Vol 13 Num 4




Freshwater turbellarians (Platyhelminthes) in irrigated rice fields of the Coastal Plain in southern Brazil

Dioneia Conceição da Vara

Universidade do Vale do Rio dos Sinos – UNISINOS
Instituto de Pesquisas de Planárias e Programa de Pós-Graduação em Biologia - CEP 93022-000 São Leopoldo, RS, Brasil
Ana Maria Leal-Zanchet

Universidade do Vale do Rio dos Sinos – UNISINOS
Instituto de Pesquisas de Planárias e Programa de Pós-Graduação em Biologia - CEP 93022-000 São Leopoldo, RS, Brasil
email: zanchet@unisinos.br

keywords
microturbellarians, triclads, diversity, inventory, temporary wetlands

publication date: 11-11-2013





Abstract
Turbellarians occur in a variety of wetlands, being also abundant in temporary water bodies. Several turbellarians are top predators in their microhabitats, many of them feeding on zooplankton. However, they are seldom taken into account in biodiversity studies. Information on turbellarian diversity in Brazilian freshwater ecosystems mainly came from taxonomical studies. In southern Brazil, there are a high number of wetlands, most of them represented by rice fields. Despite their impact on natural areas, these managed ecosystems can play an important role in freshwater biodiversity conservation. The aim of the present work was to report on an inventory done in irrigated rice fields of three areas of the Coastal Plain of southern Brazil, viz. Cachoeirinha, Santo Antônio da Patrulha e Camaquã. We found 144 species of freshwater turbellarians, distributed in six taxonomic groups (Catenulida, Macrostomida, Lecithoepitheliata, Proseriata, Rhabdocoela, and Tricladida). Twenty-three species are recorded for the first time for Brazil. Catenulida showed the highest relative abundance in Cachoeirinha, followed by Rhabdocoela. In Santo Antônio and Camaquã, Tricladida had the highest relative abundance, followed by Catenulida. Results suggest that some turbellarian species show a high level of habitat specificity with only 38% of the registered turbellarians occurring in a single study area. Although there is a paucity of turbellarian inventories in Brazilian natural wetlands, hampering a comparison between natural and managed wetlands, results indicate high species richness in the areas studied.

how to quote this paper
Vara, D. C. and Leal-Zanchet, A. M. Freshwater turbellarians (Platyhelminthes) in irrigated rice fields of the Coastal Plain in southern Brazil. Biota Neotrop.  Oct/Dec 2013 vol. 13, no. 4 http://www.biotaneotropica.org.br/v13n4/en/abstract?inventory+bn02013042013 ISSN 1676-0603.



Fundação de Amparo | Pesquisa do Estado de São Paulo, Fapesp
Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq
© BIOTA NEOTROPICA, 2013