Reparian Invaders

Russian Olive
Although not declared a noxious weed in Nebraska it is on the states watch list. Russian Olive can outcompete native vegetation, interfere with natural plant succession and nutrient cycling, and tax water reserves. Because Russian Olive is capable of fixing nitrogen in its roots, it can grow on bare, mineral substrates and dominate riparian vegetation where overstory cottonwoods have died.
Yellow Flag Iris
Yellow flag iris can produce many seeds that can float from the parent plant or plants can spread vegetatively via rhizome fragments. Once established it forms dense clumps or floating mats that can alter wildlife habitat and species diversity. All parts of this plant are poisonous, which results in lowered wildlife food sources in areas where it dominates. This species has the ability to escape water gardens and ponds and grow in undisturbed and natural environments. Dense areas of this plant may alter hydrology by trapping sediment.