Geographic Variation in Hesperia comma (Hesperiidae) in the Southern Sierra Nevada Mountains (California) with the Description of a New Subspecies

2021 ◽  
Vol 75 (3) ◽  
Author(s):  
James A. Scott
Keyword(s):  
Geographic Variation ◽  
Sierra Nevada ◽  
New Subspecies ◽  
Sierra Nevada Mountains

Temporal geographic variation in the lambing season of bighorn sheep

1982 ◽  
Vol 60 (8) ◽  
pp. 1781-1793 ◽  
Author(s):  
Richard W. Thompson ◽  
Jack C. Turner
Keyword(s):  
Plant Growth ◽  
Geographic Variation ◽  
Sierra Nevada ◽  
National Parks ◽  
Bighorn Sheep ◽  
Ovis Canadensis ◽  
Vegetative Development ◽  
Growing Seasons ◽  
Environmental Regimes ◽  
Sierra Nevada Mountains

Temporal geographic variation in lambing seasons was statistically assessed for 22 populations, including 5 ecological races, of North American bighorn sheep (Ovis canadensis ssp.) from the Canadian National Parks (52° N) to western Texas (30° N). Throughout their distribution, bighorn lambing occurs coincident with the period of vegetative development when the environmental regime ameliorates neonate survival. Analyses generally demonstrate later and shorter lambing seasons in higher latitudinal populations (P < 0.001). Inception of lambing occurs later with colder temperatures, increased snowfall, at higher latitudes and elevations, and with later and shorter growing seasons [Formula: see text]. Additionally, a significant (P < 0.001) divergence in the reproductive "strategy" (median onset and duration of lambing) exists between bighorn herds of the Sierra Nevada Mountains, California (37° N) and the Desert National Wildlife Range, Nevada (36° N) as a result of two distinct, but adjacent environmental regimes. Lambing in northern populations is cued to a brief, relatively predictable period of plant growth. Southern bighorn protract lambing such that some recruitment coincides with relatively unpredictable plant growth, triggered by erratic rains.

scholarly journals Erosion rates as a potential bottom‐up control of forest structural characteristics in the Sierra Nevada Mountains

Ecology ◽  
2015 ◽  
Vol 96 (1) ◽  
pp. 31-38 ◽  
Author(s):  
David T. Milodowski ◽  
Simon M. Mudd ◽  
Edward T. A. Mitchard
Keyword(s):  
Sierra Nevada ◽  
Structural Characteristics ◽  
Bottom Up ◽  
Erosion Rates ◽  
Sierra Nevada Mountains

scholarly journals Detection of drought‐induced blue oak mortality in the Sierra Nevada Mountains, California

Ecosphere ◽  
2021 ◽  
Vol 12 (6) ◽  
Author(s):  
Margarita Huesca ◽  
Susan L. Ustin ◽  
Kristen D. Shapiro ◽  
Ryan Boynton ◽  
James H. Thorne
Keyword(s):  
Sierra Nevada ◽  
Blue Oak ◽  
Sierra Nevada Mountains ◽  
Oak Mortality

Drought year changes in streambank profiles on incised streams in the Sierra Nevada Mountains

Geomorphology ◽  
1996 ◽  
Vol 15 (1) ◽  
pp. 47-56 ◽  
Author(s):  
K. Lynn Zong ◽  
Sherman Swanson ◽  
Tom Myers
Keyword(s):  
Sierra Nevada ◽  
Sierra Nevada Mountains

Value Messages Collide with Reality: Joseph Kurihara and the Power of Informal Education

2010 ◽  
Vol 50 (1) ◽  
pp. 1-33 ◽  
Author(s):  
Eileen H. Tamura
Keyword(s):  
Sierra Nevada ◽  
Informal Education ◽  
Eastern Slope ◽  
Sierra Nevada Mountains ◽  
Oil Tank

On a cool, crisp winter afternoon in a California desert, at the foot of the eastern slope of the Sierra Nevada Mountains, a crowd of more than two thousand people gathered. Some were curious; more were angry. Before all of them, standing on an oil tank with a microphone and loudspeaker, forty-seven-year-old Joseph Y. Kurihara shouted angry words of defiance. Referring to the generally despised Fred Tayama, who was assaulted the night before, Kurihara bellowed, “Why permit that sneak to pollute the air we breathe? … Let's kill him and feed him to the roving coyotes! … If the Administration refuses to listen to our demand, let us proceed with him and exterminate all other informers in this camp.”

The Sigmocheirini, a xystodesmid milliped tribe in the Sierra Nevada Mountains, California, U.S.A. (Polydesmida: Xystodesmidae)

1995 ◽  
Vol 26 (3) ◽  
pp. 339-360 ◽  
Author(s):  
Rowland M. Shelley
Keyword(s):  
Sierra Nevada ◽  
New Genus ◽  
San Joaquin Valley ◽  
Western Slope ◽  
Kern County ◽  
Pigmentation Pattern ◽  
Sierra Nevada Mountains

AbstractThe xystodesmid milliped tribe Sigmocheirini occupies a band along the western slope of the Sierra Nevada Mountains and eastern fringe of the San Joaquin Valley from Placer to Kern counties, California. It is comprised of two genera, Sigmocheir Chamberlin, with three species occurring from Placer to Tulare counties, and the monotypic Ochthocelata gen. n., the sole component, O. adynata sp. n., occurring in northern Kern County. The species of Sigmocheir display a distinctive, trimaculate pigmentation pattern with yellow middorsal and paranotal spots; the coloration of O. adynata is unknown. Sigmocheir calaveras Chamberlin is a senior name for S. dohenyi Chamberlin, the spelling of which was subsequently corrected to danehyi and assigned to the new genus, Tuolumnia, a synonym of Sigmocheir. Sigmocheir furcata sp. n. is proposed for forms from the northern generic range. The southernmost species is S. maculifer (Chamberlin), comb. n., transferred from Harpaphe Cook. The Sigmocheirini are related to the sympatric tribe Xystocheirini; relationships within Sigmocheir are hypothesized as maculifer + (calaveras + furcata).

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