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Potencjalny zasięg klimatyczny jodły (Abies alba Mill.) w Polsce

100%

Bolibok L., Zajaczkowski J., Dobrowolska D., Mionskowski M.

Sylwan

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2016

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tom 160

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nr 06

Numerous examples of silver fir stands growing outside its geographical range in northern Poland suggest that this species could be used in a greater extend in creation of managed forest stands. Climatic conditions could potentially constrain the use of this species in some parts of country. The objective of this work was to determine the potential climatic range of Abies alba in Poland. The bioclimatic envelope models were used to identify areas in which selected climatic variables show the same range of variability as observed within natural range of this species. Climatic data with 10' spatial resolution were used. The outcome of the analysis depends to large extent on the demarcation of natural range (in which the variability of tolerable climatic conditions is assessed). The model basing on the climatic conditions in whole natural range of silver fir in Europe suggest that almost whole area of Poland is suitable to fir, but models basing only of climatic conditions in Polish part of its natural range are much more conservative. In the last case the difference in extent between natural range and potential climatic range was smaller. As genetic variability of Polish fir populations is rather low, they are supposed to have constrained adaptative abilities. Forest managers should not focus on planting silver fir outside its natural range, but they rather should consider reintroduction of fir in parts of natural range from where it retreated in 20th century.

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Metoda standaryzacji kosztów administracyjnych nadleśnictw z wykorzystaniem stopnia trudności gospodarowania

100%

Kocel J., Kwiecien R., Mionskowski M., Garbacz M.

Sylwan

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2017

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tom 161

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nr 03

The article presents a method to standardize the administrative costs of forest districts using the management difficulty level index (STG). The scope of the study included the development of a revised structure of the STG for forest districts, comparison of the substantive and statistical factors that shape the level of administrative costs being incurred by forest districts with partial indicators that form the STG index, the development of the methods for determining the standard administrative costs of forest districts using the STG, and the selection of a method to be applied in the financial and economic practice of the State Forests. The source data for the administrative costs incurred by forest districts, as well as the data on the natural−forest conditions and annual economic tasks of the forest districts were obtained from the State Forests Information System databases for all the forests districts in Poland and from the Bureau for Forest Management and Geodesy. Information about the social environment of the forest districts was obtained from the Local Data Bank of the Central Statistical Office in Poland. In the methodological assumptions concerning the development of a method for shaping the level of administrative costs of the forest districts, two variants were adopted. The structuring of the STG for forest districts, as a tool to standardize administrative costs of forest districts, adopts the 'sum of relative values' method, where relative values of individual partial indicators (six simple and five complex ones) are obtained by dividing the absolute values of a specific indicator by the maximum value of this indicator for the whole population The obtained results of calculating the level of standard administrative costs of forest districts in two variants were similar. For the sake of clarity, simple mathematical formulas, and the ease of use by organizational units of the State Forests, the administrative cost standardization method based on the calculated average value of 1 item of the STG for forest districts per a given administrative cost group in the State Forests was used to build a makeshift of the State Forests plan for 2014−2016.

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Zagrożenie lasów Polski na podstawie modelu ryzyka uszkodzenia drzewostanu przez wiatr

100%

Dmyterko E., Mionskowski M., Bruchwald A.

