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Chemical consequences of oxygenation in a shallow eutrophic
lake studied with mesocosms
N. Riccardi1 &
M. Mangoni2
1Department of
Environmental Sciences, University of Venice,
Campo Celestia 2737/8,30122 Venice, Italy
2lnstitute of the Environment,
Joint Research Centre, Commission of the
European Communities, 21020 lspra, Varese, Italy
Received 1 February 1995; accepted
in revised form 12 October 1995
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Abstract
To assess the effects of oxygenation in a shallow,
highly eutrophic lake, an experiment with large enclosures was carried
out. From the results two main effects can be expected from the
oxygenation of the whole lake: (a) fish mortality and the resulting
putrefactive processes would be avoided; (b) an increase in nitrogen
and phosphorus concentration and, consequently, in the trophic level
of the lake would probably occur.
Keywords: anoxic conditions, nutrients, phytoplankton biomass
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