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The Symposium on Shallow Lakes, held from 23rd-30th, September
1979, at the Biological Research Station, IlImitz (Austria), was
intended to give an insight into current European research on
shallow lakes. The reason for the restriction to European
participants was firstly to gather as much information as possible
on investigations in one geographic area, and secondly the limited
time and space available. Since shallow lakes pose a number of
problems specifically related to their depth, several symposia have
been devoted to this subject. Meetings like the Symposium on the
Limnology of Shallow Waters in Tihany (Hungary), in 1973 and the
Symposium 'Flachseeforschung' in Steinhude (Fed. Rep. of Germany),
in 1974 stressed the need for further communication amongst
limnologists working in this field. Moreover several international
projects, like the OECD-Eutrophication-Program and the MaB-Project,
have included certain aspects of shallow lake limnology. It is
hoped by the editors that the proceedings presented here will
stimulate further research and a greater exchange of information in
this field.
These proceedings of a workshop of the International Association
for Phytoplankton Taxonomy and Ecology are directed specifically at
the relationship between phytoplankton ecology and the trophic
status of water bodies. Contributions address the fact that
distinctive assemblages of phytoplankton species are closely
associated with particular categories of water bodies. Particular
attention is paid to how communities are assembled and to the ways
in which environmental constraints filter the successful species.
Overview articles are included. The book will be a valuable source
of information to limnologists, algologists, and the technical
staff of all water suppliers.
These proceedings of a workshop of the International Association
for Phytoplankton Taxonomy and Ecology are directed specifically at
the relationship between phytoplankton ecology and the trophic
status of water bodies. Contributions address the fact that
distinctive assemblages of phytoplankton species are closely
associated with particular categories of water bodies. Particular
attention is paid to how communities are assembled and to the ways
in which environmental constraints filter the successful species.
Overview articles are included. The book will be a valuable source
of information to limnologists, algologists, and the technical
staff of all water suppliers.
Here we report on a 25-year long-term sequence of measures to
return a deteriorated recreational urban lake, Alte Donau in Vienna
to acceptable water quality. Metropolitan waters require focused
ecosystem management plans and intensive in-lake efforts. We
explored physico-chemical conditions, food web from viruses to fish
and water birds, the sediments, the littoral zone and the
catchment, management and urban planning, and global warming.
Several restoration techniques were tested and critically
evaluated. The final management plan was based on bi-stable theory.
During the recovery phase, numerous surplus adjustments had to be
implemented to secure sustainable achievement.
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