Sylwan

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2015

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tom 159

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nr 05

On the basis of the wind damage risk model for forests using the data of the State Forests Information System, the stand damage risk factor Wr for each of the 430 forest districts in Poland and the threat measure Ms for a given forest district were determined. The measure of threat to forest Ms for a forest district is a methodical basis for assessing the potential damage to forests in Poland. Its value ranges from 8.1% for the Brzózka Forest District to 48.9% for the Ujsoły Forest District (fig. 1), giving the average value of 24.6% and standard deviation of 7.03%. The measure Ms was the basis for differentiating the levels of threat of wind damage to forest for forest districts. Level 1 (Ms 10%) indicates low threat, level 2 (10%Ms 20%) – elevated threat, level 3 (20%Ms 30%) – moderate threat, level 4 (30%Ms 40%) – high threat, level 5 (Ms 40%) – very high threat. Low threat to forests was found only in two forest districts located in the western part of the country. 113 forest districts, which form large concentrations particularly in western and central Poland, are exposed to an elevated threat. Most forest districts (233) are classified to a group of moderate threat. They are located across the country and are mostly concentrated in the northern and southern regions of Poland. 71 forest districts exposed to high threat are concentrated in the south of Poland in the Carpathians and the Sudetes, with scattered presence in the north of the country. Most of the 11 forest districts with a very high threat to forests are located in the mountains (tab., fig. 1). For the forest districts with a particularly high and very high threat, new silvicultural procedures and the basis for decision making in the field of forest management should be developed to reduce the risk of damage to forest.

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Metody standaryzacji kosztów jednostkowych wybranych prac z zakresu hodowli lasu

100%

Kocel J., Wysocka-Fijorek E., Mionskowski M.

Sylwan

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2019

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tom 163

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nr 11

The article presents methods for standardizing the costs of the silvicultural treatments (renewals and afforestation, corrections and additions, tending). Our scope included the statistical determination of factors shaping the costs of selected works, elaborating methods of their standardization, assessment of these methods suitability for determining standard unit costs of selected silvicultural works, and selection of the method for application in the financial system of the State Forests. The data were obtained from the database of the State Forests Information System for all forest districts in the country. Information about the social background of forest districts was obtained from the Local Data Bank. Initially we analysed factors shaping the costs of forest works. The first developed method was based on the grouping of forest districts with similar natural conditions described by the forest habitat types, which are the main factor shaping the costs of silviculture. The other method consisted of technological models for the field−works using the time−consumption catalogues used in the State Forests. Each of the developed methods is characterized by specific disadvantages and advantages. The first method determines the standard costs on the basis of historical data. The use of data incurred by forest districts in previous years has a major disadvantage, as they may contain results of poor efficacy from previous periods. However, the creation of groups of forest districts with similar natural conditions by organizational units from different regions of the country with different economic and social conditions, as various regional directorates of the State Forests pursuing a specific policy on the amount of rates for services performed by forest companies limits the disadvantages. The main advantage of the other method is that it is not based on the historical data. This method also gives the forest district management the opportunity to compare rates for services provided by forestry companies with the economic environment of the forest district, thanks to the use of the average monthly gross wages in administration districts. The disadvantage of this method is the lack of source data (time−consumption) from forest districts planning costs in natural units and applying long−term agreements with forestry services companies. Full assessment of the proposed methods will be possible after comparison of standardized costs calculated by different methods with actual values.

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Rozpad drzewostanów świerkowych w Beskidzie Żywieckim

100%

Dmyterko E., Bruchwald A., Mionskowski M.

