Canadian Forest Service Publications

ARNEWS Annual Report 1992. (Rapport annuel 1992 sur le DNARPA/ARNEWS Informe Anual 1992). 1993. Hall, J.P. Canadian Forestry Service, Headquarters, Science and Sustainable Development Directorate, Ottawa. Information Report ST-X-7. 50 p.

Year: 1993

Issued by: National Capital Region

Catalog ID: 10101

Language: English / French / Spanish

Series: Information Report (CFS - Ottawa)

Availability: Order paper copy (free), PDF (download)

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Abstract

The Canadian Forestry Service's Acid Rain National Early Warning System (ARNEWS) has been in place since 1984 to detect early signs of damage to Canadian forests and to monitor changes in forest vegetation and soils. ARNEWS plots are established and assessed by the Forest Insect and Disease Survey (FIDS) of the Canadian Forestry Service. The role of FIDS in ARNEWS is to identify all types and degrees of forest damage, separating damage caused by natural factors such as insects, diseases, and weather, from anthropogenic factors such as management practices and air pollution. The health of 18 conifer and 9 hardwood species across Canada, including areas known to receive some of the highest levels of atmospheric pollution in Canada, is described. There has been no indication of a large-scale decline in the health of our forests. In addition, few symptoms of pollution were observed and where pollution-like symptoms were noted, they were accounted for by natural factors. An exception occurs in the Bay of Fundy area of New Brunswick where extensive dieback on birch is coincident with the presence of acid fog and ozone.