ABOUT HEAVY METAL ACCUMULATION POTENTIAL OF SOME EVERGREEN TREES IN GREEN SPACES OF YEREVAN (ARMENIA)

Abstract

This article presents the final research on the study the metal accumulation potential of two evergreen species Thuja occidentalis L. and Juniperus virginiana involved in the green infrastructure of Yerevan-Armenia’s capital city. We studied the condition of both evergreen species, seasonal variations of heavy metal contents in their needle at the end of summer and winter, and the bio concentration factor of plants. The decreased longevity shows that both studied evergreen species are inappropriate for planting in the streets with heavy traffic or close to industrial pollution sources.