Tree Characteristics - Spears and Didion Ranches [ds320]

These data are the characteristics of the individual live trees found in 0.05-ha circular plot habitat samples taken in 2005 at sample points at Spears and Didion Ranches, Placer County, California. There were three 0.05-ha circular habitat sampling plots at each of the 15 sample points. To be counted, trees had to be > 4" dbh and within the 12.6 m radius plot. If a plot number is missing, then there were no trees at the sample points and vegetation plots.本数据集收录了2005年于美国加利福尼亚州普莱瑟县斯皮尔斯牧场与迪迪恩牧场的采样点所采集的0.05公顷圆形样地生境样本中的活立木个体特征数据。每个采样点共设置3块0.05公顷圆形生境采样样地。仅当树木胸径（DBH，Diameter at Breast Height）大于4英寸且处于半径12.6米的样地范围内时，方可被纳入统计。若某样地编号缺失，则表明该采样点及植被样地内无树木分布。