Plant Ecology

, Volume 216, Issue 1, pp 157–164 | Cite as

Does fire regime influence life history traits of jack pine in the southern boreal forest of Québec, Canada?

  • Christopher H. Briand
  • Dylan W. Schwilk
  • Sylvie Gauthier
  • Yves Bergeron
Article

Abstract

In the southern boreal forest of Québec, jack pine (Pinus banksiana Lamb.) stands occur in two habitat units, mainland and island. These two habitats have historically experienced different fire regimes. Infrequent lethal fires characterize the mainland, while frequent non-lethal and infrequent lethal fires characterize the islands. Previous studies have shown that highly serotinous jack pine trees tend to dominate on the mainland, while intermediate and non-serotinous trees are more abundant on the islands. A comparison of morphological characters describing tree form, cone morphology and reproductive output was made on 14 mainland and 10 island stands in an effort to determine if they exhibited variation consistent with variation in fire regime and serotiny. Generally, mean values of the morphological and reproductive characters measured did not vary between the two habitats, nor did bark allometry. Live crown height to tree height ratio, as a function of tree age, and cone number as a function of tree height varied between the habitats. Relatively old mainland trees had a shorter crown in relation to tree height than their island counterparts. Cone number increased faster with tree height for island versus mainland trees. Island trees exhibited earlier reproduction than did mainland trees: in the island habitat the percentage of cone bearing trees (55 %) in the youngest age class (<21 years) was significantly greater than in the mainland habitat (34 %). Mainland populations were fire-resilient with a high degree of serotiny. Island populations behave like fire-resistant/fire-surviving species with a low degree of serotiny and earlier reproductive investment.

Keywords

Boreal forest Fire Jack pine Pinus banksiana Québec Serotiny 

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Christopher H. Briand
    • 1
  • Dylan W. Schwilk
    • 2
  • Sylvie Gauthier
    • 3
  • Yves Bergeron
    • 4
  1. 1.Department of Biological SciencesSalisbury UniversitySalisburyUSA
  2. 2.Department of Biological SciencesTexas Tech UniversityLubbockUSA
  3. 3.Natural Resources CanadaCanadian Forest Service, Laurentian Forestry CenterSainte-FoyCanada
  4. 4.Chaire Industrielle en Aménagement Forestier Durable (NSERC-UQAT-UQAM)Université du Québec en Abitibi-TémiscamingueRouyn-NorandaCanada

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