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    Tytuł:
    Contribution to knowledge of fungal biota of Kampinos National Park (Poland): part 3
    Autorzy:
    Gierczyk, B.
    Szczepkowski, A.
    Slusarczyk, T.
    Kujawa, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2197178.pdf
    Data publikacji:
    2019-08-20
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    forest damage
    fire damage
    post-fire forest
    macromycete
    micromycete
    Basidiomycota
    Ascomycota
    Kampinos National Park
    Opis:
    We present interesting findings from the final year (2018) of the project concerning fungi in the fire-damaged forests in Kampinos National Park (central Poland). Seven taxa have been collected which are new to the park, one species (Scutellinia patagonica) hitherto unrecorded in Poland has been found. The current number of macromycetes taxa known from Kampinos National Park has reached 1,611.
    Źródło:
    Acta Mycologica; 2019, 54, 2; 1129
    0001-625X
    2353-074X
    Pojawia się w:
    Acta Mycologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model składu gatunkowego drzewostanu dla lasów w Sudetach z uwzględnieniem zmian klimatycznych
    Species composition model for the forests of the Sudety Mountains with regard to climate change
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Mionskowski, M.
    Brzeziecki, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/979139.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    abiotic and biotic factors
    climatic change
    forest damage
    forest functions
    stand composition
    Opis:
    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).
    Źródło:
    Sylwan; 2020, 164, 06; 454-466
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Urządzanie i monitoring lasu a ustalanie stref uszkodzenia lasu i stopni uszkodzenia drzewostanów
    Forest management and monitoring versus establishment of forest damage zones and degrees of stand damage
    Autorzy:
    Gołojuch, P.
    Beker, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/989694.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy
    monitoring
    uszkodzenia drzewostanow
    strefy uszkodzen lasu
    stopien uszkodzenia
    zagrozenia lasu
    forest damage
    management
    Opis:
    In years 1970−2002, in Poland forest damage zones were distinguished within the framework of forest management works. Since 2003 degrees of stand damage have been determined. This study presents basic characteristics of the methods employed for these purposes concerning the necessity to elaborate a new method of determination of degrees of stand damage. The establishment of forest damage zones and degrees of stand damage cannot be treated as one of the forms of monitoring because in order to determine their range, no observations on the permanent plots and – within their confines – on the same sample trees were and are carried out. Over the time, evaluation criteria or/and ways of establishment of the extent of damages have been undergoing considerable and significant methodological changes and modifications. In terms of dynamically altering quantitative and qualitative impact of different factors affecting forest environment, 10 years period of observation repeatability is far too long to use this information as an indicator of occurring changes. In practice, it was and it still is impossible to determine objectively trends and directions of changes taking place in a given object, which is one of the objectives of forest monitoring. The concept of damage zone should be understood not only as an area of grouping the stands of the same or similar damage, but, equally importantly, as those which happen to be under the influence of the same factor exerting its influence at the same level. Therefore, when determining the range of zones, the following three actions should be taken into consideration simultaneously: complex crown evaluation, dendrometric measurements and monitoring of the effect of the causative agent. In order to trace the trends of the changes on the study plots, the same sample trees must be subjected to evaluations and measurements. From the point of view of the time perspective, examinations should be carried out every 5 years (assessment of the crown condition and dendrometric measurements) or on a continuous basis (monitoring of the effect of the causative agent) irrespective of the forest taxation. It is also advisable to consider possible use of contemporary remote sensing techniques to determine the range of zones and degrees of damage, which preliminary can be used to establish the range, intensity and kind of the damages.
    Źródło:
    Sylwan; 2015, 159, 01; 13-21
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Satellite imagery for the improvement of SOZO database – the case study in Central Sudetes and High Sudetes
    Zobrazowania satelitarne jako źródło zasilenia tematycznej bazy danych przestrzennych SOZO – na przykładzie Sudetów Środkowych i Wysokich
    Autorzy:
    Kopańczyk, K.
    Fitrzyk, M..
    Powiązania:
    https://bibliotekanauki.pl/articles/341466.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Przyrodniczy we Wrocławiu
    Tematy:
    SOZO database
    vegetation indices
    polygon-based forest damage classe
    baza danych SOZO
    indeks wegetacyjny
    klasa degradacji lasów
    Opis:
    SOZO database and its cartographic model – a sozological map is a thematic data source that represents the state of natural environment, as well as the causes and effects of both positive and negative transformations occurring in the environment. There is no doubt that the SOZO database should be a tool to investigate and evaluate the state of natural environment in a quantitative manner. However, the analysis of chosen features in the database reveals that they seem to be insufficient for conducting spatial analysis. The crucial problem is related to classes of forest damage represented by point features in a database without the extent of forest degradation. This type of presentation has limited use for geospatial analysis of environment therefore the Authors propose to use remotely sensed data to enhance SOZO database with updated data together with the spatial occurrence of the studied phenomenon. This research presents the potentials of determining class of forest damage based on the vegetation indices (NDVI and NDII) that successfully replaces the point-feature class of forest damage with polygon-based classes, thereby introducing the new quality of the data into the environmental database and make SOZO database a useful product in spatial analysis.
    Tematyczna baza danych przestrzennych SOZO wraz z jej kartograficznym modelem – mapą sozologiczną przedstawia stan środowiska przyrodniczego, przyczyny i skutki zmian zachodzących w tym środowisku oraz formy i sposoby ochrony jego naturalnych wartości. Nie ulega wątpliwości, że baza SOZO powinna służyć do analizy i oceny stanu środowiska naturalnego w postaci wskaźników i miar ilościowych. Jednakże, analiza wybranych warstw bazy wskazuje na pewne jej braki, które sprawiają, że wykonanie analiz przestrzennych jest niemożliwe. Dotyczy to m.in. warstwy klasy degradacji lasów reprezentowanej w postaci geometrii punktowej bez określenia zasięgu tych klas. W pracy zaproponowano zastosowanie zobrazowań satelitarnych jako źródło aktualnych danych dodatkowo zasilających bazę w zasięg występowania badanego zjawiska. Klasy degradacji lasu określono na podstawie wskaźników wegetacyjnych (NDVI i NDII), któ- rych kombinacja pozwala wyznaczyć stopień i zasięg degradacji lasów w postaci obiektów powierzchniowych. Jest to niewątpliwie bardziej użyteczna forma, która czyni bazę SOZO w pełni funkcjonalną w zakresie analiz przestrzennych.
