Benthic Bacillariophyta of the Paripe River estuary in Pernambuco state, Brazil

Abstract

The aim of this study was to evaluate the benthic diatom composition from the estuary sediment in the Pernambuco State, based on 32 samples. Samples were collected monthly from September through December 1999 (dry period) and from April through July 2000 (rainy period) during four pre-established sampling stations. Results indicated 19 families and 31 specific and infraspecific taxa. Eight new records were founded for Pernambuco State: Auliscus coelatus, Fallacia nummularia, Navicula algida, Plagiograma pulchellum, Terpsinoe americana, Triceratium antideluvianna and Tryblionella coarctata and one, Auliscus punctatus Bailey, in northeastern Brazil.Keywords: diatom, benthic, estuary. Bacillariophyta bentônicas do estuário do Rio Paripe, estado de Pernambuco, BrasilResumo O objetivo do presente estudo foi avaliar a composição das diatomáceas bênticas do sedimento estuarino do estado de Pernambuco, Brasil, com base na análise de 32 amostras. As amostragens foram realizadas mensalmente de setembro a dezembro de 1999 (período seco) e de abril a julho de 2000 (período chuvoso) em quatro estações de coleta previamente estabelecidas. As diatomáceas estiveram representadas por 19 famílias e 31 taxons específicos e infraespecíficos. Ocorreram oito novas citações para o estado de Pernambuco, quais sejam: Auliscus coelatus, Fallacia nummularia, Navicula algida, Plagiograma pulchellum, Terpsinoe americana, Triceratium antideluvianna, Tryblionella coarctata e uma, Auliscus punctatus Bailey, para a região nordeste do Brasil.Palavras-chave: diatomáceas, bentônicas, estuário.

Ecological Assessment of the River Nile Status around Gizert El-Warrak using Phytoplankton and Macroinvertebrates Assemblages

“…Phytoplankton is considered as a suitable bioindicator, they have a worldwide distribution, high reproduction rate and each species has high sensitivity towards different levels of organically polluted waters (Moura et al, 2007). Also, they are used as indicators for saprobic conditions such as salinity, acidification and eutrophication in lakes and rivers (Smith et al, 2014).…”

Seasonal Variation in the Physicochemical Characteristics and Microalgae of Selected Mangrove Ecosystems in Ernakulam

“…Temperature showed diurnal and seasonal variations [11]. In the study on the benthic Bacillariophyta of the Paripe river estuary in Brazil the temperature was found to be constant throughout the year and the pH was always alkaline [12]. In the present study the pH value ranged from 6.4 (lowest) to 7.9 (highest) .The lowest pH of 6.4 was recorded from station III during monsoon period.…”

Diatom-based water quality assessment in streams influence by urban pollution: effects of natural and two selected artificial substrates, São Carlos-SP, Brazil

“…A total of 500 -600 frustules per sample (depending on the abundance of diatoms) were identified and counted using the phase contrast light microscope (1000 X). The diatoms were identified to species level based on studies by Mizuno 1964;Patrick & Reimer 1966a, b;Bourrelly 1981;Lobo et al, 1996;John, 2000;Biggs & Kilroy 2000;Oliveira et al, 2001;Lobo et al, 2002;Lobo et al, 2004;Bicudo & Menezes 2006;Salomoni et al, 2006;Delgado et al, 2007;Moura et al, 2007;Soares et al, 2007;Zalocar de Damitrovic et al, 2007 and the website of the Phycology Section of The Academy of Natural Sciences of the USA (http://diatom.acnatsci.org).…”

“…Multiple factors prevailing at different temporal and spatial scales play an important role in structuring benthic diatom communities in lotic systems (Potapova & Charles 2002;Moura et al, 2007), with local environmental conditions playing a more important role compared to broad-scale climatic, vegetational and geographical factors (Pan et al, 1996). Each particular species requires different structural, physical and chemical characteristics intrinsic to its habitat.…”