Effects of irradiance and spectral composition on the establishment of macroalgae in streams in southern Brazil

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorTonetto, Aurelio Fajar
dc.creatorBranco, Ciro Cesar Zanini
dc.creatorPeres, Cleto Kaveski
dc.date2014-05-20T13:22:15Z
dc.date2014-05-20T13:22:15Z
dc.date2012-01-01
dc.date.accessioned2017-04-05T19:54:02Z
dc.date.available2017-04-05T19:54:02Z
dc.identifierAnnales de Limnologie-international Journal of Limnology. Les Ulis Cedex A: Edp Sciences S A, v. 48, n. 4, p. 363-370, 2012.
dc.identifier0003-4088
dc.identifierhttp://hdl.handle.net/11449/6520
dc.identifier10.1051/limn/2012027
dc.identifierWOS:000315949800002
dc.identifierWOS000315949800002.pdf
dc.identifierhttp://dx.doi.org/10.1051/limn/2012027
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/855402
dc.descriptionThe relative effects of irradiance and spectral composition on the colonization and development of macroalgal communities were examined in four streams exposed to full sunlight in southern Brazil. A set of solar filters surrounded the artificial substrata to provide various quantitative and qualitative light conditions. In addition to the control, the conditions were full sunlight attenuated by 50, 70 and 90%, blue light (filter transmitting 430-500 nm), green light (500-600 nm) and red light (> 600 nm). Macroalgal percent cover was determined three times during the colonization period (15, 39 and 70 days). Significant differences occurred in the mean values for macroalgal community percent cover between treatments at 15 and 39 days, suggesting that early and intermediate stages of the colonization were directly influenced by irradiance. There was an almost complete absence of macroalgae with 90% attentuation, but progressive increases with 70 and 50% attenuation. However, the mean values for macroalgal community percent cover did not differ significantly between color treatments, suggesting that the effects of irradiance on macroalgal colonization were stronger than those of spectral composition at similar intensity. The quantitative responses differed among the taxa.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languageeng
dc.publisherEdp Sciences S A
dc.relationAnnales de Limnologie-international Journal of Limnology
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectIrradiance
dc.subjectlight availability
dc.subjectlotic system
dc.subjectspectral composition
dc.subjectstream macroalgae
dc.titleEffects of irradiance and spectral composition on the establishment of macroalgae in streams in southern Brazil
dc.typeOtro


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