Ciliate protists from Cabiúnas Lagoon (Restinga de Jurubatiba, Macaé, Rio de Janeiro) with emphasis on water quality indicator species and description of Oxytricha marcili sp. n.

Paiva, Thiago S.; Silva‐Neto, Inácio Domingos da

doi:10.1590/s1519-69842004000300010

Cited by 20 publications

(6 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The original lists of indicator species has been revised and extended by various authors (Slade ek, 1973;Slade ek et al, 1981;Foissner, 1988, Foissner et al, 1995, who have added data on the water quality and revised taxonomic errors (Paiva and Silva-Neto, 2004 Figure 8 shows the presence of indicator species of alpha-mesosaprobic and polysaprobic environments at Stations 2 and 3 and the occurrence of an indicator species of an oligosaprobic environment only at Station 1. Among the eight species included in the saprobic system that occurred exclusively at Stations 2 and 3 (Table 1), only E. eurystomus is an indicator of an alpha-mesosaprobic environment.…”

Section: Physical and Chemical Analysismentioning

confidence: 99%

The influence of environmental characteristics on the distribution of ciliates (Protozoa, Ciliophora) in an urban stream of southeast Brazil

2008

View full text Add to dashboard Cite

The aim of this research was to study the ciliated protozoa community at three sampling stations that receive different levels of domestic sewage along the São Pedro Stream in the municipality of Juiz de Fora, Minas Gerais, Brazil, in order to determine the influence of organic pollution on this community and to assess the feasibility of using ciliates as water quality indicators. Four physical-chemical parameters of the water samples were evaluated: dissolved oxygen concentration, electrical conductivity, pH and temperature. The sediment was obtained manually, using dredges with capacity of 300 mL, at each collection point. Point 1 was located in a rural region that receives a low sewage load, while Points 2 and 3 were located in populated regions receiving high sewage loads. We found 22 ciliate species, of which 18 are included in the saprobic system and are considered bioindicators. These showed beta-mesosaprobic environments at Point 1 and alfa-mesosaprobic to polisaprobic environments at Points 2 and 3. The low levels of dissolved oxygen and the high electrical conductivity values at Points 2 and 3, together with the strong similarity between the ciliate taxocenoses of these points and the weak similarity between Point 1 and the other two, confirm the high sewage loads received at the latter two points. The combination of the biological indicators and physical-chemical analyses therefore proved itself to be an efficient method of evaluating water quality, and has excellent potential to support decisions on the conservation of headwaters and recuperation of degraded environments in lotic systems.Keywords: ciliated protozoa, organic pollution, water quality, watercourses. Influência das características ambientais sobre distribuição dos ciliados(Protozoa, Ciliophora) em um córrego urbano no sudeste brasileiro ResumoO objetivo deste trabalho foi estudar a comunidade de protozoários ciliados em três estações amostrais, que recebem diferentes níveis de lançamento de esgoto doméstico, ao longo do córrego São Pedro, Juiz de Fora, MG, a fim de se determinar a influência da poluição orgânica sobre a composição e distribuição desta comunidade e avaliar a viabilidade da utilização dos ciliados como indicadores da qualidade da água. Foram mensurados quatro parâmetros físico-quími-cos da água amostrada: teor de oxigênio dissolvido, condutividade elétrica, pH e temperatura. Amostras do sedimento foram obtidas manualmente com o auxílio de dragas, com capacidade de 300 mL, em cada ponto de coleta. O ponto 1, localizado em uma região rural, recebe baixa carga de esgoto, enquanto os pontos 2 e 3, localizados em regiões com ampla ocupação humana, recebem altas cargas de esgoto. Foram registradas 22 espécies de ciliados, sendo que 18 estão incluídas no sistema sapróbio e são consideradas bioindicadoras de ambientes beta-mesossapróbio no ponto 1 e de alfa a polissapróbio nos pontos 2 e 3. Os baixos valores de oxigênio dissolvido e os altos valores de condutividade elétrica registrados nas estações 2 e 3, juntamente com a...

show abstract

Section: Physical and Chemical Analysismentioning

confidence: 99%

The influence of environmental characteristics on the distribution of ciliates (Protozoa, Ciliophora) in an urban stream of southeast Brazil

2008

View full text Add to dashboard Cite

show abstract

“…and Loxodes sp. ciliates in P2 was unexpected since both species have a preference for environments with a lower concentration of dissolved oxygen and relationships with affected areas, including the occurrence of raw sewage from wastewater treatment plants (SIQUEIRA-CASTRO et al, 2016;SILVA -NETO, 2004). We hypothesize that even though it is an area with a higher degree of environmental preservation, some rural propertiesare located close to the collection site, with the possibility of pesticides and other compounds not analyzed in the study that may be modifying the biodiversity of species of free-living protozoa.…”

Section: Taxonomy and Composition Of Free-living Protozoa In Vivomentioning

confidence: 99%

Free-living protozoa (ciliophora, excavata and amoebozoa) in two water sources for human supply in the municipality of Blumenau, SC

