Data/hora: 06/06/2024 15:32:21

Biblioteca(s): | Embrapa Soja.
Data corrente: | 30/06/2005
Data da última atualização: | 21/08/2009
Autoria: | SAUTTER, K. D.; BROWN, G. G.; PASINI, A.; BENITO, N. P.
Título: | State of the art of the taxonomic and ecological knowledge of earthworms in the state of Paraná, Brazil.
Ano de publicação: | 2004
Fonte/Imprenta: | In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY AND ECOLOGY, 14., 2004. Mont Saint Aignan. Abstracts. Mont Saint Aignan: Université de Rouen, 2004. p. 65.
Idioma: | Inglês
Conteúdo: | The State of Paraná is located in southern Brazil and has an area of almost 200,000 km².  Of these 28% are used for agricultural purposes, 34% are in pastures and 14% forested. Paraná is predominantly agricultural, and grain production reached 55 million tons in 1999. There are five main native vegetation types: Araucaria angustifolia forest, cerrado, restingas, native grassland and Atlantic forest. The last one is considered a plant and animal biodiversity hot-spot. This present paper presents the current state of the art of the taxonomic and ecological knowledge of earthworms in the State of Paraná. Despite the agricultural importance of the State and its biodiversity, few taxonomic and ecological studies had been performed with earthworms. Up to 2001, only three species of earthworms were known from the state: Amynthas corticis and A. gracilis (VOSS, 1986) and Rhinodrillus duseni (MICHAELSEN, 1918). In an ongoing project on earthworm ecology and biodiversity in Paraná, so far 19 of the 399 counties of Paraná have been sampled, adding another 14 species to the list: the exotics Dichogaster affinis, D. bolaui, unknown Dichogaster sp., Eisenia fetida, Eudrilus eugeniae and Pontoscolex corethrurus and the native species Glossoscolex sp. 1, unidentified Glossoscolecidae sp. 1, 2 and 3, unidentified sp. 1, 2 and 3 and unidentified Almidae sp. 1, Besides these at least 8 other species probably occur in Paraná: Eukerria eiseniana, E. saltensis, Diacheta spp., Opistodrillus borelli, Glossoscolex corrientes, Rhinodrillus brasiliensis, Fimoscolex sacii, and Amynthas diffringens. In total are 17 known (exotic/widespread and native) and 25 probable species for the State of Paraná, of which >40% are exotic. With further sampling efforts, many more species will probably be found. In the ecological studies, earthworms were rarely identified to the species level, but most used the exotic Amynthas spp. Quantitative samples have been performed in various environments: annual cropping (soybean, maize, wheat, beans, oats, millet) in various tillage mangement, pastures and forests (Eucalyptus, Pinus, primary forests, secondary forests). These show large populations in no-tillage and pastures, and greater diversity in native forests. Studies have also addressed the effect of exotic earthworm species (mainly Amynthas spp.) on plant parasitic nematode damage, on reclamation of degraded areas, on soil physical characteristics, on the growth of soybean, Bracatinga, black beans, oats, wheat and on Rhizobium nodulation, alrhough much more work is warranted, particularly using species native to the state.
Palavras-Chave: | Ecologia do solo.
Thesagro: | Fertilidade do Solo; Minhoca.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (25237-1) - UPC - SP - -- - 9925 -  - 9925 - DIS