1721 research outputs found
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Mortality and crown conditions on Quercus robur L. permanent plots - a 20-year overview
No full textPedunculate oak (Quercus robur L.) forests in Slovenia are experiencing widespread mortality. Changes in lowlands are reflected in decline of complete forest complexes, high mortality, uneven stand structure and associated forest regeneration problems. Prediction of the present-tree response in disturbed forest ecosystems may significantly contribute to better guideline policies for the silvicultural and forest management practice in the changing environment in both stressed and stabile forest
ecosystems. Data from annual crown condition surveys in the 1995-2014 period from four permanent plots have been compared with parameters from hemispherical photo analysis and hydrometeorological data. Good agreement has been confirmed between crown defoliation and total openness; all parameters from the hemispherical photo analysis, which were corrected for winter period values, also indicated a better agreement. Mortality rate and crown defoliation correlated well with extreme drought
events. Pattern of agreement among compared parameters was different for the Krakovski gozd and Dobrava plots on one hand and Cigonca and Hraščica plots on the other hand. Mortality is influenced by the average air temperatures much more than by precipitation and groundwater table oscillations
Posodobitev sistema vegetacijskih osnov za potrebe načrtovanja v gozdarstvu: zaključno elaboratno poročilo CRP projekta (V4-1141) (1. 10. 2011 do 31. 3. 2014)
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PROFORBIOMED: promotion of residual forestry biomass in the Mediterranean basin: progress report 8: submited version: period from 2014-09-01 to 2014-11-30
Full text linkAol specific checklists derived from the innovation roadmap for the improvement of the defined biomass SCORPs
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High levels of effective long-distance dispersal may blur ecotypic divergence in a rare terrestrial orchid
No full textGene flow and adaptive divergence are key aspects of metapopulation dynamics and ecological speciation. Long-distance dispersal is hard to detect and few studies estimate dispersal in combination with adaptive divergence. The aim of this study was to investigate effective long-distance dispersal and adaptive divergence in the fen orchid (Liparis loeselii (L.) Rich.). We used amplified fragment length polymorphism (AFLP)-based assignment tests to quantify effective long-distance dispersal at two different regions in Northwest Europe. In addition, genomic divergence between fen orchid populations occupying two distinguishable habitats, wet dune slacks and alkaline fens, was investigated by a genome scan approach at different spatial scales (continental, landscape and regional) and based on 451 AFLP loci