Background and Aims: During ageing in oak barrels, wine undergoes changes because of the release of polyphenols and other molecules from wood. The aim of this study was to evaluate the influence of some oak wood-derived volatile compounds, ellagic acid and oak wood extracts on the levels of (+)-catechin, procyanidin B1 and malvidin-3-glucoside. Methods and Results: Phenolics and the oak wood de...

Abstract Acute Oak Decline (AOD) is a complex plant disease affecting species of native oaks, for example, Quercus robur , in Latvia. Typical AOD symptoms are bark cracks with dark exudate. In other European region countries, like the United Kingdom, associated insects, Agrilus biguttatus . From results forest survey, it can be concluded that oak stands located Latvia, there practically no dama...

Oak-dependent birds are expected to suffer severe population declines as a result of sudden oak death (SOD). We investigated how the disappearance of two highly SOD-sensitive tree species, tanoak (Lithocarpus densiflorus) and coast live oak (Quercus agrifolia), may in turn affect levels of bird species richness, diversity, and equitability in coastal oak habitats of California. Combining avian ...

disturbance was ice storms, which generally resulted in suppression of radial growth in pines and increased radial growth in oaks. Additionally, pulses of understory establishment coincided with major ice storms. The lack of understory disturbance such as fire may be allowing the establishment of shade tolerant understory species while limiting the establishment of pine and oak. Canopy disturba...

Quackenbush, Robert W. M.S., Purdue University, August 2016. An Assessment of the Competitive Ability of Oak Species in the Central Hardwood Region Using both PreHarvest Treatment Data and Stem Analysis Techniques. Major Professor: Dr. Michael Jenkins. The density of advance regeneration of oak species has been in decline across the Central Hardwood Region (CHR) for the past 50 years. This phen...

We examined tree species responses under forest harvesting and an increased fire disturbance scenario due to climate warming in northern Wisconsin where northern hardwood and boreal forests are currently predominant. Individual species response at the ecosystem scale was simulated with a gap model, which integrates soil, climate and species data, stratified by ecoregions. Such responses were qu...