Imbalanced nutrient recycling in a warmer ocean driven by differential response of extracellular enzymatic activities

Handle URI:
http://hdl.handle.net/10754/624909
Title:
Imbalanced nutrient recycling in a warmer ocean driven by differential response of extracellular enzymatic activities
Authors:
Ayo, Begoña; Abad, Naiara; Artolozaga, Itxaso; Azua, Iñigo; Baña, Zuriñe; Unanue, Marian; Gasol, Josep M.; Duarte, Carlos M. ( 0000-0002-1213-1361 ) ; Iriberri, Juan
Abstract:
Ocean oligotrophication concurrent with warming weakens the capacity of marine primary producers to support marine food webs and act as a CO2 sink, and is believed to result from reduced nutrient inputs associated to the stabilization of the thermocline. However, nutrient supply in the oligotrophic ocean is largely dependent on the recycling of organic matter. This involves hydrolytic processes catalyzed by extracellular enzymes released by bacteria, which temperature-dependence has not yet been evaluated. Here we report a global assessment of the temperature-sensitivity, as represented by the activation energies (Ea ), of extracellular β-glucosidase (βG), leucine aminopeptidase (LAP) and alkaline phosphatase (AP) enzymatic activities, which enable the uptake by bacteria of substrates rich in carbon, nitrogen and phosphorus, respectively. These Ea were calculated from two different approaches, temperature experimental manipulations and a space-for-time substitution approach, which generated congruent results. The three activities showed contrasting Ea in the subtropical and tropical ocean, with βG increasing the fastest with warming, followed by LAP, while AP showed the smallest increase. The estimated activation energies predict that the hydrolysis products under projected warming scenarios will have higher C:N, C:P and N:P molar ratios than those currently generated, and suggest that the warming of oceanic surface waters leads to a decline in the nutrient supply to the microbial heterotrophic community relative to that of carbon, particularly so for phosphorus, slowing down nutrient recycling and contributing to further ocean oligotrophication. This article is protected by copyright. All rights reserved.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Ayo B, Abad N, Artolozaga I, Azua I, Baña Z, et al. (2017) Imbalanced nutrient recycling in a warmer ocean driven by differential response of extracellular enzymatic activities. Global Change Biology. Available: http://dx.doi.org/10.1111/gcb.13779.
Publisher:
Wiley-Blackwell
Journal:
Global Change Biology
Issue Date:
8-Jun-2017
DOI:
10.1111/gcb.13779
Type:
Article
ISSN:
1354-1013
Sponsors:
This is a contribution to the MALASPINA Expedition 2010 project, funded by the CONSOLIDER-Ingenio 2010 program from the Spanish Ministry of Economy and Competitiveness (Ref. CSD2008-00077). NA was supported by a grant from the Basque Government (Ref. BFI-2010-130). We thank one anonymous reviewer for helpful comments on an earlier version of this manuscript. We thank the participants in the Malaspina Expedition and the crew of BIO Hespérides and the personnel of the Marine Technology Unit of CSIC (UTM) for their invaluable support.
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1111/gcb.13779/abstract
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorAyo, Begoñaen
dc.contributor.authorAbad, Naiaraen
dc.contributor.authorArtolozaga, Itxasoen
dc.contributor.authorAzua, Iñigoen
dc.contributor.authorBaña, Zuriñeen
dc.contributor.authorUnanue, Marianen
dc.contributor.authorGasol, Josep M.en
dc.contributor.authorDuarte, Carlos M.en
dc.contributor.authorIriberri, Juanen
dc.date.accessioned2017-06-12T08:33:42Z-
dc.date.available2017-06-12T08:33:42Z-
dc.date.issued2017-06-08en
dc.identifier.citationAyo B, Abad N, Artolozaga I, Azua I, Baña Z, et al. (2017) Imbalanced nutrient recycling in a warmer ocean driven by differential response of extracellular enzymatic activities. Global Change Biology. Available: http://dx.doi.org/10.1111/gcb.13779.en
dc.identifier.issn1354-1013en
dc.identifier.doi10.1111/gcb.13779en
dc.identifier.urihttp://hdl.handle.net/10754/624909-
dc.description.abstractOcean oligotrophication concurrent with warming weakens the capacity of marine primary producers to support marine food webs and act as a CO2 sink, and is believed to result from reduced nutrient inputs associated to the stabilization of the thermocline. However, nutrient supply in the oligotrophic ocean is largely dependent on the recycling of organic matter. This involves hydrolytic processes catalyzed by extracellular enzymes released by bacteria, which temperature-dependence has not yet been evaluated. Here we report a global assessment of the temperature-sensitivity, as represented by the activation energies (Ea ), of extracellular β-glucosidase (βG), leucine aminopeptidase (LAP) and alkaline phosphatase (AP) enzymatic activities, which enable the uptake by bacteria of substrates rich in carbon, nitrogen and phosphorus, respectively. These Ea were calculated from two different approaches, temperature experimental manipulations and a space-for-time substitution approach, which generated congruent results. The three activities showed contrasting Ea in the subtropical and tropical ocean, with βG increasing the fastest with warming, followed by LAP, while AP showed the smallest increase. The estimated activation energies predict that the hydrolysis products under projected warming scenarios will have higher C:N, C:P and N:P molar ratios than those currently generated, and suggest that the warming of oceanic surface waters leads to a decline in the nutrient supply to the microbial heterotrophic community relative to that of carbon, particularly so for phosphorus, slowing down nutrient recycling and contributing to further ocean oligotrophication. This article is protected by copyright. All rights reserved.en
dc.description.sponsorshipThis is a contribution to the MALASPINA Expedition 2010 project, funded by the CONSOLIDER-Ingenio 2010 program from the Spanish Ministry of Economy and Competitiveness (Ref. CSD2008-00077). NA was supported by a grant from the Basque Government (Ref. BFI-2010-130). We thank one anonymous reviewer for helpful comments on an earlier version of this manuscript. We thank the participants in the Malaspina Expedition and the crew of BIO Hespérides and the personnel of the Marine Technology Unit of CSIC (UTM) for their invaluable support.en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1111/gcb.13779/abstracten
dc.rightsThis is the peer reviewed version of the following article: Imbalanced nutrient recycling in a warmer ocean driven by differential response of extracellular enzymatic activities, which has been published in final form at http://doi.org/10.1111/gcb.13779. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.en
dc.subjectAlkaline phosphataseen
dc.subjectGlobal warmingen
dc.subjectCen
dc.subjectNen
dc.subjectβ-glucosidaseen
dc.subjectleucine aminopeptidaseen
dc.subjectTemperature-sensitivityen
dc.subjectP Molar Ratioen
dc.subjectSubtropical And Tropical Oceanen
dc.subjectExtracellular Enzymatic Activityen
dc.titleImbalanced nutrient recycling in a warmer ocean driven by differential response of extracellular enzymatic activitiesen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalGlobal Change Biologyen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Immunology; Microbiology and Parasitology, Faculty of Science and Technology, University of the Basque Country UPV/EHU; Leioa-Bizkaia Spainen
dc.contributor.institutionResearch Centre for Experimental Marine Biology and Biotechnology PiE-UPV/EHU; Plentzia-Bizkaia Spainen
dc.contributor.institutionInstitut de Ciències del Mar, CSIC; Barcelona Catalunya Spainen
dc.contributor.institutionDepartment of Global Change Research; Instituto Mediterráneo de Estudios Avanzados (CSIC-UIB); Esporles Illes Balears Spainen
kaust.authorDuarte, Carlos M.en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.