Density of caterpillars and percentage of caterpillars that were parasitized

The density of caterpillars was estimated each March from 1987 to 2013 on 10 lupine bushes (cats/lup) and in 5 transects dominated by poison hemlock (cats/hem). SE refers to the standard error of each estimate. The time series in this data file extends that used in the paper.

1987年至2013年每年3月，研究人员对10株羽扇豆灌丛（lupine bushes，记录单位：cats/lup）以及5个以毒芹（poison hemlock）为优势种的样带（transects，记录单位：cats/hem）开展毛虫密度估算。SE代表各估计值的标准误（standard error）。本数据文件中的时间序列较该论文中所使用的时间序列更长。