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- African Sahel (1)
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- Coconino NF (1)
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Articles 1 - 30 of 31
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Road Dust Correlated With Decreased Reproduction Of The Endangered Utah Shrub Hesperidanthus Suffrutescens, Matthew B. Lewis, Eugene W. Schupp, Thomas A. Monaco
Road Dust Correlated With Decreased Reproduction Of The Endangered Utah Shrub Hesperidanthus Suffrutescens, Matthew B. Lewis, Eugene W. Schupp, Thomas A. Monaco
Wildland Resources Faculty Publications
Roads associated with energy development have fragmented much of the Uinta Basin, the Colorado Plateau in general, and other areas of western North America. Beyond reducing available habitat, spreading exotic species, and creating barriers to dispersal, unpaved roads also increase dust loads on plants and pollinators, which may reduce plant growth and reproduction. We studied the effects of an unpaved road on reproduction of an endangered Utah endemic shrub. We measured the size and reproductive output of 156 plants and the dust deposition in plots at increasing distances from the road. We also hand outcrossed 240 flowers from 80 plants …
Efficacy Of Two Hortiled Fixtures, Jakob Johnson, Paul Kusuma, Bruce Bugbee
Efficacy Of Two Hortiled Fixtures, Jakob Johnson, Paul Kusuma, Bruce Bugbee
Controlled Environments
We tested the efficacy of the Full Spectrum and Red-Blue HORTILED TOP LED fixtures manufactured by PL Light. Both fixtures had an 80° light distribution.
The efficacy of the fixtures was measured using flat plane integration as described by Nelson and Bugbee (2014)1 (see adjacent photo). The fixtures were suspended at 0.65 m above the floor in a 3 × 3 m room with flat black walls. The photosynthetic photon flux density (PPFD, μmol · m-2 · s-1) was measured with a recently calibrated quantum sensor (LI-COR model 190R). Measurements were made 2.5 cm apart near …
Oystershell Scale Impacts And Mitigation Options On The Kaibab And Coconino Nf’S, Amanda M. Grady
Oystershell Scale Impacts And Mitigation Options On The Kaibab And Coconino Nf’S, Amanda M. Grady
Aspen Bibliography
This report documents a site visit to evaluate aspen stands experiencing oystershell scale damage on the Kaibab and Coconino National Forest’s. The site visit was requested by Kaibab NF, foresters including; Josh Giles, Jessi Outzs, Michael Sedgeman, Woody Rokala and Coconino Silviculturist, Mark Nabel. On November 19, 2016, Amanda Grady accompanied the individuals listed above, to evaluate stand conditions within three aspen exclosures. Two were located on the Williams Ranger District, Kaibab NF in the vicinity of Spring Valley. The third exclosure was located on the Flagstaff RD, Coconino NF and accessed from HWY 89-A via the Pump House Wash …
Salinity Tolerance Of Three Competing Rangeland Plant Species: Studies In Hydroponic Culture, Joseph K. Sagers, Blair L. Waldrom, Joseph Earl Creech, Ivan W. Mott, Bruce Bugbee
Salinity Tolerance Of Three Competing Rangeland Plant Species: Studies In Hydroponic Culture, Joseph K. Sagers, Blair L. Waldrom, Joseph Earl Creech, Ivan W. Mott, Bruce Bugbee
Plants, Soils, and Climate Faculty Publications
Halogeton (Halogeton glomeratus) is an invasive species that displaces Gardner's saltbush (Atriplex gardneri) on saline rangelands, whereas, forage kochia (Bassia prostrata) potentially can rehabilitate these ecosystems. Salinity tolerance has been hypothesized as the predominant factor affecting frequency of these species. This study compared relative salinity tolerance of these species, and tall wheatgrass (Thinopyrum ponticum) and alfalfa (Medicago sativa). Plants were evaluated in hydroponics, eliminating the confounding effects of drought, for 28 days at 0, 150, 200, 300, 400, 600, and 800 mmol/L NaCl. Survival, growth, and ion accumulation were determined. …
Large-Scale Control Of The Arabian Sea Monsoon Inversion In August, Shih-Yu (Simon) Wang
Large-Scale Control Of The Arabian Sea Monsoon Inversion In August, Shih-Yu (Simon) Wang
