A. E. Sáenz, F. Flores, L. Madrigal and J. F. Di Stefano 2007: Estimación del grado de contaminación del aire por medio de la cobertura de líquenes sobre troncos de árboles en la ciudad de San José, Costa Rica. - Brenesia68: 29-35. [RLL List # 214 / Rec.# 31430] Keywords: COSTA RICA/ AIR POLLUTION/ SAN JOSE/ CENTRAL AMERICA
Abstract: [Study of vehicular air pollution and epiphytes at 5 sites around the city. Dirinaria and Physcia taxa were most frequent at polluted sites. Overall lichen cover has increased since 1996 most likely due to the reduction in the use of leaded gasoline.]
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