Canadian Forest Service Publications
ARNEWS Annual Report 1991. (Rapport annuel 1991 sur le DNARPA). 1992. Hall, J.P.; Pendrel, B.A. Forestry Canada, Headquarters, Ottawa. Information Report ST-X-5. 48 p.
Issued by: National Capital Region
Catalog ID: 6476
Language: English / French
Availability: PDF (download)
Forestry Canada‘s Acid Rain National Early Warning System (ARNEWS) has been in place since 1984 to detect early signs of damage to Canadian forests. ARNEWS is a long-term biomonitoring program designed to detect changes in forest vegetation and soils. ARNEWS plots are established and assessed by the Forest Insect and Disease Survey (FIDS) of Forestry Canada. The role of FIDS in ARNEWS is to identify all types and degrees o forest damage, separating damage caused by natural factors such as insects, diseases and weatehr, from anthropogenic factors such as management practices and air pollution.
The health of 18 conifer and 9 hardwood species from 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 and little evidence has been found of symptoms of pollution. Where pollution-like symptoms have been observed, the same symptoms could usually be accounted for by natural factors. One exception is in the Bay of Fundy area of New Brunswick where research is under way to study the possible effects of acid fog and ozone on birch.
Also available under the title:
ARNEWS Informe Anual 1991 (Spanish)