Cold fronts and reservoir limnology: an integrated approach towards the ecological dynamics of freshwater ecosystems

In this paper the authors discuss the effects of cold fronts on the dynamics of freshwater ecosystems of southeast South America. Cold fronts originating from the Antarctic show a monthly frequency that promotes turbulence and vertical mixing in reservoirs with a consequence to homogenize nutrient d...

Full description

Bibliographic Details
Main Authors: JG. Tundisi, T. Matsumura-Tundisi, KC. Pereira, AP. Luzia, MD. Passerini, WAC. Chiba, MA. Morais, NY. Sebastien
Format: Article
Language:English
Published: Instituto Internacional de Ecologia
Series:Brazilian Journal of Biology
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842010000400012&lng=en&tlng=en
id doaj-c00cc1eb9c914a9a93bd377fdcda6d04
record_format Article
spelling doaj-c00cc1eb9c914a9a93bd377fdcda6d042020-11-24T22:42:32ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-4375703 suppl81582410.1590/S1519-69842010000400012S1519-69842010000400012Cold fronts and reservoir limnology: an integrated approach towards the ecological dynamics of freshwater ecosystemsJG. Tundisi0T. Matsumura-Tundisi1KC. Pereira2AP. Luzia3MD. Passerini4WAC. Chiba5MA. Morais6NY. Sebastien7Instituto Internacional de EcologiaInstituto Internacional de EcologiaInstituto Internacional de EcologiaInstituto Internacional de EcologiaInstituto Internacional de EcologiaInstituto Internacional de EcologiaInstituto Internacional de EcologiaUniversidade Estadual do Oeste do ParanáIn this paper the authors discuss the effects of cold fronts on the dynamics of freshwater ecosystems of southeast South America. Cold fronts originating from the Antarctic show a monthly frequency that promotes turbulence and vertical mixing in reservoirs with a consequence to homogenize nutrient distribution, dissolved oxygen and temperature. Weak thermoclines and the athelomixis process immediately before, during and after the passage of cold fronts interfere with phytoplankton succession in reservoirs. Cyanobacteria blooms in eutrophic reservoirs are frequently connected with periods of stratification and stability of the water column. Cold fronts in the Amazon and Pantanal lakes may produce fish killings during the process of "friagem" associated mixing events. Further studies will try to implement a model to predict the impact of cold fronts and prepare management procedures in order to cope with cyanobacteria blooms during warm and stable water column periods. Changes in water quality of reservoirs are expected during circulation periods caused by cold fronts.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842010000400012&lng=en&tlng=encold frontsecological dynamicsreservoirsstabilityturbulencecyanobacteria bloomswater quality
collection DOAJ
language English
format Article
sources DOAJ
author JG. Tundisi
T. Matsumura-Tundisi
KC. Pereira
AP. Luzia
MD. Passerini
WAC. Chiba
MA. Morais
NY. Sebastien
spellingShingle JG. Tundisi
T. Matsumura-Tundisi
KC. Pereira
AP. Luzia
MD. Passerini
WAC. Chiba
MA. Morais
NY. Sebastien
Cold fronts and reservoir limnology: an integrated approach towards the ecological dynamics of freshwater ecosystems
Brazilian Journal of Biology
cold fronts
ecological dynamics
reservoirs
stability
turbulence
cyanobacteria blooms
water quality
author_facet JG. Tundisi
T. Matsumura-Tundisi
KC. Pereira
AP. Luzia
MD. Passerini
WAC. Chiba
MA. Morais
NY. Sebastien
author_sort JG. Tundisi
title Cold fronts and reservoir limnology: an integrated approach towards the ecological dynamics of freshwater ecosystems
title_short Cold fronts and reservoir limnology: an integrated approach towards the ecological dynamics of freshwater ecosystems
title_full Cold fronts and reservoir limnology: an integrated approach towards the ecological dynamics of freshwater ecosystems
title_fullStr Cold fronts and reservoir limnology: an integrated approach towards the ecological dynamics of freshwater ecosystems
title_full_unstemmed Cold fronts and reservoir limnology: an integrated approach towards the ecological dynamics of freshwater ecosystems
title_sort cold fronts and reservoir limnology: an integrated approach towards the ecological dynamics of freshwater ecosystems
publisher Instituto Internacional de Ecologia
series Brazilian Journal of Biology
issn 1678-4375
description In this paper the authors discuss the effects of cold fronts on the dynamics of freshwater ecosystems of southeast South America. Cold fronts originating from the Antarctic show a monthly frequency that promotes turbulence and vertical mixing in reservoirs with a consequence to homogenize nutrient distribution, dissolved oxygen and temperature. Weak thermoclines and the athelomixis process immediately before, during and after the passage of cold fronts interfere with phytoplankton succession in reservoirs. Cyanobacteria blooms in eutrophic reservoirs are frequently connected with periods of stratification and stability of the water column. Cold fronts in the Amazon and Pantanal lakes may produce fish killings during the process of "friagem" associated mixing events. Further studies will try to implement a model to predict the impact of cold fronts and prepare management procedures in order to cope with cyanobacteria blooms during warm and stable water column periods. Changes in water quality of reservoirs are expected during circulation periods caused by cold fronts.
topic cold fronts
ecological dynamics
reservoirs
stability
turbulence
cyanobacteria blooms
water quality
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842010000400012&lng=en&tlng=en
work_keys_str_mv AT jgtundisi coldfrontsandreservoirlimnologyanintegratedapproachtowardstheecologicaldynamicsoffreshwaterecosystems
AT tmatsumuratundisi coldfrontsandreservoirlimnologyanintegratedapproachtowardstheecologicaldynamicsoffreshwaterecosystems
AT kcpereira coldfrontsandreservoirlimnologyanintegratedapproachtowardstheecologicaldynamicsoffreshwaterecosystems
AT apluzia coldfrontsandreservoirlimnologyanintegratedapproachtowardstheecologicaldynamicsoffreshwaterecosystems
AT mdpasserini coldfrontsandreservoirlimnologyanintegratedapproachtowardstheecologicaldynamicsoffreshwaterecosystems
AT wacchiba coldfrontsandreservoirlimnologyanintegratedapproachtowardstheecologicaldynamicsoffreshwaterecosystems
AT mamorais coldfrontsandreservoirlimnologyanintegratedapproachtowardstheecologicaldynamicsoffreshwaterecosystems
AT nysebastien coldfrontsandreservoirlimnologyanintegratedapproachtowardstheecologicaldynamicsoffreshwaterecosystems
_version_ 1725699583639552000