Effects of hypolimnetic aeration on the quantity and quality of settling material in a eutrophied dimictic lake

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dc.contributor.author Niemistö, Juha
dc.contributor.author Silvonen, Soila
dc.contributor.author Horppila, Jukka
dc.date.accessioned 2021-01-27T10:50:01Z
dc.date.available 2021-01-27T10:50:01Z
dc.date.issued 2020
dc.identifier.citation Niemistö , J , Silvonen , S & Horppila , J 2020 , ' Effects of hypolimnetic aeration on the quantity and quality of settling material in a eutrophied dimictic lake ' , Hydrobiologia , vol. 847 , pp. 4525–4537 . https://doi.org/10.1007/s10750-019-04160-6
dc.identifier.other PURE: 141075507
dc.identifier.other PURE UUID: 4d8fcf45-1de2-4e80-b065-36bcde66269e
dc.identifier.other WOS: 000544388500001
dc.identifier.other ORCID: /0000-0003-3516-5596/work/87782973
dc.identifier.uri http://hdl.handle.net/10138/325284
dc.description.abstract Effects of hypolimnetic aeration (pumping of epilimnetic water into the hypolimnion) on the quantity of settling material in eutrophied Lake Vesijarvi, Finland were studied by comparing spatially comprehensive gross sedimentation rates as dry and organic matter prior to aeration activity and during two aerated years. Possible changes in the organic matter (as loss on ignition, LOI), carbon (C) and nitrogen (N) contents and changes in the C/N ratio of the settling material and surface sediment were quantified. Thermal stratification broke up earlier due to aeration and was followed by sedimentation peaks. The absolute amount of dry and organic matter as well as C and N settling to the lake bottom were significantly higher in the aerated years. Increased sedimentation rates were especially pronounced in the deep zones indicating enhanced sediment focusing. Increased sedimentation of C and N reflected higher primary production during the aerated years, which most likely was associated with increased temperature and turbulence and the subsequent regeneration and recycling of nutrients in the water body. Aeration seemed to slightly enhance degradation, but contrary to its ultimate aim, it failed to decrease the phosphorus content of the water column and deposits of organic material in the deep zones of the lake. en
dc.format.extent 13
dc.language.iso eng
dc.relation.ispartof Hydrobiologia
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Hypolimnetic aeration
dc.subject Sedimentation rates
dc.subject Organic matter
dc.subject C
dc.subject N ratio
dc.subject SEDIMENT
dc.subject WATER
dc.subject TEMPERATURE
dc.subject OXYGENATION
dc.subject DYNAMICS
dc.subject RELEASE
dc.subject SHALLOW
dc.subject SESTON
dc.subject RATES
dc.subject 119 Other natural sciences
dc.title Effects of hypolimnetic aeration on the quantity and quality of settling material in a eutrophied dimictic lake en
dc.type Article
dc.contributor.organization Ecosystems and Environment Research Programme
dc.contributor.organization Lake Ecosystem Dynamics
dc.contributor.organization Aquatic Biogeochemistry Research Unit (ABRU)
dc.contributor.organization Helsinki Institute of Sustainability Science (HELSUS)
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1007/s10750-019-04160-6
dc.relation.issn 0018-8158
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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