thalassiosirales (diatomeae) do rio guaraguaçu, bacia litorânea, pr, brasil thalassiosirales (diatomeae) of the guaraguaçu river, littoral basin, paraná state, brazil

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2008
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Abstract
Realizou-se o inventário florístico das diatomáceas pertencentes à ordem Thalassiosirales do rio Guaraguaçu. Amostras planctônicas e perifíticas foram coletadas em seis estações ao longo do leito do rio, considerando um gradiente de salinidade sob influência da maré, rio adentro. A análise qualitativa do material permitiu a identificação de 28 espécies, sendo 19 pertencentes à família Thalassiosiraceae. Do total de táxons determinados registraram-se 85,7% marinhas/estuarinas e 14,3% dulcícolas. Cyclotella atomus Hustedt, C. choctawhatcheeana Prasad, Thalassiocyclus lucens (Hustedt) Hakansson & Mahood, Thalassiosira minima Gaarder, T. prochkinae Makarova, T. pseudonana Hasle & Heimdal, T. tealata Takano, T. tenera Proschkina-Lavrenko e Thalassiosira sp. foram os nove novos registros para o Estado do Paraná. Chaves de identificação, descrições, medidas, ilustrações em microscopia óptica e eletrônica de varredura complementam o estudo.
The floristic inventory of Thalassiosirales from Guaraguaçu river was based on planktonic and periphytic samples collected at six sampling stations throughout the river, considering a salinity gradient. A total of 28 species were identified with 19 included in Thalassiosiraceae family. Among the diatoms recorded, 85,7% were marine/estuarine and 14,3% were continental species. Cyclotella atomus Hustedt, C. choctawhatcheeana Prasad, Thalassiocyclus lucens (Hustedt) Hakansson & Mahood, Thalassiosira minima Gaarder, T. prochkinae Makarova, T. pseudonana Hasle & Heimdal, T. tealata Takano, T. tenera Proschkina-Lavrenko and Thalassiosira sp. were the nine new records for the State of the Paraná. Identification keys, taxonomic descriptions, measurements, MO and MEV illustrations complement the study.
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Authors ;Priscila Izabel Tremarin;Thelma Alvim Veiga Ludwig;Hermes Moreira Filho
Journal monatshefte für chemie chemical monthly
Year 2008
DOI
10.1590/S0102-33062008000400021
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