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dc.contributor.authorCross, J
dc.contributor.authorNimmo-Smith, Alex
dc.contributor.authorHosegood, Philip
dc.contributor.authorTorres, R
dc.date.accessioned2017-06-26T09:57:23Z
dc.date.available2017-06-26T09:57:23Z
dc.date.issued2014-08
dc.identifier.issn0924-7963
dc.identifier.issn1879-1573
dc.identifier.urihttp://hdl.handle.net/10026.1/9548
dc.description.abstract

A single tidal cycle survey in a Lagrangian reference frame was conducted in autumn 2010 to evaluate the impact of short-term, episodic and enhanced turbulent mixing on large chain-forming phytoplankton. Observations of turbulence using a free-falling microstructure profiler were undertaken, along with near-simultaneous profiles with an in-line digital holographic camera at station L4 (50° 15' N 4° 13' W, depth 50 m) in theWestern English Channel. Profiles fromeach instrumentwere collected hourly whilst following a drogued drifter. Results from an ADCP attached to the drifter showed pronounced vertical shear, indicating that the water column structure consisted of two layers, restricting interpretation of the Lagrangian experiment to the upper ̃25 m. Atmospheric conditions deteriorated during the mid-point of the survey, resulting in values of turbulent dissipation reaching a maximum of 10-4Wkg-1 toward the surface in the upper 10 m. Chain-forming phytoplankton >200 μm were counted using the data from the holographic camera for the two periods, before and after the enhanced mixing event. As mixing increased phytoplankton underwent chain breakage,were dispersed by advection through their removal from the upper to lower layer and subjected to aggregation with other suspended material. Depth averaged counts of phytoplankton were reduced from a maximum of around 2050 L-1 before the increased turbulence, to 1070 L-1 after, with each of these mechanisms contributing to this reduction. These results demonstrate the sensitivity of phytoplantkon populations to moderate increases in turbulent activity, yielding consequences for accurate forecasting of the role played by phytoplankton in climate studies and also for the ecosystem in general in their role as primary producers. © 2014 Elsevier B.V. All rights reserved.

dc.format.extent55-64
dc.languageen
dc.language.isoen
dc.publisherElsevier BV
dc.subjectTurbulence
dc.subjectL4
dc.subjectPhytoplanlcton dispersal
dc.subjectHolographic imaging
dc.subjectFlocculation
dc.titleThe dispersal of phytoplankton populations by enhanced turbulent mixing in a shallow coastal sea
dc.typejournal-article
dc.typeJournal Article
plymouth.author-urlhttps://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000337865500006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008
plymouth.issue1
plymouth.volume136
plymouth.publication-statusPublished
plymouth.journalJournal of Marine Systems
dc.identifier.doi10.1016/j.jmarsys.2014.03.009
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Biological and Marine Sciences
plymouth.organisational-group/Plymouth/PRIMaRE Publications
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA07 Earth Systems and Environmental Sciences
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Marine Institute
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
plymouth.organisational-group/Plymouth/Users by role/Researchers in ResearchFish submission
dc.identifier.eissn1879-1573
dc.rights.embargoperiodNo embargo
rioxxterms.funderNatural Environment Research Council
rioxxterms.identifier.projectMeasurement of the abundance and optical significance of sub-micron sized particles in the ocean
rioxxterms.versionofrecord10.1016/j.jmarsys.2014.03.009
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
plymouth.funderMeasurement of the abundance and optical significance of sub-micron sized particles in the ocean::Natural Environment Research Council


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