Canadian Breeding Bird Census Plots

The Canadian Breeding Bird Census (BBC) Database contains data for 928 breeding bird plot censuses representing all known censuses of breeding birds carried out in Canada during the period 1929–1993. The 928 records in the database represent 640 unique census plots located in all provinces and territories, except Prince Edward Island. The BBC, which was replaced by the current Breeding Bird Survey, is one of the longest-running surveys of bird populations in North America, and was designed to help determine abundance and distribution patterns of bird species. An important feature of the BBC Database is the habitat data associated with each census plot. The most prevalent vegetation species in different layers (canopy, shrub and ground cover) were recorded to reflect the assumption that birds respond principally to vegetative structure.

加拿大繁殖鸟类普查（Breeding Bird Census, BBC）数据库收录了928次繁殖鸟类样地普查的相关数据，涵盖1929年至1993年间加拿大境内已开展的全部已知繁殖鸟类普查工作。该数据库内的928条记录对应640个独特的普查样地，分布于加拿大除爱德华王子岛外的所有省份与地区。该普查（BBC）已被现行的繁殖鸟类调查（Breeding Bird Survey）所取代，是北美历史最悠久的鸟类种群调查项目之一，其设计初衷为明确鸟类物种的种群丰度与分布格局。该BBC数据库的一项重要特征是，每个普查样地均配有对应的生境数据。研究人员记录了各植被层（林冠层、灌丛层与地表覆盖层）中的优势植物物种，以契合“鸟类主要响应植被结构”这一研究假设。