Sylwan

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2019

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tom 163

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nr 02

In the Beskid Żywiecki, the combination of abiotic, biotic and anthropogenic factors unfavourable for the growth of trees led to the dieback of spruce stands. The intensification of this process began after the hurricane in November 2004, followed by years of negative climatic water balance. The deterioration of tree growth conditions occurred after the drought in July 2006 and damage caused by the Kyril hurricane in January 2007. The weakened spruces were attacked by the bark beetles, the outbreak of which caused a massive dieback of spruce stands. In order to assess the volume of harvested timber in years 2004−2016, the volume of allowable cut (model volume) was calculated from the stand growth model for each forest district of Beskid Żywiecki. The comparison of the volume of harvested timber with the model volume allowed to determine the rate of dieback of spruce stands. The volume of harvested timber in 2007−2009 exceeded the model volume even 2.5 times. The cuts included mainly deadwood, wind−broken and wind−fallen trees, while the harvest of live trees was scarce. In the period 2010−2013, the harvested volume of live trees accounted for 50−70% of the model volume, the volume of deadwood in the same period was ca. 100% and additionally the volume of blown−down timber after the hurricane was 20−40% of the model volume, which taken together accounted approximately to 200% of the model volume. The execution of such harvesting operations, including silvicultural tasks, did not allow to carry out optimal forest management. The period 2010−2013 saw a downward trend. It was disrupted by the hurricane in December 2013, after which the volume of harvested timber, consisting mainly of wind−broken and wind−fallen trees, increased to 280% of the model volume. Again, the high volume of harvested timber was noted in 2016, (ca. 220% of the model volume). The process of damage to spruce stands in Beskid Żywiecki is likely to continue. A decline in its intensity may occur in the absence of old stands, which to a large extent already takes place in the forests of the Węgierska Górka Forest District. Currently, the most threatened by wind are forests in Ujsoły, Jeleśnia and Nowy Targ forest districts. The least threatened are forests in the Węgierska Górka. This forest district and in the future the remaining forest districts of Beskid Żywiecki, will face enormous challenges to obtain high yield and appropriate species composition.

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Wielkoobszarowa inwentaryzacja stanu lasu źródłem informacji o powierzchni lasów w Polsce

100%

Jablonski M., Mionskowski M., Budniak P.

Sylwan

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2018

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tom 162

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nr 05

Forest area in Poland is annually evaluated as a part of public statistics research. However, this information is based on land use resulting from Land and Property Register (LPR). Delays in the reclassification of afforested land, as well as the natural expansion of trees on abandoned agricultural lands, observed over the last decades, caused that information from LPR becomes unreliable. In many countries forest area is assessed within the National Forest Inventories (NFIs) based upon systematic grid of sample plots. NFI in Poland has been performed since 2005, in 4×4 kilometre grid with clusters consisting of five plots. Until 2014 measurements were made only on these sample plots which were located in forest according to LPR records. Within the 3rd NFI cycle (2015−2019) the areas fulfilling the criteria of forest definition, but located on non−forest land referring to LPR, has become the object of study. The aim of this work is to present statistical approach for evaluation of forest area using NFI cluster sampling data. Additionally, results from two year measurements (2015−2016) were analysed and compared with LPR data. Attributes of NFI plots allow to apply national forest criteria as well as the land use and land cover thresholds recommended by Food and Agriculture Organization of the United Nations or Kyoto Protocol. Our research shows that forest cover in Poland is in the range of 32.8−33.0%, depending on forest definition used, and is almost 3% higher than official LPR data (30.1%). The standard error of forest cover, based on two years NFI data is 0.44. Thus, with 95% probability the true value of this parameter lies between 31.9 and 33.7%, while country thresholds of forest definition are used. Additionally it was assessed that using the entire NFI cycle data the standard error of forest cover should be lower i.e. less than 0.3. The National Forest Inventory seems to be an appropriate tool for monitoring forest area in Poland.

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Stopień uszkodzenia świerka, jodły i modrzewia w Sudetach Zachodnich

100%

Korzybski D., Mionskowski M., Dmyterko E., Bruchwald A.

Sylwan

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2013

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tom 157

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nr 02

The aim of this research was to assess damage to three important forest−forming trees species in the mountains – spruce, fir and larch, and to study their increment reaction to changing environmental conditions. Research concerned forests under the management of four forest districts located in the Western Sudetes (SW Poland). Index W ranging from 0 to 3 was used for the assessment of the damage to trees based on three crown characteristics: defoliation, top−crown condition and tree vitality. Trees of damage degree 2 dominated in each of the species; dying trees (degree 3) were also found. Total share of these two degrees of damage was ca 80% for spruce, 84% for fir and 74% for larch. Analysis of increment reaction of investigated species showed their similar response to changes in the environment. The increase in the share of trees showing positive responses and the decrease in the share of negative responses in the past half century, indicate an improvement in the growth conditions of spruce, fir and larch in Western Sudetes.

