Struktura a modelový vývoj lesních porostů v NPR Trčkov – CHKO Orlické Hory, Česká republika

Vacek, Zdeněk; Vacek, Stanislav; Remeš, J.; Štefančík, Igor; Bulušek, Dan; Bílek, Lukáš

doi:10.2478/forj-2014-0030

Cited by 8 publications

(11 citation statements)

References 15 publications

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“…Overall, forests represent a very important carbon repository (Vacek et al 2013;Holubík et al 2014;Fujisaki et al 2015), with its greater part bound in the forest soil (Guo & Gifford 2002). It is estimated that approximately 30 to 50% of total carbon content in forests is located in soils (Dixon et al 1994;Paul et al 2002;Pan et al 2011;Wiesmeier et al 2013;Grüneberg et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Carbon sequestration in soil following afforestation of former agricultural land in the Czech Republic

Cukor

Vacek

Linda

et al. 2017

Central European Forestry Journal

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Soil organic carbon (SOC) is a great component of the global carbon cycle and plays significant role in terms of climatic changes and agricultural land-use. An important management concern is the extent of SOC stocks sequestration when farmland is converted to forest stands. We have reviewed the literature about changes in SOC stock in relation to altitude and stand age and sought differences between former agricultural land and origin forest stands. Accumulation of SOC was monitored in 17 examples (41 samples) in 9 locations across the all Czech Republic with focus on the main tree species Norway spruce (Picea abies [L.] Karst.). Results showed a significant increase of SOC stock in an afforested farmland with increasing stand age. Another factor was the altitude. With increasing altitude, the carbon stock in our model gradually decreased. From the data analyzed comparing forest stand and former agricultural land, similar carbon sequestration was documented for both variants with higher SOC for forest stands. However, other conditions affecting SOC stock should be taken into consideration, especially silvicultural management, topography, disturbances, soil properties and cultivation. The general tendencies of SOC changes at the investigated sites are comparable to those in other studies across the Europe.

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Section: Introductionmentioning

confidence: 99%

Carbon sequestration in soil following afforestation of former agricultural land in the Czech Republic

Cukor

Vacek

Linda

et al. 2017

Central European Forestry Journal

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“…A rapid decrease of Norway spruce defoliation during the last almost twenty years in the Krkonoše Mts. was reported also by other authors (Vacek, Podrázský 2007) and it certainly represents a positive signal in regard to the forest health development in this region. Annual height increment, on the other hand, exhibits only a slightly insignificant increase.…”

Section: Discussionmentioning

confidence: 67%

“…(Šrámek et al 2008) or the Jizerské hory Mts. (Lomský et al 2012) but it does suffer from the synergistic effect of high and long-lasting air pollution and climatic stress that has led to extensive decline and dieback of the forest (Vacek, Podrázský 2007;Váv-rová et al 2009). Signs of air pollution damage had already appeared in the Eastern Krkonoše Mts.…”

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confidence: 99%

Changes in the nutrition and health status of young Norway spruce stands in the Krkonoše Mts. in a 17-year period

Novotný¹,

Lomský²,

Šrámek³

2017

J. For. Sci.

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Novotný R., Lomský B., Šrámek V. (2017): Changes in the nutrition and health status of young Norway spruce stands in the Krkonoše Mts. in a 17-year period. J. For. Sci., For 17 Norway spruce stands located in the Krkonoše Mts. in the Czech Republic a long-term assessment of defoliation, height increment, foliage concentration of nutrients (N, P, Ca, K, Mg) and stress elements (S, F) was carried out. The results show a decrease of defoliation and a slight increase of height increment, which occur in accordance with the decreasing concentration of sulphur in spruce needles. However, neither sulphur concentration nor height increment trends are significant, suggesting that both the main pollution abatement and the growth resumption took place already in the 1990's. During the late 1990's the average spruce defoliation was greater than 35%, while since 2007 it has fluctuated between 18 and 25%, which corresponds with the figures for the forest stands located in the other regions of the Czech Republic. The evaluation of single nutrient concentrations detected occasional deficiencies of P and Mg at individual plots. The good N nutrition (> 15 mg N·g -1 ) in combination with a significantly decreasing trend of P, K and Ca concentrations in Norway spruce needles may potentially constitute a problem in regard to both the future health and the stability of forest stands in the studied region.

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“…The model Sibyla represents a well-established forest model, which has been repeatedly used in the research of forest development driven by various management types, disturbances or by climate change (Hlásny et al 2011(Hlásny et al , 2014Vacek et al 2013;Ambrož et al 2015;Härtl et al 2016). That the model operates at a scale of trees facilitated analyses that utilize tree positions, including the assessment of stand structure indicators or change in tree species composition.…”

Section: Discussionmentioning

confidence: 99%

“…Vacek et al 2013;Hlásny et al 2011Hlásny et al , 2014Hlásny et al , 2016Ambrož et al 2015;Härtl et al 2016). The model simulates mortality at a scale of trees and considers both the inherent tree mortality (Ďurský et al 1996, 1997) and mortality related to disturbances (Fabrika & Vaculčiak 2009).…”

Section: Introductionmentioning

confidence: 99%

Effect of different tree mortality patterns on stand development in the forest model SIBYLA

Trombik¹,

Barka²,

Hlásny³

2016

Forestry Journal

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Forest mortality critically affects stand structure and the quality of ecosystem services provided by forests. Spruce bark beetle (Ips typographus) generates rather complex infestation and mortality patterns, and implementation of such patterns in forest models is challenging. We present here the procedure, which allows to simulate the bark beetle-related tree mortality in the forest dynamics model Sibyla. We explored how sensitive various production and stand structure indicators are to tree mortality patterns, which can be generated by bark beetles. We compared the simulation outputs for three unmanaged forest stands with 40, 70 and 100% proportion of spruce as affected by the disturbance-related mortality that occurred in a random pattern and in a patchy pattern. The used tree species and age class-specific mortality rates were derived from the disturbance-related mortality records from Slovakia. The proposed algorithm was developed in the SQLite using the Python language, and the algorithm allowed us to define the degree of spatial clustering of dead trees ranging from a random distribution to a completely clustered distribution; a number of trees that died in either mode is set to remain equal. We found significant differences between the long-term developments of the three investigated forest stands, but we found very little effect of the tested mortality modes on stand increment, tree species composition and diversity, and tree size diversity. Hence, our hypothesis that the different pattern of dead trees emergence should affect the competitive interactions between trees and regeneration, and thus affect selected productivity and stand structure indicators was not confirmed.

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Struktura a modelový vývoj lesních porostů v NPR Trčkov – CHKO Orlické Hory, Česká republika

Cited by 8 publications

References 15 publications

Carbon sequestration in soil following afforestation of former agricultural land in the Czech Republic

Carbon sequestration in soil following afforestation of former agricultural land in the Czech Republic

Changes in the nutrition and health status of young Norway spruce stands in the Krkonoše Mts. in a 17-year period

Effect of different tree mortality patterns on stand development in the forest model SIBYLA

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