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Full-Text Articles in Life Sciences
Antioxidant, Antidiabetic, And Antihypertensive Effects Of Peptides From Some Quercus Species, Muhammed Yusuf Çağlar, Muhammet Arici
Antioxidant, Antidiabetic, And Antihypertensive Effects Of Peptides From Some Quercus Species, Muhammed Yusuf Çağlar, Muhammet Arici
Turkish Journal of Agriculture and Forestry
In the present study, the antihypertensive, antidiabetic, and antioxidant properties of oak peptides were determined in vitro. For this purpose, samples from most common oak species (Quercus coccifera, Quercus ilex, and Quercus cerris) were collected, the proteins were extracted and the bioactive properties of 48 different peptide fractions were monitored using a fast protein liquid chromatography. The results showed that acorn peptides had no remarkable antioxidant or antihypertensive effects. Comparing the bioactive peptides of all oak species, the peptides of Q. coccifera generally had higher DPP-IV inhibition activity than those of Q. cerris and Q. ilex. …
The Role Of Leaf Decomposition In Macroinvertebrate Colonization, Bethany Mabel Lian Schorr, Kevin Geedey
The Role Of Leaf Decomposition In Macroinvertebrate Colonization, Bethany Mabel Lian Schorr, Kevin Geedey
Independent Research Projects
Decomposition plays an important ecological role in carbon and nutrient cycling that supply food and energy resources to food webs. This study investigates the potential role that leaf decomposition of different leaf species may play in macroinvertebrate assemblages in upper Midwest streams. We hypothesized that the different decomposition rates experienced with different leaf species and in different streams would have an effect on invertebrate colonization due to the variance in nutrient availability. Due to altered fire regimes and other influences, forests are experiencing declines in fire-adapted, heliophytic species such as oaks and compositional shifts toward shade-tolerant, mesophytic species such as …
Historical Population Increases And Related Inciting Factors Of Agrilus Anxius, Agrilus Bilineatus, And Agrilus Granulatus Liragus (Coleoptera: Buprestidae) In The Lake States (Michigan, Minnesota, And Wisconsin), Robert A. Haack, Toby Petrice
Historical Population Increases And Related Inciting Factors Of Agrilus Anxius, Agrilus Bilineatus, And Agrilus Granulatus Liragus (Coleoptera: Buprestidae) In The Lake States (Michigan, Minnesota, And Wisconsin), Robert A. Haack, Toby Petrice
The Great Lakes Entomologist
Three native species of tree-infesting Agrilus have regularly reached outbreak levels in the Lake States (Michigan, Minnesota, and Wisconsin), including A. anxius Gory (bronze birch borer), A. bilineatus (Weber) (twolined chestnut borer), and A. granulatus liragus Barter & Brown (bronze poplar borer). The main host trees for these Agrilus are species of Betula for A. anxius, Castanea and Quercus for A. bilineatus, and Populus for A. granulatus liragus. Based on 197 annual forest health reports for Michigan (1950–2017, 66 years), Minnesota (1950–2017, 64 years), and Wisconsin (1951–2017, 67 years), A. bilineatus was the most often reported Agrilus …
Seed And Seedling Data From Sugarcreek Metropark Restoration Experiment, Michaela J. Woods, Meredith Cobb, Ryan W. Mcewan
Seed And Seedling Data From Sugarcreek Metropark Restoration Experiment, Michaela J. Woods, Meredith Cobb, Ryan W. Mcewan
Five Rivers MetroParks Collaboration Data Archive
This dataset encompasses information following seed germination and seedling growth of three tree species: Quercus rubra, Juglans cinerea, and Carya laciniosa. Seed sizes were recorded prior to incubation in sand, vermiculite, or without media. Seeds were then germinated with time to germination recorded in this dataset. After germination, seedlings were planted in Sugarcreek Metropark in either fall 2011 or spring 2012. One-half of seedlings were planted in tree tubes and a half without. Seedling height and diameter was recorded in June 2014 and March 2019, and death of seedlings was noted.
