| natural and human impacts on invertebrate communities in brazilian caves. | species richness, abundance, distribution and similarity between cave invertebrate communities were compared among seven caves located in the peruaçu river valley, north of minas gerais state, brazil. such comparisons aimed to determinate the degree of biological complexity in the sampled caves, calculated by the "index of biological complexity in caves", presented in this manuscript. the presence of potential or real impacts on the cave fauna was also investigated. a total of 1,468 individuals ... | 2001 | 11340457 |
| natural enemies of coelomera lanio (coleoptera: chrysomelidae) in the region of viçosa, minas gerais, brazil. | coelomera lanio (coleoptera: chrysomelidae) is the most important defoliator of cecropia trees. natural enemies of c. lanio collected in the region of viçosa, state of minas gerais, brazil were identified on field observations in a forest fragment and on laboratory analyses. individuals of c. lanio were not found on cecropia pachystachya trees colonized by azteca mülleri (hymenoptera: formicidae). the majority of the egg masses of c. lanio collected in the field were found to be parasitised by a ... | 2002 | 12298235 |
| [aquatic heteroptera from mariana county, minas gerais, brazil]. | in surveys carried out in lotic and lentic environments in mariana county, minas gerais state, brazil, 35 genera and 64 species of aquatic and semi-aquatic heteroptera were recorded, distributed in 13 families. thirty four species were collected in lentic environments, while in lotic environments 48 species were collected, some of them common to both environments. nepomorpha presented the greatest number of species (45), markedly for the family naucoridae, represented by 12 species. among the 19 ... | 2006 | 17273712 |
| [keys to families and genera of gerromorpha and nepomorpha (insecta: heteroptera) in the central amazonia, brazil]. | few studies have been done in brazil on aquatic and semi-aquatic gerromorpha and nepomorpha (heteroptera), minas gerais being the state where these insects have been studied the most. the present study presents keys for identification of gerromorpha and nepomorpha adults, thus providing a tool for ecological studies on aquatic insects in central amazonia. the specimens used to elaborate the taxonomic keys were collected in presidente figueiredo county in streams and artificial lakes and in manau ... | 2007 | 17607454 |