Desmídias (chlorophyta) de um lago de inundação de águas pretas na Amazônia central
The Amazon has a great amount of aquatic environments, influenced by the floodpulse, in which high richness of aquatic organisms is observed, in special the Desmids, organisms that are present in phytoplankton, favored by the characteristics of the Amazonian black water, which is lightly acid with...
| Autor principal: | Souza, Karla Ferreira de |
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| Grau: | Dissertação |
| Idioma: | por |
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Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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https://repositorio.inpa.gov.br/handle/1/12704 http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4770709T1 |
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oai:repositorio:1-12704 Desmídias (chlorophyta) de um lago de inundação de águas pretas na Amazônia central Souza, Karla Ferreira de Melo, Sérgio de Fitoplâncton Ciclo hidrológico The Amazon has a great amount of aquatic environments, influenced by the floodpulse, in which high richness of aquatic organisms is observed, in special the Desmids, organisms that are present in phytoplankton, favored by the characteristics of the Amazonian black water, which is lightly acid with reduced pH values and electric conductivity. This work presents a taxonomic survey of planktonic desmids of the Cutiuaú lake in National Park of Jaú in some periods of the floodpulse of Jaú River between the years of 2002-2004, and also verified the influence of these periods in the species richness of desmids. 109 samples were collected in ten stations of the Cutiuaú lake with a 25μm mesh plankton net and fixed with Transeau solution. In the moment of the sampling, limnological parameters such as depth, temperature, electric conductivity and transparency of the water were measured. The environment was characterized by depth values among 2.4 to 11.5 meters. The temperature of the water in the stations ranged between 27- 31.7°C. The pH oscillated from 3.3 to 5.2. The electric conductivity ranged from 10.8 to 68.7μS.cm-1. The values of saturation of dissolved oxygen oscillated among 6.8 and 68.7%. The transparency of the water, measured with a Secchi disk, oscillated between 0.6-1.3 meters. 105 taxa of desmids were identified and described, being 73% idenfified in specific level and 27% in infraspecifc level. The Desmidiaceae family showed a great richness with 85 taxa registerd, followed by Closteriaceae family with 17 taxa and Gonatozygaceae Family with one taxa. The genus Staurastrum Meyen belonging to the family Desmidiaceae, presented the largest number of species with 19 species, followed by Staurodesmus Teiling with 13, Euastrum Ehrenberg and Micrasterias Agardh with ten taxa each. The water level fluctuations may influence the richness of desmids species. In the increasing water level, the largest number of taxa was registered (98 species). In the decreasing water level 51 taxa were identified, in the high water level, 39 species and 23 registered taxa in the low water level. Of the 105 species registered for this study, 26 are considered as first citations of ocurrence of the species for the state of Amazonas. A região amazônica apresenta grande quantidade de ambientes aquáticos influenciados pelo pulso de inundação, nos quais se observa uma elevada riqueza de organismos aquáticos, entre os quais destacam-se as desmídias, organismos favorecidos pelas características das águas pretas amazônicas que apresentam reduzidos valores de pH e de condutividade elétrica. Este trabalho teve por objetivo realizar um inventário taxonômico das desmídias da região limnética do lago Cutiuaú, um lago de inundação de águas pretas localizado no Parque Nacional do Jaú, em diferentes períodos do ciclo hidrológico, dos anos de 2002-2004, e verificar a influência dos períodos do ciclo hidrológico na riqueza específica de desmídias. Para tanto, foram coletadas 109 amostras com rede de plâncton com 25 μm de abertura de malha em10 estações de amostragens. As amostras foram fixadas com solução Transeau e observadas posteriormente em microscópio óptico. No momento das coletas foram medidos os valores de profundidade, temperatura da água, condutividade elétrica e transparência da água. O ambiente estudado caracterizou-se por apresentar uma grande variação de profundidade, baixos valores de pH e condutividade elétrica e elevados valores de temperatura da água (27,0 - 31,7°C). Foram identificados 105 táxons de desmídias, sendo 73% identificados em nível específico e 27 % em nível infraespecífico. A família Desmidiaceae foi a que apresentou maior riqueza de espécies, 85, acompanhada da família Closteriaceae com 17 espécies e a família Gonatozygaceae apenas uma. O gênero Staurastrum Meyen foi o que apresentou o maior número de espécies, 19, seguido por Staurodesmus Teiling com 13, Euastrum Ehrenberg e Micrasterias Agardh com 10 espécies cada. Temporalmente o período de enchente apresentou o maior número de táxons, 98, seguido pelo período de vazante com 51 táxons. O período de águas altas presentou 39 táxons e o período de águas baixas 23. Das 105 espécies registradas para este estudo 26 são primeira citação de ocorrência para o estado do Amazonas. 2020-02-18T19:41:04Z 2020-02-18T19:41:04Z 2008-02-27 Dissertação https://repositorio.inpa.gov.br/handle/1/12704 http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4770709T1 por Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Instituto Nacional de Pesquisas da Amazônia - INPA Botânica |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
por |
| topic |
Fitoplâncton Ciclo hidrológico |
| spellingShingle |
Fitoplâncton Ciclo hidrológico Souza, Karla Ferreira de Desmídias (chlorophyta) de um lago de inundação de águas pretas na Amazônia central |
| topic_facet |
Fitoplâncton Ciclo hidrológico |
| description |
The Amazon has a great amount of aquatic environments, influenced by the floodpulse, in which high richness of aquatic organisms is observed, in special the Desmids, organisms that
are present in phytoplankton, favored by the characteristics of the Amazonian black water, which is lightly acid with reduced pH values and electric conductivity. This work presents a
taxonomic survey of planktonic desmids of the Cutiuaú lake in National Park of Jaú in some periods of the floodpulse of Jaú River between the years of 2002-2004, and also verified the
influence of these periods in the species richness of desmids. 109 samples were collected in ten stations of the Cutiuaú lake with a 25μm mesh plankton net and fixed with Transeau
solution. In the moment of the sampling, limnological parameters such as depth, temperature, electric conductivity and transparency of the water were measured. The environment was
characterized by depth values among 2.4 to 11.5 meters. The temperature of the water in the stations ranged between 27- 31.7°C. The pH oscillated from 3.3 to 5.2. The electric
conductivity ranged from 10.8 to 68.7μS.cm-1. The values of saturation of dissolved oxygen oscillated among 6.8 and 68.7%. The transparency of the water, measured with a Secchi disk,
oscillated between 0.6-1.3 meters. 105 taxa of desmids were identified and described, being 73% idenfified in specific level and 27% in infraspecifc level. The Desmidiaceae family
showed a great richness with 85 taxa registerd, followed by Closteriaceae family with 17 taxa and Gonatozygaceae Family with one taxa. The genus Staurastrum Meyen belonging to the
family Desmidiaceae, presented the largest number of species with 19 species, followed by Staurodesmus Teiling with 13, Euastrum Ehrenberg and Micrasterias Agardh with ten taxa
each. The water level fluctuations may influence the richness of desmids species. In the increasing water level, the largest number of taxa was registered (98 species). In the decreasing water level 51 taxa were identified, in the high water level, 39 species and 23 registered taxa in the low water level. Of the 105 species registered for this study, 26 are
considered as first citations of ocurrence of the species for the state of Amazonas. |
| author_additional |
Melo, Sérgio de |
| author_additionalStr |
Melo, Sérgio de |
| format |
Dissertação |
| author |
Souza, Karla Ferreira de |
| title |
Desmídias (chlorophyta) de um lago de inundação de águas pretas na Amazônia central |
| title_short |
Desmídias (chlorophyta) de um lago de inundação de águas pretas na Amazônia central |
| title_full |
Desmídias (chlorophyta) de um lago de inundação de águas pretas na Amazônia central |
| title_fullStr |
Desmídias (chlorophyta) de um lago de inundação de águas pretas na Amazônia central |
| title_full_unstemmed |
Desmídias (chlorophyta) de um lago de inundação de águas pretas na Amazônia central |
| title_sort |
desmídias (chlorophyta) de um lago de inundação de águas pretas na amazônia central |
| publisher |
Instituto Nacional de Pesquisas da Amazônia - INPA |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/12704 http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4770709T1 |
| _version_ |
1787144511654199296 |
| score |
11.755432 |