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2017

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Articles 301 - 330 of 343

Full-Text Articles in Forest Sciences

Polyphenols In Northern Hungarian Mentha Longifolia (L.) L. Treatedwith Ultrasonic Extraction For Potential Oenological Uses, Katalin Patonay, Marietta Korozs, Zoltan Muranyi, Erika Pénzesné Kónya Jan 2017

Polyphenols In Northern Hungarian Mentha Longifolia (L.) L. Treatedwith Ultrasonic Extraction For Potential Oenological Uses, Katalin Patonay, Marietta Korozs, Zoltan Muranyi, Erika Pénzesné Kónya

Turkish Journal of Agriculture and Forestry

The main objective of this study is to investigate three equalized batches of a wild Mentha longifolia (ML) population from northern Hungary for extractability by gentle ultrasonic extraction, antioxidant activity, and phenolic constituents. This is the first analytical investigation in a Hungarian population of this species. Antioxidant properties of ML extracts were evaluated with DPPH, photochemiluminescence-O2-. scavenging assay, FRAP, and total polyphenol measurements. HPLC-DAD determination was performed for the main phenolic constituents. The extracts are medium or strong antioxidants in DPPH and FRAP assays and show strong O2-? scavenging capacity. Rutin, quercetin, kaempferol, apigenin, naringenin, rosmarinic, vanillic, gallic, syringic, caffeic, …

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Selected Engineering Properties Of Tiger Nut As A Function Of Moisture Content And Variety, Ahmet İnce, Kubi̇lay Kazim Vursavuş, Yasemi̇n Vurarak, Pinar Çubukcu, Meli̇h Yavuz Çevi̇k Jan 2017

Selected Engineering Properties Of Tiger Nut As A Function Of Moisture Content And Variety, Ahmet İnce, Kubi̇lay Kazim Vursavuş, Yasemi̇n Vurarak, Pinar Çubukcu, Meli̇h Yavuz Çevi̇k

Turkish Journal of Agriculture and Forestry

Some physical and mechanical properties of two tiger nut varieties (Sarışeker and Balyumru) were determined at four moisture contents. Physical properties including length, width, thickness, geometric mean diameter, mass, 1000-tuber mass, bulk density, tuber density, surface area, terminal velocity, angle of repose, porosity, and friction coefficient were affected by moisture content at a 1% probability level, excluding sphericity. All parameters decreased with a decrease in moisture content except tuber density, porosity, and firmness. Variety only had a statistically significant effect on width, geometric mean diameter surface area, and terminal velocity at different probability levels. Force, deformation, firmness, energy absorbed, and …

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Establishment Of American Chestnuts On Surface Mined Lands In Appalachian Coalfields Region, Michael E. French Jan 2017

Establishment Of American Chestnuts On Surface Mined Lands In Appalachian Coalfields Region, Michael E. French

Theses and Dissertations--Forestry and Natural Resources

American chestnut (Castanea dentata (Marsh.) Borkh.) was an dominant hardwood throughout eastern North America until the introduction of an exotic fungus (Cryphonectria parasitica (Murr.) Barr) in the early 20th century devastated American chestnut populations. Chestnuts that have been bred for blight resistance have recently become available for testing. Due to the overlap of American chestnut’s natural range and the Appalachian coalfields region, the potential establishment of founder populations of blight-resistant chestnuts on reclaimed coal surface mines has recently gained attention. This work examined chestnut establishment on a surface mine in eastern Kentucky to assess factors controlling early …

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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 Jan 2017

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.

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Can Carbon Fluxes Explain Differences In Soil Organic Carbon Storage Under Aspen And Conifer Forest Overstories?, Antra Boca, Helga Van Miegroet Jan 2017

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.