Plants, Soils, and Climate Faculty Publications
The summer monsoon inversion in the Arabian Sea is characterized by a large amount of low clouds and August as the peak season. Atmospheric stratification associated with the monsoon inversion has been considered a local system influenced by the advancement of the India–Pakistan monsoon. Empirical and numerical evidence from this study suggests that the Arabian Sea monsoon inversion is linked to a broader-scale monsoon evolution across the African Sahel, South Asia, and East Asia–Western North Pacific (WNP), rather than being a mere byproduct of the India–Pakistan monsoon progression. In August, the upper-tropospheric anticyclone in South Asia extends sideways corresponding with …
General Control Nonrepressible4 Degrades 14-3-3 And The Rin4 Complex To Regulate Stomatal Aperture With Implications On Nonhost Disease Resistance And Drought Tolerance, Amita Kaundal, Vemenna S. Ramu, Sunhee Oh, Seonghee Lee, Bikram Pant, Hee-Kyung Lee, Clemencia M. Rojas, Muthappa Senthil-Kumar, Kirankumar S. Mysore
General Control Nonrepressible4 Degrades 14-3-3 And The Rin4 Complex To Regulate Stomatal Aperture With Implications On Nonhost Disease Resistance And Drought Tolerance, Amita Kaundal, Vemenna S. Ramu, Sunhee Oh, Seonghee Lee, Bikram Pant, Hee-Kyung Lee, Clemencia M. Rojas, Muthappa Senthil-Kumar, Kirankumar S. Mysore
Plants, Soils, and Climate Faculty Publications
Plants have complex and adaptive innate immune responses against pathogen infections. Stomata are key entry points for many plant pathogens. Both pathogens and plants regulate stomatal aperture for pathogen entry and defense, respectively. Not all plant proteins involved in stomatal aperture regulation have been identified. Here, we report GENERAL CONTROL NONREPRESSIBLE4 (GCN4), an AAA+-ATPase family protein, as one of the key proteins regulating stomatal aperture during biotic and abiotic stress. Silencing of GCN4 in Nicotiana benthamiana and Arabidopsis thaliana compromises host and nonhost disease resistance due to open stomata during pathogen infection. AtGCN4 overexpression plants have reduced H+-ATPase activity, stomata …
Movement Of Cryptosporidium Parvum Oocysts Through Soils Without Preferential Pathways: Exploratory Test, Christophe J.G. Darnault, Zhenyang Peng, Chan Yu, Biting Li, Astrid R. Jacobson, Philippe C. Baveye
Movement Of Cryptosporidium Parvum Oocysts Through Soils Without Preferential Pathways: Exploratory Test, Christophe J.G. Darnault, Zhenyang Peng, Chan Yu, Biting Li, Astrid R. Jacobson, Philippe C. Baveye
Plants, Soils, and Climate Faculty Publications
Groundwater contamination by oocysts of the waterborne pathogen Cryptosporidium parvum is a significant cause of animal and human disease worldwide. Although research has been undertaken in the past to determine how specific physical and chemical properties of soils affect the risk of groundwater contamination by C. parvum, there is as yet no clear conclusion concerning the range of mobility of C. parvum that one should expect in field soils. In this context, the key objective of this research was to determine the magnitude of C. parvum transport in a number of soils, under conditions in which fast and preferential …
A Pre-Emptive Rangeland Restoration Approach To Improving Biodiversity And Provision Of Ecosystem Services, Kari E. Veblen
A Pre-Emptive Rangeland Restoration Approach To Improving Biodiversity And Provision Of Ecosystem Services, Kari E. Veblen
Funded Research Records
No abstract provided.
Effect Of Wood Chips And Rice Hulls On Water Holding Capacity Of A Peat‐Based Substrate, Jakob Johnson, Will Wheeler, Mara Braddy, Bruce Bugbee
Effect Of Wood Chips And Rice Hulls On Water Holding Capacity Of A Peat‐Based Substrate, Jakob Johnson, Will Wheeler, Mara Braddy, Bruce Bugbee
Plants, Soils, and Climate Faculty Publications
The study included 13 substrates with different ratios of four media components. Four species of plants were grown (Vinca, Verbena, Impatiens, and Petunia), each with two replicate plants of each of the 13 substrates.