    Źródło:
    Acta Scientiarum Polonorum. Geodesia et Descriptio Terrarum; 2016, 15, 1-4; 5-18
    1644-0668
    Pojawia się w:
    Acta Scientiarum Polonorum. Geodesia et Descriptio Terrarum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie danych z satelity Sentinel-2 do szacowania rozmiaru szkód spowodowanych w lasach huraganowym wiatrem w sierpniu 2017 roku
    Assessment of forest damage caused by the August 2017 hurricane using Sentiel-2 satellite data
    Autorzy:
    Hościło, A.
    Lewandowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/986595.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy
    huragany
    szkody w lesie
    drzewostany pohuraganowe
    metody badan
    teledetekcja satelitarna
    satelita Sentinel-2
    forest damage
    windthrow
    remote sensing
    Opis:
    Extreme weather events such as hurricanes, floods or fires become more and more common phenomena in Europe. In August 2017, strong wind accompanied by heavy thunderstorms caused severe damage over the large area in central and western Poland. According to rapid damage assessment prepared by the State Forests authorities a few days after the windthrow, ca 79.7 thousand hectares of forest was damaged and 9.8 million of cubic meters of wood was lost. Assessment of such a large−scale forest damage is difficult without using the remote sensed data. In this study, we examined the potential of the European satellite Sentinel−2 data for assessment of the forest damage caused by the windthrow. The assessment was performed using a difference between a normalized difference moisture index (NDMI) calculated based on the pre− and post−damage Sentinel−2 images. NDMI was calculated based on NIR (824 nm) and SWIR (1610 nm) bands. The result of this study showed the total damage area in forest is equal to 35.8 thousand hectares, of which 27.7 thousand hectares was damaged within the State Forests and 8.1 thousand hectares outside the State Forests administration. These figures are much lower than the estimates by the State Forests, regarding the forest damage within the State Forests and higher comparing to estimations in the non−state forest. In fact, these figures are comparable with the heavily damage areas assigned to clearance by the State Forests. The accurate comparison of the results was not possible due to the lack of up−to−date information on forest damage. Sentinel−2 data revealed to be perfect data for large scale damage assessment and post−damage forest monitoring mainly due to the wide swath up to 290 km. The limitation of the optical sensors is the cloudiness. Unfortunately, in the case of this analysis, the first cloud free image was acquired 6 weeks after the windthrow. It reduces the potential of the single−source data for rapid assessment of damages.
    Źródło:
    Sylwan; 2018, 162, 08; 619-627
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Warunki meteorologiczne powstania szkód wiatrowych w dniach 11-12 sierpnia 2017 roku w lasach środkowo-zachodniej Polski
    Meteorological conditions of the occurrence of wind damage on August 11-12, 2017 in the forests of central-western Poland
    Autorzy:
    Chojnacka-Ożga, L.
    Ożga, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/986621.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy
    szkody w lesie
    szkody od wiatru
    warunki meteorologiczne
    wiatry
    Polska Srodkowo-Zachodnia
    mesoscale convective system
    wind gust
    forest damage
    Opis:
    Climate change, which was particularly marked at the turn of the 20th and 21st centuries, was accompanied by unfavourable weather phenomena. One of whose effects cannot be prevented is hurricane. Much of the most devastating storms (e.g. Kyrill in January 2007, Carmen in November 2010), which crossed over Poland, was associated with low pressure systems. The occurrence of high wind speeds in the cold season is a natural feature of Polish climate. Hurricanes in the summer are generally characterized by more complicated origin. The cause of the damage at this time of year may be squall fronts and tornados (e.g. July 4th, 2002 – Puszcza Piska; July 20th, 2007 – Częstochowa region). An important issue is to develop a category of winds for the forest district, which can have destructive effect on the stands. Current research shows that gusty winds exceeding 11 m/s may cause first damage to the trees, while blows with velocity exceeding 30 m/s result in severe damage. Knowing and monitoring the mechanisms that leads to strong winds, assessing their impact, and managing risk in the context of their effects is one of the important elements of a forest management strategy. On August 11th, 2017, after the influx of hot tropic air, much cooler polar air began to flow from the west. In the afternoon and evening storm cell and supercell began to form in the south−west of the country. Later on, they moved in the north direction forming a squall line. With a Mesoscale Convective System (MCS) moving to the north, there was a gusty wind exceeding 40 m/s in some places. A gust of wind occurred around 18.30 (EET) in Dolny Śląsk (SW Poland) and after about 2 hours in Pomerania (N Poland). The pressure tendency during the transition reached 4−5 hPa. In the northern part of the country, gusts of wind were the largest and occurred several times in 2−3 hours. The system was accompanied by heavy precipitations, which in north Poland determine more than 60% of the average monthly rainfall. The effect of moving MCS was the damage of almost 80 thousand hectares of forests in Poland, which of more than 39 thousand hectares were classified to complete restoration.
