title: THE DISCOLORATION OF ROOFS IN THE UNITED STATES AND CANADA BY ALGAE(1).
abstract: Roof shingles are often colonized and discolored by blue-green and green algae. The former are mostly subaerial species and the latter are soil algae most frequently recovered from the atmosphere.
authors.affiliation: Department of Ecology and Behavioral Biology, University of Minnesota Minneapolis, Minnesota 55455.
authors.forename: A J
authors.initials: AJ
authors.lastname: Brook