Esporos e frutificações de fungos holocênicos de testemunho da lagoa da Ferradura (Armação dos Búzios, Rio de Janeiro, Brasil)

Abstract

Fungal spores and frutifications suggest environmental changes on Arma??o dos B?zios Peninsula (Lakes Region, Rio de Janeiro State, SE Brazil) before 7,880 years BP to current days. Holocene sediments of Ferradura Lagoon were processed by Quaternary palinological method, what made possible recovery abundant and diversified microfungi. In this study were identified 21 genera of fungal spores Deuteromycetes: Amerosporae (7), Didymosporae (4), Phragmosporae (6), Dictyosporae (1), Staurosporae (3); and one genus of frutification: Ascomycetes (Callimothallus). The identified genera were morphologically compared with modern living microfungi, which may reflect ecological interactions with certain groups of plants, such as Frasnacritetrus and grasses, Reduviasporonites/Aspergillus and Pteridophytes, and Dictyosporites/Arbuscula on Eugenia sp. (Myrtaceae) leaves, barks of some deciduous trees, and even some species of Rhamnaceae. The majority of the identified microfungi on RJ 92-5 core suggest a coastal environment with brackish waters from mangroves, moist soils and warm climate. These results agree with the Holocene paleoenvironmental characterization of eastern portion of Arma??o dos B?zios Peninsula based on pollen data. ? 2011 by the Sociedade Brasileira de Paleontologia.