Each 1 Liter container, with approximately 850 mL of media volume, was fully hydrated and weighed to determine a maximum mass. Plants were then grown for three days until they wilted. Wilting was visually quantified on each pot. When the plant wilted, the container was weighed again to determine the minimum mass. The container was then re-‐hydrated to determine a second replicate maximum mass. The two …
Accelerated Increase In The Arctic Tropospheric Warming Events Surpassing Stratospheric Warming Events During Winter, Shih-Yu (Simon) Wang, Yen-Heng Lin, Ming-Ying Lee, Jin-Ho Yoon, Jonathan D.D. Meyer, Philip J. Rasch
Accelerated Increase In The Arctic Tropospheric Warming Events Surpassing Stratospheric Warming Events During Winter, Shih-Yu (Simon) Wang, Yen-Heng Lin, Ming-Ying Lee, Jin-Ho Yoon, Jonathan D.D. Meyer, Philip J. Rasch
Plants, Soils, and Climate Faculty Publications
In January 2016, a robust reversal of the Arctic Oscillation (AO) took place associated with a rapid tropospheric warming in the Arctic region; this was followed by the occurrence of a classic sudden stratospheric warming in March-April. The succession of these two distinct Arctic warming events provides a stimulating opportunity to examine their characteristics in terms of similarities and differences. Historical cases of these two types of Arctic warming were identified and validated based upon tropical linkages with the Madden-Julian Oscillation and El Niño as well as those documented in previous studies. Our results indicate a recent and accelerated increase …
Double-Ended High Pressure Sodium Fixtures Decline Less Than 6% Over 2 Years And 5000 Hours, Jakob Johnson, Bruce Bugbee
Double-Ended High Pressure Sodium Fixtures Decline Less Than 6% Over 2 Years And 5000 Hours, Jakob Johnson, Bruce Bugbee
Publications
Double-ended (DE) high pressure sodium (HPS) lights with electronic ballasts are reported to age more slowly than the old mogul base technology with magnetic ballasts, but aging has not been well studied in a greenhouse environment. Both dirt accumulation and age can decrease output.
Species Delimitation And Lineage Separation History Of A Species Complex Of Aspens In China, Honglei Zheng, Liqiang Fan, Richard I. Milne, Lei Zhang, Yaling Wang, Kangshan Mao
Species Delimitation And Lineage Separation History Of A Species Complex Of Aspens In China, Honglei Zheng, Liqiang Fan, Richard I. Milne, Lei Zhang, Yaling Wang, Kangshan Mao
Aspen Bibliography
Species delimitation in tree species is notoriously challenging due to shared polymorphisms among species. An integrative survey that considers multiple operational criteria is a possible solution, and we aimed to test it in a species complex of aspens in China. Genetic [four chloroplast DNA (cpDNA) fragments and 14 nuclear microsatellite loci (nSSR)] and morphological variations were collected for 76 populations and 53 populations, respectively, covering the major geographic distribution of the Populus davidiana-rotundifoliacomplex. Bayesian clustering, analysis of molecular variance (AMOVA), Principle Coordinate Analysis (PCoA), ecological niche modeling (ENM), and gene flow (migrants per generation), were employed to …
Invasive Species Control And Perennial Plant Establishment In Antelope Pasture, Pocatello, Blm, Kari E. Veblen
Invasive Species Control And Perennial Plant Establishment In Antelope Pasture, Pocatello, Blm, Kari E. Veblen
Funded Research Records
No abstract provided.
Identification And Characterization Of An Efficient Acyl-Coa:Diacylglycerol Acyltransferase 1 (Dgat1) Gene From The Microalga Chlorella Ellipsoidea, Xuejie Guo, Chengming Fan, Yuhong Chen, Jingqiao Wang, Weibo Yin, Richard R. C. Wang, Zanmin Hu
Identification And Characterization Of An Efficient Acyl-Coa:Diacylglycerol Acyltransferase 1 (Dgat1) Gene From The Microalga Chlorella Ellipsoidea, Xuejie Guo, Chengming Fan, Yuhong Chen, Jingqiao Wang, Weibo Yin, Richard R. C. Wang, Zanmin Hu
Forage and Range Research Laboratory Publications
Background: Oil in the form of triacylglycerols (TAGs) is quantitatively the most important storage form of energy for eukaryotic cells. Diacylglycerol acyltransferase (DGAT) is considered the rate-limiting enzyme for TAG accumulation. Chlorella, a unicellular eukaryotic green alga, has attracted much attention as a potential feedstock for renewable energy production. However, the function of DGAT1 in Chlorella has not been reported.
