ZMĚNY VE VÝVOJI POPULACE SILNĚ OHROŽENÉHO TISU ČERVENÉHO (TAXUS BACCATA L.) V LUŽICKÝCH HORÁCH PO 20 LETECH ZINTENZIVNĚNÉ OCHRANY (1999–2019). (Czech)

The common yew (Taxus baccata L.) is classified as a highly endangered plant species according to the valid national legislation. Wild or at least historical cultural occurrences of this species have been preserved only in some areas of the Czech Republic, including the Lusatian Mountains. In this region, the issue of yew has been given increased attention for two decades. In 1999, a targeted inventarization of species occurrence sites was started. The yew gene pool is protected and the population reinforcement by plantings at selected forest sites is carried out. The subjects of interest are 14 potentially autochthonous ± isolated yew localities in the Lusatian Mountains and 3 localities of undoubtedly cultural origin. Selected quantitative and qualitative characteristics of all known yew individuals were measured. More attention is focused on the issue of natural regeneration, seedlings ecesis and sex ratio. The results correspond well with the findings of other authors. Yew, even in advanced age, is characterized by a significant increase in thickness and good vitality. The species responds very positively to supportive measures of regulatory conservation management. [ABSTRACT FROM AUTHOR]
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