Gamtotvarkos poveikis pelkinės uolaskėlės (Saxifraga hirculus L.) populiacijoms Lietuvoje

• Main Authors: Petrauskaitė, Ieva, Juzėnas, Sigitas, Meškauskaitė, Edita
• Format: Article in Journal/Newspaper
• Language: Lithuanian; English
• Published: 2017
• Subjects: Nature management measurments; Saxifraga hirculus; population area; ecological density; Yellow Marsh; Marsh Saxifrage
• Online Access: http://vu.lvb.lt/VU:ELABAPDB22874886&prefLang=en_US

Nine populations of yellow marsh saxifrage were investigated during 2016. This paper represents the changes of S. hirculus populations’ status compared with the investigation made in 2006. It summerizes the information provided by the administration of protected areas about the frequency of the nature management measurements taken. Investigated sited are grouped in the following way: in the first group, measurements were taken 10 times, in second group they were taken 2–5 times and in the third one, no measurements were taken. To the first group belong populations from the Degučiai landscape reserve and Ilgašilis botanical-zoological reserve, where areas of S.hirculus increased 2–10 times while ecological density increased in 39– 224%. The second group contains populations found in Laukagalis telmological reserve, Kapiniškiai landscape reserve and Vainagiai landscape reserve (Galvydiškė) as well as Girutiškis nature reserve. In this group, S. hirculus populations slightly increased (Galvydiškė and Kapiniškės) or decreased 22- 100 times (Laukagalis and Girutiškis), while the ecological density had mostly declined in 87–95%, with the exception of Galvydiškė. To the third group belong populations from Netiesiai hydrographical reserve (Merkinė), Ilgos landscape reserve (Juodlė) and Vainagiai landscape reserve (Jautmalkė). In these territories, S. hirculus populations remained the same (Merkinė) or had declined 7–20 times (Juodlė and Jautmalkė). The ecological density had declined in 72–82 %, with the exception of the Jautmalkės population, where it increased in 73%. Noticeable improvements of S. hirculus population status were observed where the measurements of nature management were taken often and regularly.