Results: A full-length cDNA encoding a putative diacylglycerol acyltransferase 1 (DGAT1, EC 2.3.1.20) was obtained from Chlorella ellipsoidea. The 2,142 bp open reading frame of this cDNA, designated CeDGAT1, encodes a protein of 713 amino acids showing …
Utah State University Evaluation Of Ring To Green Final Research Report, Kelly Kopp, Paul Harris
Utah State University Evaluation Of Ring To Green Final Research Report, Kelly Kopp, Paul Harris
CWEL Publications
Necrotic ring spot (Ophiosphaerella korrae) is the most commonly diagnosed fungal turfgrass disease by the Utah State University Plant Pest Diagnostic Laboratory. The disease effects coolseason grasses in the state and region, particularly Kentucky bluegrass. The necrotic ring spot (NRS) disease pathogen infects and kills turfgrass roots and crowns, resulting in the blighted appearance of turf amidst an otherwise healthy area of turf
In the late summer/fall of 2015, Utah State University (USU) began a research study of the Ring to GREEN product by GreenMaster Distributing, LLC for the control of necrotic ring spot in turfgrass. Prior to USU’s involvement, …
Restoration Of The Iconic Pando Aspen Clone: Emerging Evidence Of Recovery, Paul C. Rogers, Jody A. Gale
Restoration Of The Iconic Pando Aspen Clone: Emerging Evidence Of Recovery, Paul C. Rogers, Jody A. Gale
Aspen Bibliography
Quaking aspen (Populus tremuloides Michx.) is being stressed across the America West from a variety of sources including drought, herbivory, fire suppression, development, and past management practices. Rich assemblages of plants and animals that utilize aspen forests, as well as economic values of tourism, grazing, hunting, and water conservation, make aspen ecosystems among the most valuable vegetation types in this region. The 43-ha Pando clone near Fish Lake, Utah, is an iconic example of an aspen community undergoing rapid decline due to overstory mortality and chronic recruitment failure. As part of a larger project to restore Pando, we fenced, …
Quantifying The Impact Of Seasonal And Short-Term Manure Application Decisions On Phosphorus Loss In Surface Runoff, Peter A. Vadas, Laura Ward Good, William E. Jokela, Krishnapuram G. Karthikeyan, Francisco J. Arriaga, Melanie N. Stock
Quantifying The Impact Of Seasonal And Short-Term Manure Application Decisions On Phosphorus Loss In Surface Runoff, Peter A. Vadas, Laura Ward Good, William E. Jokela, Krishnapuram G. Karthikeyan, Francisco J. Arriaga, Melanie N. Stock
Plants, Soils, and Climate Faculty Publications
Agricultural phosphorus (P) management is a research and policy issue due to P loss from fields and water quality degradation. Better information is needed on the risk of P loss from dairy manure applied in winter or when runoff is imminent. We used the SurPhos computer model and 108 site–years of weather and runoff data to assess the impact of these two practices on dissolved P loss. Model results showed that winter manure application can increase P loss by 2.5 to 3.6 times compared with non-winter applications, with the amount increasing as the average runoff from a field increases. Increased …
Genotypic Variability In Populus Tremula L. Affects How Anthropogenic Nitrogen Enrichment Influences Litter Decomposition, Franziska Bandau, Benedicte Riber Albrectsen, Riitta Julkunen-Tiitto, Michael J. Gundale
Genotypic Variability In Populus Tremula L. Affects How Anthropogenic Nitrogen Enrichment Influences Litter Decomposition, Franziska Bandau, Benedicte Riber Albrectsen, Riitta Julkunen-Tiitto, Michael J. Gundale
Aspen Bibliography
No abstract provided.