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Natural Dissemination Of Hypovirulent Cryphonectria Parasiticastrain Used For Biological Control Of Chestnut Blight, Naci̇ye Mükerrem Çeli̇ker, Cevdet Kaplan, Emi̇n Ersi̇n Onoğur, Barbaros Çeti̇nel, Di̇lek Poyraz, Ayşe Uysal Jan 2017

Natural Dissemination Of Hypovirulent Cryphonectria Parasiticastrain Used For Biological Control Of Chestnut Blight, Naci̇ye Mükerrem Çeli̇ker, Cevdet Kaplan, Emi̇n Ersi̇n Onoğur, Barbaros Çeti̇nel, Di̇lek Poyraz, Ayşe Uysal

Turkish Journal of Agriculture and Forestry

Chestnut blight, caused by Cryphonectria parasitica Murr. Barr, is the most serious disease of chestnut trees in Turkey on which several studies related to biological control were conducted. The aim of this study was to determine the cause of the occurrence of healing cankers on untreated chestnut trees and the role of carriers in the spread of hypovirulence by laboratory tests, and to discover the effect of some environmental factors (temperature and relative humidity) on the natural spreading of hypovirulence. The study was carried out in a chestnut grove where biological control studies of the disease had been performed in …

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Some Growth And Chlorophyll Fluorescence Parameters Of Black And Hybrid Poplar Clones Under Water Stress, Akkin Semerci̇, Nuran Çi̇çek, Fai̇k Alpteki̇n Karahan, Ercan Özyürek, Yeli̇z Kaşko Arici, Yasemi̇n Ekmekçi̇ Jan 2017

Some Growth And Chlorophyll Fluorescence Parameters Of Black And Hybrid Poplar Clones Under Water Stress, Akkin Semerci̇, Nuran Çi̇çek, Fai̇k Alpteki̇n Karahan, Ercan Özyürek, Yeli̇z Kaşko Arici, Yasemi̇n Ekmekçi̇

Turkish Journal of Agriculture and Forestry

The effects of water stress on some growth and chlorophyll a fluorescence parameters were investigated in two native black poplar (Populus nigra L.) clones (Kocabey and Gazi) and in two hybrid poplar (Populus × euramericana (Dode) Guinier) clones (I-214 and I-45/51) to determine which among the four clones is the best adapted to water-stress conditions. The potted seedlings were grown under three watering regimes. As a result of the applied watering regimes, the predawn water potential (ψ pd) of seedlings was maintained at about -0.3, -0.9, and -1.6 MPa in control, moderate, and severe water-stress treatments during the experiment, respectively. …

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The Effects Of Different Plant Densities And Silage Corn Varieties On Silage Yield And Some Yield Parameters In No-Till Seeding, Mehmet Zahi̇d Malasli, Ali̇ Khatami̇, Ahmet Çeli̇k Jan 2017

The Effects Of Different Plant Densities And Silage Corn Varieties On Silage Yield And Some Yield Parameters In No-Till Seeding, Mehmet Zahi̇d Malasli, Ali̇ Khatami̇, Ahmet Çeli̇k

Turkish Journal of Agriculture and Forestry

In this study, the possibility of growing silage corn, which is used as an important nutrient in livestock and whose production is increasing in recent years, by no-till seeding method under Erzurum conditions was investigated. For this purpose, three silage corn varieties (DKC-5783, Prestige, and ADA-9510) suitable for Erzurum's climatic conditions in terms of vegetation period were selected from a large number of silage corn seeds widely grown throughout Turkey and their development conditions under no-till seeding conditions were investigated. A precision vacuum no-till seeder with double disk type furrow opener was used for silage corn seeding. Based on three …

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Are Weevils Picky Eaters? Community Structure And Host Specificity Of Neotropical Saproxylic Beetles (Coleoptera: Curculionidae), Jhunior A. Morillo Jan 2017

Are Weevils Picky Eaters? Community Structure And Host Specificity Of Neotropical Saproxylic Beetles (Coleoptera: Curculionidae), Jhunior A. Morillo

Dissertations and Theses

Abstract Primary saproxylic beetles play a major role in forest nutrient cycling and making deadwood accessible to other decomposers. Understanding beetle host preferences and patterns of community assembly is critical for their conservation, and for predicting which species might become invasive. This project aims to investigate the ecological and host specificity, as well as the community composition of curculionids in a mosaic of old-growth (OG) and secondary forest on the Osa Peninsula, Costa Rica. The subfamily Scolytinae was expected to be the most species-rich and abundant. Ambrosia beetles were expected to have more generalist species than other curculionids. Old growth …

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Effects Of Post-Fire Salvage Logging On Compaction, Infiltration, Water Repellency, And Sediment Yield And The Effectiveness Of Subsoiling On Skid Trails, Iskender Demirtas Jan 2017

