| المؤلفون: |
Pires PVB; Instituto Evandro Chagas, Seção de Meio Ambiente, Rod. BR-316 Km 7, s/n, Leivilândia, 67030-000 Ananindeua, PA, Brazil., Sousa EB; Instituto Evandro Chagas, Seção de Meio Ambiente, Rod. BR-316 Km 7, s/n, Leivilândia, 67030-000 Ananindeua, PA, Brazil., Gomes AL; Instituto Evandro Chagas, Seção de Meio Ambiente, Rod. BR-316 Km 7, s/n, Leivilândia, 67030-000 Ananindeua, PA, Brazil., Cunha CJS; Instituto Evandro Chagas, Seção de Meio Ambiente, Rod. BR-316 Km 7, s/n, Leivilândia, 67030-000 Ananindeua, PA, Brazil., Tavares VBDC; Instituto Evandro Chagas, Seção de Meio Ambiente, Rod. BR-316 Km 7, s/n, Leivilândia, 67030-000 Ananindeua, PA, Brazil., Pinheiro SCC; Instituto Evandro Chagas, Seção de Meio Ambiente, Rod. BR-316 Km 7, s/n, Leivilândia, 67030-000 Ananindeua, PA, Brazil., Carneiro BS; Instituto Evandro Chagas, Seção de Meio Ambiente, Rod. BR-316 Km 7, s/n, Leivilândia, 67030-000 Ananindeua, PA, Brazil., Melo NFAC; Universidade Federal Rural da Amazônia, Instituto Socioambiental e dos Recursos Hídricos, Estr. Principal da Ufra, 2150, Curió Utinga, 66077-830 Belém, PA, Brazil. |
| مستخلص: |
This study aimed to analyze the application of the Phytoplankton Community Index-PCI and Functional Groups-FG in determining the water quality of the Guamá River (Pará, Amazônia, Brazil). Samplings occurred monthly for analyses of phytoplankton and physical and chemical parameters, for two years, at the station where water was collected for human supply consumption. Seasonality influenced electrical conductivity, total suspended solids, dissolved oxygen, transparency, winds, true color, and N-ammoniacal. The ebb tide showed high turbidity and suspended solids. The density varied seasonally with the highest values occurring in September and December (61.1 ind mL-1 and 60.2 ind mL-1, respectively). Chlorophyll-a was more elevated in December (21.0 ± 4.7 µg L-1) and chlorophyll-c higher in relation to clorophyll- b indicated the dominance of diatoms. Functional Group P prevailed in the study months. Through the PCI índex the waters of Guamá River varied from reasonable to excellent and the TSI ranged from oligo to mesotrophic. The use of Functional Groups proved to be a promising tool in the determination of water quality since it covered the most abundant species in the Environment, but the PCI is not adequate to characterize Amazonian white-waters rivers, which have diatoms as the leading dominant group. |
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