Aspects of the Population Biology of Sugar Pine (Pinus lambertiana Dougl.) on an Elevational Gradient in the Sierra Nevada of Central California

1984 ◽  
Vol 111 (1) ◽  
pp. 126 ◽  
Author(s):  
Richard I. Yeaton
Keyword(s):  
Sierra Nevada ◽  
Population Biology ◽  
Elevational Gradient ◽  
Pinus Lambertiana ◽  
Central California ◽  
Sugar Pine

Population biology of sugar pine (Pinus lambertiana Dougl.) with reference to historical disturbances in the Lake Tahoe Basin: Implications for restoration

2011 ◽  
Vol 262 (5) ◽  
pp. 770-779 ◽  
Author(s):  
Patricia E. Maloney ◽  
Detlev R. Vogler ◽  
Andrew J. Eckert ◽  
Camille E. Jensen ◽  
David B. Neale
Keyword(s):  
Population Biology ◽  
Lake Tahoe ◽  
Lake Tahoe Basin ◽  
Pinus Lambertiana ◽  
Sugar Pine ◽  
Tahoe Basin

scholarly journals Effect of fire and thinning on fine-scale genetic structure and gene flow in fire-suppressed populations of sugar pine (Pinus lambertiana Douglas)

2018 ◽  
Author(s):  
Brandon M. Lind ◽  
Malcolm P. North ◽  
Patricia E. Maloney ◽  
Andrew J. Eckert
Keyword(s):  
Gene Flow ◽  
Genetic Structure ◽  
Sierra Nevada ◽  
Prescribed Fire ◽  
Management Practices ◽  
Fine Scale ◽  
Pinus Lambertiana ◽  
Sugar Pine ◽  
The Impact ◽  
Pine Species

AbstractHistorically, frequent, low-severity fires in dry western North American forests were a major driver of ecological patterns and processes, creating resilient ecosystems dominated by widely-spaced pine species. However, a century of fire-suppression has caused overcrowding, altering forest composition to shade-tolerant species, while increasing competition and leaving trees stressed and susceptible to pathogens, insects, and high-severity fire. Exacerbating the issue, fire incidence is expected to increase with changing climate, while fire season has been observed to begin earlier and last longer than historic trends. Forest thinning and prescribed fire have been identified as important management tools to mitigate these risks. Yet little is known of how thinning, fire, or their interaction affect contemporary evolutionary processes of constituent pine species that influence fitness and play an important role in the opportunity for selection and population persistence. We assessed the impact of widely used fuel reduction treatments and prescribed fire on fine-scale gene flow on an ecologically important and historically dominant shade-intolerant pine species of the Sierra Nevada, Pinus lambertiana Dougl. Treatment prescription (no-thin-no-fire, thin-no-fire, and fire-and-thin) was found to differentially affect both fine-scale spatial and genetic structure as well as effective gene flow in this species. Specifically, the thin-no-fire prescription increases genetic structure (spatial autocorrelation of relatives) between adults and seedlings, while seed and pollen dispersal increase and decrease, respectively, as a function of increasing disturbance intensity. While these results may be specific to the stands at our study site, they indicate how assumptions relating to genetic effects based on spatial structure can be misleading. It is likely that these disequilibrated systems will continue to evolve on unknown evolutionary trajectories. The long-term impacts of management practices on reduced fitness from inbreeding depression should be continually monitored to ensure resilience to increasingly frequent and severe fire, drought, and pest stresses.

Growth and defense inform large sugar pine (Pinus lambertiana) mortality in a fire‐excluded forest of the central Sierra Nevada

Trees ◽  
2021 ◽  
Author(s):  
Andrew W. Slack ◽  
Jeffrey M. Kane ◽  
Eric E. Knapp
Keyword(s):  
Sierra Nevada ◽  
Pinus Lambertiana ◽  
Sugar Pine

Near earthquakes in Central California*

1939 ◽  
Vol 29 (3) ◽  
pp. 427-462 ◽  
Author(s):  
Perry Byerly
Keyword(s):  
Least Squares ◽  
Travel Time ◽  
Sierra Nevada ◽  
Accurate Determination ◽  
Depth Of Focus ◽  
Surface Layers ◽  
P Waves ◽  
Central California ◽  
The Waves