    Źródło:
    Sylwan; 2018, 162, 03; 200-208
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mapping of windstorm damage occurring in the forest stands of Czerniejewo forest district (Polish State Forests National Holding) using aerial photographs and sentinel-2 satellite imagery
    Wykorzystanie ortofotomap lotniczych oraz zobrazowań satelitarnych Sentinel-2 w procesie określania uszkodzeń drzewostanów w Nadleśnictwie Czerniejewo (RDLP Poznań) spowodowanych przez huragan
    Autorzy:
    Krawczyk, Wojciech
    Wężyk, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/28407807.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Geodetów Polskich
    Tematy:
    hurricane
    forest stands damage assessment
    aerial orthophoto
    Sentinel-2
    nawałnica
    określanie zasięgu uszkodzeń drzewostanów
    ortofotomapa lotnicza
    Opis:
    On the night of 11 and 12.08.2017 a severe hurricane passed over Poland, in a belt of almost 300 km, causing damage in forest stands of area exceeding 100 000 ha. The study aimed to demonstrate the implementation of remote sensing technologies in the process of determining the extent of forest stand damages in the Czerniejewo Forest District (RDLP Poznań) caused by wind and monitoring the progress of clean-up work. In this study were used digital aerial orthophotos commissioned by the State Forests National Forest Holding (PGL LP) and Sentinel-2 (ESA) satellite images as well. The area of damaged stands was determined with the use of two approaches, i.e.: supervised classification (approach A) and thresholding of values of Normalised Difference Vegetation Index - NDVI (approach B). The obtained results were compared to reference data obtained by visual interpretation of high resolution RGB aerial orthophotos by RDLP Poznań experts. Monitoring of the progress of the clean-up works in damaged stands was carried out in 9-time intervals. The conducted image classification and spatial GIS analyses showed that the area of stands damaged by the wind was for methods A and B: 579.16 ha and 516.01 ha, respectively, with 631.00 ha as the reference. The results obtained in the study indicate errors in underestimating the area of forest stand damage based on Sentinel-2, i.e.: 51.84 ha (8.2%) in the case of method A and by 114.99 ha (18.2%) for method B. In the whole analysed time, clean-up operations were carried out on the total area of 762.33 ha of damaged forest stands, and their highest intensity was observed in the first 4 months after the storm. The work showed the applicability of free of charge Sentinel-2 (ESA) satellite imagery in the process of determining the extent of forest stand damages, pointing to the supervised classification method (Maximum Likelihood algorithm; ML) as more accurate than using the threshold of NDVI.
    W nocy 11/12.08.2017 nad Polską, w pasie o długości niemal 300 km, przeszła bardzo silna nawałnica powodując zniszczenia drzewostanów na obszarze 100 000 ha. Celem prezentowanej pracy było zademonstrowanie implementacji technologii teledetekcyjnych w procesie określania zasięgu uszkodzeń drzewostanów w Nadleśnictwie Czerniejewo (RDLP Poznań) spowodowanych przez wiatr oraz monitorowania postępu prac uprzątających. W pracy wykorzystano wykonane na zlecenie PGL Lasy Państwowe cyfrowe ortofotomapy lotnicze, a także zobrazowania satelitarne z misji Sentinel-2 (ESA). Powierzchnię uszkodzonych drzewostanów określano dwoma metodami, tj.: klasyfikacji nadzorowanej - metoda A oraz progowania wartości znormalizowanego wskaźnika roślinności (NDVI) - metoda B. Otrzymane wyniki porównano do danych referencyjnych uzyskanych na drodze interpretacji wzrokowej wysokorozdzielczych ortofotomap lotniczych RGB dokonanych przez ekspertów RDLP Poznań. Monitorowania postępu prac uprzątających prowadzonych w zniszczonych drzewostanach dokonano w 9 przedziałach czasowych. Analizy przestrzenne GIS wykazały, iż powierzchnia uszkodzonych przez wiatr drzewostanów wyniosła dla metody A oraz B, odpowiednio: 579.16 ha oraz 516.01 ha, przy czym za referencję przyjęto 631.00 ha. Uzyskane w pracy wyniki wskazują na błędy niedoszacowania obszaru zniszczeń drzewostanów, tj.: 51.84 ha (8.2%) dla metody A oraz o 114.99 ha (18.2 %) dla metody B. W ciągu całego analizowanego okresu prace uprzątające wykonano na łącznej powierzchni 762.33 ha uszkodzonych drzewostanów, przy czym największą ich intensywność stwierdzono w pierwszym okresie 4 miesięcy po wystąpieniu nawałnicy. Praca wykazała przydatność nieodpłatnych zobrazowań satelitarnych Sentinel-2 (ESA) w procesie określania zasięgu uszkodzeń drzewostanów, wskazując na metodę klasyfikacji nadzorowanej (algorytm maksymalnego prawdopodobieństwa) jako dokładniejszą, niż korzystanie z wartości wskaźnika roślinnego NDVI.
    Źródło:
    Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2020, 32; 13--35
    2083-2214
    2391-9477
    Pojawia się w:
    Archiwum Fotogrametrii, Kartografii i Teledetekcji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Współczesne teledetekcyjne metody inwentaryzacji stanu lasu po huraganie
    Autorzy:
    Mozgawa, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1023546.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    szkody w lesie
    metody badan
    szkody huraganowe
    lasy
    teledetekcja satelitarna
    lesnictwo
    inwentaryzacja szkod
    system IACS
    remote sensing
    aerial photography
    high−resolution satellite imagery
    inventory of forest damage
    windstorm
    iacs system
    Opis:
    Forest areas suffering acute damage from wind storms can be successfully monitored by applying remote sensing techniques using special panchromatic aerial photography and available traditional colour satellite imagery with a terrestrial resolution not less than 5 m. Orthophotomaps and satellite images collected for the needs of the IACS system provide important information about forest damage caused by heavy storms. It is essential to create spatial information system for the efficient collection, processing and access to spatial environment and forest−related information about areas affected by the disaster.
    Źródło:
    Sylwan; 2004, 148, 02; 52-60
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ wybranych czynników środowiskowych na szkody wyrządzane przez zwierzynę w lasach Lubelszczyzny
    Autorzy:
    Drozd, L.
