Lyndon B. Johnson National Historical Park: Natural resource condition assessment.

Struthers, Kimberly; Valentine-Darby, Patricia; Chambers, Nina; Mathis, Allyson; Bennetts, Robert; Folts-Zettner, Tomye

The Natural Resource Condition Assessment (NRCA) Program, administered by National Park Service’s (NPS) Water Resources Division, aims to provide documentation about current conditions of important park natural resources through a spatially explicit, multi-disciplinary synthesis of existing scientific data and knowledge. The NRCA for Lyndon B. Johnson National Historical Park began in 2014, and 13 focal study natural resources were chosen for the park’s NRCA. These resources were organized into three categories that ranged in contexts from broader to narrower including landscape-scale, supporting environment (i.e., physical resources), and biological integrity, which included wildlife and vegetation topics. The landscape scale resources chosen for this assessment included viewshed, night sky, and soundscape. The viewshed was considered to be in good condition while night sky and soundscape were in moderate condition. The park’s supporting physical environment resource topics included air quality, geology, groundwater, and surface water quality. The condition for each of these resources varied between good for geology and surface water quality, moderate for groundwater, and significant concern for air quality. The biological integrity resources assessed included grasslands, riparian habitat, live oak, and exotic plants for vegetation and landbirds and White-tailed Deer & exotic Blackbuck Antelope for wildlife. The vegetation resources were in good to moderate condition, although exotic plants were considered to be of significant concern. The wildlife conditions were primarily good, except for landbirds, which were considered to be in good to moderate condition.

Lyndon B. Johnson National Historical Park: Natural resource condition assessment.

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