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Srovnání růstové odezvy na změny klimatických faktorů v letokruhových řadách smrku ztepilého (Picea abiesL./ Karst.) a douglasky tisolisté (Pseudotsuga menziesiiMirb./ Franco)
Kalouš, Pavel
This bachelor thesis deals with the study of the influence of climatic parameters on radial growth of Douglas fir and Norway spruce. I worked at two localities of the School Forest Enterprise Masaryk´s Forest Křtiny with similar natural conditions and a total of 160 samples were collected. At first, the samples were ground and measured in the laboratory. Subsequently, the dating of individual ring series was performed. Thereafter, the age trend was removed, and site chronologies were created. The resulting indexed site chronologies were correlated with average monthly temperatures and monthly precipitation sums. I hypothesised that radial growth of spruce will be more influenced by monthly precipitation than the growth of Douglas fir. This hypothesis was confirmed, because statistically significant effect of precipitation on radial growth of Norway spruce was proven at seven months (VI, VII, IX, XII of the previous year and I, VI, VII in the year of ring formation), whereas for Douglas fir only at two months (I, VII). The effect of average monthly temperatures was less significant for both studied species in comparison with monthly precipitation totals - statistical significance for Douglas fir was proven in three months (IX, XI of the previous year and III in the year of ring formation) and for Norway spruce in two months (VIII of the previous year and VII in the year of ring formation).
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