Lyndon B. Johnson National Historical Park Exotic Plants Monitoring Summary—2022
Owen M and Valentine-Darby P. 2023. Lyndon B. Johnson National Historical Park Exotic Plants Monitoring Summary—2022. National Park Service, Southern Plains Inventory and Monitoring Network, Pecos, New Mexico.
Each year, the Southern Plains Inventory & Monitoring Network (SOPN) monitors pathways of exotic plant introduction at Lyndon B. Johnson National Historical Park (NHP) (LYJO) and other network parks. The areas sampled are typically linear transects along roads, trails, boundary lines, and stream channels that are at high risk for exotic plant invasion and infestation. Transects are sampled on a three-year rotation. In select years, exotic plant data are also collected at predetermined grid points spaced 100 meters (m) apart, at three regions within the park (along the Pedernales River and north of the airstrip at the Ranch Unit and covering the majority of the Johnson City Unit). Grid-point surveys are done to determine the extent and distribution of exotic plants within the park interior landscape. The Southern Plains Network surveys for a short list of species that is customized to each park. Our intent is to document infestations for which we recommend treatment, and to monitor species of high concern. The monitoring list for LYJO was drawn from the park’s Natural Resource Condition Assessment (NRCA), completed by Struthers et al. (2016). In the NRCA, exotic plants found in 2012–2014 LYJO surveys were ranked across a series of factors, following a system designed by Hiebert and Stubbendieck (1993).
- Type
- Resource Brief
- Authors
- Owen, Merran; Valentine-Darby, P.
- Date of Issue
- 2023-02
- Publisher
- National Park Service, Southern Plains Inventory and Monitoring Network, Pecos, New Mexico.
- Units
- LYJO , SOPN
- Keywords
- Exotic Plant Brief, Exotic Plant Monitor, exotic plant monitoring, Exotic plants, monitoring
- Subjects
- Ecological Framework: Biological Integrity | Invasive Species | Invasive/Exotic plants