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Levels of Lead, Copper, and Zinc in the Forest Floor in the Northeastern United States¹

ABSTRACT

Two-hundred four quantitative samples of combined O1 and O2 horizons were collected from 51 forested sites from Virginia to Massachusetts and analyzed for lead (Pb), copper (Cu), and zinc (Zn). Overall average quantities of Pb, Cu, and Zn were 1,234±100, 170±35, and 1,013±298 mg m^–2, respectively. The data obtained represent a quantitative baseline against which future samples from the same sites can be compared in order to assess the role of the forest floor as a sink for these elements.

Key Words: anthropogenic Pb • Cu • Zn • atmospheric Pb • Cu • Zn • trace metal pollution

¹ Contribution from the Dep. of Landscape Architecture and Regional Planning and the Dep. of Geology, Univ. of Pennsylvania, Philadelphia, PA 19104, and Yale School of Forestry and Environmental Studies, New Haven, CT 06511.

² Graduate Assistant and Assistant Professor, Univ. of Pennsylvania, and Research Associate and Lecturer, Yale Univ., respectively.

Received for publication July 6, 1979.