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Status of Invasive Plants in Alaska

Total number of exotic species reported: 253

Total number of records in EDDMapS: 124737


Invasive Plants by Category

  • Aquatic - 5 species, 7571 records
  • Forbs/Herbs - 178 species, 70333 records
  • Grass or Grasslike - 40 species, 20765 records
  • Hardwood Trees - 9 species, 1443 records
  • Shrub or Subshrub - 12 species, 263 records
  • Vines - 9 species, 148 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. broadleaf plantain - 9699 reports
  2. white clover - 8239 reports
  3. reed canarygrass - 7535 reports
  4. timothy - 5840 reports
  5. annual bluegrass - 5307 reports
  6. alsike clover - 5057 reports
  7. pineapple-weed - 4668 reports
  8. big chickweed - 3863 reports
  9. oxeye daisy - 3813 reports
  10. narrowleaf hawksbeard - 3626 reports

Top Ten Widespread Invasive Plants (by number of positive counties)

  1. common yarrow - 26/27 (96%)
  2. pineapple-weed - 26/27 (96%)
  3. broadleaf plantain - 24/27 (89%)
  4. white clover - 24/27 (89%)
  5. oxeye daisy - 23/27 (85%)
  6. timothy - 23/27 (85%)
  7. annual bluegrass - 23/27 (85%)
  8. shepherd's-purse - 22/27 (81%)
  9. big chickweed - 22/27 (81%)
  10. narrowleaf hawksbeard - 22/27 (81%)

Counties with the most invasive species reported

  1. Anchorage Municipality - 168 species
  2. Kenai Peninsula Borough - 133 species
  3. Matanuska-Susitna Borough - 127 species
  4. Wrangell-Petersburg Census Area - 120 species
  5. Skagway-Hoonah-Angoon Census Area - 119 species
  6. Fairbanks North Star Borough - 114 species
  7. Yukon-Koyukuk Census Area - 114 species
  8. Juneau City and Borough - 111 species
  9. Prince of Wales-Outer Ketchikan Census Area - 107 species
  10. Sitka City and Borough - 106 species

Counties with the least invasive species reported

  1. Wade Hampton Census Area - 12 species
  2. North Slope Borough - 17 species
  3. Northwest Arctic Borough - 24 species
  4. Aleutians East Borough - 27 species
  5. Aleutians West Census Area - 39 species
  6. Bristol Bay Borough - 40 species
  7. Yakutat City and Borough - 40 species
  8. Dillingham Census Area - 43 species
  9. Nome Census Area - 44 species
  10. Lake and Peninsula Borough - 45 species

Report created on September 18, 2014 at 05:45 PM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.