Live plant imports: the major pathway for forest insect and pathogen invasions of the US

Data provided here correspond to that of Figure 1 in Liebhold et al. 2012. Live plant imports: the major pathway for forest insect and pathogen invasions of the US. Front Ecol Environ 10(3): 135-143. doi: 10.1890/110198.

All live plants intended for retail and propagative use were used. In addition to including plants with roots, the commodity category--also referred to as "plants for planting" or "nursery stock"--encompasses bulbs, roots, and unrooted cuttings, but excludes cut flowers, ornamental foliage, and seed.

本数据集所用数据对应Liebhold等（2012）发表论文中的图1。该论文题为《活体植物进口：美国森林昆虫与病原生物入侵的主要途径》，刊载于《Front Ecol Environ》10卷第3期，页码范围135-143，DOI为10.1890/110198。

本数据集纳入所有用于零售及繁殖用途的活体植物。该商品类别亦可称作“种植用植物”或“苗木（nursery stock）”，除包含带根植物外，还涵盖球茎、根系及无根插穗，但排除切花、观赏叶材与种子。