Ficoflora de ambientes lênticos: estudo preliminar da região de Charqueadas, Rio Grande do Sul, Brasil, com vistas à avaliação ambiental
São apresentados os resultados do estudo do metafíton, bentos e de comunidades fitoplanctônicas ocorrentes em ambientes lênticos de Charqueadas e municípios vizinhos, região esta sujeita à influência de mineração e processamento de carvão mineral. O estudo baseou-se em 46 amostras coletadas em julho...
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Published in | Acta botânica brasilica Vol. 1; no. 2; pp. 165 - 188 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English Portuguese |
Published |
01.07.1987
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Online Access | Get full text |
ISSN | 0102-3306 0102-3306 |
DOI | 10.1590/S0102-33061987000200006 |
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Abstract | São apresentados os resultados do estudo do metafíton, bentos e de comunidades fitoplanctônicas ocorrentes em ambientes lênticos de Charqueadas e municípios vizinhos, região esta sujeita à influência de mineração e processamento de carvão mineral. O estudo baseou-se em 46 amostras coletadas em julho e agosto de 1986. Dos 213 táxons específicos e infra-específicos identificados, 95 constituem-se em primeiro registro de ocorrência no Estado. Os grupos melhor representados quanto ao número de espécies ocorrentes foram Chlorophyta (Desmídias) e Bacillariophyta (Diatomáceas). Foi constatada presença de espécies indicadas na literatura como organismos de ambientes ácidos, com maior representatividade no bentos e metafíton de biótopos sujeitos à influência direta de rejeito de carvão. Nesses sistemas ácidos, foi registrada no fitoplâncton dominância de organismos nanoplanctônicos da classe Chrysophyceae, estando quantitativamente bem representadas, no bentos, as Euglenophyta, Bacillariophyta e Chlorophyta. A estrutura das comunidades fitoplanctônicas mostrou baixos índices de diversidade, caracterizando um desequilíbrio na composição específica das mesmas.
Metaphyton, benthos and phytoplanktonic communities occurring in lentic systems were studied in July and August 1986. The study was based on 46 samples collected in Charqueadas and other neighboring areas in the State of Rio Grande do Sul, a region which suffers the effects of coal mining and processing. Out of the 213 specific and infraspecific taxa identified, 95 are a first record in the State of Rio Grande do Sul. As far as the number of occurring species is concerned, the best represented groups were Chlorophyta (Desmids) and Bacillariophyta (Diatoms). Organisms indicative of acid systems were found, mostly in benthos and metaphyton environments subject to the influence of coal wastes. In these acid systems, phytoplankton showed nanoplanktonic organisms of the group Chrysophyceae; Euglenophyta, Bacillariophyta and Chlorophyta were all well represented in the metaphyton and benthos. The structure of the phytoplanktonic communites showed low diversity, which suggests an unbalanced composition. |
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AbstractList | São apresentados os resultados do estudo do metafíton, bentos e de comunidades fitoplanctônicas ocorrentes em ambientes lênticos de Charqueadas e municípios vizinhos, região esta sujeita à influência de mineração e processamento de carvão mineral. O estudo baseou-se em 46 amostras coletadas em julho e agosto de 1986. Dos 213 táxons específicos e infra-específicos identificados, 95 constituem-se em primeiro registro de ocorrência no Estado. Os grupos melhor representados quanto ao número de espécies ocorrentes foram Chlorophyta (Desmídias) e Bacillariophyta (Diatomáceas). Foi constatada presença de espécies indicadas na literatura como organismos de ambientes ácidos, com maior representatividade no bentos e metafíton de biótopos sujeitos à influência direta de rejeito de carvão. Nesses sistemas ácidos, foi registrada no fitoplâncton dominância de organismos nanoplanctônicos da classe Chrysophyceae, estando quantitativamente bem representadas, no bentos, as Euglenophyta, Bacillariophyta e Chlorophyta. A estrutura das comunidades fitoplanctônicas mostrou baixos índices de diversidade, caracterizando um desequilíbrio na composição específica das mesmas.
