First summer sunshine reconstruction for the western part of the Balkan Peninsula for the time period 1660–2010 is based on a calibrated z-scored mean chronology, calculated from tree-ring width measurements of black pine (Pinus nigra Arnold) sites in Bosnia and Herzegovina. We identified extreme summer events and compared them to available documentary historical sources of drought and floods, and connected all extreme summers with low sunshine hours (1712, 1810, 1815, 1843, 1899 and 1966) with volcanic eruptions.
COBISS.SI-ID: 3536294
Light micrographs showing transverse sections of beech tissues. In the middle of the vegetation period, at the beginning of June cambium (CC) production of new cells was highest. A tangential band of axial parenchyma cells (arrowheads) and early phloem sieve (EPh) tubes. At the beginning of September has cambium production already ceased. Fully formed phloem growth ring with early (EPh) and late (LPh) is clearly visible.
COBISS.SI-ID: 2115465
Dynamics of ectomycorrhizal fungi and their mycelium in forest soils is understudied and often neglected in processes of cycling of nutrients (C, N, P) in forest soils. In a series of original and review scientific papers we have presented the role of ectomycorrhizal fungal mycelium, their production and senescence, methods to study it and steps towards modelling. Results and conclusions show the crucial role of ectomycorrhizal fungi in forest ecosystems, which should be adequately addressed in all material and energy based studies of forest ecosystems.
COBISS.SI-ID: 3432102
Ash dieback is an emerging disease caused by the fungus Chalara fraxinea that severely affects Fraxinus excelsior and F. angustifolia stands in Europe. Previous studies have shown that this pathogen prefers temperatures around 20°C, while its growth in pure cultures at 30°C proved to be very limited. The purpose of this study was to determine the effects of temperature on the development and growth of C. fraxinea in pure cultures and in plant tissues, as well as to test the heat tolerance of F. excelsior saplings. The sensitivity of fungus to heat in ash tissues was higher than in pure cultures. Low isolation success rate from diseased ash tissue after a five-hour hot water treatment at 36°C and the relatively high survival rate of ash saplings after hot water treatments at 36°C and 40°C indicate possibilities for the development of a C. fraxinea eradication method in ash saplings. Field monitoring showed that in hot weather periods, thermal conditions inside the ash tissues can be extreme enough to markedly decrease the viability of C. fraxinea in infected plant tissues.
COBISS.SI-ID: 3567782
The physiological, the morphological and the growth response of beech and fir trees were compared on sites with a single selection method, group selection method and old growth, during three consecutive vegetation periods (2009, 2010 and 2011). In the old growth forest, beech and fir were more shade-tolerant and had a greater reaction to different light levels, compared to managed forest sites. Fir and beech express more physiological and morphological shade-tolerant characteristics on sites with single selection treatment, and differences are also evident in the growth responses of the two species.
COBISS.SI-ID: 3494310