Summary Least-squares adjustments of observations of waves of the P groups at central and southern California stations are used to obtain the speeds of various waves. Only observations made to tenths of a second are used. It is assumed that the waves have a common velocity for all earthquakes. But the time intercepts of the travel-time curves are allowed to be different for different shocks. The speed of P̄ is found to be 5.61 km/sec.±0.05. The speed for S̄ (founded on fewer data) is 3.26 km/sec. ± 0.09. There are slight differences in the epicenters located by the use of P̄ and S̄ which may or may not be significant. It is suggested that P̄ and S̄ may be released from different foci. The speed of Pn, the wave in the top of the mantle, is 8.02 km/sec. ± 0.05. Intermediate P waves of speeds 6.72 km/sec. ± 0.02 and 7.24 km/sec. ± 0.04 are observed. Only the former has a time intercept which allows a consistent computation of structure when considered a layer wave. For the Berkeley earthquake of March 8, 1937, the accurate determination of depth of focus was possible. This enabled a determination of layering of the earth's crust. The result was about 9 km. of granite over 23 km. of a medium of speed 6.72 km/sec. Underneath these two layers is the mantle of speed 8.02 km/sec. The data from other shocks centering south of Berkeley would not fit this structure, but an assumption of the thickening of the granite southerly brought all into agreement. The earthquakes discussed show a lag of Pn as it passes under the Sierra Nevada. This has been observed before. A reconsideration of the Pn data of the Nevada earthquake of December 20, 1932, together with the data mentioned above, leads to the conclusion that the root of the mountain mass projects into the mantle beneath the surface layers by an amount between 6 and 41 km.

Cybaeus (Araneae: Cybaeidae): the aspenicolens species group of the Californian clade

Zootaxa ◽  
2021 ◽  
Vol 4926 (2) ◽  
pp. 224-244
Author(s):  
ROBB BENNETT ◽  
CLAUDIA COPLEY ◽  
DARREN COPLEY
Keyword(s):  
Sierra Nevada ◽  
Species Group ◽  
Identification Key ◽  
Mountain Range ◽  
Kern County ◽  
East Central ◽  
Central California ◽  
Distribution Maps ◽  
Moist Forest ◽  
Species Groups

Species of North American Cybaeus L. Koch (Araneae: RTA clade: Cybaeidae) are common moist-forest spiders classified in Holarctic and Californian clades. Here, in the second paper in a planned series reviewing the six Californian clade species groups, we review the species of the aspenicolens group. We recognize five species in two subgroups: the aspenicolens subgroup (Cybaeus aspenicolens Chamberlin & Ivie, C. blasbes Chamberlin & Ivie, and C. coylei Bennett spec. nov.) and the fraxineus subgroup (C. fraxineus Bennett spec. nov. and C. thermydrinos Bennett). The species of the aspenicolens group have very restricted distributions on the western slopes of the central and southern Sierra Nevada mountain range from Tuolumne County south to northern Kern County in east central California, U.S.A. Descriptions, illustrations, distribution maps, and an identification key are provided for the five species as well as a discussion of conservation issues of relevance to the group. 

Characterizing Forest Floor Fuels Surrounding Large Sugar Pine (Pinus lambertiana) in the Klamath Mountains, California

2018 ◽  
Vol 92 (3) ◽  
pp. 181-190 ◽  
Author(s):  
Angelo A. DiMario ◽  
Jeffrey M. Kane ◽  
Erik S. Jules
Keyword(s):  
Forest Floor ◽  
Klamath Mountains ◽  
Pinus Lambertiana ◽  
Sugar Pine

Nesting habitat of Warbling Vireos across an elevational gradient in the southern Sierra Nevada

2007 ◽  
Vol 78 (3) ◽  
pp. 229-239 ◽  
Author(s):  
Kathryn L. Purcell
Keyword(s):  
Sierra Nevada ◽  
Elevational Gradient ◽  
Nesting Habitat

PINUS LAMBERTIANA, SUGAR PINE

2014 ◽  
pp. 1020-1022
Author(s):  
Henry John Elwes ◽  
Augustine Henry
Keyword(s):  
Pinus Lambertiana ◽  
Sugar Pine
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