Ecological And Economic Implications Of Establishing Quercus Spp. In The Urban Environment, Tierney Bocsi
Ecological And Economic Implications Of Establishing Quercus Spp. In The Urban Environment, Tierney Bocsi
Masters Theses
As urban greening efforts continue, it is important to assess whether decisions to intensify street tree planting are meeting intended goals of improving urban canopy cover and increasing ecosystem services. Benefits of the urban forest take many forms, from ecological and economic to social and cultural, and are frequently cited in support of street tree planting. However, it is unknown to what extent factors such as species or nursery production method affect the ability of trees to successfully establish and provide ecosystem services in the urban environment. Using a system of oak trees planted along roads in South Amherst, Massachusetts …
Aspect Influence On Productivity When Applying The Deferment Harvest Method In Mixed-Oak Hardwood Forests In West Virginia, Breanne Held
Aspect Influence On Productivity When Applying The Deferment Harvest Method In Mixed-Oak Hardwood Forests In West Virginia, Breanne Held
Graduate Theses, Dissertations, and Problem Reports
The deferment harvest method is a new forest management treatment in central Appalachian hardwood forests. It is intended to primarily improve aesthetics by leaving select residual trees in the forest stand beyond the establishment of the regeneration cohort. However, there are concerns with residual tree quality due to the development of epicormic branches and if the presence of forest canopy influences the species composition and development of the regeneration. Topographic aspect can influence differences in productivity in both the residual and regeneration cohorts. This study examined if residual tree quality for timber value and a desirable species composition of the …
Vegetation Response To Repeated Prescribed Burning And Varied Wildfire Severity In Upland Forests On The Cumberland Plateau, Kentucky, Zachary W. Poynter
Vegetation Response To Repeated Prescribed Burning And Varied Wildfire Severity In Upland Forests On The Cumberland Plateau, Kentucky, Zachary W. Poynter
Theses and Dissertations--Forestry and Natural Resources
As a result of decades of fire suppression, oaks (Quercus L.) and other disturbance-dependent tree species are experiencing widespread regeneration failure. Today, fire takes the form of relatively low to moderate intensity prescribed fire, used to restore fire adapted ecosystems, and wildfires which often vary in severity. I investigated long-term changes to forest structure and composition in response to repeated prescribed burning followed by an extended period of no fire. Burning reduced total basal area, midstory stem density and sapling stem density. However, the fire-free interval significantly increased sapling layer stem densities of oaks and competitor species. This research …
Mineralogical And Micromorphological Characteristics Of Red Pineand Oak Root Zone Soils In Southern Turkey, Somayyeh Razzaghi, Nadia Vignozzi, Selim Kapur
Mineralogical And Micromorphological Characteristics Of Red Pineand Oak Root Zone Soils In Southern Turkey, Somayyeh Razzaghi, Nadia Vignozzi, Selim Kapur
Turkish Journal of Agriculture and Forestry
Plant species exert differential effects on soil mineralogical and micromorphological characteristics. The effect of red pine and oak tree roots on the mineralogical and micromorphological characteristics of rhizosphere soils in two sampling sites in the Göksu catchment was studied. The climate, topography, and bedrock conditions were kept consistent, whereas the plant factor was kept as the only variable in each site. Rhizosphere soils under the canopies of 100 years old and naturally occurring trees were compared via macromorphology, submicroscopy, mineralogy, and physical and chemical properties. The soils of red pine (RP1 and RP2 profiles) were determined to have higher porosity …
Effects Of Different Silvicultural Practices On Wild Turkey Brood Habitat And Regeneration In Upland Hardwoods, John Michael Mccord
Effects Of Different Silvicultural Practices On Wild Turkey Brood Habitat And Regeneration In Upland Hardwoods, John Michael Mccord
Masters Theses
Optimum brood cover for wild turkeys is composed of herbaceous cover <0.5 m tall that conceals poults from predators and allows travel underneath. On tracts of hardwoods where early succession stages and young forest cover are scarce, a lack of understory development can limit turkey populations. Additionally, retaining oak on these sites after logging or habitat enhancement is important to provide future timber value and hard mast. I compared the effects of silvicultural practices (multiple fires [F], shelterwood cutting [S], shelterwood cutting with one fire [SF], retention cutting [R], retention cutting with multiple fires [RF], retention cutting with herbicide application [RH], and retention cutting with herbicide application and multiple fires [RHF]) with controls (C) on wild turkey brood habitat and oak regeneration in upland central hardwood stands. I measured structure and food resources to quantify the quality of wild turkey brood cover. Shelterwood and retention cuts increased photosynthetically active radiation. However, herbaceous, vine, and bramble groundcover did not increase. Woody regeneration was greater following canopy reduction and understory disturbance compared to C. Disturbance (fire or herbicide) was required to maintain vegetation at the ideal height for wild turkey broods. Soft mast production increased after canopy reduction with and without fire. Invertebrate biomass did not increase following any treatment, but availability exceeded the dietary requirements of a wild turkey brood. I also counted stem density of oak and competitor regeneration in response to these treatments. Seedlings <12.7 cm were ephemeral. S and SF had a greater density of oak stems >1.4 m than C and F. However, S and SF also had the greatest density of oak >1.4 m prior to treatment. Canopy reduction increased oak competitors, but prescribed fire reduced competitors. I recommend canopy reduction, followed by repeated low-intensity prescribed fire to maintain low groundcover to enhance brood habitat for wild turkeys in mature closed-canopy upland hardwood stands.
