Levantamento do número de espécies de dicotiledôneas da Amazônia legal depositadas no herbário IAN (Embrapa Amazônia Oriental)

Abstract

The herbaria in the Amazon contain valuable documentation on the plant diversity in the region, with around 700 thousand samples of botanical material. These scientific collections are sources of data that can subsidize various lines of research developed in the Amazon. This data is still not very accessible. Based on the need to know how many plant species occur in the region, the project "Determination of the number of Amazonian plant species" was elaborated to carry out a survey in the regional herbariums. The present summary deals with the survey of the IAN herbarium collection. The list of species deposited in the INPA herbarium was used as the basis for this work. Since part of the IAN herbarium collection is computerized in BRAHMS (Botanical Research And Herbarium Management System), we started the work by searching the system for information by family. Then, only the species that occur in the Amazon were selected. This information was exported to Excel and a list of species from the IAN herbarium was prepared and compared to the INPA list. In case the species was not on the INPA list, it was inserted. To date, 48 families have been listed, with 4,830 species, of which the most representative in number of species were: Leguminosae (803), Rubiaceae (491), Melastomataceae (317), Euphorbiaceae (221), Apocynaceae (214), Bignoniaceae (188) and Moraceae (173). Comparing the collections of the MG, IAN and INPA herbaria with respect to Leguminosae, Melastomataceae, Apocynaceae and Moraceae, it was observed that in the MG, the quantity of species is higher in relation to the others, certainly because it is the oldest in the region.