Rare, Threatened and Endangered Plant Species Inventory at Antietam National Battlefield
Beauchamp VB and Obermaier J. Rare, Threatened and Endangered Plant Species Inventory at Antietam National Battlefield. 2024-2025. National Park Service
Antietam National Battlefield (ANTI), established in 1890, preserves the cultural and natural resources tied to the 1862 Battle of Antietam. In addition to protecting historic farmsteads, monuments, and the battlefield landscape, ANTI is increasingly recognized as an important refuge for native vegetation, rare plant species, and water resources in a region experiencing ongoing development. Guided by its 2021 Cultural Landscape Report, the park has launched new management strategies focused on watershed protection, grassland, and forest block restoration. Because these restoration efforts may affect rare, threatened, and endangered (RT&E) species, ANTI conducted a comprehensive inventory of RT&E plants across five key forest tracts—Snavely, Roulette, Union Advance, West, and Sherrick Woods—covering 172 acres. Surveys between June 2024 and June 2025 recorded 317 occurrences of 17 RT&E target species, including two species new to the park. The study found that RT&E species are disproportionately associated with historically forested areas (78% of occurrences fell within 1936 forest boundaries), steep slopes, Opequon-Rock outcrop soils, and Ridge and Valley Limestone Oak-Hickory Forest communities. Results highlight the lasting influence of historical land use, geology, and limited dispersal ability on present-day species distributions. Many RT&E species remain confined to limestone outcrops and steep slopes that escaped agricultural clearing, while secondary forests on former farmland often lack suitable conditions for recolonization. Dispersal limitations, competition with invasive plants, deer herbivory, and site-specific factors such as dense pawpaw thickets further constrain population expansion. Management recommendations include prioritizing protection of calcareous forest habitats, maintaining continuity of historically forested areas, mitigating invasive species, and addressing deer impacts. These findings will inform future restoration planning, deer management, trail siting, and long-term monitoring to safeguard ANTI’s most sensitive plant populations while achieving broader habitat restoration goals.
- Type
- Project
- Authors
- Beauchamp, Vanessa; Obermaier, Jonathan
- Publisher
- National Park Service
- Units
- ANTI
- Keywords
- Antietam National Battlefield, biodiversity, collaborative conservation, IMD, landscape stewardship, Maryland, National Capital Region Network, National Park Service, natural resource management, NPS, NPS Inventory and Monitoring Division, NPS Species Inventory Program, park science
Products
- Inventory of Rare, Threatened, and Endangered Plant Species to Inform Woodland Management at Antietam National Battlefield: Sensitive Version
- Rare, Threatened and Endangered Plant Inventory at Antietam National Battlefield 2024 - 2025 - Open Format Dataset
- Inventory of Rare, Threatened, and Endangered Plant Species to Inform Woodland Management at Antietam National Battlefield
- Searching for the Rarest Plants at Antietam National Battlefield