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1. Accumulation of salt-rich dust from Owens Lake playa in nearby alluvial soils

Author:
Quick, Dayna J.; Chadwick, Oliver A.
Source:
Aeolian research 2011 v.3 no.1 pp. 23-29
ISSN:
1875-9637
Subject:
Sierra Nevada (California),   etc   ; adsorption; alluvial soils; electrical conductivity; lakes; pH; piedmont soils; playas; salts; semiarid soils; semiarid zones; sodium; topography; wind; California;     Show all 15 Subjects
Abstract:
... Over the last 100years, Owens Lake playa in eastern California has been one of the largest point sources of PM-10 dust in the United States. Here we evaluate the spatial impact of the salt-rich playa dust on the alluvial piedmont soils of Owens Valley with the expectation that those nearest the playa will have the highest concentrations of playa-derived salts. We sampled soils of similar age on al ...
DOI:
10.1016/j.aeolia.2011.03.004

2. A forest reconstruction model to assess changes to Sierra Nevada mixed-conifer forest during the fire suppression era

Author:
Barth, Molly A.F.; Larson, Andrew J.; Lutz, James A.
Source:
Forest ecology and management 2015 v.354 pp. 104-118
ISSN:
0378-1127
Subject:
Sierra Nevada (California),   etc   ; tree growth; national parks; planning; managers; dead wood; data collection; coniferous forests; Pinus lambertiana; decayed wood; fire suppression; fire regime; forest management; growth models; mountains; species diversity; trees; ecosystems; stand basal area; prediction;     Show all 20 Subjects
Abstract:
... Fire suppression has resulted in dramatic changes to species composition and structural diversity in the Sierra Nevada mixed-conifer forests. We need a better understanding of how these forests have changed during the fire suppression era, but empirical historical datasets are rare and methodologies for developing new historical reference information are subject to limitations. We sought to develo ...
DOI:
10.1016/j.foreco.2015.06.030

3. A loess–paleosol record of climate and glacial history over the past two glacial–interglacial cycles (~150ka), southern Jackson Hole, Wyoming

Author:
Pierce, Kenneth L.; Muhs, Daniel R.; Fosberg, Maynard A.; Mahan, Shannon A.; Rosenbaum, Joseph G.; Licciardi, Joseph M.; Pavich, Milan J.
Source:
Quaternary research 2011 v.76 no.1 pp. 119-141
ISSN:
0033-5894
Subject:
Sierra Nevada (California),   etc   ; clay; glaciation; isotopes; lakes; loess; models; oxygen; particle size; rock flour; semiarid zones; soil; soil formation; terraces; thermoluminescence; vegetation; Wyoming;     Show all 17 Subjects
Abstract:
... Loess accumulated on a Bull Lake outwash terrace of Marine Oxygen Isotope Stage 6 (MIS 6) age in southern Jackson Hole, Wyoming. The 9 m section displays eight intervals of loess deposition (Loess 1 to Loess 8, oldest), each followed by soil development. Our age-depth model is constrained by thermoluminescence, meteoric ¹⁰Be accumulation in soils, and cosmogenic ¹⁰Be surface exposure ages. We use ...
DOI:
10.1016/j.yqres.2011.03.006

4. Altitudinal Variation in the Life History of the Golden‐Mantled Ground Squirrel (Spermophilus Lateralis)

Author:
Bronson, Michael T.
Source:
Ecology 1979 v.60 no.2 pp. 272-279
ISSN:
0012-9658
Subject:
Sierra Nevada (California),   etc   ; Spermophilus; adults; altitude; body weight; covariance; early selection; embryonic mortality; fecundity; juveniles; life history; litter size; ova; ovulation; phenotypic plasticity; sex ratio; survival rate; tooth wear; winter;     Show all 19 Subjects
Abstract:
... The life history of golden—mantled ground squirrels (Spermophilus lateralis) varied across a climatic gradient. I live— and snap—trapped at 4 and 5 elevations, respectively, in the northeastern Sierra Nevada of California for 3 yr. Higher elevation populations were characterized by (1) shorter aboveground active seasons of adults and juveniles, (2) later age at first reproduction in ♀ ♀, (3) great ...
DOI:
10.2307/1937655

