Type analysis of Achnanthidium minutissimum and A. catenatum and description of A. tropicocatenatum sp. nov. (Bacillariophyta), a common species in Brazilian reservoirs

Marquardt, Gisele Carolina; Costa, Lívia F.; Bicudo, Denise C.; Bicudo, Carlos Eduardo de Mattos; Blanco, Saúl; Wetzel, Carlos E.; Éctor, Luc

doi:10.5091/plecevo.2017.1325

Cited by 16 publications

(21 citation statements)

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“…Regarding ecological preference trends of species, our results agree with those found in the literature, with most of the species having been reported in Brazilian reservoirs and oligotrophic environments. Occurring on Cachoeira do França, Cachoeira da Fumaça and Serraria reservoirs (first group), Achnanthidium tropicocatenatum was found in alkaline waters of good quality and with low electrolyte content (Marquardt et al, 2017b).…”

Section: Discussionmentioning

confidence: 99%

Diatom assemblages (Bacillariophyta) in six tropical reservoirs from southeast Brazil: species composition and spatial and temporal variation patterns

et al. 2018

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Aim Relationships between species composition and variation patterns in diatom assemblages over six tropical reservoirs located in Southeast Brazil were explored. Methods Surface-sediment and phytoplankton diatom assemblages were determined and Canonical Correspondence Analysis was used to verify the set of environmental variables that best explain the species composition variation among sites. Results A total of 28 diatom taxa representing 20 genera were identified using light and scanning electron microscopy. Information on their ecological preferences was also provided. Humidophila biscutella is reported for the first time in Brazil whereas Sellaphora sassiana and Humidophila brekkaensis are reported for the first time in São Paulo State. Three groups of potential water quality indicators were delineated: the first suggests oligotrophic conditions, the second is related to cold waters with low luminosity in a mixing regime, and the third is a small group of tolerant species occurring in water with high conductivity, pH and total phosphorus conditions. Conclusion present study provided the first insight into the general diatom communities over six tropical reservoirs in Southeast Brazil and provided information on their ecology and distribution aiming bioassessment. The potential of water quality indicator diatom groups here outlined are in line with those reported in the literature and reinforce the importance of PEJU for the maintenance of ecological quality of reservoirs and reference conditions for the Metropolitan Region of São Paulo water sources.

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Section: Discussionmentioning

confidence: 99%

Diatom assemblages (Bacillariophyta) in six tropical reservoirs from southeast Brazil: species composition and spatial and temporal variation patterns

et al. 2018

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“…The diatom communities of the plankton and surface sediments were taxonomically similar, demonstrating the integrative and cumulative role of the sediments. The descriptive species found in these two compartments might also be found in systems either with low or high nutrient concentrations, such as Cantareira, Alto Cotia, Guarapiranga, Cachoeira do França and Jurupara (Faustino et al, 2016;Zorzal-Almeida et al, 2017;Marquardt et al, 2017). We observed a trend toward the differentiation of plankton samples between dry and rainy periods, mainly at Tanque Grande.…”

Section: Discussionmentioning

confidence: 53%

“…In contrast, Encyonema silesiacum contributed greatly to the species abundance in the TG03 sampling station during the rainy season and was previously documented in the periphyton of lotic environments with high nutrients and conductivity (Pereira et al, 2013). On the other hand, an abundant species in Cabuçu reservoir, Achnanthidium tropicocatenatum, was recently described as characteristic of the periphyton and surface sediments in oligo-mesotrophic environments (Marquardt et al, 2017). This species can be mistaken with A. catenatum (Bily & Marvan) Lange-Bertalot, deferring by the absence of sharply pointed apices and the colony formation.…”

Section: Discussionmentioning

confidence: 99%

Influence of environmental variables on the diatom communities of oligotrophic reservoirs for public water supply (Guarulhos, Southeast Brazil)

Oliveira

Bicudo

2018

Acta Limnol. Bras.

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Aim: Our study aimed at analyzing the diatom community structure of the plankton, periphyton, and surface sediments, and their relationship with the environmental variables of two reservoirs, Tanque Grande and Cabuçu, located in the city of Guarulhos, Metropolitan Region of São Paulo. Methods Three sampling stations were stablished in each reservoir. Samples of water and periphyton were collected during the dry (August 2013) and the rainy periods (January 2014), while the sediment was sampled only during the dry period. Water abiotic limnological variables were determined and quantitative and qualitative analyses were performed after the oxidation of diatom samples. Results Both reservoirs presented low values of electrical conductivity, pH and nutrients. The diatom community was represented by 30 taxa distributed in 20 genera. The diatom diversity was higher in the plankton, with three exclusive species. All taxa collected from the surface sediments also occurred in the plankton. The periphyton was represented by six taxa that were exclusive to this habitat. Conclusion Our results indicated that the environmental variables were responsible for the limnological changes in the two reservoirs. In the studied reservoirs, the species composition of diatoms differed slightly between the plankton and the surface sediments, while we found a different community in the periphyton, with the presence of exclusive species. The two climatic periods showed differences in the abundance of species, but no considerable differences in the species composition between the two reservoirs were observed.

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“…Presently, the number of species of the genus Achnanthidium is greater than 200 (Marquardt et al 2017;Kociolek et al 2018). Only a limited number of new Achnanthidium species have been described from China (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Later, Achnanthidium was elevated to the level of genus by Round et al (1990) and Round & Bukhtiyarova (1996). Because the size of many Achnanthidium is small, and there may be few identification characteristics evident as viewed with the light microscopy (LM), and the variability of diagnostic features often overlap, this genus may be challenging to study in terms of species recognition (Karthick et al 2017;Marquardt et al 2017;Ponader & Potapova 2007).…”

Section: Introductionmentioning

confidence: 99%

Three new freshwater species of the genus Achnanthidium (Bacillariophyta, Achnanthidiaceae) from Taiping Lake, China

Yu¹,

You²,

Kociolek³

et al. 2019

Fottea

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We describe three new Achnanthidium species, A. lacustre sp. nov., A. sublanceolatum sp. nov., and A. taipingensis sp. nov., from Taiping Lake, Anhui Province (China) based on light and scanning electron microscopy. A. lacustre sp. nov. belongs to the "A. minutissimum complex" of the genus, based on it having straight external distal raphe fissures and round to elliptical areolae. Both A. sublanceolatum sp. nov., and A. taipingensis sp. nov. belong to the "A. pyrenaicum complex" of the genus, based on them having transpically-elongated areolae and deflected external distal raphe fissures. All three species are sufficiently different from other similar species based on valve outline, shape of the axial and center areas, and striae density. These three new species are all observed in benthic collections from Taiping Lake.

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Type analysis of Achnanthidium minutissimum and A. catenatum and description of A. tropicocatenatum sp. nov. (Bacillariophyta), a common species in Brazilian reservoirs

Cited by 16 publications

References 0 publications

Diatom assemblages (Bacillariophyta) in six tropical reservoirs from southeast Brazil: species composition and spatial and temporal variation patterns

Diatom assemblages (Bacillariophyta) in six tropical reservoirs from southeast Brazil: species composition and spatial and temporal variation patterns

Influence of environmental variables on the diatom communities of oligotrophic reservoirs for public water supply (Guarulhos, Southeast Brazil)

Three new freshwater species of the genus Achnanthidium (Bacillariophyta, Achnanthidiaceae) from Taiping Lake, China

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