Patterns of periphyton chlorophyll and dry mass in a neotropical stream: a cheap and rapid analysis using a hand-held fluorometer

Simple item page
dc.contributor.authorMoulton, Timothy P.
dc.contributor.authorSouza, Marcelo L.
dc.contributor.authorWalter, Taldi L.
dc.contributor.authorKrsulovic, Felipe A. M.
dc.date.accessioned2025-01-21T01:04:55Z
dc.date.available2025-01-21T01:04:55Z
dc.date.issued2009
dc.description.abstractPeriphyton distribution is affected by various physical, chemical and biological factors at different scales. In the present study, a cheap and rapid method of measurement was used to obtain the many samples necessary for spatial analysis of periphyton along an altitudinal gradient in a low-order stream in south-east Brazilian Atlantic rainforest. Fluorescence and turbidity were measured using a hand-held fluorometer and calibrated to the chlorophyll and dry mass of periphyton. Periphyton on the horizontal and vertical surfaces of different boulders was examined and shading and water current were measured as covariables. The three upstream sites with higher abundances of potentially grazing and bioturbing shrimps and mayflies had significantly less periphyton dry mass than the three downstream sites. Chlorophyll was positively related to water current, but not to shading. Variabilities in the dry mass and chlorophyll among boulders within sites were not associated with the distribution of shrimps and mayflies. The in vivo measurement was cheap, rapid, sensitive and reasonably precise compared with standard methods. The necessary sacrifice of detail of pigments (different chlorophylls and pheophytin) and dry mass (organic and inorganic constituents) and probably precision was compensated for by the insights gained from the ability to obtain a large number of samples in a hierarchical design.
dc.fuente.origenWOS
dc.identifier.doi10.1071/MF08081
dc.identifier.issn1323-1650
dc.identifier.urihttps://doi.org/10.1071/MF08081
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95738
dc.identifier.wosidWOS:000264640000003
dc.issue.numero3
dc.language.isoen
dc.pagina.final233
dc.pagina.inicio224
dc.revistaMarine and freshwater research
dc.rightsacceso restringido
dc.subjectbiofilm
dc.subjectcurrent
dc.subjectepilithon
dc.subjecthierarchical design
dc.subjectnested analysis
dc.subjectshade
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titlePatterns of periphyton chlorophyll and dry mass in a neotropical stream: a cheap and rapid analysis using a hand-held fluorometer
dc.typeartículo
dc.volumen60
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas