Distribuição vertical dos oligoquetos terrestres em diferentes ambientes fitofisionômicos do Parque Estadual do Ibitipoca-MG

Alexandre de Castro, GilsonDAgosto, Marta

The vertical distribution of five species of Rhinodrilus Perrier, 1872 (R. curtus Stephenson, 1931; R. senckenbergi Michaelsen, 1931; R. hoeflingae Righi, 1980; R. garbei Michaelsen, 1926 e R. fafner Michaelsen, 1918) were studied in four phytophysiognomic environments (gallery forest, campo rupestre strictu sense seasonal montane semideciduous forest and woody-gramineous fields) in Parque Estadual do Ibitipoca ((21o 4230/21o 4010 NS e 43o 52/43o 54W) (MG), fortnightly from april 1993 to may 1994 and monthly from october 1995 to january 1997. In the gallery forest environment the five species have been found between 0 and 5cm whereas R. curtus, R. senckenbergi e R. garbei have been found between 5 and 10cm and R. fafner at 25cm. The species R. garbei have been found in the campo rupestre strictu sense and seasonal montane semidecidous forest phytophysiognomic environments between 0 and 2cm and 10 and 15cm, respectively. In the woody-gramineous fields, R. hoeflingae was found at 2 cm. The species Rhinodrilus show differentiated vertical distribution in the various phytophysiognomic environments of Parque Estadual do Ibitipoca and are found between 0 and 25cm in the substrate.