Spatial patterns of discovery points and invasion hotspots of non-native forest pests

<p>The locations of first detection and county-level occurrence for 101 major non-native pests (<i>n</i> = 84 insects, 17 pathogens) of trees were compiled for the contiguous USA. Data were originally collected for the Alien Forest Pest Explorer database.<sup>1</sup> Briefly, locations (latitude, longitude) of discovery and occurrence at the county-level were compiled from primary literature articles, surveys, and federal and state government reports. For each pest, we obtained the year of first discovery, global region of origin or simply “origin” (Asian Palearctic, Australasia, European plus Asian Palearctic, European Palearctic, or Neotropic Mexico/Central/South America; based on a pest’s native range), and guild (bark/wood-borer, foliage-feeder, sap-feeder, pathogen).</p>

<p>1. USDA Forest Service (2018). Alien Forest Pest Explorer (AFPE). USDA Forest Service. <a href="https://data.nal.usda.gov/dataset/alien-forest-pest-explorer-afpe">https://data.nal.usda.gov/dataset/alien-forest-pest-explorer-afpe</a></p>

本数据集整合了美国本土48州区域（contiguous USA）内101种主要林木非本土有害生物（其中昆虫84种、病原物17种）的首次发现点位与县级发生范围。本数据最初为构建外来森林有害生物探索者（Alien Forest Pest Explorer, AFPE）数据库而采集¹。简言之，县级尺度的发现与发生点位（经纬度）均从原始文献、实地调查以及联邦与州政府报告中整合获取。本研究还针对每种有害生物，获取了其首次发现年份、全球起源区域（简称为“起源地”，分为亚洲古北区（Asian Palearctic）、澳大拉西亚（Australasia）、欧洲加亚洲古北区（European plus Asian Palearctic）、欧洲古北区（European Palearctic），以及新热带区墨西哥/中美洲/南美洲（Neotropic Mexico/Central/South America），划分依据为有害生物的原生分布范围）以及取食功能群（包括树皮/木材蛀食类、叶部取食类、汁液取食类、病原物类）。

1. 美国农业部林务局（USDA Forest Service）. 2018. 外来森林有害生物探索者（Alien Forest Pest Explorer, AFPE）[EB/OL]. 美国农业部林务局. https://data.nal.usda.gov/dataset/alien-forest-pest-explorer-afpe