Effects Of Post-Fire Salvage Logging On Compaction, Infiltration, Water Repellency, And Sediment Yield And The Effectiveness Of Subsoiling On Skid Trails, Iskender Demirtas

Dissertations, Master's Theses and Master's Reports

Post-fire salvage logging operations can induce environmental problems. This study assessed the effects of different disturbances from post-fire salvage logging on soil bulk density, water repellency, field saturated hydraulic conductivity (Kfs), ground cover, and sediment yields after the 2013 Rim Fire in California. Hillslope plots were installed in three locations (Sawmill, lower Femmons, and upper Femmons). The plot-scale disturbances were burned and untrafficked (low and high slope controls and logged only with no traffic), or burned and trafficked (few and many pass skid trails). Additional measurements were made in nearby areas that included the plot-scale disturbances as well as feller …

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Effects Of Group Selection With Yellow Birch (Betula Alleghaniensis) Retention On The Understory And Sapling Layer In Northern Hardwood Forests, Megan A. Petras O'Neil Jan 2017

Effects Of Group Selection With Yellow Birch (Betula Alleghaniensis) Retention On The Understory And Sapling Layer In Northern Hardwood Forests, Megan A. Petras O'Neil

Dissertations, Master's Theses and Master's Reports

Gap partitioning theory predicts that changes in microenvironment conditions found within a forest opening promote diversity in forest ecosystems. Under this theory we would expect to see variations in tree and understory diversity throughout and surrounding a forest opening. In order to test this theory, we examined manmade openings with legacy-tree retention in a northern hardwood forest located in the Upper Peninsula of Michigan. This work is part of an ongoing study that was started in 2003 with the creation of 49 openings centered on a reserve dominant or co-dominant yellow birch (Betula alleghaniensis Britt.). The primary objective of …

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Models Of Forest Inventory For Istanbul Forest Using Airborne Lidar And Spaceborne Imagery, Mustafa Kagan Ozkal Jan 2017

Models Of Forest Inventory For Istanbul Forest Using Airborne Lidar And Spaceborne Imagery, Mustafa Kagan Ozkal

Dissertations, Master's Theses and Master's Reports

Active remote sensing technology (LiDAR) and passive remote sensing technology (Pleiades and Göktürk-2 satellites) were used to find a meaningful relationship between ground data and remote sensing instruments for Istanbul Forest, Turkey. Two dominant species in the field, oak (deciduous trees) and maritime pine (coniferous trees), were researched. There were 86 plots total, 41 for maritime pine and 45 for oak. Three diameter at breast height (DBH) thresholds were studied. Trees of any DBH (DBH≥0.1 cm), trees ≥8 cm DBH thresholds and, trees ≥10 cm DBH thresholds. Both satellite image metrics were derived from Grey Level Co-occurrence Measures (GLCM). All …

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Development Of Gene-Based Microsatellite Markers In Acer Saccharum Marsh., Monica Harmon Jan 2017

Development Of Gene-Based Microsatellite Markers In Acer Saccharum Marsh., Monica Harmon

Dissertations, Master's Theses and Master's Reports

Sugar maple (Acer saccharum Marsh) is an important ecological and economic resource. Despite its significance, there are few molecular genetic resources available to date. This study used previously developed EST libraries generated for sugar maple and other hardwood species to develop and characterize EST-SSRs in sugar maple and test their transferability to other Acer species. Out of 58 markers tested, 22 showed amplification in the expected size range. From these, 16 polymorphic markers were selected to test transferability and 13 of these showed amplification in at least one other Acer species.

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Effects Of Partial Dehydration Techniques On The Metabolite Compositionin 'Refosk' Grape Berries And Wine, Maja Mikulic Petkovsek, Tjasa Jug, Jan Rescic, Denis Rusjan Jan 2017

Effects Of Partial Dehydration Techniques On The Metabolite Compositionin 'Refosk' Grape Berries And Wine, Maja Mikulic Petkovsek, Tjasa Jug, Jan Rescic, Denis Rusjan

Turkish Journal of Agriculture and Forestry

The aim of the study was to investigate the impact of the on-vine double maturation raisonnée (DMR) and off-vine berry partial dehydration in the chamber (PDC) on the chemical characteristics of the grape and wine grapevine cultivar 'Refosk'. A liquid chromatography-mass spectrometry (LC-MS) system was used for the identification and quantification of phenolics and the HPLC for sugars and organic acids. Berries subjected to DMR partial dehydration reached technological maturity (18.5 °Brix) within 14 days of cane cutting and those under PDC in 22 days upon harvest. The greatest decline in berry weight was recorded in the PDC treatment (14%), …

