Vegetation Changes from 1935 to 1980 in Mesquite Dunelands and Former Grasslands of Southern New Mexico
Hennessy JT, Gibbens RP, Tromble JM, Cardenas M. 1983. Vegetation Changes from 1935 to 1980 in Mesquite Dunelands and Former Grasslands of Southern New Mexico. Journal of Range Management. 36(3):370-374
On the Jornada Experimental Range in southern New Mexico, 2 belt transects, 30.5 cm in width and totaling 2188 m in length, were established in 1935 on 2 areas where honey mesquite (P. glandulosa Torr.) was spreading into black grama [Bouteloua eriopoda (Torr.) Torr] grassland. Maps were made of the transects which portrayed the vegetation occurring in each of the 7180 contiguous, 0.09-m2 plots along the transect. The vegetation on the transect maps made in 1935. One transect had been read in 1950 and 1955. During the 45-yr. period mesquite attained complete dominance and many new mesquite dunes formed. Black grama had a relatively high frequency in 1935 but had completely disappeared by 1980, both on an area grazed by livestock and on an area protected from grazing. Mesa dropseed [Sporobolus flexuosus (Thurb.) Rydb.], fluffgrass [Erioneuron pulchellumm (H.B.K.) Tateoka] and broom snakeweed [Xanthocephalum sarothrae (Pursh) Shinners] increased in abundance, even during the drought period between 1950 and 1955. Only 25% of the perennial forb species encountered in 1935-1955 were found in 1980.
- Type
- Journal Article
- Authors
- Hennessy, J; Gibbens, R; Tromble, J; Cardenas, M
- Units
- SODN
- Keywords
- Ecology, Plant Communities, Plant Studies