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Showing 1 to 20 of 84 for “"beech"”.
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EXOPHYLACTIC AND NECROPHYLACTIC PERIDERM DEVELOPMENT IN AMERICAN BEECH
<p>American beech (Fagus grandifolia Ehrh.) in forest stands of North America are threatened by a destructive disease commonly known as the beech bark disease. Investigations on bark structure and on response of bark tissues to mechanical injury and pathogen invasion would increase our …
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Sensitivity of planted European beech saplings to soil drought
Im Kontext des Klimawandels ist die Erforschung von möglichen Trockenheitsreaktionen der Rotbuche, insbesondere von gepflanzten Jungbäumen im Stadium der Etablierung im Waldbestand, von fundamentaler waldbaulicher Bedeutung. Im Rahmen der vorliegenden Arbeit wurden die Auswirkungen von Trockenheit …
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A Dendrochemical Analysis of Lead, Aluminum, and Calcium in Southern Appalachian American Beech.
… an important northern hardwood species, American beech (<em>Fagus grandifolia</em> Ehrh.) at Mount Rogers and Whitetop Mountain, Virginia. Dominant and codominant trees were sampled from sixteen research plots located at two different elevations. Samples were crossdated, divided into sections of …
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Growth of advanced European beech trees in the transformation phase in the southern Black Forest
… and its effects on the growth of European beech as a tool to aid the transformation of stands in the southern Black Forest. The research hypothesis, which spawned from this, covered the three main tree growth attributes; basal area, height and crown width, and their importance to gap …
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The effects of tree crown plasticity on the structure and dynamics of near-natural beech forests
… individual-based forest model for the species beech (Fagus sylvatica L.) was developed and implemented. The model called BEEch Plasticity (BEEP) describes tree crown plasticity phenomenologically and is able to model aboveground competition for PAR on a process basis. The current debate about …
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Ecology and Control of Rhododendron (Rhododendron ponticum L.) in Turkish Eastern Beech (Fagus orientalis Lipsky) Forests
… are two dominant shrub species of the eastern beech (Fagus orientalis L.) understories in the eastern and western Black Sea Region (BSR), respectively. These invasive woody species significantly reduce beech growth and can preclude tree regeneration. The ecological consequence is an aging beech …
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Effects of climate and forest management on the water and nitrogen status of European beech regeneration and understorey vegetation
… dominated by the drought susceptible European beech, especially when grown on limestone-derived soils with low water storage capacity, being common in Central and Southern Europe, are important. Moreover, climate models emphasize the significance of management practices for the adaptation to …
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Canopy transpiration of beech forests in Northern Bavaria – Structure and function in pure and mixed stands with oak at colline and montane sites
… and particularly of mixed stands of European beech and sessile oak. This study shows results of transpiration on different spatial-structural scales (within-tree, whole-tree and stand level) as estimated from xylem sap flow measurements, in two mixed stands in the colline-submontane …
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Nest-site resources for cavity-nesting birds in the southern Allegheny Mountain forests of West Virginia
… Black locust (Robinia pseudoacacia) and American beech (Fagus grandifolia) were most likely to have tree cavities, yet beech may be influenced by increased mortality from recent outbreaks of beech bark disease initiated by the beech scale insect (Cryptacoccus fagisuga). Nesting bird community …
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Herbicide Hardwood Crop Trees Release in Central West Virginia
… development of tolerant species like American beech (Fagus grandifolia Ehrh.) and stands with a high proportion of cull trees. Crop tree release is a widely recommended practice to improve species composition and growth rates in these unevenaged structured stands. Chemical control offers some …
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Diversity and tree neighborhood effects on the growth dynamics of European beech and the stand seed bank in temperate broad-leaved forests of variable tree diversity
Von denjenigen aktuellen Studien, die sich mit dem Effekt der Artendiversität auf ökosystemare Funktionen beschäftigen, setzen sich nur wenige mit langfristigen Veränderungen auseinander. Vor diesem Hintergrund befasse ich mich in meiner Dissertation mit Analysen der Bodensamenbank sowie …
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The E/Z isomerization step in the biosynthesis of Z coniferyl alcohol in Fagus grandifolia Ehrh.
… their trans (E) stereoisomeric form. However, in beech bark (Fagus grandifolia Ehrh.) only the corresponding cis (Z) monomers were found. Experiments with beech bark and 2-¹⁴C-labelled E ferulic acid, E coniferaldehyde, and E coniferyl alcohol revealed that these compounds were efficiently …
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Vegetation Dynamics of an Old-growth Mixed Mesophytic Forest in Southeastern Ohio, USA
… in abundance, sugar maple and American beech are rapidly increasing in importance, as is the invasive Alliaria petiolata. This shift in composition may be due to beech and sugar maple showing little negative responses to neighbors, and/or reflect increasing pressures that old-growth …
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Studies on lignin biosynthesis and structure
Beech (<u>Fagus grand1folia</u> Ehrh.> bark contains appreciable quantities of Z- (cis) con1feryl and Z-s1napyl alcohols and not the corresponding E- (trans) alcohols. Previous rad1otracer experiments suggested that the Z-coniferyl alcohol in beech bark is formed by isomerization of E-coniferyl …
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Carbon and nitrogen mineralization in temperate forest soils at low temperatures
… net N mineralization in a temperate European beech and Norway spruce forest soil. Gross ammonification, gross nitrification, net N and C mineralization as well as the temperature response of these processes (Q10 value) were determined at low temperatures. The influence of substrate quality and …
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Lignin valorization
… further application. Lignin was extracted from beech wood by two different hydrothermal alkaline treatments, which use NaOH and Ba(OH)2 as base and by an acid-catalyzed organosolv process. Moreover, lignin was isolated from bamboo, beech wood and coconut by soda treatment of the biomasses. A …
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