    Tyrawski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1022054.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    zwierzeta lowne
    czynniki srodowiska
    jelenie
    lasy
    losie
    lesnictwo
    sarny
    szkody lowieckie
    wild ruminants
    damage to forest caused by wildlife
    Opis:
    The purpose of the study was to evaluate the influence of selected environmental factors on the extent of damage caused by wild ruminants in plantations and thickets. The environmental factors were: fragmentation of forest complexes, the share of age classes in stands, the share of deciduous species, the size of felled forests and restocked area.
    Źródło:
    Sylwan; 2005, 149, 10; 67-72
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Contribution to knowledge of the mycobiota of Kampinos National Park (Poland): part 2
    Autorzy:
    Gierczyk, B.
    Szczepkowski, A.
    Ślusarczyk, T.
    Kujawa, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2196349.pdf
    Data publikacji:
    2019-06-13
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    mycobiota
    fire damage
    pine forest
    Ascomycota
    Basidiomycota
    Kampinos National Park
    Polska
    Opis:
    Continuation of the mycological study of the fire-damaged pine forest in Kampinos National Park in central Poland in 2017 produced interesting new findings. Among the taxa collected, 36 were new to the park, six had not been hitherto reported from Poland (Calycellina araneocincta, Ciliolarina aff. laetifica, Clitocybe metachroides, Galerina cerina f. longicystis, Parasola cuniculorum, Pleonectria pinicola), and the previous status of one taxon (Pleonectria cucurbitula) had been uncertain. Short descriptions based on collected specimens have been prepared for all taxa new to Poland. The current number of taxa of macromycetes identified in Kampinos National Park has reached 1,604.
    Źródło:
    Acta Mycologica; 2019, 54, 1; 1116
    0001-625X
    2353-074X
    Pojawia się w:
    Acta Mycologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aktywność enzymatyczna gleb na obszarach sztucznej i naturalnej regeneracji lasu po klęsce huraganu w północno-wschodniej Polsce
    Soil enzymatic activity in artificially and naturally regenerated forests after wind damage in north-eastern Poland
    Autorzy:
    Olszowska, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1294052.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    tereny pohuraganowe
    drzewostany sosnowe
    gleby lesne
    ureaza
    dehydrogenazy
    aktywnosc enzymatyczna
    wind damage
    urease
    dehydrogenases
    forest soils
    Opis:
    The aim of the study was to describe biochemical reactions in the soil based on the activity of urease and dehydrogenases in Scots pine stands damaged during and differentially managed after hurricanes. Soil enzymatic activity was investigated in 2005 and again in 2013 for selected stands in the Pisz Forest District where wind damage occurred in 2002. Most of the damaged stands were cut down and replanted, but 445 ha were left untouched for study purposes. The investigated areas differed with respect to stand damage and management. The enzymatic activity correlated well with the content of organic matter which was higher in organic than in mineral soils. In the area left to regenerate naturally, dehydrogenase and urease activity was higher in 2013 compared to 2005, which suggests the improvement of site conditions. The values of the examined biochemical parameters were correlated with the type of forest regeneration, with the forest soil regeneration being higher in artificially than in naturally regenerated stands. Changes of soil enzymatic activity were correlated with the level of stand damage and the type of management after wind damage.
    Źródło:
    Leśne Prace Badawcze; 2016, 77, 2
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ryzyko powstawania szkód w drzewostanach poszczególnych nadleśnictw Polski
    Risk of damage to stands in individual forest districts in Poland
    Autorzy:
    Bruchwald, A.
    Dmyterko, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/995538.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Panstwowe Gospodarstwo Lesne Lasy Panstwowe
    nadlesnictwa
    uszkodzenia drzewostanow
    szkody w lesie
    ryzyko wystapienia
    zroznicowanie regionalne
    wspolczynniki reginalnego ryzyka uszkodzenia drzewostanow
    stand damage risk model
    stand damage risk factor
    regional damage risk factor
    forest district
    Opis:
    In the study, regional stand damage risk factors were developed for individual forest districts in Poland. For this purpose we used the materials contained in the database of the State Forests Information System (SILP), which relate to the volume of wood obtained from windfalls and deadwood in all forest districts in Poland in the years 2005−2010. The criterion proposed was the maximum annual damage during the period under review expressed as volume of wood obtained from wind−thrown and wind−broken trees, as well as deadwood per hectare of forest stands older than 40 years in a forest district. This allowed to assign regional damage risk factor values to individual units. They range from 0, corresponding to a very low damage risk to stands, to 4, indicating a very high risk. Presented map of the regional stand damage risk factors for the forest districts in Poland is the graphic result of the analysis.
    Źródło:
    Sylwan; 2012, 156, 01; 19-27
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stan, warunki i problemy odnowienia naturalnego sosny w Puszczy Białowieskiej
    The state, conditions and problems of pine natural regeneration in the Białowieża Forest
    Autorzy:
    Paluch, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1023646.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany sosnowe
    Pinus
    sosna
    lesnictwo
    odnowienia naturalne
    Puszcza Bialowieska
    drzewa lesne
    pine
    natural regeneration
    białowieża forest
    damage
    game
    fencing
    Opis:
    The paper discusses conditions and problems concerning natural regeneration of pine in the „Puszcza Białowieska” Promotional Forest Complex. The studies on pine regeneration established from self−seeding were carried out on permanent experimental plots occupied by fresh and fresh mixed coniferous forests site types. A space filling index used in the experiment was to define space occupied by pine regeneration the so−called „height sum”. A significance test of differences in mean values between the abundance and height sum (t−Student's test) was used for each experimental variant within the forests site types. Natural regeneration in the Białowieża Forest occurs infrequently. It can be found mainly in loose pine stands growing in fresh coniferous forest site types. Pine naturally regenerates most successfully in fresh and fresh mixed coniferous forest site types, on fenced clear−cuts with a few reserved trees, with soil prepared in furrows and well−performed tending treatments, as well as in pine stands with stocking 0.4 providing that the same conditions are maintained. The primary condition for successful natural regeneration of pine in the Białowieża Forest is its protection against animals in the form of fencing.