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Tree-Induced Changes In A Terra Rossa Soil Under Olive.Observations From An Integrated Field Study, Salvatore Madrau, Claudio Zucca, İhsan Akşi̇t, Zülküf Kaya, Seli̇m Kapur Jan 2017

Tree-Induced Changes In A Terra Rossa Soil Under Olive.Observations From An Integrated Field Study, Salvatore Madrau, Claudio Zucca, İhsan Akşi̇t, Zülküf Kaya, Seli̇m Kapur

Turkish Journal of Agriculture and Forestry

A range of indicators including chemical, physical, morphological, and clay mineral properties were investigated to support an integrated evaluation of the changes induced by a long established olive grove on a red Mediterranean soil. The study area was located in Sardinia (Italy). Two soil profiles were studied in a site where land use had remained unchanged for the previous 150 years: one under the canopy and around the trunk of an olive tree and one between the trees. Chemical analyses including organic matter fractions were performed by horizon. Undisturbed soil samples were collected from aggregates for thin section and scanning …

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Effect Of Irrigation Regimes On Carbon Isotope Discrimination, Yield And Irrigation Water Productivity Of Wheat, Sema Kale, Bülent Sönmez, Sevi̇nç Madenoğlu, Kadri̇ Avağ, Ufuk Türker, Gökhan Çayci, Ali̇ Ci̇hat Kütük Jan 2017

Effect Of Irrigation Regimes On Carbon Isotope Discrimination, Yield And Irrigation Water Productivity Of Wheat, Sema Kale, Bülent Sönmez, Sevi̇nç Madenoğlu, Kadri̇ Avağ, Ufuk Türker, Gökhan Çayci, Ali̇ Ci̇hat Kütük

Turkish Journal of Agriculture and Forestry

The present research study was carried out during the years 2009-2010 and 2010-2011 to identify the relationship between carbon isotope discrimination (δ) of grain and leaf, yield of winter wheat, and irrigation water productivity (IWP) under different water conditions in a semiarid climate. The field experiments were conducted with four different irrigation treatments (I1: rainfed: I2: irrigate when calculated soil water depletion is 60 mm below field capacity (full irrigation); I3: two irrigations maximum, one at tillering and another at grain filling; I4: no irrigation after establishment until heading, after which irrigate when soil water depletion is 60 mm below …

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Effect Of Sulphuring On Physicochemical Characteristics Andaroma Of Dried Alkaya Apricot: A New Turkish Variety, Letizia Inserra, Turgut Cabaroğlu, Kemal Şen, Elena Arena, Gabriele Ballistreri, Biagio Fallico Jan 2017

Effect Of Sulphuring On Physicochemical Characteristics Andaroma Of Dried Alkaya Apricot: A New Turkish Variety, Letizia Inserra, Turgut Cabaroğlu, Kemal Şen, Elena Arena, Gabriele Ballistreri, Biagio Fallico

Turkish Journal of Agriculture and Forestry

Sulphured and unsulphured sun-dried apricots of Alkaya, a new variety of Prunus armeniaca L. grown in the Malatya region of Turkey, were compared to study the effects of sulphur treatment on their physicochemical characteristics and aroma compounds. Colour, texture, moisture, pH, total soluble solids, sugars, organic acids, and 5-hydroxymethyl furfural contents were determined. Aroma compounds were quantified and identified by GC-MS-FID. Sulphuring treatment before sun-drying had significant effects on some physicochemical properties (pH, titratable acidity, total acids, and colour parameters) and aroma compounds of Alkaya apricots. Colour parameters showed that browning was higher in the unsulphured apricots than in the …

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Characterization Of Morphological Traits Of Local And Globalpersimmon Varieties And Genotypes Collected From Turkey, Bi̇lge Yilmaz, Ayli̇n Genç, Berken Çi̇men, Meral İncesu, Turgut Yeşi̇loğlu Jan 2017

Characterization Of Morphological Traits Of Local And Globalpersimmon Varieties And Genotypes Collected From Turkey, Bi̇lge Yilmaz, Ayli̇n Genç, Berken Çi̇men, Meral İncesu, Turgut Yeşi̇loğlu

