Trees reveal the evolution of environmental pollution
Monday, October 8, 2018
Posted by: Dana Walker
In an article published in the journal Environmental Pollution, Brazilian researchers showed
that tree species Tipuana tipu have been successfully employed as a marker of atmospheric pollution by heavy metal and other chemical compounds in Sao Paulo, Brazil's biggest metropolis.
This Bolivia-native species commonly known as tipuana tree is ubiquitous in the city. Researchers at the University of São Paulo's Bioscience Institute (IB-USP) and Medical School (FM-USP), in collaboration with colleagues at the University of Campinas (IB-UNICAMP), have considered T. tipu the most suitable tree for measuring environmental pollution levels in São Paulo over the long term by analyzing the chemical composition of tree bark and growth rings.
Tests were carried out in order to compare the performance of three of the most common tree species in the city: privet (Ligustrum sp.), sibipiruna or partridgewood (Caesalpinia pluviosa), and tipuana.