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Tytuł:
Plan urządzenia lasu w Polsce - problemy i kierunki rozwoju
Forest management plan in Poland - problems and development directions
Autorzy:
Jaszczak, R.
Bankowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/2142636.pdf
Data publikacji:
2020
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
mountain forests
urban forests
experimental forests
private forests
social factor
economic factor
lasy górskie
lasy miejskie
lasy doświadczalne
lasy prywatne
czynnik społeczny
czynnik ekonomiczny
Opis:
nowadays, improving forest management is done by way of amendments to the forest management instructions, silvicultural rules and forest protection instructions. From the point of view of forest management, the most important is the forest management plan, the basic document prepared for a specific object, containing a description and assessment of the state of the forest, as well as the objectives, tasks and ways of forest management. Before each subsequent revision of the forest management guidelines, new instructions are developed in consultation with the public, based on discussions on the proposed changes that are in each case to serve as the best plan for forest management. the forest management plan is vital as it ties together silviculture, conservation, production and non-production purposes as well as social forestry tasks, but only if the primary and operational nature of the objectives considered at the stage of creating the plan are recognized. therefore, the role of forest management in shaping and protecting the environment cannot be overestimated. In this work, we outline the basic principles and rights related to both, forest management under various forms of ownership, as well as detailed guidelines for the content of the forest management plan. We found that the specificity of mountain forests requires the use of different rules and methods. taking into account the exis- ting rich scientific achievements, it is tempting to attempt to develop forest management instructions specifically for mountain forests, whether in the form of a separate chapter or a separate publication. the basic problem with forest management under other forms of ownership (urban, experimental, private forests) is the lack of a detailed legal basis accounting for their specific nature. therefore, appropriate steps should be taken towards intro- ducing appropriate new or supplementary provisions into the forest legislation, which would allow for the development of modern standards. For the state Forests, forest management instructions should be prepared by a team of experts appointed by the Minister of the Environment who will approve the finished document for official use. the forest management plan should include an economic annex focused on the forecast of the expected financial result, inclu- ding costs associated with a deviation from the optimal due to social or protective reasons.
Źródło:
Leśne Prace Badawcze; 2020, 81, 3; 139-146
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura drzewostanów Tatrzańskiego Parku Narodowego – wyniki inwentaryzacji z lat 2016-2017
The structure of forest stands in theTatra National Park: The results of 2016-2017 inventory
Autorzy:
Bodziarczyk, J.
Szwagrzyk, J.
Zwijacz-Kozica, T.
Zieba, A.
Szewczk, J.
Gazda, A.
Powiązania:
https://bibliotekanauki.pl/articles/45954.pdf
Data publikacji:
2019
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
parki narodowe
Tatrzanski Park Narodowy
lasy gorskie
struktura drzewostanu
inwentaryzacja drzewostanow
lata 2016-2017
stale powierzchnie badawcze
miazszosc drzew
zageszczenie drzew
drzewa zywe
drzewa martwe
Źródło:
Leśne Prace Badawcze; 2019, 80, 1
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany zachodzące w lasach Beskidu Małego
Changes occurring in the forests of the Beskid Maly Mts.
Autorzy:
Dmyterko, E.
Bruchwald, A.
