| Beltrami Aquatic Invasive Species Task Force | |||||||||||||||
| Relative Risk Assessment Matrix (Preliminary Draft) | |||||||||||||||
| Damage potential | Difficulty of | Sum | Risk Rank | ||||||||||||
| Hyperlinked version available on-line at WaterBlog: beltramiswcd.blogspot.com See also www.seagrant.umn.edu/ais/ | Fisheries | Water Quality | Economic | Ecological | Detection | Prevention | Containment | Eradication | Pervasiveness | Rate of Spread | Proximity Factor | First noted | Notes | ||
| Animals | |||||||||||||||
| Bighead/Silver carp | 4 | 4 | 3 | 4 | 3 | 4 | 5 | 6 | 2 | 3 | 3 | 41 | 21 | ~1970 | |
| Chinese mystery snail | 2 | 2 | 4 | 3 | 2 | 6 | 6 | 8 | 8 | 6 | 10 | 57 | 15 | 1931 | PRESENT Widespread |
| Common carp | 5 | 7 | 6 | 7 | 3 | 4 | 6 | 8 | 7 | 5 | 7 | 65 | 8 | 1879 | |
| Grass carp | 4 | 6 | 4 | 7 | 2 | 6 | 5 | 6 | 2 | 3 | 3 | 48 | 17 | ~1960 | |
| New Zealand mud snail | 5 | 5 | 5 | 5 | 6 | 6 | 7 | 8 | 3 | 5 | 5 | 60 | 13 | 1991 | Asexual, very high density |
| Round goby | 7 | 5 | 5 | 7 | 5 | 4 | 7 | 8 | 3 | 3 | 4 | 58 | 14 | 1990 | |
| Ruffe | 7 | 5 | 5 | 5 | 7 | 6 | 8 | 8 | 6 | 5 | 4 | 66 | 7 | 1986 | |
| Rusty crayfish | 7 | 5 | 8 | 8 | 4 | 5 | 6 | 8 | 6 | 6 | 10 | 73 | 2 | -- | PRESENT eat fish eggs, destroy vegetation |
| Sea lamprey | 6 | 2 | 6 | 5 | 3 | 3 | 3 | 5 | 4 | 3 | 4 | 44 | 19 | -- | |
| Spiny waterflea | 7 | 4 | 8 | 9 | 7 | 7 | 9 | 9 | 6 | 8 | 6 | 80 | 1 | 1982 | Cook, St. Louis, Lake of the Woods |
| White perch | 5 | 3 | 4 | 4 | 4 | 4 | 5 | 8 | 3 | 3 | 3 | 46 | 18 | 1950 | |
| Zebra mussel | 5 | 4 | 6 | 8 | 6 | 6 | 7 | 8 | 6 | 5 | 6 | 67 | 6 | 1988 | Crow Wing, Mille Lacs |
| Plants | |||||||||||||||
| Curly-leaf pondweed | 3 | 8 | 7 | 6 | 4 | 4 | 7 | 8 | 4 | 5 | 9 | 65 | 8 | 1879 | Present? Hubbard (early growth, mats, & senesence) |
| Eurasian milfoil | 3 | 5 | 8 | 6 | 4 | 5 | 8 | 8 | 8 | 6 | 8 | 69 | 4 | 1952 | Cass, Itasca |
| Flowering rush | 3 | 3 | 4 | 5 | 4 | 3 | 4 | 5 | 3 | 7 | 8 | 49 | 16 | 1905 | Itasca County |
| Purple loosestrife | 4 | 5 | 5 | 6 | 3 | 5 | 6 | 7 | 8 | 6 | 10 | 65 | 8 | 1869 | PRESENT: Wetland competitor |
| Reed canary grass | 2 | 3 | 3 | 6 | 2 | 4 | 5 | 6 | 5 | 6 | 2 | 44 | 19 | ~1850 | |
| Yellow iris | 2 | 3 | 3 | 4 | 2 | 3 | 4 | 4 | 3 | 4 | 2 | 34 | 22 | 1886 | |
| Other | |||||||||||||||
| Bacterial kidney disease | 6 | 4 | 6 | 6 | 7 | 5 | 7 | 7 | 6 | 6 | 4 | 64 | 11 | 1975 | Devastating for trout and other salmonids (cisco?) |
| Heterosporis | 7 | 5 | 6 | 5 | 5 | 5 | 7 | 7 | 6 | 8 | 10 | 71 | 3 | 2002 | PRESENT In Lake Bemidji (Cloutman), Cass Chain |
| VHS Novirhabdovirus | 8 | 4 | 7 | 6 | 8 | 7 | 8 | 9 | 3 | 6 | 2 | 68 | 5 | 2005 | Low probability but high impact (20-80% mortality) |
| Ranavirus (LM Bass) | 6 | 4 | 4 | 5 | 7 | 7 | 8 | 9 | 5 | 5 | 2 | 62 | 12 | 2002 | |
| Each species ranked for each item on a 1-10 scale with 1 being minimal risk and 10 being extreme risk | |||||||||||||||
| Note numerous algae and microinvertebrates not listed | |||||||||||||||
| Proximity factors add 10 for already present, 8 for adjacent county, 6 for inland Minnesota, 4 for Lake Superior, 2 for Great Lakes | |||||||||||||||