<b>Effects of intensive fish-farming and domestic wastewater on the periphytic algal community in a tropical coastal lagoon (Juara, Brazil)</b> - doi: 10.4025/actascibiolsci.v35i3.17094

<p>This study aimed at evaluating the effects of the intensive fish-farming and the domestic wastewater on the structure of the phycoperiphyton community. Three experimental supports containing artificial substrate were assembled in two sampling sites: IF – region with intensive fish-farming a...

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Main Authors: Stéfano Zorzal de Almeida, Valéria de Oliveira Fernandes
Format: Article
Language:English
Published: Universidade Estadual de Maringá 2013-08-01
Series:Acta Scientiarum : Biological Sciences
Subjects:
Online Access:http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/17094
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spelling doaj-9c057c6ecb8d4fe5bbbd2d230b4334f92020-11-25T03:03:55ZengUniversidade Estadual de MaringáActa Scientiarum : Biological Sciences1679-92831807-863X2013-08-0135333534210.4025/actascibiolsci.v35i3.17094<b>Effects of intensive fish-farming and domestic wastewater on the periphytic algal community in a tropical coastal lagoon (Juara, Brazil)</b> - doi: 10.4025/actascibiolsci.v35i3.17094Stéfano Zorzal de AlmeidaValéria de Oliveira Fernandes<p>This study aimed at evaluating the effects of the intensive fish-farming and the domestic wastewater on the structure of the phycoperiphyton community. Three experimental supports containing artificial substrate were assembled in two sampling sites: IF – region with intensive fish-farming and DW – near the domestic wastewater discharge. Samplings were carried out after the 21<sup>st</sup>, 26<sup>th</sup> and 31<sup>st</sup> day of colonization. The abiotic variables evaluated were: transparency, electrical conductivity, pH, turbidity, total suspended solids, alkalinity, dissolved oxygen, water temperature and nutrients. Phycoperiphyton was examined with regard to density, richness, abundance, dominance, diversity and eveness. Nutrients (total nitrogen, nitrate, ammonia nitrogen, orthophosphate and silicate) were different among the sampling sites. Although the total density, richness, diversity and evenness of phycoperiphyton were not affected by the different impacts, the density by class had differences between the sampling sites, with Bacillariophyceae presenting higher density at IF and Cyanophyceae and Coscinodiscophyceae at DW. Four taxa have been associated with the impact by domestic wastewater, and four, to the intensive fish-farming. The density by class of phycoperiphyton was the best attribute to evaluate the effects of human activity.</p> <p class="akeyword"> </p><br />http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/17094Bacillariophyceaelate successional stagenutrientsphycoperiphytonartificial substrate
collection DOAJ
language English
format Article
sources DOAJ
author Stéfano Zorzal de Almeida
Valéria de Oliveira Fernandes
spellingShingle Stéfano Zorzal de Almeida
Valéria de Oliveira Fernandes
<b>Effects of intensive fish-farming and domestic wastewater on the periphytic algal community in a tropical coastal lagoon (Juara, Brazil)</b> - doi: 10.4025/actascibiolsci.v35i3.17094
Acta Scientiarum : Biological Sciences
Bacillariophyceae
late successional stage
nutrients
phycoperiphyton
artificial substrate
author_facet Stéfano Zorzal de Almeida
Valéria de Oliveira Fernandes
author_sort Stéfano Zorzal de Almeida
title <b>Effects of intensive fish-farming and domestic wastewater on the periphytic algal community in a tropical coastal lagoon (Juara, Brazil)</b> - doi: 10.4025/actascibiolsci.v35i3.17094
title_short <b>Effects of intensive fish-farming and domestic wastewater on the periphytic algal community in a tropical coastal lagoon (Juara, Brazil)</b> - doi: 10.4025/actascibiolsci.v35i3.17094
title_full <b>Effects of intensive fish-farming and domestic wastewater on the periphytic algal community in a tropical coastal lagoon (Juara, Brazil)</b> - doi: 10.4025/actascibiolsci.v35i3.17094
title_fullStr <b>Effects of intensive fish-farming and domestic wastewater on the periphytic algal community in a tropical coastal lagoon (Juara, Brazil)</b> - doi: 10.4025/actascibiolsci.v35i3.17094
title_full_unstemmed <b>Effects of intensive fish-farming and domestic wastewater on the periphytic algal community in a tropical coastal lagoon (Juara, Brazil)</b> - doi: 10.4025/actascibiolsci.v35i3.17094
title_sort <b>effects of intensive fish-farming and domestic wastewater on the periphytic algal community in a tropical coastal lagoon (juara, brazil)</b> - doi: 10.4025/actascibiolsci.v35i3.17094
publisher Universidade Estadual de Maringá
series Acta Scientiarum : Biological Sciences
issn 1679-9283
1807-863X
publishDate 2013-08-01
description <p>This study aimed at evaluating the effects of the intensive fish-farming and the domestic wastewater on the structure of the phycoperiphyton community. Three experimental supports containing artificial substrate were assembled in two sampling sites: IF – region with intensive fish-farming and DW – near the domestic wastewater discharge. Samplings were carried out after the 21<sup>st</sup>, 26<sup>th</sup> and 31<sup>st</sup> day of colonization. The abiotic variables evaluated were: transparency, electrical conductivity, pH, turbidity, total suspended solids, alkalinity, dissolved oxygen, water temperature and nutrients. Phycoperiphyton was examined with regard to density, richness, abundance, dominance, diversity and eveness. Nutrients (total nitrogen, nitrate, ammonia nitrogen, orthophosphate and silicate) were different among the sampling sites. Although the total density, richness, diversity and evenness of phycoperiphyton were not affected by the different impacts, the density by class had differences between the sampling sites, with Bacillariophyceae presenting higher density at IF and Cyanophyceae and Coscinodiscophyceae at DW. Four taxa have been associated with the impact by domestic wastewater, and four, to the intensive fish-farming. The density by class of phycoperiphyton was the best attribute to evaluate the effects of human activity.</p> <p class="akeyword"> </p><br />
topic Bacillariophyceae
late successional stage
nutrients
phycoperiphyton
artificial substrate
url http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/17094
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