title: A polyethylenetherephthalate (PET) device for sampling freshwater benthic macroinvertebrates.
abstract: A new device to sample freshwater benthic macroinvertebrates was used in a low and sandy stretch of a Brazilian sub-tropical river (the River Cai, Triunfo, RS) and in one of its small tributaries, Bom Jardim brook (Arroio Bom Jardim). In this study, the effectiveness of this device, a PET sampler, was tested at different sites in the river and the brook throughout the four seasons between 2001-2002. Comparisons were made by PCA and ANOVA, both employing a bootstrap procedure based on similarity matrices. The PET sampler proved to be a reliable tool for detection of seasonal and spatial differences in richness, total abundance of organisms, and Shannon's diversity index in both river and brook and is therefore recommended for use in the monitoring of macroinvertebrate communities in this system.
authors.affiliation: Museu de Cîencias Naturais da Fundação Zoobotânica do Rio Grande do Sul, C.P. 1188, CEP 90001-970, Porto Alegre, RS, Brazil, cvolkmer@fzb.org.br
authors.forename: C
authors.initials: C
authors.lastname: Volkmer-Ribeiro
authors.forename: D L
authors.initials: DL
authors.lastname: Guadagnin
authors.forename: R
authors.initials: R
authors.lastname: De Rosa-Barbosa
authors.forename: M M
authors.initials: MM
authors.lastname: Silva
authors.forename: S
authors.initials: S
authors.lastname: Drügg-Hahn
authors.forename: V L
authors.initials: VL
authors.lastname: Lopes-Pitoni
authors.forename: H A de O
authors.initials: HA
authors.lastname: Gastal
authors.forename: M P
authors.initials: MP
authors.lastname: Barros
authors.forename: L V
authors.initials: LV
authors.lastname: Demaman
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D004784:Environmental Monitoring / Q000295:instrumentation*; D007448:Invertebrates / Q000145:classification*; D011093:Polyethylene Terephthalates; D011156:Population Density; D045483:Rivers; D012621:Seasons; D015046:Zoology / Q000295:instrumentation
chemical_list: D011093:Polyethylene Terephthalates; C025539:Lavsan