Epiphytic diatoms (Diatomeae) from Piraquara II urban reservoir, Paraná state

Abstract

MARRA, R.C., TREMARIN, P.I., ALGARTE, V.M., LUDWIG, T.V. Epiphytic diatoms (Diatomeae) from Piraquara II urban reservoir, Paraná state. Biota Neotropica. 16(4): e20160200. http://dx.doi.org/10.1590/1676-0611-BN-2016-0200Abstract: We conducted a taxonomical study of epiphytic diatoms on the macrophytes Polygonum hydropiperoides, Ludwigia peruviana and Alternanthera philoxeroides collected in the mesotrophic reservoir Piraquara II flooded in 2009, located in the state of Paraná. A total of 135 infrageneric taxa were identified, among them five at generic level and other five are first records to the state. We provided illustration, valve metrics, meristics limits and taxonomic reference for each taxon. Also, life forms and species frequency are given. The most frequent diatoms totalized 15.3% of total identified taxa and sporadic species represented 54.7%. Achnanthidium minutissimum (Kützing) Czarnecki and Brachysira neoexilis Lange-Bertalot occurred in more than 90% of analyzed samples. Among the very frequent diatoms we found other species included in Achnantidium, Fragilaria and Eunotia. The solitary Discotella stelligera (Cleve & Grunow) Houk & Klee and the short chain Aulacoseira tenella (Nygaard) Simonsen are free living species that entangle among diatoms from the biofilm. Keywords: Bacillariophyta, freshwater, macrophytes, mesotrophic, periphyton, taxonomy. Diatomáceas epifíticas (Diatomeae) no reservatório urbano Piraquara II, estado do ParanáResumo: Realizamos um estudo taxonômico das diatomáceas epifíticas nas macrófitas: Polygonum hydropiperoides, Ludwigia peruviana e Alternanthera philoxeroides, coletadas no reservatório Piraquara II, uma represa urbana mesotrófica inundada em 2009, localizado no estado do Paraná. Um total de 135 táxons infragenéricos foi determinado, entre os quais cinco foram citações pioneiras para o Estado. Ilustrações, limites métricos, merísticos e referências taxonômicas para cada táxon foram providenciadas. Também, dados sobre formas de vida e frequência das espécies foram adicionados. As diatomáceas mais frequentes totalizaram 15,3% dos táxons determinados e as espécies esporádicas representaram 54%. Achnanthidium minutissimum (Kützing) Czarnecki and Brachysira neoexilis Lange-Bertalot ocorreram em mais de 90% das amostras analisadas. Dentre as diatomáceas muito frequentes encontram-se outras espécies de Achnanthidium, Fragilaria e Eunotia. Discostella stelligera (Cleve & Grunow) Houk & Klee, uma diatomácea solitária, e Aulacoseira tenella (Nygaard) Simonsen, com cadeias curtas, são espécies livres que se emaranham entre as diatomáceas do biofilme.

Gomphonema Ehrenberg (Bacillariophyceae, Gomphonemataceae) of the São Francisco Falso River, Paraná, Brazil

“…The identification of G. pantropicum was identified as G. subtile by Marra et al (2016), also reflect the recent alteration of this taxon. Roy & Keshri (2015) describe a similar taxon, identifying it as Gomphonema cf.…”

“…Geographic distribution for Paraná State: Fazenda Rio Grande (Tremarin et al 2009b), Foz do Iguaçu (Bartozek et al 2013), Piraquara (Marra et al 2016).…”

“…Geographic distribution for Paraná State: Capitão Leônidas Marques, Cascavel, Fazenda Rio Grande, General Carneiro, Lindoeste, Maringá, Matinhos, Pontal do Paraná, Prundentópolis, Rio Negro, Santa Helena, Santa Tereza do Oeste (Tremarin et al 2009b), Piraquara (Marra et al 2016).…”

“…Geographic distribution for Paraná State: Rio Negro (Tremarin et al 2009b), Piraquara (Marra et al 2016).…”

Temporal changes in biological traits of diatom communities in response to an oil spill in a subtropical river

“…Additionally, new taxa are continuously being discovered. The aforementioned taxa were recorded previously in polluted rivers (lobo et al 2004a, b, 2016, Hermany et al 2006, Novais et al 2013 and in an eutrophic reservoir (Marra et al 2016), and are considered tolerant, in particular L. goeppertiana which has a high tolerance to TS (Céspedes-Vargas et al 2016). Based on the literature, therefore, we considered them a tolerant taxa.…”