Umar, A., Yauri, B. and Muhammad, C. (2015) Acacia Nitolica as Bioindicator of Copper and Cobalt Pollution Due to Vehicular Emission along the Main Entrance Road of Usmanu Danfodiyo University, Sokoto—Nigeria. International Journal of Advanced Research in Chemical Science, 2, 1-8.

has been cited by the following article:

• TITLE: Trace Metal Concentrations in Pine Needles at Varying Elevation in Proximity to Roadways in an Urban Environment

  AUTHORS: Graham Brown, Isabella Luu, Gwen O’Sullivan

  KEYWORDS: Trace Metal Deposition, Biomonitoring, Non-Point Sources, Atmospheric Deposition

  JOURNAL NAME: Journal of Environmental Protection, Vol.8 No.6, June 28, 2017

  ABSTRACT: Conifer needles bioaccumulate atmospheric pollutants, including trace metals, and may be used to monitor variations in atmospheric concentration. Needles were analyzed to determine whether a correlation exists between elevations and trace metal concentrations in proximity to roadways and other non-point sources. Composite samples of white spruce (Picea glauca) and balsam fir (Abies balsamea) needles were collected along hillsides in eastern and western Calgary, respectively. A combined total of 11 sites was sampled along two transects of increasing elevation. Qualitative and quantitative analysis of trace metal concentrations was completed using inductively coupled plasma-mass spectrometry (ICP-MS) and synthesized using regression analysis. The concentrations of cobalt, nickel, and calcium in the samples were found to exhibit a significant (P