Non-Native Plant Species Invasiveness Assessments
A system/protocol designed to assess the invasive nature of non-native plant species was developed by The Nature Conservancy (TNC) in New York and the Brooklyn Botanic Garden (BBG) in 2008, under the auspices of LIISMA (Long Island Invasive Species Management Area). The ranking system is designed to be repeatable, based on the best available science, clearly explained and fully documented. The system can be used to assess non-native plant species that are established in NYS, and also species that are new arrivals or are not yet present.
Completed NYS assessments and a full explanation of the process can be found on the NYIS.INFO Resources menu.
In order to better inform local efforts, species can be further assessed using the Partnership for Regional Invasive Species Management (PRISM) form. Completed assessments specific to Long Island can be found below.