Levantamento preliminar de liquens epifíticos comumente utilizados como bioindicadores da qualidade do ar na estação ecológica da UFMG, Brasil: gêneros parmotrema e canoparmelia

Abstract

Due to the growing problems associated with air pollution in major urban industrial centers that reach not only the environment and population health, monitoring the air quality becomes an essential tool for the control, evaluation and prevention of impacts. For any study of biomonitoring of air quality using lichens, is essential to know the lichen community of the studied area. In Brazil the main family used as a bioindicator of air quality is the Parmeliaceae, especially the genera Parmotrema and Canoparmelia. The present study aimed to report the occurrence of these genera at the Ecological Station of UFMG, MG, Brazil and serve as input for future biomonitoring studies. The methodology used was based on the selection of samples of interest with subsequent analysis of morphological and chemical (reaction with potassium hydroxide 20% v/v and commercial sodium hypochlorite) in the field. The identification of morphotypes were performed with the aid of identification keys in the literature. In the study site were reported 27 different morphotypes, so the most frequent morphotypes were Canoparmelia crozalsiana (21.9%) and Parmotrema tinctorum (9.8%). The morphotypes Parmotrema sp7, Myelochoroa lindmanni and Morphotype II (unidentified) had frequency of 4.9% each. The other morphotypes had equal frequencies (2.5% each).