Polycyclic aromatic hydrocarbons alter the structure of oceanic and oligotrophic microbial food webs

Handle URI:
http://hdl.handle.net/10754/594057
Title:
Polycyclic aromatic hydrocarbons alter the structure of oceanic and oligotrophic microbial food webs
Authors:
Cerezo, Maria Isabel; Agusti, Susana ( 0000-0003-0536-7293 )
Abstract:
One way organic pollutants reach remote oceanic regions is by atmospheric transport. During the Malaspina-2010 expedition, across the Atlantic, Indian, and Pacific Oceans, we analyzed the polycyclic aromatic hydrocarbon (PAH) effects on oceanic microbial food webs. We performed perturbation experiments adding PAHs to classic dilution experiments. The phytoplankton growth rates were reduced by more than 5 times, being Prochlorococcus spp. the most affected. 62% of the experiments showed a reduction in the grazing rates due to the presence of PAHs. For the remaining experiments, grazing usually increased likely due to cascading effects. We identified changes in the slope of the relation between the growth rate and the dilution fraction induced by the pollutants, moving from no grazing to V-shape, or to negative slope, indicative of grazing increase by cascade effects and alterations of the grazers' activity structure. Our perturbation experiments indicate that PAHs could influence the structure oceanic food-webs structure.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Cerezo MI, Agusti S (2015) Polycyclic aromatic hydrocarbons alter the structure of oceanic and oligotrophic microbial food webs. Marine Pollution Bulletin 101: 726–735. Available: http://dx.doi.org/10.1016/j.marpolbul.2015.10.004.
Publisher:
Elsevier BV
Journal:
Marine Pollution Bulletin
Issue Date:
Nov-2015
DOI:
10.1016/j.marpolbul.2015.10.004
PubMed ID:
26555796
Type:
Article
ISSN:
0025-326X
Sponsors:
Ministerio de Economía y Competitividad[CTM2012-32603]; Ministerio de Ciencia e Innovación[CSD2008-00077]
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorCerezo, Maria Isabelen
dc.contributor.authorAgusti, Susanaen
dc.date.accessioned2016-01-19T13:16:54Zen
dc.date.available2016-01-19T13:16:54Zen
dc.date.issued2015-11en
dc.identifier.citationCerezo MI, Agusti S (2015) Polycyclic aromatic hydrocarbons alter the structure of oceanic and oligotrophic microbial food webs. Marine Pollution Bulletin 101: 726–735. Available: http://dx.doi.org/10.1016/j.marpolbul.2015.10.004.en
dc.identifier.issn0025-326Xen
dc.identifier.pmid26555796en
dc.identifier.doi10.1016/j.marpolbul.2015.10.004en
dc.identifier.urihttp://hdl.handle.net/10754/594057en
dc.description.abstractOne way organic pollutants reach remote oceanic regions is by atmospheric transport. During the Malaspina-2010 expedition, across the Atlantic, Indian, and Pacific Oceans, we analyzed the polycyclic aromatic hydrocarbon (PAH) effects on oceanic microbial food webs. We performed perturbation experiments adding PAHs to classic dilution experiments. The phytoplankton growth rates were reduced by more than 5 times, being Prochlorococcus spp. the most affected. 62% of the experiments showed a reduction in the grazing rates due to the presence of PAHs. For the remaining experiments, grazing usually increased likely due to cascading effects. We identified changes in the slope of the relation between the growth rate and the dilution fraction induced by the pollutants, moving from no grazing to V-shape, or to negative slope, indicative of grazing increase by cascade effects and alterations of the grazers' activity structure. Our perturbation experiments indicate that PAHs could influence the structure oceanic food-webs structure.en
dc.description.sponsorshipMinisterio de Economía y Competitividad[CTM2012-32603]en
dc.description.sponsorshipMinisterio de Ciencia e Innovación[CSD2008-00077]en
dc.publisherElsevier BVen
dc.subjectGrazingen
dc.subjectPhytoplankton growthen
dc.subjectMicrobial food websen
dc.subjectPAHsen
dc.subjectOceanic communitiesen
dc.titlePolycyclic aromatic hydrocarbons alter the structure of oceanic and oligotrophic microbial food websen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalMarine Pollution Bulletinen
dc.contributor.institutionDepartment of Global Change Research, IMEDEA (CSIC-UIB), Instituto Mediterráneo de Estudios Avanzados, Miquel Marqués 21, Esporles, Spainen
kaust.authorAgusti, Susanaen
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