Metaphyton, benthos and phytoplanktonic communities occurring in lentic systems were studied in July and August 1986. The study was based on 46 samples collected in Charqueadas and other neighboring areas in the State of Rio Grande do Sul, a region which suffers the effects of coal mining and processing. Out of the 213 specific and infraspecific taxa identified, 95 are a first record in the State of Rio Grande do Sul. As far as the number of occurring species is concerned, the best represented groups were Chlorophyta (Desmids) and Bacillariophyta (Diatoms). Organisms indicative of acid systems were found, mostly in benthos and metaphyton environments subject to the influence of coal wastes. In these acid systems, phytoplankton showed nanoplanktonic organisms of the group Chrysophyceae; Euglenophyta, Bacillariophyta and Chlorophyta were all well represented in the metaphyton and benthos. The structure of the phytoplanktonic communites showed low diversity, which suggests an unbalanced composition. |
Author | Callegaro, Vera Lucia Maröstica Ungaretti, Ieti Werner, Vera Regina Silva, Sandra Maria Alves da Rosa, Zulanira Meyer Kremer, Lisete Maria |
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References_xml | – year: 1973 ident: ref1 – volume: 9 start-page: 1 year: 1958 ident: ref26 article-title: Zur vervollkommung der quantitativem Phytoplankton-Methdik publication-title: Verh. int. Verein, theor. angew. Limnol – start-page: 105 year: 1969 ident: ref13 – volume: 46 start-page: 149 year: 1958 ident: ref3 article-title: The survival of freshwater algae during dry periods: Part. I. An investigation of the algae of five small ponds publication-title: J. Ecol doi: 10.2307/2256910 – volume: 22 start-page: 1 issue: 1 year: 1986 ident: ref12 article-title: Estructuras comunitarias de las fitocenosis planctónicas de los sistemas de desembocaduras de rios y esteros de la zona central de Chile publication-title: Rev. Biol. Mar – volume-title: The mathematical theory of comunication year: 1949 ident: ref24 – volume: 61 start-page: 21 issn: 0065-132X issue: 1 year: 1978 ident: ref2 article-title: Oligotrophication and Eutrophication some dutch moorland pools, as reflected in theier desmid flora publication-title: Hydrobiol doi: 10.1007/BF00019021 – volume: 7 start-page: 1 year: 1973 ident: ref25 article-title: System of water Quality from the Biological Point of View publication-title: Arch. Hydrobiol – year: 1981 ident: ref6 – year: 1974 ident: ref14 – volume: 51 start-page: 281 year: 1956 ident: ref16 article-title: Ökologische Untersuchungen über die Diatomeen und Desmidiaceen des Murnauer Moores publication-title: Archiv. Hydrobiol – volume: 54 start-page: 740 year: 1939 ident: ref11 article-title: Aquatic life in waters polluted by acid mine waste publication-title: U.S. Publ. Healter Rep doi: 10.2307/4582872 – volume: 16 start-page: 77 volume-title: Úber Euglena mutabilis und ihr Verhalten zu sauren Medien year: 1953 ident: ref7 – volume: 7 start-page: 151 issue: 1-2 year: 1956 ident: ref15 article-title: Técnica para el estudio de las diatomeas publication-title: Bolm. Inst. Ocean doi: 10.1590/S0373-55241956000100009 – year: 1973 ident: ref10 – year: 1973 ident: ref23 – year: 1981 ident: ref22 – year: 1973 ident: ref21 – year: 1977 ident: ref5 – year: 1973 ident: ref20 – year: 1985 ident: ref19 – volume: 34 start-page: 181 year: 1957 ident: ref9 article-title: Die Diatomeenflora des Flussystems der Weser im Geleit der Hausestadt Bremen publication-title: Abh. Nat. Ver – year: 1976 ident: ref4 – year: 1959 ident: ref17 – volume: 16 volume-title: Euglenophyceen year: 1955 ident: ref8 – year: 1975 ident: ref18 |
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