient supply due to strengthened stratification. Evidence of ocean oligotrophication has been, thus far, reported for the open ocean. Here we reported oligotrophication and associated changes in plankton community metabolism with warming in a pristine, oligotrophic Mediterranean coastal area (Cap Salines, Mallorca Island, Spain) during a 10 years time series. As a temperate area, there were seasonal patterns associated to changes in the broad temperature range (12.0–28.4°C), with a primary phytoplankton bloom in late winter and a secondary one in the fall. Community respiration (R) rates peaked during summers and showed higher rates relative to gross primary production (GPP) with a prevalence of heterotrophic metabolism (2/3's of net community production (NCP) estimates). Chlorophyll a concentration significantly decreased with increasing water temperature in the coastal site at a rate of 0.014 ± 0.003 μg Chla L−1 °C−1 (P < 0.0001). The study revealed a significant decrease with time in Chlorophyll a concentration and nutrients concentration, indicating oligotrophication during the last decade. Community productivity consistently decreased with time as both GPP and R showed a significant decline. Warming of the Mediterranean Sea is expected to increase plankton metabolic rates, but the results indicated that the associated oligotrophication must lead to a slowing down of the community metabolism.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Agusti S, Martinez-Ayala J, Regaudie-de-Gioux A, Duarte CM (2017) Oligotrophication and Metabolic Slowing-Down of a NW Mediterranean Coastal Ecosystem. Frontiers in Marine Science 4. Available: http://dx.doi.org/10.3389/fmars.2017.00432.
Publisher:
Frontiers Media SA
Journal:
Frontiers in Marine Science
Issue Date:
22-Dec-2017
DOI:
10.3389/fmars.2017.00432
Type:
Article
ISSN:
2296-7745
Sponsors:
This research is a contribution to the projects MEDEICG (ref. CTM2009-07013) and ESTRESX (ref. CTM2012-32603) funded by the Spanish Ministry of Economy and Competitiveness, and also supported by the King Abdullah University of Science and Technology by S. Agusti's baseline funds. We thank J.C. Alonso, P. Carrillo de Albornoz, and N. Carrillo for help with sampling and analysis at the laboratory.
Additional Links:
https://www.frontiersin.org/articles/10.3389/fmars.2017.00432/full
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorAgusti, Susanaen
dc.contributor.authorMartinez Ayala, Juanen
dc.contributor.authorRegaudie-de-Gioux, Auroreen
dc.contributor.authorDuarte, Carlos M.en
dc.date.accessioned2017-12-27T13:11:16Z-
dc.date.available2017-12-27T13:11:16Z-
dc.date.issued2017-12-22en
dc.identifier.citationAgusti S, Martinez-Ayala J, Regaudie-de-Gioux A, Duarte CM (2017) Oligotrophication and Metabolic Slowing-Down of a NW Mediterranean Coastal Ecosystem. Frontiers in Marine Science 4. Available: http://dx.doi.org/10.3389/fmars.2017.00432.en
dc.identifier.issn2296-7745en
dc.identifier.doi10.3389/fmars.2017.00432en
dc.identifier.urihttp://hdl.handle.net/10754/626446-
dc.description.abstractIncreased oligotrophication is expected for oligotrophic areas as a consequence of ocean warming, which reduces diffusive vertical nutrient supply due to strengthened stratification. Evidence of ocean oligotrophication has been, thus far, reported for the open ocean. Here we reported oligotrophication and associated changes in plankton community metabolism with warming in a pristine, oligotrophic Mediterranean coastal area (Cap Salines, Mallorca Island, Spain) during a 10 years time series. As a temperate area, there were seasonal patterns associated to changes in the broad temperature range (12.0–28.4°C), with a primary phytoplankton bloom in late winter and a secondary one in the fall. Community respiration (R) rates peaked during summers and showed higher rates relative to gross primary production (GPP) with a prevalence of heterotrophic metabolism (2/3's of net community production (NCP) estimates). Chlorophyll a concentration significantly decreased with increasing water temperature in the coastal site at a rate of 0.014 ± 0.003 μg Chla L−1 °C−1 (P < 0.0001). The study revealed a significant decrease with time in Chlorophyll a concentration and nutrients concentration, indicating oligotrophication during the last decade. Community productivity consistently decreased with time as both GPP and R showed a significant decline. Warming of the Mediterranean Sea is expected to increase plankton metabolic rates, but the results indicated that the associated oligotrophication must lead to a slowing down of the community metabolism.en
dc.description.sponsorshipThis research is a contribution to the projects MEDEICG (ref. CTM2009-07013) and ESTRESX (ref. CTM2012-32603) funded by the Spanish Ministry of Economy and Competitiveness, and also supported by the King Abdullah University of Science and Technology by S. Agusti's baseline funds. We thank J.C. Alonso, P. Carrillo de Albornoz, and N. Carrillo for help with sampling and analysis at the laboratory.en
dc.publisherFrontiers Media SAen
dc.relation.urlhttps://www.frontiersin.org/articles/10.3389/fmars.2017.00432/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) or licensor 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.titleOligotrophication and Metabolic Slowing-Down of a NW Mediterranean Coastal Ecosystemen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalFrontiers in Marine Scienceen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionInstituto Mediterráneo de Estudios Avanzados (IMEDEA), CSIC-UIB, Mallorca, Spainen
kaust.authorAgusti, Susanaen
kaust.authorMartinez Ayala, Juanen
kaust.authorDuarte, Carlos M.en
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