Association of periphytic diatom species of artificial substrate in lotic environments in the Arroio Sampaio Basin, RS, Brazil: relationships with abiotic variables
Braz. j. biol
;
61(4): 523-540, Nov. 2001. ilus, mapas, tab, graf
Article
in English
| LILACS
| ID: lil-308282
RESUMO
Associations of diatom species were identified, in the Arroio Sampaio Basin, Rio Grande do Sul, Brazil, based on monthly samplings over a year along Arroio Sampaio and its main tributaries, using polyamide thread as an artificial substrate. The species groupings showed four different environments: medium-lower course of Arroio Sampaio; and lower course of Arroio Teresinha; upper course of Arroio Sampaio; and lower course of Arroio Duvidosa. Among the physical and chemical variables measured, water pollution, particularly organic contamination and eutrophication, measured from BOD5 and total phosphate concentration, respectively, appeared to be one of the most important environmental factors determining the composition and structure of species associations in the area studied
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Diatoms
/
Ecosystem
/
Fresh Water
Type of study:
Prognostic study
/
Risk factors
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Braz. j. biol
Journal subject:
Biology
Year:
2001
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Fundação Zoobotânica do Rio Grande do Sul/BR
/
Universidade Federal do Rio Grande do Sul/BR
/
Universidade de Santa Cruz do Sul/BR
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