Maintaining Ecosystem Resilience: Functional Responses Of Tree Cavity Nesters To Logging In Temperate Forests Of The Americas, Jose Tomas Ibarra, Michaela Martin, Kristina L. Cockle, Kathy Martin
Maintaining Ecosystem Resilience: Functional Responses Of Tree Cavity Nesters To Logging In Temperate Forests Of The Americas, Jose Tomas Ibarra, Michaela Martin, Kristina L. Cockle, Kathy Martin
Aspen Bibliography
Logging often reduces taxonomic diversity in forest communities, but little is known about how this biodiversity loss affects the resilience of ecosystem functions. We examined how partial logging and clearcutting of temperate forests influenced functional diversity of birds that nest in tree cavities. We used point-counts in a before-after-control-impact design to examine the effects of logging on the value, range, and density of functional traits in bird communities in Canada (21 species) and Chile (16 species). Clearcutting, but not partial logging, reduced diversity in both systems. The effect was much more pronounced in Chile, where logging operations removed critical nesting …
Guide To Quaking Aspen Ecology And Management With Emphasis On Bureau Of Land Management Lands In The Western United States, Paul C. Rogers
Guide To Quaking Aspen Ecology And Management With Emphasis On Bureau Of Land Management Lands In The Western United States, Paul C. Rogers
Aspen Bibliography
No abstract provided.
Developing A Parameterization Approach For Soil Erodibility For The Rangeland Hydrology And Erosion Model (Rhem), Osama Z. Al-Hamdan, Frederick B. Pierson, Mark A. Nearing, Christopher Jason Williams, Mariano Hernandez, Jan Boll, Sayjro K. Nouwakpo, Mark A. Weltz, Kenneth Spaeth
Developing A Parameterization Approach For Soil Erodibility For The Rangeland Hydrology And Erosion Model (Rhem), Osama Z. Al-Hamdan, Frederick B. Pierson, Mark A. Nearing, Christopher Jason Williams, Mariano Hernandez, Jan Boll, Sayjro K. Nouwakpo, Mark A. Weltz, Kenneth Spaeth
Articles
Soil erodibility is a key factor for estimating soil erosion using physically based models. In this study, a new parameterization approach for estimating erodibility was developed for the Rangeland Hydrology and Erosion Model (RHEM). The approach uses empirical equations that were developed by applying piecewise regression analysis to predict the differences of erodibility before and after disturbance (i.e., wildfire, prescribed fire, and tree encroachment) and across a wide range of soil textures as a function of vegetation cover and surface slope angle. The approach combines rain splash, sheet flow, and concentrated flow erodibilities into a single parameter for modeling erodibility …
Linking Nutrient Transport To Soil Physical Processes During Freeze/Thaw Events To Promote Wintertime Manure Management, Nutrient Use Efficiency, And Surface Water Quality., Melanie N. Stock, Francisco J. Arriaga, Peter A. Vadas, Laura Ward Good, K. G. Karthikeyan
Linking Nutrient Transport To Soil Physical Processes During Freeze/Thaw Events To Promote Wintertime Manure Management, Nutrient Use Efficiency, And Surface Water Quality., Melanie N. Stock, Francisco J. Arriaga, Peter A. Vadas, Laura Ward Good, K. G. Karthikeyan
Plants, Soils, and Climate Faculty Publications
The application of dairy manure to the landscape during winter is a longstanding practice for farms in the Midwestern United States and other temperate regions. Practical motivations behind winter spreading include affordability, availability of time, and the reduced risk of compaction from farm equipment on frozen soils. Wintertime manure applications, however, coincide with environmental conditions that are prone to runoff and accelerate nutrient losses from agricultural fields. Understanding the nutrient dynamics in response to winter-applied manure is especially important to Wisconsin, a leading state in dairy production, where up to 75% of annual runoff volumes occur on frozen and thawing …
Establishing Peach Trees For Organic Production In Utah And The Intermountain West, Jennifer R. Reeve, C. M. Culumber, Brent Black, Andrew Tebeau, Corey Ransom, Diane Alston, M. Rowley, Thor Lindstrom
Establishing Peach Trees For Organic Production In Utah And The Intermountain West, Jennifer R. Reeve, C. M. Culumber, Brent Black, Andrew Tebeau, Corey Ransom, Diane Alston, M. Rowley, Thor Lindstrom