5. Analysing the effects of the 2002 McNally fire on air quality in the San Joaquin Valley and southern Sierra Nevada, California

Author:
Cisneros, Ricardo; Schweizer, Donald; Zhong, Sharon; Hammond, Katharine; Perez, Miguel A.; Guo, Qinghua; Traina, Samuel; Bytnerowicz, Andrzej; Bennett, Deborah H.
Source:
International journal of wildland fire 2012 v.21 no.8 pp. 1065-1075
ISSN:
1049-8001
Subject:
Sierra Nevada (California),   etc   ; air quality; wildfires; valleys; particulates; Nevada; Sequoia National Forest; California;     Show all 8 Subjects
Abstract:
... Smoke from wildfires can expose individuals and populations to elevated levels of particulate matter (PM) and ozone (O3). Between 21 July and 26 August 2002, the McNally Fire burned over 150000 acres (61000ha). The fire occurred in the Sequoia National Forest, in the southern Sierra Nevada of California. This study evaluated the effects of the McNally Fire on air quality, specifically particles <1 ...
DOI:
10.1071/WF11025

6. An assessment of ozone concentrations within and near the Lake Tahoe Air Basin

Author:
Dolislager, Leon J.; VanCuren, Richard; Pederson, James R.; Lashgari, Ash; McCauley, Eileen
Source:
Atmospheric environment 2012 v.46 pp. 645-654
ISSN:
1352-2310
Subject:
Sierra Nevada (California),   etc   ; air; air pollution; air quality; atmospheric chemistry; atmospheric deposition; basins; emissions; forest health; lakes; mixing; monitoring; nitrogen; nitrogen oxides; organic compounds; ozone; particulates; pollution control; public health; vegetation; volatile organic compounds; California; Nevada;     Show all 23 Subjects
Abstract:
... The Lake Tahoe Atmospheric Deposition Study (LTADS) was conducted by the Air Resources Board of the State of California (CARB) primarily to generate refined estimates of the atmospheric deposition of nitrogen, phosphorous, and particulate matter directly to Lake Tahoe, which straddles the border between the states of California and Nevada near Reno, Nevada. The enhanced air quality monitoring duri ...
DOI:
10.1016/j.atmosenv.2009.07.017

7. A New Method for Segmenting Individual Trees from the Lidar Point Cloud

Author:
Li, Wenkai; Guo, Qinghua; Jakubowski, Marek K.; Kelly, Maggi
Source:
Photogrammetric engineering and remote sensing 2012 v.78 no.1 pp. 75-84
ISSN:
0099-1112
Subject:
Sierra Nevada (California),   etc   ; algorithms; canopy; coniferous forests; conifers; lidar; methodology; models; trees;     Show all 9 Subjects
Abstract:
...

Light Detection and Ranging (lidar) has been widely applied to characterize the 3-dimensional (3D) structure of forests as it can generate 3D point data with high spatial resolution and accuracy. Individual tree segmentations, usually derived from the canopy height model, are used to derive individual tree structural attributes such as tree height, crown diameter, canopy-based height, and ot ...

DOI:
10.14358/PERS.78.1.75

8. Apparent climatically induced increase of tree mortality rates in a temperate forest

Author:
van Mantgem, Phillip J.; Stephenson, Nathan L.
Source:
Ecology letters 2007 v.10 no.10 pp. 909-916
ISSN:
1461-023X
Subject:
Sierra Nevada (California),   etc   ; Picea abies; biotic stress; climate; dieback; drought; forest types; mortality; old-growth forests; temperate forests; temperature; tree mortality; trees; water stress;     Show all 14 Subjects
Abstract:
... We provide a first detailed analysis of long-term, annual-resolution demographic trends in a temperate forest. After tracking the fates of 21 338 trees in a network of old-growth forest plots in the Sierra Nevada of California, we found that mortality rate, but not the recruitment rate, increased significantly over the 22 years of measurement (1983-2004). Mortality rates increased in both of two d ...
DOI:
10.1111/j.1461-0248.2007.01080.x
PubMed:
17845291