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Model składu gatunkowego drzewostanu dla lasów w Sudetach z uwzględnieniem zmian klimatycznych

100%

Dmyterko E., Bruchwald A., Mionskowski M., Brzeziecki B.

Sylwan

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2020

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tom 164

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nr 06

Climate change creates a big challenge for forest science. One of several problems calling for urgent solution concerns the elaboration of the scientific foundations for determination of the species composition of forest stands under changing environmental conditions. This problem is particularly acute in case of declining Norway spruce stands in the Sudety Mountains (SW Poland). The paper presents the main principles used to develop a model allowing determination of the most desirable species composition for any given forest stand occurring in the Sudety region. These principles include: 1) an assumption that a basis for species composition planning should be a forest site type, corrected by means of site index of the currently existing forest stand, 2) a supposition that one should broadly consider present processes taking place in Sudety stands, particularly, an intense forest dieback caused by recurring drought periods and strong winds, 3) a postulate that one should consider the differences between tree species in respect to their reaction to particular abiotic factors, 4) an assumption that majority of stands should consist of several different tree species, 5) an assumption that introducing on a wide scale Douglas fir, well−adapted to the conditions of the Sudety Mountains, is allowed, 6) an idea that one should take into account differentiated production potential and varied timber quality of particular tree species, 7) an assumption that one should consider the main features of topography (altitude, exposition, slope) as well as 8) fine elements of micro−topographical situation, as a basis for introduction of different tree species. The results obtained by means of the model based on the above mentioned principles are presented on the example of two forest districts: Lądek−Zdrój (fig. 4a, b) and Szklarska Poręba (fig. 5a, b). In both cases, a necessity to diminish the share of Norway spruce and to increase the share of such species like common beech, silver fir, Douglas fir and European larch is demonstrated. One may expect that projected compositions, taking into account the most appropriate tree species and their most suitable localizations, will allow establishment of forest stands which will be more resistant to drought and wind and, thus, will be more able to fulfill several important forest functions (related to water and soil protection, protection of forest biodiversity and timber production).

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Wskaźnik stopnia trudności gospodarowania leśnictw Lasów Państwowych

100%

Kocel J., Kwiecien R., Mlynarski W., Mionskowski M.

Sylwan

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2012

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tom 156

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nr 06

10

Dynamika procesu zamierania drzew w Sudetach w latach 2002-2018

100%

Bruchwald A., Dmyterko E., Mionskowski M., Wrzesinski P.

Sylwan

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2019

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tom 163

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nr 12

The aim of the study was to present two issues concerning forests in the Sudety Mts. (SW Poland): 1) the process of tree mortality in individual years in the period between 2002 and 2018, as well as 2) the analysis of the radial growth of the main tree species (i.e. spruce, larch, beech, fir and Douglas fir). The intensity of the process of tree mortality is evidenced by the volume of wind−broken or wind−fallen trees and deadwood. The record volume of post−hurricane wood was harvested after the hurricane ‘Cyril’ (January 2007). The volume of wood removed in 2007−2008 amounted to 1.4 million m³. Quite a high share of wind−broken and wind−fallen trees in the volume of harvested wood raw material concerned the years 2002, 2003, 2006, 2008 and 2018. In the latter year, the damage was caused by the hurricane ‘Grzegorz’. The record removal of deadwood occurred in 2016 following an exceptionally severe drought in the 2015 growing season. The high volume of deadwood in 2017 and 2018 was augmented by quite a high volume of wind−broken and wind−fallen trees. Spruce and larch showed the strongest response to severe drought in 2015 by lowering the increment in diameter and producing a narrow layer of latewood, while the response of beech and Douglas fir was the slightest. No such response was found in fir. The main tree species in the Sudetes is spruce, which quickly disappears from this area. It is necessary to look for such species of trees that might replace spruce, i.e. species more suitable to changing climatic conditions, such as beech, oak, ash, sycamore, pine and larch – but also fir and Douglas fir. The latter two species show a high tolerance to changing climatic conditions, and a high potential in the production of wood.

