Field evidence of the influence of aquatic macrophytes on water quality in a shallow eutrophic lake over a 13-year period
AIM: The main objective of this work is to describe the changes in water characteristics of a shallow subtropical lake, in periods with and without growing of macrophytes, related to periods of clear-macrophyte dominance and turbid-phytoplankton dominance states. METHODS: The study was conducted in Biguás Lake, in the south coastal plain of Brazil (32° 04' 43" S and 52° 10' 03" W). Samplings were carried out monthly between October 2000 and November 2013. The limnological variables measured in the water column were dissolved oxygen (DO), water temperature, pH, electrical conductivity (EC), chlorophyll-a, total nitrogen (TN), total phosphorous (TP) and suspended material (SM). Data were grouped according to periods with macrophyte growth dominance (MD) and without macrophytes, with phytoplankton dominance (PD), and applied t- tests among TP, TN, Chlorophyll-a and SM. During macrophyte growth we estimated the coverage (%) and biomass variation of plants. RESULTS: Over the 13 years, the lake was well oxygenated, alkaline, and with a temperature variation according to subtropical seasonality. The lower values of all of the limnological variables were verified during periods of macrophyte growth, characterizing periods of clear and turbid waters. CONCLUSIONS: The influence of aquatic macrophytes in improving water quality in this shallow lake during the studied period, reducing nutrient concentrations, chlorophyll-a and suspended material in water, favoring the maintenance of a clear water state, was verified.
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Associação Brasileira de Limnologia
2014
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oai:scielo:S2179-975X20140002000082014-10-09Field evidence of the influence of aquatic macrophytes on water quality in a shallow eutrophic lake over a 13-year periodAlbertoni,Edélti FariaPalma-Silva,CleberTrindade,Claudio Rossano TrindadeFurlanetto,Leonardo Marques floating macrophytes submerged macrophytes shallow subtropical lakes clear and turbid waters southern Brazil AIM: The main objective of this work is to describe the changes in water characteristics of a shallow subtropical lake, in periods with and without growing of macrophytes, related to periods of clear-macrophyte dominance and turbid-phytoplankton dominance states. METHODS: The study was conducted in Biguás Lake, in the south coastal plain of Brazil (32° 04' 43" S and 52° 10' 03" W). Samplings were carried out monthly between October 2000 and November 2013. The limnological variables measured in the water column were dissolved oxygen (DO), water temperature, pH, electrical conductivity (EC), chlorophyll-a, total nitrogen (TN), total phosphorous (TP) and suspended material (SM). Data were grouped according to periods with macrophyte growth dominance (MD) and without macrophytes, with phytoplankton dominance (PD), and applied t- tests among TP, TN, Chlorophyll-a and SM. During macrophyte growth we estimated the coverage (%) and biomass variation of plants. RESULTS: Over the 13 years, the lake was well oxygenated, alkaline, and with a temperature variation according to subtropical seasonality. The lower values of all of the limnological variables were verified during periods of macrophyte growth, characterizing periods of clear and turbid waters. CONCLUSIONS: The influence of aquatic macrophytes in improving water quality in this shallow lake during the studied period, reducing nutrient concentrations, chlorophyll-a and suspended material in water, favoring the maintenance of a clear water state, was verified.info:eu-repo/semantics/openAccessAssociação Brasileira de LimnologiaActa Limnologica Brasiliensia v.26 n.2 20142014-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2014000200008en10.1590/S2179-975X2014000200008 |
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Albertoni,Edélti Faria Palma-Silva,Cleber Trindade,Claudio Rossano Trindade Furlanetto,Leonardo Marques |
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Albertoni,Edélti Faria Palma-Silva,Cleber Trindade,Claudio Rossano Trindade Furlanetto,Leonardo Marques Field evidence of the influence of aquatic macrophytes on water quality in a shallow eutrophic lake over a 13-year period |
| author_facet |
Albertoni,Edélti Faria Palma-Silva,Cleber Trindade,Claudio Rossano Trindade Furlanetto,Leonardo Marques |
| author_sort |
Albertoni,Edélti Faria |
| title |
Field evidence of the influence of aquatic macrophytes on water quality in a shallow eutrophic lake over a 13-year period |
| title_short |
Field evidence of the influence of aquatic macrophytes on water quality in a shallow eutrophic lake over a 13-year period |
| title_full |
Field evidence of the influence of aquatic macrophytes on water quality in a shallow eutrophic lake over a 13-year period |
| title_fullStr |
Field evidence of the influence of aquatic macrophytes on water quality in a shallow eutrophic lake over a 13-year period |
| title_full_unstemmed |
Field evidence of the influence of aquatic macrophytes on water quality in a shallow eutrophic lake over a 13-year period |
| title_sort |
field evidence of the influence of aquatic macrophytes on water quality in a shallow eutrophic lake over a 13-year period |
| description |
AIM: The main objective of this work is to describe the changes in water characteristics of a shallow subtropical lake, in periods with and without growing of macrophytes, related to periods of clear-macrophyte dominance and turbid-phytoplankton dominance states. METHODS: The study was conducted in Biguás Lake, in the south coastal plain of Brazil (32° 04' 43" S and 52° 10' 03" W). Samplings were carried out monthly between October 2000 and November 2013. The limnological variables measured in the water column were dissolved oxygen (DO), water temperature, pH, electrical conductivity (EC), chlorophyll-a, total nitrogen (TN), total phosphorous (TP) and suspended material (SM). Data were grouped according to periods with macrophyte growth dominance (MD) and without macrophytes, with phytoplankton dominance (PD), and applied t- tests among TP, TN, Chlorophyll-a and SM. During macrophyte growth we estimated the coverage (%) and biomass variation of plants. RESULTS: Over the 13 years, the lake was well oxygenated, alkaline, and with a temperature variation according to subtropical seasonality. The lower values of all of the limnological variables were verified during periods of macrophyte growth, characterizing periods of clear and turbid waters. CONCLUSIONS: The influence of aquatic macrophytes in improving water quality in this shallow lake during the studied period, reducing nutrient concentrations, chlorophyll-a and suspended material in water, favoring the maintenance of a clear water state, was verified. |
| publisher |
Associação Brasileira de Limnologia |
| publishDate |
2014 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2014000200008 |
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