Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Geographic variation in Balsam Fir: 11-year results in the Lake States.

Abstract

Up to 60 provenances of Abies balsamea, aged about 11 years, from 7 US states and 7 Canadian provinces were evaluated in 5 plantations with differing climatic regimes in Wisconsin, Minnesota and Michigan. Measurements of height and the numbers of buds and branches revealed greater vigour in eastern than in western provenances. There was also a marked latitudinal pattern in flushing with northerly provenances being the earliest to flush; large differences were sometimes found over short distances, perhaps related to microclimate. Since the date of flushing is important to frost susceptibility, but is not related to vigour, provenances can be selected for both late flushing and high vigour. The most promising provenances are those from central Lower Michigan, northern Wisconsin and southern New Brunswick.