Table 1.

Site descriptions and focal species.

Site Name	Biome	Location (Lat, Lon)	Obs. Years	Species
New Mexico	Chihuahuan Desert	32.62° N, 106.67° W	1915-1950	Bouteloua eriopoda
				Sporobolus flexuosus
Arizona	Sonoran Desert	31°50’ N, 110°53’ W	1915-1933	Bouteloua eriopoda
				Bouteloua rothrockii
Kansas	Southern mixed prairie	38.8° N, 99.3° W	1932-1972	Bouteloua curtipendula
				Bouteloua hirsuta
				Schizachyrium scoparium
Montana	Northern mixed prairie	46°19’ N, 105°48’ W	1926-1957	Bouteloua gracilis
				Hesperostipa comata
				Pascopyrum smithii
				Poa secunda
Idaho	Sagebrush steppe	44.2° N, 112.1° W	1926-1957	Artemisia tripartita
				Pseudoroegneria spicata
				Hesperostipa comata
				Poa secunda