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Enhancing Mixedwoods Landscapes for Sustainability and Aesthetics

Explore the vital role of mixedwoods in landscape diversity, forest health, and economic prosperity. Learn how nurse crops, nutrient cycling, and light transmittance impact ecosystem resilience and productivity. Discover effective stand tending practices to optimize mixedwood forest yields and visual appeal.

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Enhancing Mixedwoods Landscapes for Sustainability and Aesthetics

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  1. Mixedwoods – A discussion Smith et al 1997 Chapter 16 Comeau 1996 Man and Lieffers 1999

  2. Why mixedwoods? • 1)      Mixedwoods are a natural part of the landscape • 2)      Visual resource – aesthetic (they look nice) • 3)      Diversity • 4)      Forest Health and risk of loss • 5)      Nurse Crop • a.      Reducing vigor of grasses, herbs and shrubs • b.      Carbon transfer between roots that share the same mycorrhizae • c.      Frost protection • 6)      Nutrient availability and cycling • 7)      Yield • 8)      Economics

  3. SVF and Transmittance vs opening diameter (in tree lengths), where trans in undisturbed stand is 20%

  4. “Successional falldown” • Reduction in conifer volume resulting from increased abundance of pioneer deciduous tree species following harvesting • Stand tending practices (site preparation, vegetation management, spacing, cleaning) can reduce this “falldown”

  5. Light (transmittance) levels decline as birch basal area increases (Comeau 1996)ln(t)=-0.2122 x ban=110, R2=0.759, RMSE=0.804

  6. Light (transmittance) levels decline as aspen basal area increasesln(t)=-0.06727 x ban=68 R2=0.917 RMSE=0.453(Comeau (in press))

  7. Vertical gradient of light under aspendifn=0.4502 + 0.7481 x relht +0.5070 x (relht)2 – 0.7058 x (relht)3(n=48 R2=0.858 RMSE=0.1143)Comeau (in press)

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