Artificial mixing: A therapy measure combating cyanobacteria in Lake Nieuwe Meer

In Lake Nieuwe Meer near Amsterdam, the bloomforming cyanobacterium Microcystis aeruginosa dominates the phytoplankton in late summer and forms scums that can be a big nuisance. In Lake Nieuwe Meer the water column is stratified in summer. Microcystis can stay in the euphotic zone due to its buoyanc...

Full description

Saved in:
Bibliographic Details
Published in:Water science and technology 1995, Vol.31 (8), p.245-248
Main Authors: van der Veer, Bart, Koedood, Jan, Visser, Petra M.
Format: Article
Language:English
Subjects:
Algae
Algal scums
artificial mixing
Buoyancy
Cyanobacteria
Destratification
Euphotic zone
eutrophication
Freshwater
Lakes
Microcystis
Microcystis aeruginosa
Nuisance
Phytoplankton
Plankton
Sedimentation
stratification
Summer
Water column
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In Lake Nieuwe Meer near Amsterdam, the bloomforming cyanobacterium Microcystis aeruginosa dominates the phytoplankton in late summer and forms scums that can be a big nuisance. In Lake Nieuwe Meer the water column is stratified in summer. Microcystis can stay in the euphotic zone due to its buoyancy. Deep mixing of the lake abolishes this advantage of buoyancy of Microcystis and favours nonbuoyant algae as they will have a reduced sedimentation loss. The technique of artificial mixing has been applied in 1993 and 1994 applied in Lake Nieuwe Meer in order to reduce the growth of Microcystis. The application was successful: there has been no nuisance due to Microcystis scums. The percentage cyanobacteria of the total phytoplankton in summer decreased from ∓90% without mixing to less than 5% with mixing. Characteristics of the equipment used for destratification are presented.
ISSN:0273-1223
1996-9732
DOI:10.1016/0273-1223(95)00377-Y