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3 2008

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Variability of needle characters of Pinus mugo Turra populations in the Karkonosze Mountains in Poland

100%

Sobierajska K. , Boratynska K.

Dendrobiology

2008

tom 59

41-49

The basic aim of the work was to widen the knowledge about variation of Pinus mugo in the Karkonosze (Giant) Mountains and verification of provenance of several, probably planted populations on that basis. Seven populations were sampled, four on hardly accessible precipices of glacial cirques as natural, and three on the topical, mostly plane or only slightly in clined parts of the mountains as potentially alien ones. The variation of the needles was biometrically analyzed in respect of 23 morphological and anatomical characters. Measurement data were subject of multivariate statistical analyses. Results call attention on rather continuous variability of P. mugo in the Karkonosze Mts. The differences among samples were found as relatively low and no direct connections have been detected between variation and provenance from precipices versus plane sites.

Spatial structure of a natural mixed topodeme of subalpine Sorbus taxa

100%

Gomory D. , Krajmerova D.

nr 4

305-311

Spatial distribution and genetic variation of a population of Sorbus chamaemespilus (L.) Crantz and putative hybrids between S. chamaemespilus, S. aria and S. aucuparia growing in the nature reserve Skalnä Alpa (central Slovakia) were studied. The analysis of spatial patterns using Ripley's K-function revealed a significant clustering of the adults of both S. chamaemespilus and hybrid taxa at distances up to ~15 m and a strong affinity between both taxonomical groups, indicating similar ecological requirements. Bivariate point-pattern analysis considering cardinal direction showed that juvenile individuals of S. chamaemespilus are clustered around the adults up to the distance of ~2 m, whereas in hybrid taxa with larger and more dense crowns, juveniles are clustered at distances more than ~3 m from the adults. The analysis of genetic variation in a subset of adult shrubs using 4 nuclear microsatellite loci revealed that unlike expected, there was no variation in S. chamaemespilus but several genotypes were found in the group of hybrid taxa. Implications for the reproduction system and conservation of the investigated taxa are discussed.

Organic matter characteristics of the Bh Podzol horizon formed under various subalpine plant communities in the Karkonosze Mountains

100%

Licznar S. E. , Mastalska-Cetera B. , Licznar M.

Polish Journal of Soil Science

2008

tom 41

nr 1

13-21

The aim of the study was to characteristic of organic matter of Bh Podzol horizons formed from granite under following subalpine plant communities in the Karkonosze Mountains: Calamagrostis villosa, Calluna vulgaris, Nardus strictaandFestuca supina. Based on fractional composition of organic matter and structural analysis of humic acids, including: elemental analysis, thermographic analysis, and infrared spectroscopy, diversification of their structure was found. Accumulated in Bh horizon humic substances under communities of Nardus strictaand Callunavulgariswere characterised as more humify with a substantial participation of fulvic fraction. Humic acids extracted from soil of these horizons were characterised as less aromatized and less oxidized. These results point out differential course of humification process taking place under different plant communities, which plays major role in components movement during podzolisation.

Celem badań była charakterystyka materii organicznej poziomów Bh bielic wytworzonych z granitów w Karkonoszach pod następującymi zbiorowiskami subalpejskiej roślinności halnej: Calamagrostis villosa, Calluna vulgaris, Nardus strictai Festuca supina. Na podstawie przeprowadzonej analizy frakcjonowanej związków próchnicznych i badań strukturalnych kwasów huminowych obejmujących: analizę elementarną i termograficzną oraz spektroskopię w podczerwieni, stwierdzono zróżnicowanie ich budowy. Gromadzone związki próchniczne w poziomach Bh pod zbiorowiskami Nardus strictai Calluna vulgaris charakteryzowały się wyższym stopniem humifikacji z dużym udziałem frakcji fulwowej. Jednocześnie występujące w tych poziomach kwasy huminowe wykazywały niższy stopień aromatyzacji. Niewątpliwie odgrywa to duża rolę w przemieszczaniu składników podczas bielicowania pod różnymi zbiorowiskami roślinnymi.