A Four-year Summary of Breeding Bird Surveys in TFL 48 ... - BIOD

Newton 1998; Robbins 1978). The analysis of several transects may provideinformation about changes that occur at larger scales, or may be used comparatively todemonstrate regional variation in species' distributions and abundance.The latest large-scale report on BBS in North America spanned the period 1965to 1979 (Robbins et al. 1986). In that report, the whole of North America was assessed,with broad generalizations about major physiographic regions. Predictions of speciesrichness, abundance, and diversity were thus extrapolated for TFL 48, even though nospecific data for most of the region was available. More current assessments of theseindices are available on the World Wide Web, but estimates are typically derived from“easy-driving roads” rather than industry-based forestry roads. Consequently, managedforests are severely under-represented.The purpose of this report is to provide a summary of bird species richness,abundance and diversity for each transect, as well as for each major region (i.e., TFL 48and Fort St. John TSA), and to make recommendations for future research as it appliesto the management and mitigation of birds in a large managed forest landscape. Trendinformation is provided for some species, but should be considered inadequate fordrawing broad conclusions about the direction of species' populations. Instead, thetrends provide a visual estimate of annual variation for the Peace River District.Identification of COSEWIC (Committee on the Status of Endangered Wildlife in Canada,2002) or BCMoE (British Columbia Ministry of Environment) listed species, habitatrepresentation, and other findings considered important to species-habitat relationshipsare discussed. Related publications that provide modelled estimates of species-habitat2