    Źródło:
    Sylwan; 2004, 148, 11; 9-21
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zagrożenie lasu przez wiatr na przykładzie nadleśnictw Puszczy Białowieskiej
    Risk of wind damage to stands on the example of selected forest districts in the Bialowieza Primeval Forest
    Autorzy:
    Bruchwald, A.
    Dmyterko, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1008781.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Bialowieska
    nadlesnictwa
    Nadlesnictwo Browsk
    Nadlesnictwo Bialowieza
    Nadlesnictwo Hajnowka
    lasy
    zagrozenia lasu
    wiatry
    uszkodzenia drzewostanow
    ryzyko uszkodzenia
    modele ryzyka uszkodzenia
    stand damage risk model
    stand damage risk factor
    wind
    białowieża primeval forest
    Opis:
    Stand damage risk model was applied to three forest districts located in the Białowieża Primeval Forest: Browsk, Hajnówka and Białowieża. For this purpose, information contained in the database of the State Forests Information System was used. The obtained values of the stand damage risk factor allowed assigning each stand to one of the six risk classes. Higher class indicates higher damage risk to stands. The share of the stand area was calculated for each class. The weighted average of the areal shares of stands in the two highest damage risk factor classes was used as a measure of wind damage risk to forests. The values of this measure for individual forest districts were as follows: Browsk – 27.3%, Hajnówka – 33.0%, Białowieża – 38.3%. The degree of risk to these forests ranges from average to high, which is mainly because of large proportion of the high, old−growth spruce stands. Forest stands of the Białowieża Primeval Forest with a high risk factor are threatened by damage in the event of strong winds in this area.
    Źródło:
    Sylwan; 2012, 156, 10; 750-764
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kluczowe problemy współczesnego leśnictwa
    Key issues in the forest sector today
    Autorzy:
    Płotkowski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1023661.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    zalesianie
    gospodarka lesna
    odnowienia lasu
    lasy ochronne
    plantacje drzew lesnych
    zasoby lesne
    lesnictwo
    wylesienia
    pine
    natural regeneration
    białowieża forest
    damage
    game
    fencing
    Opis:
    The paper discusses conditions and problems concerning natural regeneration of pine in the „Puszcza Białowieska” Promotional Forest Complex. The studies on pine regeneration established from self−seeding were carried out on permanent experimental plots occupied by fresh and fresh mixed coniferous forests site types. A space filling index used in the experiment was to define space occupied by pine regeneration the so−called „height sum”. A significance test of differences in mean values between the abundance and height sum (t−Student's test) was used for each experimental variant within the forests site types. Natural regeneration in the Białowieża Forest occurs infrequently. It can be found mainly in loose pine stands growing in fresh coniferous forest site types. Pine naturally regenerates most successfully in fresh and fresh mixed coniferous forest site types, on fenced clear−cuts with a few reserved trees, with soil prepared in furrows and well−performed tending treatments, as well as in pine stands with stocking 0.4 providing that the same conditions are maintained. The primary condition for successful natural regeneration of pine in the Białowieża Forest is its protection against animals in the form of fencing.
    Źródło:
    Sylwan; 2004, 148, 11; 22-36
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uszkodzenia drzew w górskich przedrębnych drzewostanach sosnowych
    Tree damage in premature mountain Scots pine stands
    Autorzy:
    Zastocki, D.
    Walczak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/973750.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany sosnowe
    uszkodzenia drzew
    pozyskiwanie drewna
    zrywka drewna
    szlaki zrywkowe
    leśnictwo
    lasy górskie
    drzewostany przedrębne
    mountain forests
    stand damage
    private forest firms
    Opis:
    The aim of the study is to evaluate the selected methods and technological processes of wood harvesting used by Forest Service Enterprises and analyse the impact of the adopted solutions on the selected elements of the forest environment. The study is limited to a detailed analysis of the extent of damage to trees retained in stands caused by extraction during late thinning operations carried out under difficult mountain conditions. Analysed stands with pine as a dominant tree species (its percentage share exceeding 70%) aged 41−60 years and grew on the mountain forest habitat. Wood was harvested using the assortment method and skidded by the adapted farm tractors and specialized skidders, such as Kockums 812 and VFA.
    Źródło:
    Sylwan; 2011, 155, 09; 642-650
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gospodarka leśna w obliczu potrzeb ochrony przyrody.
    Forest menagement in view of needs of the conseration of natural.
    Autorzy:
    Machoń, Mirosław
    Powiązania:
    https://bibliotekanauki.pl/articles/443380.pdf
    Data publikacji:
    2013
    Wydawca:
    Wyższa Szkoła Humanitas
    Tematy:
    gospodarka leśna
    ochrona przyrody
    zrównoważony rozwój
    odpowiedzialność za szkody
    wykroczenia.
    forest management
    the conservation of nature
    sustainable development
    responsibility for the damage
    offences
    Opis:
    Lasami państwowymi w Polsce w imieniu Skarbu Państwa zarządza Państwowe Gospodarstwo Leśne Lasy Państwowe, jako statio fisci. W ramach zarządu Lasy winny prowadzić trwale zrównoważoną gospodarkę leśną. Las jako jeden z najważniejszych komponentów środowiska przyrodniczego, obok pozyskania drewna, ma do spełnienia przede wszystkim funkcje społeczne jak również ochrony przyrody. Szeroko i prawidłowo rozumiana ochrona przyrody, nie jest jednak tożsama z gospodarką leśną, gdzie funkcje gospodarcze i pozyskanie drewna są działaniami wiodącymi.
