A study was made of the mass drying eastern spruce (Picea orientalis (L.) Link) in Teberdinsky Nature Reserve (North Caucasus). The main cause an outbreak number bark beetle (Ips typographus L.) whose reproduction occurred hot seasons 2012 and 2015. existing undergrowth not affected. By 2019, 7 years after beginning spruce, most groups had died out, single active foci were noted. There are almo...

In a recent rapid communication, Duchesne and Ouimet (2009. Can. J. For. Res. 39: 2273–2282) reported that the current expansion of American beech (Fagus grandifolia Ehrh.) in Quebec is mainly caused by soil base cation depletion due to atmospheric acid deposition. They based their conclusions on an examination of the relationships between stem densities in the sapling and tree strata compared ...

The presence and concentration of mineral nutrients and organic acids were analyzed in root xylem sap of mature beech trees (Fagus sylvatica L.). An interdependence between malate concentration, pH, and calcium and magnesium concentrations was observed. Significant correlations were found between low pH values and high calcium and magnesium concentrations, low pH values and high malate concentr...

Local and long-range transport of beech (Fagus sylvatica) pollen was analysed by using 23-year data (1983-2007) at six stations in Catalonia, Spain, and numerical simulations. Back trajectories and synoptic meteorology indicated a consistent north European provenance during beech pollen peak days. Specifically, the area from northern Italy to central Germany was the most probable source, as ind...

different ecologic factors influence on forming, development and sustaining of the plant communities, among which physiographic variables are the most important ones. the aim of this study was to identify forest types and effect of physiographical factors such as sea level height, slope and aspect of the site on quantitative characteristics of forest types in 2nd district of vaz forest with are...

Research Highlights: Fine roots play an important role in plant growth as well carbon (C) and nutrient cycling terrestrial ecosystems. Gaining a wider knowledge of their dynamics under forest gap opening would improve our understanding soil input below-ground stock accumulation. Single-tree selection is increasingly recognized alternative regime cutting sustaining biodiversity stock, along with...

Tests were carried out to investigate the cyclic loading performance of chairs constructed Scotch pine (Pinus sylvestris) and Oriental beech (Fagus orientalis). Totally, 30 real size assembled with polyvinyl acetate adhesive. Chairs tested under 3 directions; namely, front back, back front, backrest according American Library Association (ALA) specifications, obtained performances crosschecked ...

Specialist herbivores are thought to often enhance or maintain plant diversity within ecosystems, because they prevent their host species from becoming competitively dominant. In contrast, specialist herbivores are not generally expected to have negative impacts on non-hosts. However, we describe a cascade of indirect interactions whereby a specialist sooty mold (Scorias spongiosa) colonizes th...