Distribution of stream macroalgae in the eastern Atlantic Rainforest of São Paulo State, southeastern Brazil

Página do item simplificado
dc.contributor.authorBranco, Ciro Cesar Zanini [UNESP]
dc.contributor.authorNecchi Jr., Orlando [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:18:07Z
dc.date.available2014-05-27T11:18:07Z
dc.date.issued1996-10-11
dc.description.abstractFifty-two stream segments were sampled from 16 August to 13 September in 1993 in the eastern Atlantic Rainforest of São Paulo State, southeastern Brazil (22°55′-25°00′S, 44°48′-48°03′W). Forty-two macroalgal subgeneric taxa were found and the most widespread species were Audouinella pygmaea (21% of sites), Compsopogon leptoclados and Microcoleus subtorulosus (19%). Macroalgal species number per sampling site ranged from 0 to six (2.6 ± 1.7) and was positively correlated to species abundance, whereas species cover ranged from 0 to 70% of the stream bed (15.5 ± 20.8%). No significant correlation was found among macroalgal species number and abundance with any physical or chemical variable analyzed. Most sites were dominated by one or few macroalgal species, mainly, Audouinella macrospora, C. leptoclados and M. subtorulosus. No significant difference was found between the frequency distribution of variables measured for streams and for total macroalgae but the most widespread species (A. pygmaea) differed significantly for current velocity, specific conductance, turbidity and pH. Overall means for macroalgal occurrence include the following values: temperature (X̄ = 19.9°C), current velocity (X̄ = 45 cm s-1), oxygen saturation (X̄ = 66%), specific conductance (X̄ = 59.6 μS cm-1), turbidity (X̄ = 5 NTU) and pH (X̄ = 7.1). This pattern of patchy distribution and dominance by few species has been suggested as typical of stream macroalgal communities and has been ascribed to the rapid fluctuation of physical and chemical conditions. Total macroalgal species richness as well as mean species number per sampling site were considerably lower than found in similar studies of other regions. The Intermediate Disturbance Hypothesis was applied to explain these results: the same factor (high precipitation) responsible for the maintainance of the high species diversity in the surrounding forest can be, paradoxically, a constraint to the development of a more diverse macroalgal flora in streams. © 1996 Kluwer Academic Publishers.en
dc.description.affiliationIBILCE-UNESP Depto. Botânica, C.P. 136, 15.001-970 - S. Jose R. Preto, SP
dc.description.affiliationUnespIBILCE-UNESP Depto. Botânica, C.P. 136, 15.001-970 - S. Jose R. Preto, SP
dc.format.extent139-150
dc.identifierhttp://dx.doi.org/10.1007/BF00013428
dc.identifier.citationHydrobiologia, v. 333, n. 3, p. 139-150, 1996.
dc.identifier.doi10.1007/BF00013428
dc.identifier.issn0018-8158
dc.identifier.lattes5177943399251508
dc.identifier.orcid0000-0002-4099-8755
dc.identifier.scopus2-s2.0-0030303240
dc.identifier.urihttp://hdl.handle.net/11449/64861
dc.identifier.wosWOS:A1996VR84200001
dc.language.isoeng
dc.relation.ispartofHydrobiologia
dc.relation.ispartofjcr2.165
dc.relation.ispartofsjr0,896
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectBrazil
dc.subjectDistribution
dc.subjectMacroalgae
dc.subjectPeriphyton
dc.subjectRainforest
dc.subjectStream
dc.subjectcommunity composition
dc.subjectmacroalgae
dc.subjectperiphyton
dc.subjectphysical environment
dc.subjectrainforest
dc.subjectstream
dc.subjectBrazil, Sao Paulo State
dc.subjectAudouinella pygmaea
dc.subjectCompsopogon leptoclados
dc.subjectMicrocoleus subtorulosus
dc.titleDistribution of stream macroalgae in the eastern Atlantic Rainforest of São Paulo State, southeastern Brazilen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights
unesp.author.lattes5177943399251508[1]
unesp.author.orcid0000-0002-4099-8755[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt

Arquivos

Coleções

Artigos - Zoologia e Botânica - IBILCE