Experimental assessment of cumulative temperature and UV-B radiation effects on Mediterranean plankton metabolism

Handle URI:
http://hdl.handle.net/10754/560369
Title:
Experimental assessment of cumulative temperature and UV-B radiation effects on Mediterranean plankton metabolism
Authors:
Garcia-Corral, Lara S.; Martinez Ayala, Juan; Duarte, Carlos M. ( 0000-0002-1213-1361 ) ; Agusti, Susana ( 0000-0003-0536-7293 )
Abstract:
The Mediterranean Sea is a vulnerable region for climate change, warming at higher rates compare to the global ocean. Warming leads to increased stratification of the water column and enhanced the oligotrophic nature of the Mediterranean Sea. The oligotrophic waters are already highly transparent, however, exposure of Mediterranean plankton to ultraviolet radiation (UV-B and UV-A) may increase further if the waters become more oligotrophic, thereby, allowing a deeper UV radiation penetration and likely enhancing impacts to biota. Here we experimentally elucidate the cumulative effects of warming and natural UV-B radiation on the net community production (NCP) of plankton communities. We conducted five experiments at monthly intervals, from June to October 2013, and evaluated the responses of NCP to ambient UV-B radiation and warming (+3°C), alone and in combination, in a coastal area of the northwest Mediterranean Sea. UV-B radiation and warming lead to reduced NCP and resulted in a heterotrophic (NCP < 0) metabolic balance. Both UV-B radiation and temperature, showed a significant individual effect in NCP across treatments and time. However, their joint effect showed to be synergistic as the interaction between them (UV × Temp) was statistically significant in most of the experiments performed. Our results showed that both drivers, would affect the gas exchange of CO2−O2 from and to the atmosphere and the role of plankton communities in the Mediterranean carbon cycle.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Red Sea Research Center (RSRC)
Citation:
Experimental assessment of cumulative temperature and UV-B radiation effects on Mediterranean plankton metabolism 2015, 2 Frontiers in Marine Science
Journal:
Frontiers in Marine Science
Issue Date:
7-Jul-2015
DOI:
10.3389/fmars.2015.00048
Type:
Article
ISSN:
2296-7745
Additional Links:
http://journal.frontiersin.org/article/10.3389/fmars.2015.00048
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorGarcia-Corral, Lara S.en
dc.contributor.authorMartinez Ayala, Juanen
dc.contributor.authorDuarte, Carlos M.en
dc.contributor.authorAgusti, Susanaen
dc.date.accessioned2015-07-14T12:01:59Zen
dc.date.available2015-07-14T12:01:59Zen
dc.date.issued2015-07-07en
dc.identifier.citationExperimental assessment of cumulative temperature and UV-B radiation effects on Mediterranean plankton metabolism 2015, 2 Frontiers in Marine Scienceen
dc.identifier.issn2296-7745en
dc.identifier.doi10.3389/fmars.2015.00048en
dc.identifier.urihttp://hdl.handle.net/10754/560369en
dc.description.abstractThe Mediterranean Sea is a vulnerable region for climate change, warming at higher rates compare to the global ocean. Warming leads to increased stratification of the water column and enhanced the oligotrophic nature of the Mediterranean Sea. The oligotrophic waters are already highly transparent, however, exposure of Mediterranean plankton to ultraviolet radiation (UV-B and UV-A) may increase further if the waters become more oligotrophic, thereby, allowing a deeper UV radiation penetration and likely enhancing impacts to biota. Here we experimentally elucidate the cumulative effects of warming and natural UV-B radiation on the net community production (NCP) of plankton communities. We conducted five experiments at monthly intervals, from June to October 2013, and evaluated the responses of NCP to ambient UV-B radiation and warming (+3°C), alone and in combination, in a coastal area of the northwest Mediterranean Sea. UV-B radiation and warming lead to reduced NCP and resulted in a heterotrophic (NCP < 0) metabolic balance. Both UV-B radiation and temperature, showed a significant individual effect in NCP across treatments and time. However, their joint effect showed to be synergistic as the interaction between them (UV × Temp) was statistically significant in most of the experiments performed. Our results showed that both drivers, would affect the gas exchange of CO2−O2 from and to the atmosphere and the role of plankton communities in the Mediterranean carbon cycle.en
dc.relation.urlhttp://journal.frontiersin.org/article/10.3389/fmars.2015.00048en
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.subjectUV-B radiationen
dc.subjecttemperatureen
dc.subjectcombined effectsen
dc.subjectplanktonen
dc.subjectnet community productionen
dc.subjectMediterranean Seaen
dc.titleExperimental assessment of cumulative temperature and UV-B radiation effects on Mediterranean plankton metabolismen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalFrontiers in Marine Scienceen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionThe UWA Oceans Institute and School of Plant Biology, University of Western Australia, Perth, WA, Australiaen
kaust.authorMartinez Ayala, Juanen
kaust.authorDuarte, Carlos M.en
kaust.authorAgusti, Susanaen
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