Forest Investment Account

Abstract of FII Project R04-069

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Ectomycorrhizae and networks: their role in facilitating Douglas-fir regeneration under water, site and climatic stresses

Author(s): Simard, Suzanne (University of British Columbia)
Subject: Biology, Climate, Ecology, Forestry, Physiology, Silviculture/Forest Management Systems
Series: Forest Investment Account (FIA) - Forest Science Program


Regeneration of Douglas-fir is often poor in the interior Dry-belt. This may be due to poor nutrient and water uptake, processes that are heavily influenced by ectomycorrhizae. The aim of this project is to investigate the role of ectomycorrhizae in Douglas-fir regeneration by examining (i) silvicultural practices that influence how rapidly Douglas-fir becomes colonized in the field, (ii) how ectomycorrhizae influence belowground interactions with neighbouring trees, and (iii) whether colonization by different ectomycorrhizal fungi increase the ability of Douglas-fir to regenerate sites with low soil water availability. Because many ectomycorrhizal fungi colonize regenerating seedlings from mycelium already connected to other trees, the importance and function of these mycelial networks will be a major focus of this project. The research will be conducted by a group of internationally respected scientists and their graduate students. The work will be effective and efficient because there are substantial cash and in-kind contributions from other sources.

For further information, please contact Suzanne Simard, University of British Columbia (

Updated September 08, 2005 

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