No description available.

Tesis doct.--Facultad de filosofía y letras--San Sebastián--Universidad de Deusto, 1987.

Th. univ.--Littérature espagnole. N°: niversité de Zürich, 1993. / Notes bibliogr.

Texte remanié de: Th.--Londres--University of London, 1975. / Bibliogr. p. 321-331.

Tesis doctoral--Facultad de filoloxía--Universidad de A Coruña, 2001. / Bibliogr. p. 269-300.

No description available.

A report on the vegetation of the Cabeza Prieta NWR, with tables giving statistical representations of the vegetation associations.

Releve plot data for Cabeza Prieta NWR, sampled from 1999 to 2002

Shapefiles of the vegetation, watercourses, and sampling routes traveled, Cabeza Prieta NWR

Vegetation in the San Cristobal Valley of Barry M. Goldwater Range-East was mapped using a combination of field surveys and aerial imagery interpretation to contribute to ongoing inventory of natural resources for the BMGR-East as well as assist in resource management decisions. Eighteen vegetation associations were identified and mapped through collection of 186 samples to characterize vegetation associations. The most common vegetation association was Larrea tridentata monotype, covering 29% of the area mapped. Larrea tridentata is a widely spread shrub throughout the Sonoran, Chihuahuan and Mojave deserts; therefore understanding germination and seedling survival patterns is crucial. Ambrosia dumosa and A. deltoidea exhibit nurse plant-protégé interactions with L. tridentata. Seed density of L. tridentata was studied under Ambrosia species to determine factors controlling germination and seedling density. As expected seed density was greater under Ambrosia canopy than areas with no canopy. Ambrosia species and canopy type did not affect seed density.