Villemaire-CoteRuelSirois2017

Référence

Villemaire-Côté, O., Ruel, J.-C. and Sirois, L. (2017) Development of Northern White-Cedar (Thuja occidentalis L.) Plantations within and outside Deer Yards. Forests, 8(9):326. (URL )

Résumé

Regional surveys done over the last decades show a clear decline in abundance of Northern white-cedar (Thuja occidentalis L.) throughout its range. A lack of seed trees, difficulties in the establishment of natural regeneration and high browsing pressure caused by increasing deer populations have been identified as plausible causes. Current silvicultural strategies for cedar restoration recommend partial cutting to promote and release natural regeneration, but there is also a need to restore the species in areas where it became absent. Yet, little attention has been given to cedar plantations. This study provides a first characterisation of the effects of competition, silvicultural treatments and deer, moose and hare browsing on planted cedar growth, survival, and stem form. Pure and mixed cedar plantations aged 5–27 years located in Eastern Québec were sampled. Both inside and outside deer yards, planted cedars showed high survival rates and were generally subject to low browsing pressure, but 45% were forked. Cedars showed high growth rates and strong reaction to stand opening. Results suggest that at reduced competition levels, a 9-year browser exclusion could be sufficient to establish safe-from-browsing cedar stands of >3 m in height.

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@ARTICLE { Villemaire-CoteRuelSirois2017,
    AUTHOR = { Villemaire-Côté, O. and Ruel, J.-C. and Sirois, L. },
    TITLE = { Development of Northern White-Cedar (Thuja occidentalis L.) Plantations within and outside Deer Yards. },
    JOURNAL = { Forests },
    YEAR = { 2017 },
    VOLUME = { 8 },
    PAGES = { 326 },
    NUMBER = { 9 },
    ABSTRACT = { Regional surveys done over the last decades show a clear decline in abundance of Northern white-cedar (Thuja occidentalis L.) throughout its range. A lack of seed trees, difficulties in the establishment of natural regeneration and high browsing pressure caused by increasing deer populations have been identified as plausible causes. Current silvicultural strategies for cedar restoration recommend partial cutting to promote and release natural regeneration, but there is also a need to restore the species in areas where it became absent. Yet, little attention has been given to cedar plantations. This study provides a first characterisation of the effects of competition, silvicultural treatments and deer, moose and hare browsing on planted cedar growth, survival, and stem form. Pure and mixed cedar plantations aged 5–27 years located in Eastern Québec were sampled. Both inside and outside deer yards, planted cedars showed high survival rates and were generally subject to low browsing pressure, but 45% were forked. Cedars showed high growth rates and strong reaction to stand opening. Results suggest that at reduced competition levels, a 9-year browser exclusion could be sufficient to establish safe-from-browsing cedar stands of >3 m in height. },
    DOI = { 10.3390/f8090326 },
    OWNER = { nafon9 },
    TIMESTAMP = { 2017.10.12 },
    URL = { http://www.mdpi.com/1999-4907/8/9/326 },
}

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