    In Poland, on behalf of the state treasury, a National Forest Household is managing National Forests, as statio fisci. In frames of the management board Forests should lead the sustainable forest management permanently. Forest, as one of the most important components of the natural environment, besides acquiring wood has, above all, social functions as well as the conservations of nature to fulfill. Widely and correctly understood conservation of nature is not identical with the forest management, where economic functions and acquiring wood are leading actions.
    Źródło:
    Roczniki Administracji i Prawa; 2013, 13; 155-171
    1644-9126
    Pojawia się w:
    Roczniki Administracji i Prawa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forest functions and abiotic threats in private forests : conclusions from an empirical analysis of stakeholder opinions
    Funkcje lasu i zagrożenia abiotyczne w lasach prywatnych: wnioski z empirycznej analizy opinii interesariuszy
    Autorzy:
    Wysocka-Fijorek, Emilia
    Gołos, Piotr
    Gil, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/2172308.pdf
    Data publikacji:
    2022
    Wydawca:
    Fundacja Ekonomistów Środowiska i Zasobów Naturalnych
    Tematy:
    public forest function
    timber production
    weather phenomena
    abiotic damage
    social research
    stakeholder
    funkcja lasu publicznego
    produkcja drewna
    zjawiska pogodowe
    uszkodzenie abiotyczne
    badanie społeczne
    interesariusz
    Opis:
    The study aimed to recognise the preferences of various stakeholder groups representing three regions of Poland towards the most important forest ecosystem services and to determine the threats to performing these functions resulting from the occurrence of extreme weather phenomena. The study was based on surveys conducted in 2019 among various stakeholders in three regions of Poland. The respondents assigned a point weight value to each of the seven indicated forest functions and reported the occurrence of extreme weather events causing damage to forests owned or supervised by them. The survey results indicate that for all stakeholders, the most important function of the forest is timber production. However, respondents from the southern region paid more attention to water protection through forests than respondents from other regions.
    Celem artykułu jest określenie preferencji różnych grup interesariuszy reprezentujących trzy regiony Polski wobec najważniejszych leśnych usług ekosystemowych oraz określenie zagrożeń dla pełnienia tych funkcji wynikających z występowania ekstremalnych zjawisk pogodowych. Opinie zostały zebrane w badaniach ankietowych przeprowadzonych w 2019 r. Respondenci przypisali wartość wagową każdej z siedmiu wymienionych funkcji lasu oraz zgłaszali występowanie ekstremalnych zjawisk pogodowych powodujących szkody w lasach będących ich własnością lub przez nich nadzorowanych. Wyniki oceny istotności funkcji wskazują, że dla przedstawicieli wszystkich grup interesariuszy najważniejszą funkcją lasu była produkcja drewna. Respondenci z regionu południowego przykładali większą wagę do ochrony wód przez lasy, niż respondenci z innych regionów.
    Źródło:
    Ekonomia i Środowisko; 2022, 3; 342--360
    0867-8898
    Pojawia się w:
    Ekonomia i Środowisko
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ stosowanych technologii pozyskiwania drewna przez Zakłady Usług Leśnych na obecną i przyszłą jakość techniczną sosnowych drzewostanów przedrębnych
    The effect of harvesting systems used by Forest Services Companies on the present and future technical quality of premature pine stands
    Autorzy:
    Zastocki, D
    Powiązania:
    https://bibliotekanauki.pl/articles/1026391.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany sosnowe
    drzewostany
    metody pozyskiwania drewna
    uzytkowanie lasu
    Zaklady Uslug Lesnych
    lesnictwo
    jakosc
    drzewostany przedrebne
    pozyskiwanie drewna
    forest services companies
    stand damage
    thinnings
    kraft class
    harvesting system
    poland
    Opis:
    The aim of the paper is to determine the degree of damage of trees in a stand in the Kraft classes and diameters at breast height of trees in the damaged and undamaged stands depending on the harvesting system applied by Forest Services Companies. Field studies were carried out in the Polish lowlands in pine stands in the age classes II a, III a and IV a in the fresh forest habitat (Bśw) and mixed fresh forest habitat (BMśw). The prevailing species is pine (minimum 80%), and the assortment and tree−length methods are used for timber harvest. The thinning operations cause injuries to trees in the remaining stands and the scale of these injuries depends mainly on labour organisation.
    Źródło:
    Sylwan; 2003, 147, 03; 28-34
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ wód odciekowych z odpadów wydobywczych na poziom zanieczyszczenia gleby leśnej oraz możliwości jej dalszego użytkowania przez gospodarkę leśną
    Effect of water leaking from exploitation wastes on contamination of forest soil and possibility of its further utilisation
    Autorzy:
    Cieśla, A.
    Gil, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/987142.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy
    zanieczyszczenia gleb
    wody odciekowe
    szkody przemyslowe
    uszkodzenia drzewostanow
    gleby lesne
    wlasciwosci chemiczne
    zasolenie gleb
    chlorki
    siarczany
    samooczyszczanie
    rekultywacja terenow
    industrial damage
    soil salinity
    chlorides
    sulphates
    forest reclamation
    Opis:
    Forestry management in anthropo−transformed habitats is characterized by a very high risk. The formation of waste as well as flooding of tree stands by salty water from different sources of mining and processing of coal is an important issue on the industrial areas. The introduction of the pollution load in the form of saline water leads to increased soil salinity, which can damage or cause the dieback of individual trees, tree stands and whole forest ecosystems. The aim of the research was to (i) analyze the changes in forest soils on the area flooded by water leaked from the waste reservoir, (ii) assess the possibility of this soil self−purification from chlorides and sulfates and (iii) estimate the possibility of reclamation of this land for forestry purposes. The study was conducted in Katowice Forest District (southern Poland). Soil samples for physico−chemical analysis were collected in 2015. The results of chemical analyzes of surface soil layers made in 2013 and 2014 were also used. The content of chlorides and sulphates in the soil was used as one of the key indicators to assess the level of soil salinity. In the year of the damage occurrence, in surface horizons it significantly exceeded the threshold value, but declined in subsequent years to a level below this value even in the area of the greatest damage. However, our analysis indicate an accumulation of chlorides and sulphates in the soil at a depth of 100−120 cm, as well as the accumulation of sodium cations. This demonstrates the difficulties with the self−purification of soil or continuous supply of pollutants from the waste reservoir. Currently, surface soil horizons meet the criteria of not−salinized soils, which does not indicate a need for change in land use. After the surface preparation and technical work used in forestry practice, the damaged area can be designed for the reintroduction of forest trees.