9. Applications of optical spectroscopy and stable isotope analyses to organic aerosol source discrimination in an urban area

Author:
Mladenov, N.; Alados-Arboledas, L.; Olmo, F.J.; Lyamani, H.; Delgado, A.; Molina, A.; Reche, I.
Source:
Atmospheric environment 2011 v.45 no.11 pp. 1960-1969
ISSN:
1352-2310
Subject:
Sierra Nevada (California),   etc   ; aerosols; atmospheric chemistry; carbon; climate; data collection; factor analysis; fluorescence; fluorescence emission spectroscopy; fossil fuels; humans; humification; models; naphthalene; organic matter; particulates; pollution; stable isotopes; urban areas; Spain;     Show all 20 Subjects
Abstract:
... Understanding the chemical character of organic aerosols is extremely important for evaluating their role in climate forcing and human respiratory health. Aerosol columnar properties retrieved by sun photometry represent a large dataset of information about the physical and light absorbing and scattering properties of the total aerosol, but lack more detailed chemical information about the organic ...
DOI:
10.1016/j.atmosenv.2011.01.029

10. Arctostaphylos Myrtifolia, Its Biology and Relationship to the Problem of Endemism

Author:
Gankin, Roman; Major, Jack
Source:
Ecology 1964 v.45 no.4 pp. 792-808
ISSN:
0012-9658
Subject:
Sierra Nevada (California),   etc   ; Arctostaphylos; acid soils; acid tolerance; altitude; biogeography; climate; diploidy; evapotranspiration; heat; hills; indigenous species; leaching; mountains; nutrients; seedlings; soil parent materials; spring; summer; temperature; vegetation; winter; California; Mediterranean region;     Show all 24 Subjects
Abstract:
... Arctostaphylos myrtifolia is a California endemic plant limited to only certain outcrops of an Eocene laterite in the Sierra Nevada foothills near Ione and to a kaolin—altered rhyolite and an acid sericitic schist eastward at higher altitudes of 500 m. Taxonomically the diploid species is isolated. Morphologically it resembles a low, sclerophyllous heath. The plants are killed by fire, but seedlin ...
DOI:
10.2307/1934926

11. Are we in the midst of the sixth mass extinction? A view from the world of amphibians

Author:
Wake, David B.; Vredenburg, Vance T.
Source:
Proceedings of the National Academy of Sciences of the United States of America 2008 v.105 no.Supplement_1 pp. 11466-11473
ISSN:
0027-8424
Subject:
Sierra Nevada (California),   etc   ; biodiversity; caecilians; emerging diseases; extinction; frogs; fungi; global warming; habitat destruction; humans; indigenous species; mountains; pathogens; pollution; predators; risk; salamanders and newts; scientists; threatened species; tropics; virulence;     Show all 21 Subjects
Abstract:
... Many scientists argue that we are either entering or in the midst of the sixth great mass extinction. Intense human pressure, both direct and indirect, is having profound effects on natural environments. The amphibians--frogs, salamanders, and caecilians--may be the only major group currently at risk globally. A detailed worldwide assessment and subsequent updates show that one-third or more of th ...
DOI:
10.1073/pnas.0801921105
PubMed:
18695221
PubMed Central:
PMC2556420

12. Assessing Nitrogen-Saturation in a Seasonally Dry Chaparral Watershed: Limitations of Traditional Indicators of N-Saturation

