Data for: Viability of multiple populations across the range of a species at risk: the case of Pitcher's Thistle, Cirsium pitcheri, in Canada

Three populations at Pukaskwa National Park (Ontario, Canada) were surveyed annually between 1982 and 2015, and an additional 33 populations on Lake Huron were monitored annually between 2000 and 2017, with methods standardized in 2004. Monitoring at each location consisted in recording the total number of plants by life stage (i.e., seedling, rosette, or mature/flowering). The data here are for number of rosettes only. One sheet contains the survey data for each population, another sheet contains information on the population locations and the area surveyed in each.1982年至2015年间，研究人员对加拿大安大略省普卡斯夸国家公园（Pukaskwa National Park）内的3个植物种群开展了年度调查；2000年至2017年间，同步对休伦湖（Lake Huron）沿岸的33个额外种群进行年度监测，并于2004年统一了所有监测方法。各监测点位的监测流程为按植物生活史阶段（即幼苗（seedling）、莲座丛（rosette）、成熟/开花植株）记录总个体数。本数据集仅包含莲座丛阶段的植株数量数据。数据集包含两个工作表：其一存储各目标种群的调查数据，其二则记录各监测种群的点位信息与对应的调查范围。