    Źródło:
    Sylwan; 2017, 161, 07; 573-582
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przydatność Emolu Plus BTX LA do ochrony sosny zwyczajnej przed zimowym zgryzaniem przez jeleniowate
    The usefulness of repellent Emol Plus BTX LA in Scots pine saplings protection against winter browsing by deer
    Autorzy:
    Nasiadka, P.
    Pudełko, M.
    Umiński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1023356.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    ochrona roslin
    Emol Plus BTX LA
    skutecznosc
    ochrona lasu
    sosna zwyczajna
    lesnictwo
    repelenty
    Pinus sylvestris
    drzewa lesne
    emol
    emol plus btx la
    scots pine
    pinus sylvestris
    browsing
    forest protection against wildlife
    damage by widlife.
    Opis:
    The paper provides study results on the efficacy of Emol Plus BTX LA repellent used for the protection of Scots pine saplings against browsing by deer. Emol Plus BTX LA contains coarse−grained filler – calcium carbonate and denatonium benzoate (BTX) as active substance. The efficacy of both Emol Plus BTX LA and standard repellents were found to be high.
    Źródło:
    Sylwan; 2004, 148, 10; 59-66
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany zachodzące w drzewostanach Bieszczadów
    Changes in the forests of the Bieszczady Mts.
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/985915.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy gorskie
    Bieszczady
    drzewostany
    sklad gatunkowy
    zmiany w drzewostanach
    zmiany skladu gatunkowego
    model wzrostu drzewostanu
    modele ryzyka uszkodzenia
    species composition
    stand growth model
    model allowable cut
    wind damage risk model
    forest threat
    measure
    Opis:
    The aim of the study was to analyse (on the basis of the data from the State Forests Information System) the changes occurring in the Bieszczady forests in the period of 2007−2016. One of the processes taking place in the study area is the withdrawal of grey alder stands and the appear− ance of natural regeneration of mainly beech and fir, and in a smaller proportion spruce (fig. 1). Another natural process is the encroachment of fir and beech under the canopy of pine stands, which is favoured by fertile habitats that meet the ecological requirements of these two tree species. As a result of economic activity supporting these processes, alder and pine stands are being rebuilt relatively quickly, turning into fir or beech stands, and sometimes into mixed stands with the participation of other tree species, including spruce (fig. 1). The decline of spruce stands occurs on the dominant area in Poland: in Beskid Śląski and Beskid Żywiecki, the Kaszuby Forest or the Białowieża Forest. The main causes of this process are abiotic and biotic factors, including frequent droughts causing the lowering of the groundwater level and insect outbreaks, especially of bark beetles. The proportion of spruce in the Bieszczady Mountains is relatively small (about 10%), and the high fertility of the habitats compensates, to some extent, the relatively high moisture requirements of this tree species and probably these factors determined the lack of decline of spruce stands in the analysed area. In the last 10 years, the average age of forests in the Bieszczady Mountains increased from 77 to 83 years (tab. 2), mainly as a result of too low volume of harvested timber (fig. 3). Comparing the total harvested volume with the volume of allowable cut determined by the stand growth model, the harvest of the wood raw material was understated by about 25%. The aging of forests is also confirmed by changes in stands in age classes (fig. 2). The aging of the Bieszczady forests is correlated with the process of increasing the threat to these forests by wind (figs. 4−5). The wind damage risk factor increased over the next 10 years in the two highest threat level, and thus the area of threatened stands increased. The forest threat measure in the Bieszczady forests increased in general as well as in individual forest districts (fig. 6). The forests in two of these districts are currently among the most threatened in Poland.
