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Vegetation and soil nutrient properties of Black spruce and Trembling aspen ecosystems in the boreal black and white spruce zone

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Title: Vegetation and soil nutrient properties of Black spruce and Trembling aspen ecosystems in the boreal black and white spruce zone
Author: Klinka, Karel; Kayahara, Gordon J.; Krestov, Pavel; Qian, H.; Chourmouzis, Christine
Subject Keywords Black spruce;Boreal white and black spruce;Forest productivity;Humus form;Site quality;Soil nutrients;Trembling aspen;Understory vegetation
Issue Date: 2001
Publicly Available in cIRcle 2008-04-17
Publisher Forest Sciences Department, University of British Columbia
Series/Report no. Scientia Silvica extension series, 1209-952X, no. 31
Abstract: Changes in forest ecosystem vegetation also bring about changes to the associated soil. In order to maintain forest productivity, it is important to know the effects of tree species upon the soil, especially the influence of deciduous versus coniferous tree species. Many deciduous species increase pH, nitrogen, base saturation and/or accumulation of organic matter in the forest floor. The chemical properties of the forest floor may, in turn, influence the chemical properties of the underlying mineral soil. If a tree species significantly alters the soil, then silviculturists may consider crop rotation between deciduous and coniferous trees or growing mixed-species stands to maintain greater nutrient availability and maintain site productivity. Trembling aspen (Populus tremuloides) and black spruce (Picea mariana) may occupy similar sites in the North American boreal forest. Shade-intolerant aspen is generally a seral species while shade-tolerant black spruce can be a seral species but also forms a major component in late successional stages. This study investigated differences in nitrogen-related soil properties between trembling aspen and black spruce stands on upland sites in the BWBS zone of northeastern BC. We asked two questions: (1) are the differences in soil nutrient properties manifested in both forest floor and mineral soil? (2) To what extent are these differences reflected in the floristic composition of understory vegetation?
Affiliation: Forestry, Faculty ofForest Sciences, Department of
URI: http://hdl.handle.net/2429/717
Peer Review Status: Reviewed

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