Sp676 Oak Shelterwood - A Technique To Improve Oak Regeneration, The University Of Tennessee Agricultural Extension Service
Sp676 Oak Shelterwood - A Technique To Improve Oak Regeneration, The University Of Tennessee Agricultural Extension Service
Forestry, Trees, and Timber
The oak shelterwood method has been developed to enhance the regeneration potential of oaks growing on intermediate and high-quality sites. The method involves a welltimed mid-story removal to improve the number and vigor of oak advance regeneration and a subsequent overstory removal to facilitate regeneration of the stand.
Sp675 Managing Oak Decline, The University Of Tennessee Agricultural Extension Service
Sp675 Managing Oak Decline, The University Of Tennessee Agricultural Extension Service
Forestry, Trees, and Timber
Oak decline is a slow-acting disease complex that involves the interaction of predisposing factors such as climate, site quality and advancing tree age. No single cause is responsible for the decline. Trees that are greater than 70 years of age and that occur on drier sites such as shallow, rocky soils on ridgetops and south- to west-facing upper slopes are most affected. Mortality of rootlets in the upper 12 inches of the soil initiates dieback in severe droughts. Secondary insects and diseases (red oak borers, twolined chestnut borers, armillaria root rot, defoliating insects, hypoxylon cankers) are contributing factors that cause …
Impact Of Impregnation With Imersol-Aqua On The Yellow Color Tone Of Some Woods And Varnishes, Mustafa Hi̇lmi̇ Çolakoğlu
Impact Of Impregnation With Imersol-Aqua On The Yellow Color Tone Of Some Woods And Varnishes, Mustafa Hi̇lmi̇ Çolakoğlu
Turkish Journal of Agriculture and Forestry
This study was performed to determine the effects of impregnation on the yellow color tone (YCT) of some woods and varnishes. For this purpose, the test specimens prepared from Oriental beech (Fagus orientalis Lipsky) and oak (Quercus petrea Liebl.) according to ASTM D 358 were impregnated with Imersol-Aqua according to ASTM D 1413-99 and the manufacturer's instructions by short-term, medium-term, and long-term dipping, and were then coated with synthetic, acrylic, waterborne, and polyurethane varnishes according to ASTM D 3023. The YCT of test specimens after the varnishing process was determined according to ASTM D 2244-02. As a result, the highest …
Spatial And Temporal Patterns Of Eastern White Pine Regeneration In The Northwestern Ohio Oak Stand, Scott R. Abella, Neil W. Macdonald
Spatial And Temporal Patterns Of Eastern White Pine Regeneration In The Northwestern Ohio Oak Stand, Scott R. Abella, Neil W. Macdonald
Public Policy and Leadership Faculty Publications
Eastern white pine (Pinus strobus L.) was often associated with oaks (Quercus spp.) on upland sites in presettlement forests of the upper Great Lakes region, but widespread logging and subsequent fires in the late 1800s converted these upland sites to fire-tolerant oak forests. Although white pine regeneration is occurring in these second-growth oak forests, white pine regeneration patterns in oak forests of the Great Lakes region are not well documented. We examined white pine regeneration in the southern Great Lakes region in an oak stand within the Oak Openings region of northwestern Ohio, where white pine plantations established in the …
Xylotroph Micromycetes Of Oak Trees In Azerbaijan Forests, Elşad Hüseyi̇n
Xylotroph Micromycetes Of Oak Trees In Azerbaijan Forests, Elşad Hüseyi̇n
Turkish Journal of Agriculture and Forestry
It is of great importance to study the activities of fungi in forest ecosystems for both protecting them and optimizing their functions. In this study, we present 130 species of xylotroph micromycetes found on six different species of oak in Azerbaijan. Of the species found, 54 were from 38 genera from 10 families of the Ascomycotina subdivision. Thirty-four were of the Pyrenomycetes class in which many have stromas or their peritheciums formed in dense groups. The majority of these species were found on wood in the initial phase of decomposition. The Loculoascomycetes and Discomycetes class were represented by 18 and …
Population Dynamics In Response To Fire In Quercus Laevis - Pinus Palustris Barrens And Related Communities In Southeast Virginia, Allen E. Plocher
Population Dynamics In Response To Fire In Quercus Laevis - Pinus Palustris Barrens And Related Communities In Southeast Virginia, Allen E. Plocher
Biological Sciences Theses & Dissertations
Permanent plots in the Zuni Pine Barrens (Isle of Wight Co., Virginia) were sampled in order to: quantify plant population dynamics in response to fire, compare these dynamics among different moisture regimes, compare the effect of mechanical understory removal to that of fire on tree seedling and herbaceous dynamics, and determine the effect of dense lichen (Cladonia spp.) coverage on pine seedling establishment and survival. Fire resulted in 40% aboveground mortality in the overstory, 80% in the sapling/large shrub layer, and nearly 100% in the understory, followed by a 3.3 to 10.6 fold increase in understory density. Regeneration …