    Źródło:
    Sylwan; 2018, 162, 05; 355-364
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie modelu ryzyka uszkodzenia drzewostanu przez wiatr do oceny procesu śmiertelności drzew w Sudetach w latach 2015-2017
    Application of the wind damage risk model for the assessment of tree mortality in the Sudety Mts. in 2015-2017 period
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/979365.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Sudety
    drzewostany
    wiatry
    szkody w lesie
    ryzyko uszkodzenia
    modele ryzyka uszkodzenia
    zamieranie drzew
    czynniki klimatyczne
    lata 2015-2017
    leśnictwo
    drzewa leśne
    RDLP Wrocław
    tree mortality
    critical value of deadwood harvest
    wind damage risk model
    forest threat measure
    Opis:
    A dynamic process of mortality of Norway spruce stands in south−west Poland, mainly in the Sudety Mts. was observed in 2015. It was associated with an insufficient amount of precipitation in the growing season. This process was intensified by the outbreak of insects, especially bark beetles. The aim of the paper was to verify the hypothesis that the application of the stand damage risk model allows to identify stands, which may possibly be predisposed to mortality, after a long−lasting drought in the growing season. The studies concerned the forests of the Wrocław Regional Directorate of State Forests (tab. 1). Their area covers 245,000 ha, the timber volume amounts to 83 million m3 (338 m3/ha) and the volume increment to 2.3 million m3 (9.4 m3/year/ha). The fraction of spruce is the largest (50.3%), ranging from 7.1% (Pieńsk Forest District) to 84.8% (Lądek−Zdrój Forest District). The average age of stands is 74 years, ranging from 56 (Pieńsk Forest District) to 85 years (Jawor Forest District). The drought in 2015 caused an increase in the dynamics of spruce decline. The ratio of harvested to model deadwood volume at a level of up to 5% was assumed the ‘norm’ that characterizes the process of natural spruce mortality. Values higher than normal mean a more intense process of tree mortality caused by external factors (e.g. hurricane winds, floods, droughts). In 2014, the harvested deadwood was below the norm in 15 forest districts (fig. 1). In 2015, the highest ratio values (above 20%) were reported in the Wałbrzych and Szklarska Poręba forest districts (fig. 1). In 2016, the harvest of deadwood in each forest district exceeded the norm, and the highest values were found in the Jawor (102.3%), Bardo Śląskie (83.3%) and Świdnica (69.7%) forest districts. In 2017, the highest ratios of harvested to model deadwood volume were reported in the Bardo Śląskie (117.2%), Jawor (83.6%), Henryków (83.5%) and Świdnica (67.1%) forest districts. The model was found to identify also the stands that are most threatened by droughts. These are stands in the highest damage risk factor Wr class. The highest percentage of deadwood in this damage class was in Jawor (88.8%), Bardo Śląskie (81.9%), Miękinia (79.4%), Świdnica (76.7%), Henryków (73.8) and Złotoryja (73.6%) forest districts. It was also shown that the average value of the measure of threat to forests Ms was 35, qualifying them as highly threatened (fig. 3). Forests characterized by the highest level of threat Ms>40 was found in five forest districts, while in nine others the level of threat was high. The forests of the Sudety Mts. are threatened by the decline and the main direct causes of this process was the long−lasting drought in the growing season, causing damage to the stands earlier weakened by wind and other factors.
    Źródło:
    Sylwan; 2019, 163, 11; 903-912
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamika rozpadu drzewostanów świerkowych w Beskidzie Śląskim
    Decline of Norway spruce stands in the Beskid Slaski Mts.
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/986624.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Beskid Slaski
    drzewostany swierkowe
    zamieranie drzew
    swierk pospolity
    Picea abies
    rozpad drzewostanow
    System Informatyczny Lasow Panstwowych
    model wzrostu drzewostanu
    rozmiar uzytkowania rebnego
    zagrozenia lasu
    szkody od wiatru
    modele ryzyka uszkodzenia
    Nadlesnictwo Wisla
    Nadlesnictwo Wegierska Gorka
    Nadlesnictwo Ustron
    Nadlesnictwo Bielsko
    forest decline
    picea abies
    stand growth model
    harvest volume model
    wind damage risk model
    forest
    threat measure
    Opis:
    The dynamics of decline of Norway spruce forests in the Beskid Śląski Mts. (S Poland) in a 2007−2016 period was analysed based on data from the State Forests Information System. For that purpose we used modified growth model and wind damage risk model. The harvested timber volume (salvage cuts) exceeded the allowable harvest modeled with the stand growth model by 270% in years 2007−2010 (earlier period) and by 89% in the 2011−2016 (later period) period. The highest volume exceed (503 and 307% for earlier and later period respectively) was recorded for the Wisła Forest District. For the deadwood, the harvested volume exceeded the modeled one by 45% (162 in earlier, and 59% in later period). In the Węgierska Górka Forest District the harvested volume amounted to 287% of the modeled one (438 in earlier, and 70% in later period). The largest amount of wind−broken and wind−fallen trees was found in Wisła. Their volume amounted to 48% of the modeled volume (59 in earlier, and 40% in later period). The highest exceed occurred in Węgierska Górka (89 and 70% in the later period respectively). The species composition in the analysed region changed significantly as the share of spruce decreased and share of beech and fir increased (tab. 1). Changes in the aeral fraction of stands in age classes in the Bielsko and Ustroń forest districts were insignificant (tab. 2). For Węgierska Górka, share of stands in age class <20 years increased from 11 to 40%, while the older stands fraction decreased. Major changes occurred in Węgierska Górka and Wisła as far as structure of the stands in the risk damage factor classes is concerned. Fraction for the risk factor classes I and II increased, while for class VI decreased (tab. 3, fig. 4). The highest dynamics of the wind threat measure was recorded especially in Węgierska Górka, where its value decreased from 42 in 2009 to 19 in 2016 (fig. 5). The biggest changes are likely to occur in Wisła in the next years due to the very high fraction of spruce. A significant damage caused by wind may also be expected in Ustroń, where the threat measure is high.
    Źródło:
    Sylwan; 2018, 162, 03; 189-199
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena wpływu roślinożernych ssaków kopytnych na odnowienie lasu w Białowieskim Parku Narodowym
    The impact of herbivorous ungulates on forest regeneration in the Białowieża National Park
    Autorzy:
    Kweczlich, I.
    Miścicki, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1023208.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    szkody w lesie
    oddzialywanie na srodowisko
    odnowienia lasu
    metody badan
    Alces alces
    lesnictwo
    Bialowieski Park Narodowy
    jelen europejski
    ssaki kopytne
    Bison bonasus
    los
    zubr
    Capreolus capreolus
    Cervus elaphus
    sarna
    ungulate herbivores
    forest regeneration
    damage
    development
    comparative sample plots
    białowieża
    national park
    strict protection
    Opis:
    Measurement results carried out on 30 comparative sample plots in 2000−2002 demonstrated negative effect of ungulate herbivores on the development of forest regeneration in the strictly protected area the Białowieża National Park. The tree height index permitted to state that cervidas and bisons were the damage−causing agents. Other indices (density, tree height sum and species diversity) were insufficient to assess the effect of wild boars.
    Źródło:
    Sylwan; 2004, 148, 06; 18-29
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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