Turkish Journal of Agriculture and Forestry

Genetic variations are highly important in terms of plant breeding. These variations occur either spontaneously or artificially by mutations and sexual hybridizations in order to achieve specific breeding objectives. In this study, persimmon genetic resources collected from Turkey and preserved ex situ with commercial cultivars in a germplasm orchard located at Çukurova University, Turkey, were characterized based on their morphological traits. The collection was composed of traditional genotypes and local accessions together with global varieties. For the morphological characterization, 59 morphological and agronomic traits were investigated: 9 related to plant growth, 5 to leaf characteristics, 7 to flower traits, 32 …

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Distribution Of Quercus Spp. And Pinus Nigra Mixed Standsin Semiarid Northern Central Anatolia, Gülzade Kahveci̇ Jan 2017

Distribution Of Quercus Spp. And Pinus Nigra Mixed Standsin Semiarid Northern Central Anatolia, Gülzade Kahveci̇

Turkish Journal of Agriculture and Forestry

Central Anatolia has semiarid ecological conditions that limit tree growth. In addition, long-term human activity has resulted in degradation of existing forests lands. Current forest cover mainly includes oak, juniper, and pine species. In this study, the distribution and present state of Pinus nigra L. and Quercus spp. (Quercus cerris L. and Quercus pubescens L.) mixed stands, and the relationship between different environmental factors and abundance of oaks and pines were analyzed. The results indicate that interactions of environmental variables and human disturbance may have influenced the frequency and abundance of species in the region.

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Afforestation Of Arid And Semiarid Ecosystems In Turkey, Servet Çalişkan, Meli̇h Boydak Jan 2017

Afforestation Of Arid And Semiarid Ecosystems In Turkey, Servet Çalişkan, Meli̇h Boydak

Turkish Journal of Agriculture and Forestry

Sustainable management of arid and semiarid forests requires careful planning and implementation. Afforestation by planting and seeding is a fundamental tool for the establishment of new forests on barren landscapes and restoration of degraded forests in arid and semiarid ecosystems. In afforestation efforts, the consideration of site preparation, selection of species, seed source, and planting methods pose a number of ecological and economic challenges. Possessing one of the world's richest floras, Turkey suffered from heavy degradation during the last millennia. Some studies suggested that forests and steppes once covered 60%-70% and 10%-15% of the Anatolian landscape, respectively. Growing population, overgrazing, …

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Diversity And Genetic Analysis Through Dartseq In Common Bean(Phaseolus Vulgaris L.) Germplasm From Turkey, Seda Nemli̇, Tansel Kaygisiz Aşçioğul, Duygu Ateş, Dursun Eşi̇yok, Muhammed Bahatti̇n Tanyolaç Jan 2017

Diversity And Genetic Analysis Through Dartseq In Common Bean(Phaseolus Vulgaris L.) Germplasm From Turkey, Seda Nemli̇, Tansel Kaygisiz Aşçioğul, Duygu Ateş, Dursun Eşi̇yok, Muhammed Bahatti̇n Tanyolaç

Turkish Journal of Agriculture and Forestry

The common bean (Phaseolus vulgaris L.) is the most consumed food legume in the world and is a major source of dietary protein, carbohydrates, and valuable micronutrients, especially in developing countries. Diversity Arrays Technology (DArTseq), based on genome reduction with restriction enzymes, provides a rapid, high-throughput, and cost-effective tool capable of generating thousands of genotyped single nucleotide polymorphisms (SNPs) for a genome-wide analysis of genetic diversity. In this study, we aimed to characterize common bean accessions using SNPs detected by a DArTseq approach. A total of 43,018 SNPs were identified from 173 common bean accessions, including Andean and Mesoamerican genotypes. …

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The Effects Of Early Pruning On The Near-Ground Branch Density Of Four Live Fencing Species, Aric Devens Jan 2017

The Effects Of Early Pruning On The Near-Ground Branch Density Of Four Live Fencing Species, Aric Devens

