Shallow lake restoration and water quality management by the combined effects of polyaluminium chloride addition and benthivorous fish removal: a field mesocosm experiment

Becker, Vanessa; Araújo, Fabiana

Shallow lake restoration and water quality management by the combined effects of polyaluminium chloride addition and benthivorous fish removal: a field mesocosm experiment

Página do item simplificado Estatísticas

dc.contributor.author	Becker, Vanessa
dc.contributor.author	Araújo, Fabiana
dc.date.accessioned	2020-12-07T22:07:15Z
dc.date.available	2020-12-07T22:07:15Z
dc.date.issued	2015-12-10
dc.description.resumo	Polyaluminium chloride (PAC) has beenused in lake restoration and water quality management as a flocculent to remove algal biomass and organic matter from the water column and increase water transparency. However, benthivorous fish may suspend the sedimented flocs and reduce the efficiency of PAC in improving water quality. Therefore, we hypothesized that PAC is more efficient in reducing algal biomass, suspended solids and total phosphorus concentrations in the water, and increasing water transparency, when benthivorous fish is removed. To test this hypothesis, we performed a field experimentcombining the presence and absence of PAC (2 mg Al l-1) with the presence and absence of benthivorous fish (350 g m-2). Contrary to our hypothesis, no significant interactions were found between the effects of PAC addition and benthivorous fish removal on the measured variables. Both techniques significantly decreased chlorophyll a and phosphorus concentrations and increased water transparency, but their effects were independent of each other. The above results suggest that either of the treatments may improve water quality, but this goal would be better achieved by the combination of both techniques than by the application of one or other technique in isolation	pt_BR
dc.identifier.citation	ARAÚJO, Fabiana; BECKER, Vanessa; ATTAYDE, José Luiz. Shallow lake restoration and water quality management by the combined effects of polyaluminium chloride addition and benthivorous fish removal: a field mesocosm experiment. Hydrobiologia, [S.L.], v. 778, n. 1, p. 243-252, 10 dez. 2015. Springer Science and Business Media LLC. Disponível em <https://link.springer.com/article/10.1007%2Fs10750-015-2606-5>. Acesso em 20 out 2020. http://dx.doi.org/10.1007/s10750-015-2606-5	pt_BR
dc.identifier.doi	https://link.springer.com/article/10.1007%2Fs10750-015-2606-5
dc.identifier.issn	1573-5117
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/30888
dc.language	en	pt_BR
dc.publisher	Springer	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Coagulation	pt_BR
dc.subject	Flocculation	pt_BR
dc.subject	Biomanipulation	pt_BR
dc.subject	Prochilodus	pt_BR
dc.subject	Tropical semi-arid	pt_BR
dc.title	Shallow lake restoration and water quality management by the combined effects of polyaluminium chloride addition and benthivorous fish removal: a field mesocosm experiment	pt_BR
dc.type	article	pt_BR