Grott

Greinert-Goulart

Castro

et al. 2022

CeN

View full text Add to dashboard Cite

The knowledge of the diversity of free-living protozoa in aquatic ecosystems represents an important tool in environmental quality management. It has been widely used in studies evaluating the water quality of fresh-water sources with environmental variables. Therefore, this study aimed to verify the diversity of free-living protozoa in two water sources used as a public supply for human consumption in the municipality of Blumenau, SC, for 12 months. Water samples were collected monthly for analysis of environmental variables and for identification of organisms. In total, 39 taxa were recorded in P1 and P2, both in the readings performed on the day of collection and in the cultivation. In P1, 11 taxa were identified in the readings of the day of collection, and after reading the cultivation, 20 new taxa were recorded. P2 presented 12 taxa in the readings performed on the day of collection and 10 new taxa in the cultivations' readings. Ciliates were the most expressive group in the period, with 69.5% frequency in P1 and 66.1% in P2. The results of the environmental variables in conjunction with the survey of the free-living protozoa of P1 and P2 did not show marked differences between the points. Still, they contributed to the knowledge of the diversity of protozoa in aquatic environments.

show abstract

“…According to some studies, ciliates are efficient quality bioindicators of freshwater environments and can be used in biomonitoring of streams, lakes and reservoirs under different levels of anthropogenic impact (Paiva and Silva-Neto, 2004;Madoni, 2005;Dias et al, 2008). In this sense, these organisms have favorable characteristics, being a large group found in all aquatic environments (Zingel, 2005), with short life cycle and high reproduction rate, allowing the detection of environmental impacts in a short timescale (Groliére et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

Protozoa ciliates community structure in urban streams and their environmental use as indicators

et al. 2016

View full text Add to dashboard Cite

The objective of this work was to investigate the patterns of diversity and abundance of ciliates protozoa community in three tropical urban streams and verify which species can be considered bioindicators of water quality. In each stream, three regions (headwater, middle and mouth) were sampled in two years, in the rainy and dry seasons. The abiotic factors (dissolved oxygen, pH, temperature, turbidity, width, depth, flow and conductivity) and biotic factors (total coliforms, bacterioplankton, chlorophyll and flagellates) were analyzed using appropriate methods and ciliates were identified and counted through specialized literature. We identified 84 species distributed into 24 orders. Peniculida was the most representative order followed by Prorodontida. The RDA scores showed a spatial difference between streams. On the other hand, regarding the temporal variation, there was no separation of the sampled data. The Indval analysis showed ten species indicators, such as Coleps hirtus, Euplotes moebiusi and Tintinidium pusillum. The Cluster analysis per stream versus period showed a greater distinction of the streams in the dry season. On the other hand, a low similarity was observed between sections within the same stream. In summary, the results indicated that the ciliates can be used as important tools as bioindicators in lotic environments affected by different degrees of pollution, due to the fact that they have short life cycle, allowing the detection of impacts on a small time scale, as well as by having direct answers to environmental changes and high sensitivity to contaminants.Keywords: protists, urban stream, diversity, abundance, trophic. Estrutura da comunidade de protozoários ciliados em córregos urbanos e sua utilização como indicadoresResumo O objetivo deste trabalho foi investigar os padrões de diversidade e abundância da comunidade de protozoários ciliados em três córregos urbanos tropicais, bem como verificar quais espécies podem ser consideradas bioindicadoras da qualidade da água. Em cada córrego foram amostradas três regiões (cabeceira, intermediária e foz) em dois anos, nas estações chuvosa e seca. Os fatores abióticos (oxigênio dissolvido, pH, temperatura, turbidez, largura, profundidade, fluxo e condutividade) e fatores bióticos (coliformes totais, bacterioplâncton, clorofila e flagelados) foram analisados por metodologia específica e os ciliados foram contados e identificados por meio de literatura especializada. Foram identificadas 84 espécies distribuídas em 24 ordens. Peniculida foi a ordem mais representativa, seguida por Prorodontida. Os escores da RDA mostraram uma diferença espacial entre os córregos. Por outro lado, em relação à variação temporal, não houve separação entre os dados amostrados. A análise Indval mostrou dez espécies indicadoras, como Coleps hirtus, Euplotes moebiusi e Tintinidium pusillum. A análise de Cluster realizada por riacho versus período evidenciou uma maior distinção dos córregos no período seco. Por outro lado, foi observada uma baixa similaridade e...

show abstract

Ciliate protists from Cabiúnas Lagoon (Restinga de Jurubatiba, Macaé, Rio de Janeiro) with emphasis on water quality indicator species and description of Oxytricha marcili sp. n.

Cited by 20 publications

References 14 publications

The influence of environmental characteristics on the distribution of ciliates (Protozoa, Ciliophora) in an urban stream of southeast Brazil

The influence of environmental characteristics on the distribution of ciliates (Protozoa, Ciliophora) in an urban stream of southeast Brazil

Free-living protozoa (ciliophora, excavata and amoebozoa) in two water sources for human supply in the municipality of Blumenau, SC

Protozoa ciliates community structure in urban streams and their environmental use as indicators

Contact Info

Product

Resources

About