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Riqueza de espécies de Oligochaeta (Annelida, Clitellata) em duas represas do rio Tietê (São Paulo)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Pamplin, Paulo Augusto Zaitune Rocha, Odete Marchese, Mercedes |
| Copyright Year | 2005 |
| Abstract | A riqueza de especies de Oligochaeta foi investigada em duas represas construidas no curso do rio Tiete. Em cada represa foram obtidas 360 amostras de sedimento em 90 pontos de amostragem, utilizando-se uma draga Van Veen (378cm²), nos meses de janeiro, abril, julho e outubro de 2001. No total foram examinados 12.826 exemplares de oligoquetos pertencentes a 20 especies, 10 generos e 4 familias. Naididae e Dero foram a familia e o genero com maiores riquezas de especies, com 14 e 9 especies, respectivamente. Do total de especies identificadas, 6 estiveram presentes em ambas represas, sendo Branchiura sowerbyi (Tubificidae) a especie mais abundante nestes ambientes. A analise das amostras revelou que a maioria das especies de oligoquetos e rara e de frequencia de ocorrencia acidental, evidenciando que para um melhor conhecimento da riqueza de especies e realmente necessario um grande esforco amostral, com elevado numero de pontos de amostragem.(AU) The species richness of Oligochaeta was evaluated in two reservoirs belonging to Tiete River system, Bariri and Ponte Nova Reservoirs. 360 sediment samples were taken in each reservoir at 90 sampling stations using a Van Veen grab (378cm²), in the months January, April, July and October 2001. A total of 12.826 oligochaete specimens were collected, belonging to 20 species, 10 genera and 4 families. The family and genus with the highest species richness were Naididae and Dero, with 14 and 9 species, respectively. Among all species identified 6 occurred in both reservoirs, being Branchiura sowerbyi (Tubificidae) the most abundant species in them. The study also revealed that most Oligochaeta species are rare and have accidental occurrence, thus evidencing that for a better knowledge of species richness is actually necessary a great sampling effort including a large number of sampling points.(AU) |
| Starting Page | 63 |
| Ending Page | 70 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1590/S1676-06032005000100007 |
| Alternate Webpage(s) | http://www.biotaneotropica.org.br/v5n1/pt/fullpaper?bn00605012005+pt |
| Alternate Webpage(s) | https://doi.org/10.1590/S1676-06032005000100007 |
| Volume Number | 5 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
