Ocupação ambiental dos oligoquetos terrestres em diferentes ambientes fitofisionômicos do Parque Estadual do Ibitipoca-MG

Resumo

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) have been found in four phytophysiognomic environments (gallery forest, campo rupestre “strictu sense”, seasonal montane semi-decidous forest and woody-gramineous fields) in Parque Estadual do Ibitipoca (21o 42’30”/21o 40’10” NS e 43o 52’/43o 54’ W) (MG). The species were collected fortnightly from april 1993 to may 1994 and monthly from october 1995 to january 1997. Rhinodrilus. curtus, R. senckenbergi e R. fafner were found only in the gallery forest. Rhinodrilus hoeglingae was found in na open formation environment (woodygramineous fields) and in the gallery forest. Rhinodrilus garbei predominated in the closed formation (seasonal montane semidecidous forest) though it can also occur in the open formation environment (campo rupestre
“strictu sense”). The five species show a preference of occurrence in certains specific environments.