The growth response of trees to disturbance events in 8 beech-dominated natural forests in Czech Republic was studied using standard tree-ring analysis. With the use of circa 2 000 increment cores a disturbance regime of Žofín old-growth forest was reconstructed. The results indicate not only disturbance intensity, but also their spatial characteristics determine the effect of disturbance on further forest ecosystem development. As the picture of past disturbances had not emerged to be sufficient enough to describe a historical forest development, recognizing the statistical error of their reconstructions was of great importance. Thus, the following studies focused on quantification of uncertainty in detecting the disturbance history using dendrochronology. Uncertainty in determination of summary disturbance history within the whole stand as well as disturbance spatial patterns were evaluated. The results uncovered that the specific character of dendrochronological data, i.e. the different reactions of individual trees to the identical disturbance event, was a significant source of this uncertainty. The follow-up study logically concerned on examination the true response of Fagus sylvatica to disturbances, dated by independent dendrometric and photogrammetric datasets. On the basis of analysis of nearly 300 tree responses, new empirically-derived criteria for dendrochronological determination of tree growth response were suggested. Finally, factors controlling growth response of Fagus sylvatica to disturbance events were addressed. Regression analysis determined complex of diverse factors of different spatial levels driving the growth reaction following canopy opening.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:426275 |
| Date | January 2018 |
| Creators | Vašíčková, Ivana |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/doctoralThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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