Plants, Soils, and Climate Faculty Publications
Adequate weed control and nutrient supply are critical for successful establishment of fruit trees. This is of particular concern in organic orchard establishment. In order to determine the best approach for establishing peach trees (Prunus persica L.) organically in climates characterized by hot dry summers and cold winters such as the North American Intermountain West, seven organic and three integrated and conventional treatment combinations were established in two first leaf orchards at the USU Kaysville Research Farm, Utah, in 2008 and 2009. Treatments consisted of different tree-row and alleyway mulch and fertilizer combinations. Compost or conventional fertilizer (16-16-16 and …
The Optical Trapezoid Model: A Novel Approach To Remote Sensing Of Soil Moisture Applied To Sentinel-2 And Landsat-8 Observations, Morteza Sadeghi, Ebrahim Babaeian, Markus Tuller, Scott B. Jones
The Optical Trapezoid Model: A Novel Approach To Remote Sensing Of Soil Moisture Applied To Sentinel-2 And Landsat-8 Observations, Morteza Sadeghi, Ebrahim Babaeian, Markus Tuller, Scott B. Jones
Plants, Soils, and Climate Faculty Publications
The “trapezoid” or “triangle” model constitutes the most popular approach to remote sensing (RS) of surface soil moisture based on coupled thermal (i.e., land surface temperature) and optical RS observations. The model, hereinafter referred to as Thermal-Optical TRAapezoid Model (TOTRAM), is based on interpretation of the pixel distribution within the land surface temperature - vegetation index (LST-VI) space. TOTRAM suffers from two inherent limitations. It is not applicable to satellites that do not provide thermal data (e.g., Sentinel-2) and it requires parameterization for each individual observation date. To overcome these restrictions we propose a novel OPtical TRApezoid Model (OPTRAM), which …
Influence Of Mature Overstory Trees On Adjacent 12-Year Regeneration And The Woody Understory: Aggregated Retention Versus Intact Forest, Miranda T. Curzon, Susan C. Baker, Christel C. Kern, Brian J. Palik, Anthony W. D'Amato
Influence Of Mature Overstory Trees On Adjacent 12-Year Regeneration And The Woody Understory: Aggregated Retention Versus Intact Forest, Miranda T. Curzon, Susan C. Baker, Christel C. Kern, Brian J. Palik, Anthony W. D'Amato
Aspen Bibliography
No abstract provided.
Assessment Of Aspen Ecosystem Vulnerability To Climate Change For The Uinta-Wasatch- Cache And Ashley National Forests, Utah, Janine Rice, Tim Bardsley, Pete Gomben, Dustin Bambrough, Stacey Weems, Allen Huber, Linda A. Joyce
Assessment Of Aspen Ecosystem Vulnerability To Climate Change For The Uinta-Wasatch- Cache And Ashley National Forests, Utah, Janine Rice, Tim Bardsley, Pete Gomben, Dustin Bambrough, Stacey Weems, Allen Huber, Linda A. Joyce
Aspen Bibliography
No abstract provided.
Can Carbon Fluxes Explain Differences In Soil Organic Carbon Storage Under Aspen And Conifer Forest Overstories?, Antra Boca, Helga Van Miegroet
Can Carbon Fluxes Explain Differences In Soil Organic Carbon Storage Under Aspen And Conifer Forest Overstories?, Antra Boca, Helga Van Miegroet
Aspen Bibliography
No abstract provided.
Climatic Sensitivity Of A Mixed Forest Association Of White Spruce And Trembling Aspen At Their Southern Range Limit, Sophan Chhin, G. Geoff Wang
Climatic Sensitivity Of A Mixed Forest Association Of White Spruce And Trembling Aspen At Their Southern Range Limit, Sophan Chhin, G. Geoff Wang
Aspen Bibliography
No abstract provided.
Aspen Health On National Forests In The Northern Rocky Mountain Region, James T. Blodgett, Kurt K. Allen, Kendra Schotzko, Al Dymerski
Aspen Health On National Forests In The Northern Rocky Mountain Region, James T. Blodgett, Kurt K. Allen, Kendra Schotzko, Al Dymerski
Aspen Bibliography
No abstract provided.
Post-Glacial Biogeography Of Trembling Aspen Inferred From Habitat Models And Genetic Variance In Quantitative Traits, Chen Ding, Stefan G. Schreiber, David R. Roberts, Andreas Hamann, Jean S. Brouard
Post-Glacial Biogeography Of Trembling Aspen Inferred From Habitat Models And Genetic Variance In Quantitative Traits, Chen Ding, Stefan G. Schreiber, David R. Roberts, Andreas Hamann, Jean S. Brouard
Aspen Bibliography
No abstract provided.