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Forests 2015, 6(2), 344-359; doi:10.3390/f6020344

Development of Northern White-Cedar Regeneration Following Partial Cutting, with and without Deer Browsing

1
Quebec Ministry of Forests, Parks and Wildlife, Forest Research Branch, Quebec, QC G1P 3W8, Canada
2
Centre for Forest Research, Department of Wood and Forest Sciences, Laval University, Quebec, QC G1V 0A6, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Eric J. Jokela
Received: 11 December 2014 / Revised: 24 December 2014 / Accepted: 22 January 2015 / Published: 2 February 2015
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Abstract

Northern white-cedar (Thuja occidentalis L.) is an important commercial species with a high wildlife value, both as a food source and habitat for many bird and mammal species. Concerns have been expressed about its decreasing abundance across its range, and especially in mixedwood stands, where it has to compete with several other species and can suffer from heavy browsing. In this study, we quantified the development of natural northern white-cedar seedlings and saplings under various partial cutting regimes, with and without white-tailed deer (Odocoileus virgianus Zimmerman) browsing, in three selected sites in Quebec (Canada) and in Maine (USA). Our data show that northern white-cedar regeneration was present in all studied stands, but that only a few stems were taller than 30 cm on the two sites with high densities of deer. In the absence of heavy browsing, stems reached a height of 30 cm in 11 years, and 130 cm in 28 years. Height growth of northern white-cedar regeneration increased with canopy light transmittance, while ground-level diameter increment increased after partial cutting. This suggests that partial cutting can be used in mixedwood stands to release natural northern white-cedar regeneration, but also that the recruitment of northern white-cedar seedlings to larger size classes constitutes a major challenge in stands subject to heavy deer browsing. View Full-Text
Keywords: seedling and sapling growth; white-tailed deer; eastern white cedar; partial cutting; Thuja occidentalis; Odocoileus virginianus seedling and sapling growth; white-tailed deer; eastern white cedar; partial cutting; Thuja occidentalis; Odocoileus virginianus
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Larouche, C.; Ruel, J.-C. Development of Northern White-Cedar Regeneration Following Partial Cutting, with and without Deer Browsing. Forests 2015, 6, 344-359.

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