Walker, Gary

asu

There are 6 item/s.

TitleDateViewsBrief Description
Maintaining the Integrity of the Low-Elevation Granitic-Dome Communities of Carl Sandburg National Historic Site 2010 2324 A vegetational survey was conducted for the granitic rock-outcrop communities at Carl Sandburg National Historic Site (CARL). Low-elevation granitic domes within the boundaries of CARL have been recognized as a critical resource within the Park (Har...
Species-Area Relationships of Cliff System Vegetational Communities in Cumberland Gap National Historical Park 2013 2322 A vegetational survey of vascular plants, bryophytes, and lichens was conducted on eleven discrete cliff systems in Cumberland Gap National Historical Park (CUGA) during the summer of 2011 and 2012. A total of 231 species were collected and identifie...
The Population Genetic Structure Of The Showy Lady's-Slipper Orchid (Cypripedium Reginae Walter) In Its Glaciated And Unglaciated Ranges 2003 17 Cypripedium reginae is a terrestrial orchid with a boreal-temperate main range and a glacial-disjunct southern range primarily in the southern Appalachian Mountains. During the summer of 2001, tissue for allozyme and RAPD analysis was collected from ...
Nitrogen Availability and Vegetational Community Structure on a Cliff System in the Southern Appalachians 2015 803 While research in almost every ecosystem confirms the importance of nutrient cycling to community dynamics, it has been an under-investigated aspect of cliff ecology. This study explores the influence that nitrogen availability and other abiotic var...
The Population Biology Of PELLAEA WRIGHTIANA Hooker, A Fern Disjunct In North Carolina 1996 7 Pellaea wrightiana Hooker is a homosporous fern with a main range throughout most of the southwestern United States. In 1956, a small population of Pellaea wrightiana was discovered in Alexander County, North Carolina. In 1974, a second population wa...
A Preliminary Study Of Population Structure Of SIBBALDIOPSIS TRIDENTATA (AIT.) RYDG. (ROSACEAE) In The Eastern United States Using AFLP Markers 2008 8 High-elevation habitats in the Appalachian Mountains of the United States have been shown to harbor many northern disjunct species. Prevailing theory is that populations in these habitats typically represent remnant-isolate populations from previousl...