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Article: Size distributions and fractal properties of particles during a simulated phytoplankton bloom in a mesocosm

TitleSize distributions and fractal properties of particles during a simulated phytoplankton bloom in a mesocosm
Authors
Issue Date1995
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/dsr2
Citation
Deep-Sea Research Part Ii, 1995, v. 42 n. 1, p. 125-138 How to Cite?
AbstractMarine snow aggregates (>500μm) composed primarily of phytoplankton are known to have fractal dimensions of 1.52 to 1.72 and are assumed to form by the physical coagulation of smaller particles. In order to study the bulk fractal properties of these smaller particles during a coagulation event, concentrations of small particles (2 to 300 μm) were measured during a simulated phytoplankton bloom in a laboratory mesocosm. Particle concentrations were presented as size distributions in terms of either solid volume or average length. Both distributions indicated that particles were continuously coagulating throughout the bloom as evidenced by a greater increase in the concentration of larger particles (50 to 300 μm in average length) than smaller particles (2 to 50 μm), and decreases in fractal dimensions. Average fractal dimensions of all particles in the size range 20-200 μm were calculated using a new method called the particle concentration technique (PCT). The PCT required both solid volume and length size distributions on the same population of particles as input. As coagulation of phytoplankton and other particles in the tank proceeded during the phytoplankton bloom (7 to 11 days after inoculation), the average fractal dimensions of these particles decreased from D = 2.49 ± 0.41, a value close to the Euclidean value of 3 for a sphere, to D = 1.68 ± 0.08, a value typical of larger marine snow aggregates. This suggests that although marine snow-sized aggregates can appear to be dominated by non-fractal particles such as phytoplankton, they are primarily formed from many types of smaller aggregates present in the water column that, on average, can have low fractal dimensions. © 1995.
Persistent Identifierhttp://hdl.handle.net/10722/150036
ISSN
2015 Impact Factor: 2.137
2015 SCImago Journal Rankings: 1.314

 

DC FieldValueLanguage
dc.contributor.authorLi, Xen_US
dc.contributor.authorLogan, BEen_US
dc.date.accessioned2012-06-26T06:01:13Z-
dc.date.available2012-06-26T06:01:13Z-
dc.date.issued1995en_US
dc.identifier.citationDeep-Sea Research Part Ii, 1995, v. 42 n. 1, p. 125-138en_US
dc.identifier.issn0967-0645en_US
dc.identifier.urihttp://hdl.handle.net/10722/150036-
dc.description.abstractMarine snow aggregates (>500μm) composed primarily of phytoplankton are known to have fractal dimensions of 1.52 to 1.72 and are assumed to form by the physical coagulation of smaller particles. In order to study the bulk fractal properties of these smaller particles during a coagulation event, concentrations of small particles (2 to 300 μm) were measured during a simulated phytoplankton bloom in a laboratory mesocosm. Particle concentrations were presented as size distributions in terms of either solid volume or average length. Both distributions indicated that particles were continuously coagulating throughout the bloom as evidenced by a greater increase in the concentration of larger particles (50 to 300 μm in average length) than smaller particles (2 to 50 μm), and decreases in fractal dimensions. Average fractal dimensions of all particles in the size range 20-200 μm were calculated using a new method called the particle concentration technique (PCT). The PCT required both solid volume and length size distributions on the same population of particles as input. As coagulation of phytoplankton and other particles in the tank proceeded during the phytoplankton bloom (7 to 11 days after inoculation), the average fractal dimensions of these particles decreased from D = 2.49 ± 0.41, a value close to the Euclidean value of 3 for a sphere, to D = 1.68 ± 0.08, a value typical of larger marine snow aggregates. This suggests that although marine snow-sized aggregates can appear to be dominated by non-fractal particles such as phytoplankton, they are primarily formed from many types of smaller aggregates present in the water column that, on average, can have low fractal dimensions. © 1995.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/dsr2en_US
dc.relation.ispartofDeep-Sea Research Part IIen_US
dc.titleSize distributions and fractal properties of particles during a simulated phytoplankton bloom in a mesocosmen_US
dc.typeArticleen_US
dc.identifier.emailLi, X:xlia@hkucc.hku.hken_US
dc.identifier.authorityLi, X=rp00222en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0028853044en_US
dc.identifier.volume42en_US
dc.identifier.issue1en_US
dc.identifier.spage125en_US
dc.identifier.epage138en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridLi, X=26642887900en_US
dc.identifier.scopusauthoridLogan, BE=7202196555en_US

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