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Status of Invasive Plants in Alaska

Total number of exotic species reported: 259

Total number of records in EDDMapS: 130074


Invasive Plants by Category

  • Aquatic - 5 species, 7761 records
  • Forbs/Herbs - 182 species, 73034 records
  • Grass or Grasslike - 40 species, 21115 records
  • Hardwood Trees - 9 species, 1443 records
  • Shrub or Subshrub - 13 species, 270 records
  • Vines - 9 species, 150 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. broadleaf plantain - 10030 reports
  2. white clover - 8314 reports
  3. reed canarygrass - 7728 reports
  4. timothy - 5845 reports
  5. annual bluegrass - 5639 reports
  6. alsike clover - 5102 reports
  7. pineapple-weed - 4839 reports
  8. narrowleaf hawksbeard - 3993 reports
  9. big chickweed - 3884 reports
  10. oxeye daisy - 3883 reports

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

  1. pineapple-weed - 29/27 (107%)
  2. broadleaf plantain - 29/27 (107%)
  3. oxeye daisy - 28/27 (104%)
  4. white clover - 28/27 (104%)
  5. big chickweed - 27/27 (100%)
  6. timothy - 27/27 (100%)
  7. annual bluegrass - 27/27 (100%)
  8. common yarrow - 26/27 (96%)
  9. red sorrel - 26/27 (96%)
  10. common chickweed - 26/27 (96%)

Counties with the most invasive species reported

  1. Anchorage Municipality - 169 species
  2. Kenai Peninsula Borough - 135 species
  3. Matanuska-Susitna Borough - 129 species
  4. Fairbanks North Star Borough - 114 species
  5. Yukon-Koyukuk Census Area - 114 species
  6. Juneau City and Borough - 112 species
  7. Sitka City and Borough - 105 species
  8. Valdez-Cordova Census Area - 103 species
  9. Ketchikan Gateway Borough - 92 species
  10. Haines Borough - 85 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. Prince of Wales-Outer Ketchikan Census Area - 38 species
  6. Aleutians West Census Area - 39 species
  7. Yakutat City and Borough - 41 species
  8. Bristol Bay Borough - 42 species
  9. Dillingham Census Area - 43 species
  10. Nome Census Area - 44 species

Report created on October 31, 2014 at 02:50 AM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.