Canadian Forest Service Publications

Assessing temporal response to biomass removal: A framework for investigating evolving constraints on boreal stand development. Fleming, R.L., Morris, D.M., Hazlett, P.W., Forest Ecology and Management 497 (2021) 119518

Year: 2021

Issued by: Great Lakes Forestry Centre

Catalog ID: 40477

Language: English

Series: Internal Report (GLFC - Sault Ste. Marie)

Availability: PDF (download)

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Plain Language Summary

Impacts of harvest intensity and soil disturbance on site productivity are likely to vary with stand development stage and interactive processes related to ecosystem function. On upland boreal sites, stand productivity may initially be constrained by microclimatic conditions. However, increasing nutrient demands and over story light interception associated with canopy development may place progressively greater emphasis on nutrient availability, profile water storage capacity and asymmetric competition. We illustrate these effects using 20-yr post-harvest data from fourteen jack pine (Pinus banksiana Lamb.) and black spruce (Picea mariana (Mill.) BSP) Long-term Soil Productivity (LTSP) installations in northern Ontario. Initial growth and ten-year survival were as great or greater without forest floors (NFF), but by year, 15 dominant height increments were usually greater with intact forest floors (FF). Growing season frost occurrence and high vapor pressure deficits occurred more frequently with FF than NFF treatments during the initial stand establishment phase. Similarly, mean growing season soil temperatures were 2-5˚C warmer with NFF during this phase, with stand Leaf Area Index (LAI) values