Monitoring native plant diversity in managed stands is currently used by CanFor within the Prince George Timber Supply Area (PGTSA) as an indicator of Sustainable Forest Management (SFM) and subsequently used to satisfy requirements of other SFM initiatives. There have been several technical reports produced in the past five years related to the plant diversity index project, which should be reviewed for a complete background into the original development and evolution of this indicator (Bernier et al. 2001; Timberline 2004a, b; 2003a, b, c; 2002). As part of the ongoing TSA-wide SFM planning, there is a need to update and expand this indicator to include managed stands throughout the TSA and not restricted to CanFor's operating areas. The main principle behind the plant diversity index projects is that an ecosystem subjected to stresses may be less diverse, as measured by a mathematically derived diversity index (Krebs, 1994; Meffe and Carroll, 1994). By employing diversity indices in measuring vegetation composition of a particular stand, forest managers are able to objectively monitor the effects of various management practices such as herbicide use, thinning, season of harvest, etc. on ecosystem health. To establish the natural range of variability for plant diversity changes over successional time, vegetation species and percent cover data is required for stands regenerating after a natural, stand-initiating event. This data provides the ecological benchmarks for comparison with plant diversity of managed stands throughout the PGTSA.
Timberline Forest Inventory Consultants Ltd.
Timberline Forest Inventory Consultants Ltd.. 2006. Prince George Timber Supply Area native plant diversity: benchmark establishment and monitoring. Forest Investment Account (FIA) - Land Base Investment Program - Innovative. Forest Investment Account Report