Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Tina J Ayers"'
Autor:
Mariah S Carbone, Tina J Ayers, Christopher H Ebert, Seth M Munson, Edward A G Schuur, Andrew D Richardson
Publikováno v:
Radiocarbon. 65:357-374
We present a timeseries of 14CO2 for the period 1910–2021 recorded by annual plants collected in the southwestern United States, centered near Flagstaff, Arizona. This timeseries is dominated by five commonly occurring annual plant species in the r
The Phylogeny ofErrazurizia(Fabaceae: Amorpheae) and Description of the New Monotypic GenusPictarena
Autor:
L. Ellie Becklund, Tina J. Ayers
Publikováno v:
Systematic Botany. 47:1012-1024
—Errazurizia(Fabaceae) is a genus comprised of four species of New World desert shrubs with an ambiguous evolutionary history. Prior studies determined the North American species ofErrazuriziawere polyphyletic and the relationship ofE. rotundatawit
Autor:
Elizabeth P. Johnson, Tina J. Ayers
Publikováno v:
Systematic Botany. 47:61-84
— Diastatea (Campanulaceae-Lobelioideae) is a genus of small, herbaceous annuals found mostly in Mexico. Differences in the number of recognized species in the historical treatments, and the lack of a phylogeny, suggested that a revision of the gen
Autor:
Maya L. Allen, Tina J. Ayers
Publikováno v:
Systematic Botany. 46:562-572
— Glossopetalon inhabits arid regions in the American west and northern Mexico on limestone substrates. The genus comprises four species: G. clokeyi, G. pungens, G. texense, and G. spinescens. Three of the species are narrow endemics. The fourth, G
Publikováno v:
Journal of Plant Biochemistry and Biotechnology. 30:943-959
The development of salt‐tolerant genotypes is key to a better utilization of salinized irrigated lands. Given the relatively low genetic diversity within the cultivated wheats for salt tolerance, exploring the Aegilops cylindrica's genetic diversit
Autor:
Rich Crawford, Tina J. Ayers
Publikováno v:
Madroño. 64:51-58
Loeseliastrum franciscanum R. Crawford, a local endemic known from three populations in the eastern San Francisco volcanic field of Coconino County, northern Arizona is newly described and illustrated here. This species is similar to L. depressum (M.
Autor:
Shelley Silva, Tina J. Ayers
Publikováno v:
Natural Areas Journal. 36:166-176
During the past decade, three previously undescribed vascular plant species have been documented growing on Mancos Shale barrens in southwest Colorado. Soil chemistry has been correlated with the presence of some rare endemics elsewhere, such as spec
NEW SPECIES AND A NEW VARIETY OF NEMACLADUS (CAMPANULACEAE, NEMACLADOIDEAE) AND A KEY TO THE SPECIES
Autor:
Nancy R. Morin, Tina J. Ayers
Publikováno v:
Madroño. 67:35
In the course of preparing the treatment of Nemacladus (Campanulaceae, Nemacladoideae) for Volume 18 of Flora of North America north of Mexico, it has become apparent that several new taxa must be described and others recircumscribed. These are: two
Autor:
Tina J. Ayers, Elizabeth P. Johnson
Publikováno v:
The Southwestern Naturalist. 60:56-60
Morphometric and molecular data are presented that support the hypothesis that the rare endemic Packera franciscana (San Francisco Peaks groundsel) is hybridizing with another Packera species, Packera werneriifolia, which occurs at a lower elevation
Autor:
Tina J. Ayers, Meredith D. Jabis
Publikováno v:
Western North American Naturalist. 74:185-200
Understanding the causes of narrow endemism is crucial to conservation, particularly in biodiversity hotspots like the California Floristic Province. The loss of rare species as a consequence of climate change could result in substantial reductions i