There are a few studies on bryophytes from Brazilian Islands. Most of these studies are concentrated in the States of São Paulo and Pará. From the latter state, the Islands of Marajó, Germoplasma (in the Tucuruí dam reservoir), Algodoal-Maiandeua, and Trambioca were previously. However, considering the insular region of Belém municipality by itself, there are 39 Islands, including Combu Island, which is under environmental protection. It is formed essentially by várzea forest, one of the main types of floodplain Amazonian forests. The aim of this study was to investigate the bryoflora of Combu Island, Belém, Pará State, through species richness and record numbers of mosses and liverworts, by supplying data about the ecology and geographic distribution of the species in Brazil, besides the morphological and taxonomical comments, when necessary. The collections were carried out in 17 plots of 10 × 10 m, being nine in high várzea and eight in low várzea. In total, 72 species were identified (27 mosses and 45 liverworts). Lejeuneaceae was the most representative family with 41 species. Higher species richness and record number ware observed in high várzea.
fluvial Island; liverworts; mosses; várzea