Author:
Homyak, Peter M.; Sickman, James O.; Miller, Amy E.; Melack, John M.; Meixner, Thomas; Schimel, Joshua P.
Source:
Ecosystems 2014 v.17 no.7 pp. 1286-1305
ISSN:
1432-9840
Subject:
Sierra Nevada (California),   etc   ; chaparral; dry environmental conditions; ecosystems; emissions; growing season; hydrology; nitrates; nitrification; nitrogen; soil; streams; watersheds; wet season; California;     Show all 15 Subjects
Abstract:
... To evaluate nitrogen (N) saturation in xeric environments, we measured hydrologic N losses, soil N pools, and microbial processes, and developed an N-budget for a chaparral catchment (Sierra Nevada, California) exposed to atmospheric N inputs of approximately 8.5 kg N ha⁻¹ y⁻¹. Dual-isotopic techniques were used to trace the sources and processes controlling nitrate (NO₃ ⁻) losses. The majority of ...
DOI:
10.1007/s10021-014-9792-2

13. Assessment of methods for mapping snow cover from MODIS

Author:
Rittger, Karl; Painter, Thomas H.; Dozier, Jeff
Source:
Advances in water resources 2013 v.51 pp. 367-380
ISSN:
0309-1708
Subject:
Sierra Nevada (California),   etc   ; Landsat; climate; energy; glaciology; hydrology; land cover; melting; mixing; moderate resolution imaging spectroradiometer; snow; snowpack; soil; spring; summer; vegetation; water resources; winter; California; Colorado; Himalayan region; Nepal; Rocky Mountain region;     Show all 23 Subjects
Abstract:
... Characterization of snow is critical for understanding Earth’s water and energy cycles. Maps of snow from MODIS have seen growing use in investigations of climate, hydrology, and glaciology, but the lack of rigorous validation of different snow mapping methods compromises these studies. We examine three widely used MODIS snow products: the “binary” (i.e., snow yes/no) global snow maps that were am ...
DOI:
10.1016/j.advwatres.2012.03.002

14. Association of the arboreal forage lichen Bryoria fremontii with Abies magnifica in the Sierra Nevada, California

Author:
Rambo, Thomas R.
Source:
Canadian journal of forest research = 2012 v.42 no.8 pp. 1587-1596
ISSN:
1208-6037
Subject:
Sierra Nevada (California),   etc   ; Abies concolor; Abies magnifica; Bryoria; Pinus lambertiana; acidity; ammonium compounds; conifers; forage; forests; lichens; microclimate; mountains; nutrients; pH; potassium; spring; thallus; vapor pressure; California;     Show all 20 Subjects
Abstract:
... A strong positive association exists between Bryoria fremontii (Tuck.) Brodo & D. Hawksw. and red fir (Abies magnifica A. Murray) in mixed-conifer forest of the south-central Sierra Nevada in California. The hypotheses that red fir microclimate, foliar leachate pH, mineral nutrients, and needle morphology may be especially favorable for B. fremontii were investigated in this study. There were no s ...
DOI:
10.1139/x2012-099

15. Atmospheric Methyl Tertiary Butyl Ether (MTBE) at a Rural Mountain Site in California

Author:
Schade, Gunnar W.; Dreyfus, Gabrielle B.; Goldstein, Allen H.
Source:
Journal of environmental quality 2002 v.31 no.4 pp. 1088-1094
ISSN:
1537-2537
Subject:
Sierra Nevada (California),   etc   ; air; detection limit; forests; free radicals; mixing; oxidants; oxidation; pentane; surface water; toluene; topographic slope; California;     Show all 13 Subjects
Abstract:
... Methyl tertiary butyl ether (MTBE) was measured in air samples collected at hourly intervals near Blodgett Forest Research Station on the western slope of the Sierra Nevada, California, in July 1997, October 1998, and June through September 1999. Mixing ratios ranged from below the detection limit (< approximately 0.01 ppbv) to 0.5 ppbv, but were generally less than 0.3 ppbv. At these mixing ratio ...
DOI:
10.2134/jeq2002.1088