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Podstawy planowania składu gatunkowego w lasach górskich na przykładzie Beskidu Niskiego

88%

Bruchwald A., Dmyterko E., Mionskowski M., Niemczyk M., Lukaszewicz J.

Sylwan

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2016

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tom 160

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nr 03

The study presents a method of planning species composition of forest stands in mountain areas on the example of Beskid Niski Mts. (south−eastern Poland). The focus was on the species composition of forest stands growing in different conditions, taking into account the type of forest habitat and terrain characteristics: altitude, exposition and slope. The research was based on data stored in the Information System of the State Forests. We used modified growth model for data processing and calculation of site index for the forests older than 60 years. The Beskid Niski Mts. are covered mostly by European beech (33.8%), silver fir (28.3%) and Scots pine (18.9%). Taking into account exclusively the productive capacity of individual forest stands, fir and spruce would be the most desirable species in analysed region. The Beskid Niski Mts. are characterized by a very small diversity of the habitat with domination of mountain fresh deciduous forest (LGśw, 92.1% of the area). We divided analysed region into four altitudinal zones that vary greatly in fraction of afforested area. Beech dominates in all zones and its share increases from the foothills to montane zone (fig. 5). Basing on a digital terrain model, the areal share of 10 landforms was determined for each stand and altitudinal zone (fig. 8). This enabled more detailed planning of species composition. However, it required the adoption of six specific assumptions including the need to maintain a suitable proportion of all tree species growing in the mountains, specifically the main forest tree species: spruce, fir and beech. The 5−stage project (preliminary, historical, current, planning, verification stages) consisting of planning species composition uses, in stage 4, detailed information on landforms. The project assumes that the fragments of forests where trees are expected to grow fast will be earmarked for endangered species. The model sees the need of planting the weaker tree species to be present in the forest ecosystems of the Beskid Niski. The proposed project will enable foresters−practitioners to plan the forest species composition for each of the forest districts in the Beskid Niski quickly. Such a programme might also be an integral part of the growth model of forests useful for forecasting and increasing timber resources.

12

Określenie wielkości standardowych kosztów administracyjnych nadleśnictw na podstawie wskaźnika stopnia trudności gospodarowania

88%

Kocel J., Kwiecien R., Wysocka-Fijorek E., Mionskowski M., Garbacz M.

Sylwan

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2018

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tom 162

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nr 02

The paper presents the results of the standardization of administrative costs of forest districts using the Management Difficulty Index (STG) for forest districts. It discusses the basis for the structuring of the STG for forest districts as well as standardization of administrative costs of the regional directorates of the State Forests using the source data from 2014. The source data for the administrative costs incurred by forest districts as well as the data on natural−forest conditions and annual economic tasks of forest districts were obtained from the State Forests Information System database for all forest districts in the country, the Bureau for Forest Management and Geodesy and the Forest Data Bank. Information on the social environment of forest districts was obtained from the Local Data Bank of the Central Statistical Office and the data on the number of cases of theft and damage to forests directly from forest districts. The obtained results indicate that the index value calculated for the regional directorates of the State Forests (RDSF) was determined by the number of subordinate forest districts and index values obtained by them. The highest STG value in 2014 was reported for: Katowice RDSF – 153.43, Szczecin RDSF – 145.2 and Wrocław RDSF – 128.7 points. The lowest STG value was recorded in the Warsaw RDSF – 49.39, Kraków RDSF – 53.14 and Gdańsk RDSF – 64.02 points. The calculated differences between the total administrative costs incurred by forest districts and the total standard administrative costs calculated on the basis of the mean value of 1 point of STG for forest districts in the State Forests for 2014 allowed dividing the regional directorates of the State Forests into two groups. The first one consists of 10 regional directorates, whose total actual administrative activity costs were lower than total standard administrative costs (negative values). The other group consists of 7 regional directorates, whose total standard administrative costs were lower than actual costs incurred in 2014 (positive values). STG indices for forest districts can be successfully used to standardize the total costs of forest districts. They should be a helpful tool in developing more objective methods of shaping the employment level in forest districts taking into account natural−forest conditions and economic tasks being implemented in these organizational units.

