NDLI: Development of black spruce growth forms at treeline

Content Provider	Springer Nature Link
Author	Pereg, Daria Payette, Serge
Copyright Year	1998
Abstract	Most treeline populations in northeastern Canada are monospecific stands of black spruce (Picea mariana [Mill.] B.S.P.), a hardy, cold-tolerant species able to withstand harsh climatic conditions under different growth forms. In the forest tundra, black spruce thrives in protected areas and exhibits a normal arborescent growth form, but in exposed sites, upright stems are damaged above the snowpack by snow abrasion and wind. In this study, the development of damaged growth forms was examined in a moderately exposed habitat. Five developmental stages were identified and described using detailed stem analysis of 13 spruce trees. Four different types of damaged growth forms were identified according to variations in supra-nival (above snow) stem height and number. At the site scale, the age structure of supra-nival shoots, based on a larger sample of 256 stems, was unimodal, suggesting a synchronous development of the spruce stand in which 46% of the shoots were initiated during the 1960s and 1970s. Subfossil trunks on the ground were all depressed trees, indicating that the former vegetation was a krummholz, not a forest. This indicates the recent development of the small-tree stand above the snowpack, probably triggered by recent milder conditions associated with snowier winters in the last decades.
Starting Page	137
Ending Page	147
Page Count	11
File Format	PDF
ISSN	13850237
Journal	Plant Ecology
Volume Number	138
Issue Number	2
e-ISSN	15735052
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1998-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Plant Science

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