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Odvisnost velikosti prevodnih elementov doba (Quercus robur L.) od temperatur na dveh rastiščih Querco-Carpinetum v Sloveniji = Pedunculate oak's (Quercus robur L.) conductive elements size dependence on temperature at two Querco-Carpinetum sites in SloveniaJevšenak, Jernej ; Levanič, TomNamen študije je analizirati odnos med povprečnimi mesečnimi temperaturami in dimenzijami trahej dveh zdravih in ene propadajoče skupine dobov z dveh rastišč Querco-Carpinetum v Sloveniji. ... Kronologije povprečnih površin trahej in vsot površin trahej smo izdelali po predhodni skrbni pripravi površin vzorcev in analizi slik z makrom EWVA v programu ImageJ. Skupina propadajočih dreves s Cigonce je imela največje povprečne površine trahej in največjo površino prevodnega tkiva, kar povezujemo s propadanjem te skupine. Analiza časovne stabilnosti korelacijskih koeficientov je za propadajoča drevesa pojasnila negativne korelacijske koeficiente, ki niso bili stabilni v času. Vse skupine so se najbolj značilno odzivale na povprečne aprilske temperature. Pri vseh skupinah je bil klimatski signal najmočnejši v parametru povprečna površina trahej. Pri zdravih drevesih iz Mlač v primeru nadaljevanja trenda dvigovanja povprečnih temperatur pričakujemo večje povprečne površine trahej v prihodnjih desetletjih, ki so bolj izpostavljene problemu kavitacije. Padec podtalnice leta 1982 na Cigonci se časovno ujema s pričetkom padanja klimatskega signala v trahejah ranega lesa.Source: Acta Silvae et Ligni. - ISSN 2335-3112 ([Št.] 107, 2015, str. 15-23)Type of material - article, component partPublish date - 2015Language - slovenianCOBISS.SI-ID - 4356262
Author
Jevšenak, Jernej |
Levanič, Tom
Topics
dendroekologija |
propadanje hrastov |
anatomija lesa |
okoljski signal |
Quercus robur |
traheje ranega lesa
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Database name | Field | Year |
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Jevšenak, Jernej | 39600 |
Levanič, Tom | 11595 |
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