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The geographical distribution of the black locust (Robinia pseudoacacia L.) in Poland and its role on non-forest land

76%

Wojda T., Klisz M., Jastrzebowski S., Mionskowski M., Szyp-Borowska I., Szczygiel K.

Papers on Global Change

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2015

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tom 22

The black locust (Robinia pseudoacacia L.) has been present in Poland for more than 200 years now, its range coming to encompass the entire country, albeit with a particular concentration of occurrence in the west. Overall, it is present in 3.4% of the stands making up Poland’s “State Forests National Forest Holding” (Państwowe Gospodarstwo Leśne Lasy Państwowe), and is the dominant species in 0.1% of stands. Thanks to its producing durable wood of favourable energetic properties, this species is used in medium-rotation (≤ 40-year) plantations as well as in biomass energy plantations (where there is a 5–7-year rotation). In terms of its nectar production, the black locust is second only to lime as the Polish tree best serving the production of honey. While the species shows marked expansiveness in Poland, it has not thus far been placed on the list of aliens capable of threatening native species or natural habitats. Breeding of the species has been engaged in – if to only a limited extent – in Poland for some 20 years now, and 2 selected seed stands have been registered, as well as 34 plus trees and 2 seed orchards.

14

Radial growth of selected stands of black locust in Poland

76%

Klisz M., Ukalska J., Wojda T., Jastrzębowski S., Mionskowski M., Szyp-Borowska I.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

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tom 85

15

Podatność populacji jodły pospolitej na uszkodzenia od przymrozków późnych

76%

Klisz M., Jastrzebowski S., Ukalska J., Przybylski P., Matras J., Mionskowski M.

Leśne Prace Badawcze

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2016

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tom 77

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nr 1

16

Correlations between Brinell hardness and basic density in black locust - differences along the stem

76%

Klisz M., Ukalska J., Noskowiak A., Wojda T., Jastrzebowski S., Mionskowski M., Szyp-Borowska I.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2015

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tom 91

Ograniczanie wyników

Potencjalny zasięg klimatyczny jodły (Abies alba Mill.) w Polsce

Metoda standaryzacji kosztów administracyjnych nadleśnictw z wykorzystaniem stopnia trudności gospodarowania

Zagrożenie lasów Polski na podstawie modelu ryzyka uszkodzenia drzewostanu przez wiatr

Metody standaryzacji kosztów jednostkowych wybranych prac z zakresu hodowli lasu

Rozpad drzewostanów świerkowych w Beskidzie Żywieckim

Wielkoobszarowa inwentaryzacja stanu lasu źródłem informacji o powierzchni lasów w Polsce

Stopień uszkodzenia świerka, jodły i modrzewia w Sudetach Zachodnich

Model składu gatunkowego drzewostanu dla lasów w Sudetach z uwzględnieniem zmian klimatycznych

Wskaźnik stopnia trudności gospodarowania leśnictw Lasów Państwowych

Dynamika procesu zamierania drzew w Sudetach w latach 2002-2018

Podstawy planowania składu gatunkowego w lasach górskich na przykładzie Beskidu Niskiego

Określenie wielkości standardowych kosztów administracyjnych nadleśnictw na podstawie wskaźnika stopnia trudności gospodarowania

The geographical distribution of the black locust (Robinia pseudoacacia L.) in Poland and its role on non-forest land

Radial growth of selected stands of black locust in Poland

Podatność populacji jodły pospolitej na uszkodzenia od przymrozków późnych

Correlations between Brinell hardness and basic density in black locust - differences along the stem