Phragmites (Phragmites australis)
Phragmites, or common reed, is a tall perennial grass found in wetlands and along shorelines. While a native subspecies exists, the invasive European genotype is more aggressive and widespread. It was likely introduced through ballast water and has become one of the most problematic wetland invaders in the northeastern United States.
Invasive phragmites grow in dense stands, sometimes reaching over 10 feet tall. Their extensive root systems allow them to rapidly outcompete native wetland vegetation and form monocultures that reduce habitat quality for wildlife. Phragmites stands block sunlight, slow water movement, and trap sediment, which can alter hydrology and wetland function. In dry seasons, their thick stalks can also pose a fire risk. Once established, phragmites are extremely difficult to remove, requiring coordinated mechanical and chemical control efforts over multiple years.
In the Chazy Lake watershed, patches of phragmites have been found in roadside ditches and along lower-elevation wetlands, particularly in areas disturbed by human activity. CLWI is working with the Adirondack Park Invasive Plant Program (APIPP) to document the extent of phragmites and develop targeted removal strategies. Early detection and rapid response are key, as small infestations are far easier to manage than mature stands.
Invasive phragmites grow in dense stands, sometimes reaching over 10 feet tall. Their extensive root systems allow them to rapidly outcompete native wetland vegetation and form monocultures that reduce habitat quality for wildlife. Phragmites stands block sunlight, slow water movement, and trap sediment, which can alter hydrology and wetland function. In dry seasons, their thick stalks can also pose a fire risk. Once established, phragmites are extremely difficult to remove, requiring coordinated mechanical and chemical control efforts over multiple years.
In the Chazy Lake watershed, patches of phragmites have been found in roadside ditches and along lower-elevation wetlands, particularly in areas disturbed by human activity. CLWI is working with the Adirondack Park Invasive Plant Program (APIPP) to document the extent of phragmites and develop targeted removal strategies. Early detection and rapid response are key, as small infestations are far easier to manage than mature stands.