; and (B) are environmentally adapted to and likely to become established and persist in that planting area. (5) National Park Service region The term National Park Service region means each of the following unified Interior regions designated by the Secretary of the Interior: (A) Alaska. (B) Arkansas-Rio Grande-Texas-Gulf. (C) Columbia-Pacific Northwest. (D) California-Great Basin. (E) Great Lakes. (F) Lower Colorado-Basin. (G) Mississippi-Basin. (H) Missouri-Basin. (I) North Atlantic-Appalachian. (J) Pacific Islands. (K) South Atlantic-Gulf. (L) Upper Colorado-Basin. (6) Native plant species The term native plant species means, with respect to a particular ecosystem, a species that, other than as a result of an introduction, historically occurred or currently occurs in that ecosystem. (7) Nonnative or alien The term nonnative or alien means, with respect to a particular ecosystem, an organism, including the seeds, eggs, spores, or other biological material of the organism capable of propagating that species, that occurs outside of the natural range of the organism. (8) Plant material The term plant material means a plant or the seeds, eggs, spores, or other biological material of a plant capable of propagating the species of the plant. (9) Secretary The term Secretary means the Secretary of the Interior, acting through the Director of the National Park Service. 4. Pilot program for native plant species (a) Establishment Not later than 180 days after the date of enactment of this Act, the Secretary shall establish a pilot program in 2 or more National Park Service regions to promote the use of native plant materials. (b) Implementation In carrying out land management activities on Federal land under the jurisdiction of the Secretary, including maintenance and restoration in response to degradation caused by human activity or natural events (such as fire, flood, or infestation), the Secretary shall— (1) to the extent practicable, give preference to the use of locally adapted native plant materials