Jump to ContentJump to Main Navigation
Alaska's Changing Boreal Forest$
Users without a subscription are not able to see the full content.

F. Stuart Chapin, Mark W. Oswood, Keith Van Cleve, Leslie A. Viereck, and David L. Verbyla

Print publication date: 2006

Print ISBN-13: 9780195154313

Published to Oxford Scholarship Online: November 2020

DOI: 10.1093/oso/9780195154313.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 04 December 2021

Floristic Diversity and Vegetation Distribution in the Alaskan Boreal Forest

Floristic Diversity and Vegetation Distribution in the Alaskan Boreal Forest

Chapter:
(p.81) 6 Floristic Diversity and Vegetation Distribution in the Alaskan Boreal Forest
Source:
Alaska's Changing Boreal Forest
Author(s):

Leslie A. Viereck

Marilyn D. Walker

Publisher:
Oxford University Press
DOI:10.1093/oso/9780195154313.003.0011

Although modern forests have occupied interior Alaska for only 13,000 years, their floristic composition and patterns of distribution have remained relatively stable for the past 5,000 years (Chapter 5). Here, at the current northern limit of forests, severe environmental conditions have prevented migration of new species from the south. The Bering Sea has isolated Alaska from a taxonomically distinct flora in Eurasia. Mountains to the north (Brooks Range) and south (Alaska Range) of interior Alaska have restricted the potential for latitudinal shifts of species in response to millennial-scale variations in climate. The stability of the Alaskan vegetation mosaic for the past 5,000 years contrasts with the substantial vegetation movements that have occurred in the eastern Canadian boreal forest (Bergeron et al. 2004). Because of this long-term stability, the distribution of Alaska’s boreal vegetation reflects a clear imprint of current environmental patterns on the landscape. This strong link between current environment and vegetation facilitates the use of state factors (Chapter 1) as a framework for describing floristic patterns, although barriers to past migration could lead to rapid vegetation change, if new species were to arrive in Alaska. In this chapter we describe the major patterns of diversity and distribution in interior Alaska forests and discuss their potential future changes. The common and scientific names of species mentioned in this chapter are given in Table 6.1. The composition of the boreal forest varies greatly throughout its circumpolar range in response to differences in both current environment and geoclimatic history. The primary species, those that give the forest is distinctive appearance, include broadleafed deciduous trees, needle-leafed evergreens, and needle-leafed deciduous trees. In Alaska, the predominant conifers are white and black spruce (Picea glauca and P. mariana, respectively); larch (Larix laricina) tends to be local; and pine is absent in interior Alaska but a prominent component of the forests to the east in the Yukon and the Northwest Territory, Canada. Important deciduous trees are two poplars (aspen [Populus tremuloides] and balsam poplar [P. balsamifera]) and paper birch (Betula neoalaskana; previously treated as B. papyrifera).

Keywords:   alpine, blackwater streams, diagnostic species, exotic species, floristic classification, grass species, land bridge, net primary production, scientific names

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .