The saproxylic beetle fauna on old oaks was sampled in four regions of southern Sweden using two methods: window and pitfall trapping. The aim was to test a way of finding indicator species which can be used to identify sites with high species number or that scored high on a conservation priority species index, based on occurrence of red-listed species. From 92 sites surveyed, in total 164 spec...

Reproductive strategies of closely related species distributed along successional gradients should differ as a consequence of the trade-off between competition and colonization abilities. We compared male reproductive strategies of Quercus robur and Q. petraea, two partly interfertile European oak species with different successional status. In the studied even-aged stand, trees of the late-succ...

A new species of Poemeniinae, Poemenia quercusia Sun & Sheng, sp. n., is described and illustrated. Specimens were reared from twigs of Quercus wutaishanica Blume in Haicheng, Liaoning province, P.R. China. A key to species known from China and the Eastern Palaearctic Region is provided.

The purpose of our study was to examine the psychological benefits of the treatment with Robuvit® (Horphag Research Ltd.) - polyphenolic extract obtained from the wood of oak Quercus robur - on the healthy elderly individuals using energy subscale scores of the Activation - Deactivation Adjective Check List. Analysis was focused on the comparison of pre-post treatment effect of Robuvit on sympt...

An increase in temperature along with a decrease in summer precipitation in Central Europe will result in an increased frequency of drought events and gradually lead to a change in species composition in forest ecosystems. In the present study, young oaks (Quercus robur L. and Quercus petraea (Matt.) Liebl.) were transplanted into large mesocosms and exposed for 3 years to experimental warming ...

persian oak (quercus brantii lindl., the fagaceae family) is a medicinal plant which seed flour is used to treat inflammatory and gastric ulcers by the tribes in southwestern iran. the current study was done to evaluate the effect of hydro-alcoholic extract of q. brantii seed flour for treatment of gastric ulcers induced by ethanol in wistar rats. the hydro-alcoholic extract of q. brantii was t...

The objective of this study is to understand the response of Quercus suber seedlings to light and water, two limiting factors of their growth and survival in Mediterranean woody plants. Greenhouse and field experiments were conducted to contrast the results from both types of experiments. At the greenhouse experiment, Quercus suber seedlings were grown at three treatments of light (3%, 27% and ...

the effects of initial spacing layout on some allometric characteristics of 12-year-old quercus castaneifolia trees grown in central mazandaran, north of iran were examined. trees were planted in 5 different layouts (1?1, 1.5?1.5, 2?2.5, 2?3 and 4?4 m). tree height, diameter at breast height, natural pruning height and the survival of trees were recorded in each sample plot. tree basal area and...

the impacts of dust and sand storms (dss) on people, crops, livestock, infrastructure and health are well documented. data have accumulated on the deleterious effects of dust aerosols when they settle on plants. sand blasting of low growing plants is a common cause of failure in reforestation efforts. burial of plants by moving sands are also a cause of much damage. the physics of moving sand a...