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Ploidy race distributions since the Last Glacial Maximum in the North American desert shrub, Larrea tridentata
A classic biogeographic pattern is the alignment of diploid, tetraploid and hexaploid races of creo- sote bush ( Larrea tridentata ) across the Chihua- huan, Sonoran and Mohave Deserts of westernExpand
High proportion of cactus species threatened with extinction
It is shown that cacti are among the most threatened taxonomic groups assessed to date, with 31% of the 1,478 evaluated species threatened, demonstrating the high anthropogenic pressures on biodiversity in arid lands. Expand
Holocene woodlands in the southwestern deserts.
Twenty-nine radiocarbon-dated pack rat middens document woodland communities in the deserts of the southwestern United States less than 10,000 years ago. A synchronous change from woodland to desertExpand
Gentry's Rio Mayo Plants. The Tropical Deciduous Forest and Environs of Northwest Mexico
Along with some of my students and friends, I had the pleasure twice to visit this Rio Mayo region and adjacent areas via the kind courtesy of co-author Thomas R. Van Devender, who carefully pointedExpand
Biogeographic implications of a packrat midden sequence from the Sacramento Mountains, south-central New Mexico
Abstract Thirteen packrat ( Neotoma spp.) and two porcupine ( Erethizon dorsatum ) middens from 1555 to 1690 m elevation from the Sacramento Mountains, New Mexico, provide an 18,000-yr vegetationExpand
Shasta ground sloth ( Nothrotheriops shastense hoffstetter) at Shelter Cave, New Mexico: Environment, diet, and extinction
Abstract Seven coprolites of the extinct Shasta ground sloth (Nothrotheriops shastense) were recently discovered in the Los Angeles County Museum collection from Shelter Cave, New Mexico. Three dungExpand
Paleoclimatic Implications of Holocene Plant Remains from the Sierra Bacha, Sonora, Mexico
Abstract A total of 93 plant taxa were identified from 11 packrat (Neotoma sp.) midden samples from the Sierra Bacha on the coast of the Gulf of California near Puerto Libertad, Sonora, Mexico. NineExpand
Late Pleistocene woodlands in the Bolson de Mapimi: A refugium for the Chihuahuan Desert Biota?
Abstract Packrat middens radiocarbon dated at 12,280 ± 345 and 12,700 ± 165 yr B.P. record expansions of junipers and papershell pinyon (Pinus remota) into the desert lowlands of Durango andExpand
A 22,000-year record of vegetation change in the north-central Sonoran Desert
Abstract Plant macrofossils from eleven packrat (Neotoma sp.) middens provide a history of vegetation change over the last 22,140 years at Eagle Eye Mountain, near the northern border of the SonoranExpand