16. Avian Response to Mechanical Aspen Restoration in Sierra Nevada Coniferous Forest

Author:
Campos, Brent R.; Burnett, Ryan D.
Source:
Restoration ecology 2014 v.22 no.5 pp. 616-624
ISSN:
1061-2971
Subject:
Sierra Nevada (California),   etc   ; birds; canopy; conifers; ecological value; forests; habitats; landscapes; nesting; overstory; shrubs; stems; understory; Lassen National Forest; North America;     Show all 15 Subjects
Abstract:
... Using mechanical treatments to mimic natural disturbances is becoming a standard management and restoration approach. In the Sierra Nevada, as throughout much of western North America, much of aspen habitat is in poor health. Because of the high ecological value of healthy aspen, and its limited extent on the landscape, restoration to reverse the decline and improve stand health has become a manag ...
DOI:
10.1111/rec.12114

17. Benthic macroinvertebrates as indicators of biological condition below hydropower dams on west slope Sierra Nevada streams, California, USA

Author:
Rehn, Andrew C.
Source:
River research and applications 2009 v.25 no.2 pp. 208-228
ISSN:
1535-1459
Subject:
Sierra Nevada (California),   etc   ; dams (hydrology); data collection; energy; freshwater; geographic information systems; habitats; humans; hydrochemistry; indicator species; land use; macroinvertebrates; screening; streams; water power; California;     Show all 16 Subjects
Abstract:
... Over 50 hydropower dams in California will undergo relicensing by the Federal Energy Regulatory Commission (FERC) in the next 15 years. An interpretive framework for biological data collected by relicensing studies is lacking. This study developed a multi-metric index of biotic integrity (IBI) to assess biological condition below hydropower diversion dams on west slope Sierra Nevada streams based ...
DOI:
10.1002/rra.1121

18. Biogeography in the life and literature of John Muir: a ceaseless search for pattern

Author:
McDowall, R.M.
Source:
Journal of biogeography 2010 v.37 no.9 pp. 1629-1636
ISSN:
0305-0270
Subject:
Sierra Nevada (California),   etc   ; biogeography; forests; mountains; national parks; people; Africa; Alaska; Asia; Europe; South America;     Show all 11 Subjects
Abstract:
... John Muir has long been known as a significant figure in the history of conservation, including for promoting the recognition of the Yosemite Valley in the Sierra Nevada Mountains of California as a national park by the American people and government. Muir is known particularly for his pivotal involvement in the establishment of the Sierra Club, one of North America's leading conservation associat ...
DOI:
10.1111/j.1365-2699.2010.02351.x

19. Bird communities in thinned versus unthinned sierran mixed conifer stands

Author:
SIEGEL, RODNEY B.; DeSANTE, DAVID F.
Source:
The Wilson bulletin 2003 v.115 no.2 pp. 155-165
ISSN:
0043-5643
Subject:
Sierra Nevada (California),   etc   ; Ceanothus integerrimus; biomass; birds; breeding; breeding season; canopy; community structure; coniferous forests; conifers; fire suppression; forage; forest thinning; logging; monitoring; nesting; nests; shrubs; understory; California;     Show all 20 Subjects
Abstract:
... We used point counts and nest monitoring to compare avian community composition and nesting success in thinned and unthinned stands of commercially managed Sierran mixed conifer forest. We conducted point counts and monitored 537 active nests of 37 species on 10 study plots during three consecutive breeding seasons in the northern Sierra Nevada. All 10 study plots had experienced a similar long te ...
DOI:
10.1676/02-103

20. Birds track their Grinnellian niche through a century of climate change

Author:
Tingley, Morgan W.; Monahan, William B.; Beissinger, Steven R.; Moritz, Craig
Source:
Proceedings of the National Academy of Sciences of the United States of America 2009 v.106 no.Supplement_2 pp. 19637-19643
ISSN:
0027-8424
Subject:
Sierra Nevada (California),   etc   ; birds; climate change; climate models; climatic factors; extinction; mountains; niches; temperature;     Show all 9 Subjects
Abstract:
... In the face of environmental change, species can evolve new physiological tolerances to cope with altered climatic conditions or move spatially to maintain existing physiological associations with particular climates that define each species' climatic niche. When environmental change occurs over short temporal and large spatial scales, vagile species are expected to move geographically by tracking ...
DOI:
10.1073/pnas.0901562106
PubMed:
19805037
PubMed Central:
PMC2780944