Mailor Wellinton Wedig Amaral, G. Medeiros, Vanessa Daufenbach, S. C. Sampaio, R. R. Reis, T. A. Ludwig, N. C. Bueno
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引用次数: 0
Abstract
Epilithic diatom species in eight sampling sites of the Cascavel River, Southern Brazil, were taxonomically analyzed. The studied streams are located in a predominantly urban micro-watershed, with distroferric red latosol (rich in Fe and Al), being characterized by distinct metals, predominantly acidic pH, and high conductivity. Overall, 221 diatom species were identified at infrageneric level. Pinnularia was the most representative genus in number of species (28 spp.), followed by Eunotia (25 spp.), Gomphonema (17 spp.), Nitzschia (14 spp.), and Navicula (11 spp.). This is the first record of Fragilaria spectra, Fragilaria tenera var. nanana and Humidophila arcuatoides for the state of Paraná, and the first record of Pinnularia laucensis in Brazil. We found teratological valves in 34 taxa, containing modified outline, changes in the striae pattern, and doubled central area. The genus Eunotia showed the highest number of altered taxa (8 spp.). Mixed teratologies (deformed valve outline + unusual striae pattern) were found only in Ulnaria ulna, Encyonema neomesianum, and Gomphonema graciledictum. The metals and environmental variables in the Cascavel River micro-watershed likely contributed to the diatom teratologies. Our work contributes to the taxonomic knowledge of epilithic diatoms in the region, as well as extending the record of teratological taxa in the literature.
期刊介绍:
Phytotaxa is a peer-reviewed, international journal for rapid publication of high quality papers on any aspect of systematic and taxonomic botany, with a preference for large taxonomic works such as monographs, floras, revisions and evolutionary studies and descriptions of new taxa. Phytotaxa covers all groups covered by the International Code of Nomenclature foralgae, fungi, and plants ICNafp (fungi, lichens, algae, diatoms, mosses, liverworts, hornworts, and vascular plants), both living and fossil. Phytotaxa was founded in 2009 as botanical sister journal to Zootaxa. It has a large editorial board, who are running this journal on a voluntary basis, and it is published by Magnolia Press (Auckland , New Zealand). It is also indexed by SCIE, JCR and Biosis.
All types of taxonomic, floristic and phytogeographic papers are considered, including theoretical papers and methodology, systematics and phylogeny, monographs, revisions and reviews, catalogues, biographies and bibliographies, history of botanical explorations, identification guides, floras, analyses of characters, phylogenetic studies and phytogeography, descriptions of taxa, typification and nomenclatural papers. Monographs and other long manuscripts (of 60 printed pages or more) can be published as books, which will receive an ISBN number as well as being part of the Phytotaxa series.