Extreme oxygen dynamics in shallow water of a fully marine Irish sea lough

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dc.contributor.authorTrowbridge, Cynthia D.
dc.contributor.authorDavenport, John
dc.contributor.authorCottrell, Dylan M.
dc.contributor.authorHarman, Luke
dc.contributor.authorPlowman, Caitlin Q.
dc.contributor.authorLittle, Colin
dc.contributor.authorMcAllen, Rob
dc.contributor.funderNational Science Foundationen
dc.date.accessioned2017-08-17T12:10:47Z
dc.date.available2017-08-17T12:10:47Z
dc.date.issued2017-02-02
dc.date.updated2017-08-17T12:01:47Z
dc.description.abstractThe benthos of Lough Hyne (Europe’s first marine reserve) in SW Ireland has changed dramatically in the past decade with declining invertebrate communities and proliferating ephemeral macroalgae. In summer 2011 and 2012, we measured dissolved oxygen (DO) levels on shallow subtidal rocky shores of the lough and recorded both benthic hypoxia (<2 mg O2 L−1) and hyperoxia (∼10–16 mg O2 L−1). In late summer 2013, we systematically characterized the spatial and temporal patterns of DO in the lough seawater. Daytime DO levels were hyperoxic either at or near the rocky shore, declined with increased distance for the first 5 m offshore, then stabilized at normoxic levels (∼8 mg O2 L−1). DO levels above and below rocks were variable and often showed large differences (max. difference of 15.6 mg O2 L−1), particularly at rocky shore sites with low current flow. At night, the DO in shallow water declined, becoming hypoxic to anoxic during calm weather. These extreme oxygen fluctuations (i) are amongst the first records to report severe conditions within Irish coastal waters and (ii) could contribute to the known recent decline in benthic invertebrate diversity within the marine reserve.en
dc.description.sponsorshipNational Science Foundation (Grant INT-1130978)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationTrowbridge, C. D., Davenport, J., Cottrell, D. M., Harman, L., Plowman, C. Q., Little, C. and McAllen, R. (2017) 'Extreme oxygen dynamics in shallow water of a fully marine Irish sea lough', Regional Studies in Marine Science, 11, pp. 9-16. doi:10.1016/j.rsma.2017.01.008en
dc.identifier.doi10.1016/j.rsma.2017.01.008
dc.identifier.endpage16en
dc.identifier.issn2352-4855
dc.identifier.journaltitleRegional Studies in Marine Scienceen
dc.identifier.startpage9en
dc.identifier.urihttps://hdl.handle.net/10468/4466
dc.identifier.volume11en
dc.language.isoenen
dc.publisherElsevier Ltden
dc.rights© 2017 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectHyperoxiaen
dc.subjectHypoxiaen
dc.subjectOxygen fluctuationsen
dc.subjectLough Hyneen
dc.subjectIrelanden
dc.subjectMarine reserveen
dc.titleExtreme oxygen dynamics in shallow water of a fully marine Irish sea loughen
dc.typeArticle (peer-reviewed)en
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