Phytoplankton primary productivity in an urban eutrophic reservoir (São Paulo, Brazil)

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorMoschini-Carlos, Viviane
dc.creatorPompêo, Marcelo Luiz Martins
dc.date2014-05-27T11:23:49Z
dc.date2016-10-25T18:26:40Z
dc.date2014-05-27T11:23:49Z
dc.date2016-10-25T18:26:40Z
dc.date2008-12-01
dc.date.accessioned2017-04-06T01:34:56Z
dc.date.available2017-04-06T01:34:56Z
dc.identifierInternational Journal of Ecology and Environmental Sciences, v. 34, n. 4, p. 307-318, 2008.
dc.identifier0377-015X
dc.identifierhttp://hdl.handle.net/11449/70860
dc.identifierhttp://acervodigital.unesp.br/handle/11449/70860
dc.identifier2-s2.0-67650714726
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/891927
dc.descriptionThe aim of this study was to analyze temporal ..d vertical variation of the biomass and of phytoplankton primary productivity in an urban eutrophic reservoir, in relation to the physical and chemical characteristics of the water. The physical and chemical variables of the water were defined in the limnetic region of the reservoir, at depths of 0.0; 0.5; 1.0; 2.0; 3.0 and 4.0 meters. Three samples were taken to define both the physical and chemical variables, concomitantly with the biomass (chlorophyll-a and phaeophytin) and phytoplankton primary productivity (C-14 method). Based on data obtained on differences in depth of the mixture zone and the euphotic zone, it is hypothesised that, depending on the time of the year, phytoplankton is conditioned by differences in the light and nutrient regimes, which change according to the constant loads of nutrients thrown into the system. The highest concentration of chlorophyll-a in the photic zone of the limnetic region was observed in November 2000 (1,197.3 mg Chl L -1) and the lowest in November 1999 (94.0 mg ChI L -1), whereas the profiles of primary activity of phytoplankton presented the highest rates on the surface of the water column, with values varying from 84.7 (May 2000) to 1,376.7mg C m -3 h -1 (December 2000). Annual primary productivity was calculated at 1,567.0gC m -2y -1, considered euproductive. The primary productivity profiles reported in this study are typical of aquatic eutrophic systems, rich in plankton and with low light penetration. It can be stated that Garças Lake is a system that suffers from anthropogenic impact, through receiving large loads of organic pollution, reflecting on the physical and chemical characteristics of the water and on the high values of biomass and primary phytoplankton activity. © National Institute of Ecology, New Delhi.
dc.languageeng
dc.relationInternational Journal of Ecology and Environmental Sciences
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAnthropogenic impact
dc.subjectGarças lake
dc.subjectTropical reservoir
dc.subjectanthropogenic effect
dc.subjectbiomass
dc.subjectchlorophyll a
dc.subjecteuphotic zone
dc.subjecteutrophic environment
dc.subjecthydrochemistry
dc.subjectorganic pollutant
dc.subjectphytoplankton
dc.subjectprimary production
dc.subjectreservoir
dc.subjecttemporal analysis
dc.subjecturban area
dc.subjectvertical distribution
dc.subjectBrazil
dc.subjectGarcas Reservoir
dc.subjectSao Paulo [Brazil]
dc.subjectSouth America
dc.titlePhytoplankton primary productivity in an urban eutrophic reservoir (São Paulo, Brazil)
dc.typeOtro


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