Download the full-sized PDF of Climate and nutrient influences on the growth of white spruce trees in the boreal forests of the YukonDownload the full-sized PDF



Permanent link (DOI):


Export to: EndNote  |  Zotero  |  Mendeley


This file is in the following communities:

Biological Sciences, Department of


This file is in the following collections:

Journal Articles (Biological Sciences)

Climate and nutrient influences on the growth of white spruce trees in the boreal forests of the Yukon Open Access


Author or creator
Boonstra, R.
Desantis, L.
Krebs, C.J.
Hik, D.S.
Additional contributors
Kluane Lake
spruce bark beetle
Picea glauca
nitrogen limitation
tree ring widths
primary productivity
white spruce
climate change
Type of item
Journal Article (Published)
The boreal forests of North America are undergoing major changes because of the direct effects of global warming and increased CO2 levels. Plant production in the boreal forest is nutrient limited, and we examined how long-term fertilization affected growth of white spruce Picea glauca in the face of these major changes. We conducted a large-scale experiment by fertilizing two 1 km2 stands of white spruce in the southwestern Yukon with commercial NPK fertilizer from 1987 to 1994. Tree growth was measured by the width of annual increments in 60 trees from each of 2 control and of 2 matched fertilized 1 km2 sites for the period from 1977 to 1997 in a before, during, and after experimental design. Ring widths increased in both control and fertilized trees over this period as summer temperatures increased. Ring widths in fertilized trees increased from 9 to 48% over control trees during the years in which fertilizer was added, but immediately fell back to control levels from 1995 to 1997 at 1 site as soon as fertilization was stopped. In the long term, nitrogen in these forests may become tied up in shrubs, grasses, herbs, and fungi and not be available to the trees. There are 2 other possible explanations for this lack of sustained tree growth: first, the conversion of nitrogen into a form not readily available to spruce and, second, a spruce bark beetle outbreak that hit the southwestern Yukon during and after 1994 and affected 1 study site much more than the other.
Date created
License information
Copyright Inter-Research 2008 ·
Citation for previous publication
Boonstra R, Desantis L, Krebs CJ, Hik DS (2008) Climate and nutrient influences on the growth of white spruce trees in the boreal forests of the Yukon. Clim Res 36:123-130 doi:10.3354/cr00736
Link to related item

File Details

Date Uploaded
Date Modified
Audit Status
Audits have not yet been run on this file.
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 170931
Last modified: 2015:10:12 20:12:38-06:00
Filename: Climate_Research_36_2008_123.pdf
Original checksum: ef7dc6f4fbd1cfe8aaf5f7fa47bc9b76
Well formed: true
Valid: true
File title: <May be encrypted>
File title: Climate Research 36:123
File author: <May be encrypted>
File author: Inter-Research
Page count: 8
Activity of users you follow
User Activity Date