Canadian Forest Service Publications

ARNEWS annual report 1994. (Rapport annuel 1994 sur le DNARPA). 1996. Hall, J.P. Natural Resources Canada, Canadian Forest Service, Headquarters, Science Branch, Ottawa. Information Report ST-X-11. 26 p.

Year: 1996

Issued by: National Capital Region

Catalog ID: 10262

Language: English / French

Series: Information Report (CFS - Ottawa)

Availability: PDF (download)

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Abstract

The 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. In 1993, the ARNEWS network was expanded and the methods for assessing crown condition were revised. ARNEWS plots are established and assessed by the Forest Insect and Disease Survey (FIDS) of the Canadian Forest Service. The role of FIDS in ARNEWS is to identify the types and degree of damage to forests, whether caused by natural factors such as insects, diseases, and weather, or anthropogenic factors such as management practices and air pollution. The health of the major forest species across Canada is described. There has been no indication of a large-scale decline in forest health. However, there are symptoms of forest decline and these warrant further investigation. In the Bay of Fundy area of New Brunswick, dieback on birch is coincident with the presence of acid fog and high levels of tropospheric ozone. Needle flecking has been observed on conifers in Nova Scotia and New Brunswick, and its cause has yet to be verified.

Also available under the title:
Informe Anual 1994 sobre el SNDTLA (Spanish)