Dissertations, Master's Theses and Master's Reports

Crop losses in home gardens greatly impact the wellbeing of rural West African families. Herbivory by migratory or local livestock represents a significant source of crop loss. Live-fencing gardens with thorny hedges is a low-cost and sustainable strategy for reducing losses due to herbivory. However, guidance on the establishment of thorny hedges is inconsistent, poorly publicized, and often anecdotal. Therefore, this study evaluated the effects of three early pruning treatments on near-ground branch density of four thorny species: Vachellia nilotica, Senegalia laeta, Senegalia mellifera, and Prosopis juliflora. Physical measurements and photographic data indicated that after one growing season, V. …

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The Effects Of Disturbance And Species Specific Interactions On Diversity In An Agent Based Forest Simulation, Matthew E. Mills Jan 2017

The Effects Of Disturbance And Species Specific Interactions On Diversity In An Agent Based Forest Simulation, Matthew E. Mills

Theses and Dissertations

In ecology literature, there is much data which suggests that conspecific negative density dependence (CNDD) and abiotic disturbances increase biodiversity in forests. This thesis elucidates the notion that not only do these two forces increase diversity, but they may also interact with one another in order to achieve higher levels of biodiversity. Abiotic disturbances, like fires and hurricanes, can indirectly impact conspecific effects because when these forces remove individuals from the landscape, the role of the conspecific effects will change. The interaction of these two factors in biodiversity are explored in an agent based forest simulation through a resource surface. …

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Interview With Ted Lorensen, Ted Lorensen, Lloyd Chapman, James B. Knight, Michael Rupp Jan 2017

Interview With Ted Lorensen, Ted Lorensen, Lloyd Chapman, James B. Knight, Michael Rupp

People and the Land: An Oral History of Oregon’s Statewide Land Use Planning Program

Ted Lorensen was interviewed by Michael Rupp, Lloyd Chapman, and Jim Knight on October 20, 2017, in Portland, Oregon.

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Climatic Sensitivity Of A Mixed Forest Association Of White Spruce And Trembling Aspen At Their Southern Range Limit, Sophan Chhin, G. Geoff Wang Jan 2017

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.

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Aspen Health On National Forests In The Northern Rocky Mountain Region, James T. Blodgett, Kurt K. Allen, Kendra Schotzko, Al Dymerski Jan 2017

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.

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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 Jan 2017

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.

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Quaking Aspen In The Northern Rockies Retention And Restoration, Camille Stevens-Rumann, Penelope Morgan, Eva Strand, Diane Abendroth Jan 2017

Quaking Aspen In The Northern Rockies Retention And Restoration, Camille Stevens-Rumann, Penelope Morgan, Eva Strand, Diane Abendroth

Aspen Bibliography

No abstract provided.

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Structural Integrity And Physical Properties Of Ponderosa Pine Over Time After Death Between Vectors Of Mortality, Edward J. O'Donnell Jan 2017

Structural Integrity And Physical Properties Of Ponderosa Pine Over Time After Death Between Vectors Of Mortality, Edward J. O'Donnell

Graduate Student Theses, Dissertations, & Professional Papers

In an era of accelerated climate change, with persistent and increasing disturbance on our landscapes it is important to increase our knowledge of how these natural disturbances effect our lands. This study investigated the changes that take place in ponderosa pine (Pinus ponderosa) stems after death when killed by mountain pine beetle (Dendroctonus ponderosae) and by fire. Trees killed by mountain pine beetle as well as trees killed by fire were sampled and separated into two age classes, those dead 0-4 years and those dead 4+ years. Data was gathered on the modulus of rupture, modulus …

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Molecular Diversity Of Foliar Fungal Endophytes In Relation To Defense Strategies And Disease In Whitebark Pine, Lorinda Bullington Jan 2017

Molecular Diversity Of Foliar Fungal Endophytes In Relation To Defense Strategies And Disease In Whitebark Pine, Lorinda Bullington

Graduate Student Theses, Dissertations, & Professional Papers

An invasive fungal pathogen, Cronartium ribicola (the causative agent of white pine blister rust) infects and kills whitebark pine (Pinus albicaulis) throughout the western US. Blister rust has decreased whitebark pine populations by over 90% in some areas. Whitebark pine, a keystone species, has been proposed for listing under the Endangered Species Act in the U.S., and the loss of this conifer is predicted to have severe impacts on forest composition and function in high elevations. Hundreds of asymptomatic fungal species live inside whitebark pine tissue, and recent studies suggest that these fungi can influence the frequency and …

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