Powiązania:
https://bibliotekanauki.pl/articles/979504.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
gory
Beskid Maly
lasy gorskie
drzewostany swierkowe
rozpad drzewostanow
struktura drzewostanu
struktura gatunkowa
struktura wiekowa
pozyskiwanie drewna
zlomy
wywroty
zagrozenia drzewostanow
changes in species composition
decrease in the proportion of spruce
threat to forests
Opis:
Like in the Beskid Śląski and Żywiecki Mts., the dieback of Norway spruce stands takes place also in the Beskid Mały range. This process is clearly more intensive and occurs over a longer period of time. The conversion of these forests during the study period (2004−2016) resulted in a significant increase in the proportion of beech and fir as well as other, mostly deciduous tree species (tab. 1). The dieback of spruce forests is likely to continue, as the share of spruce in some forest complexes is still high. The age class structure of forests during the study period was found to have a negative effect on the stability and uniformity of forest growth – the young stands fraction was too low and decreased (tab. 3). The high average age of stands, which increased from 67 in 2007 to 71 years in 2016 was also unfavourable. The volume of harvested timber was rather high and approximated to the volume of allowable cut determined by the stand growth model (so−called model volume) (figs. 1, 2). In the Andrychów Forest District the harvested volume was significantly lower than the model volume, while in Jeleśnia and Bielsko districts it was significantly higher, which results from higher proportion of spruce in these regions. In the harvested timber structure, the share of wind−broken and wind fallen trees was about 10%, which is not high for the mountain area (fig. 3). The exception was in year 2005, when timber removals after the hurricane of November 2004 were estimated at more than 30%. In 2006−2008, the volume of deadwood was high and consisted mainly of spruce (fig. 4). Then the dieback of spruce forests decreased and was observed predominantly in the western and southern parts of the forest complex. The years 2013−2016 saw a high share of live trees in the harvested timber volume (over 80% of the model volume) (fig. 5). In some parts of the Beskid Mały forests, the harvest of live trees exceeded 300% of the model volume. Such high harvest is justified by the need of urgent silvicultural tasks to be carried out, especially stand conversion. The threat to the Beskid Mały forests from wind is high and remained at the same level throughout the study period – the threat measure Ms was ca. 33 (fig. 6). It is essential to lower the level of threat to these forests by, inter alia, increasing the area of young stands.
Źródło:
Sylwan; 2019, 163, 03; 237-247
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmienność cech szyszek i nasion świerka pospolitego (Picea abies (L.) Karst) w zależności od ich lokalizacji w koronie drzewa
Variability of the selected traits of Picea abies (L.) Karst. cones and seeds depending on their location in the crown
Autorzy:
Jastrzębowski, S.
Kantorowicz, W.
Ukalski, K.
Klisz, M.
Powiązania:
https://bibliotekanauki.pl/articles/980287.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
lasy gorskie
swierk pospolity
Picea abies
szyszki swierku
cechy jakosciowe
nasiona
jakosc nasion
lokalizacja w koronie drzewa
norway spruce
seeds quality
crown zone
cone distribution
mountain forests
Opis:
The objective of the study was to determine whether differences exist between the selected characteristics of Norway spruce cones and seeds depending on their location in the crown. The study was performed in two spruce tree stands growing under mountainous conditions (the Beskidy Mountains, southern Poland). In winter 2015, the cones were collected from 60 standing trees located in the two selected seed stands – Ujsoły and Rycerka. From each tree, the cones were collected from three crown zones: top, central and bottom differing in terms of light conditions. Two characteristics of the cones and six characteristics of the seeds were analysed. To determine quantitative and qualitative traits of seeds standard methods for seed testing were applied. Significant differences between the populations were determined for cone weight and fraction of full seeds, weight of 1000 seeds and germination capacity. The crown zones differed significantly in terms of fraction of cones in the parts of the crown and mass of one cone as well as weight of 1000 seeds, germination energy and germination capacity. Moreover, a significant intra−population variation was observed for a majority of the analysed characteristics (fraction of full seeds, weight of one cone, weight of 1000 seeds, germination energy, and germination capacity). However, no statistically significant interaction between population and crown zone was observed. A significantly lower contribution of cones in the bottom zone of the crown may affect the economic viability of the commercial harvest. On the other hand some of the important seeds traits (e.g. weight of 1000 seeds, germination energy and germination capacity) were significantly better in the bottom and central part of the crown than in the top zone. There are no justified circumstances (both qualitative and quantitative) to perform the cone harvest only from the top zone of the crown.
Źródło:
Sylwan; 2019, 163, 01; 3-12
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przestrzenna autokorelacja cech biometrycznych drzew w górskich drzewostanach świerkowych
Spatial autocorrelation of the biometric features of trees in mountain Norway spruce stands
Autorzy:
Bolibok, L.
Wojtan, R.
Tomusiak, R.
Powiązania:
https://bibliotekanauki.pl/articles/986074.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
lasy gorskie
drzewostany swierkowe
struktura drzewostanu
drzewa lesne
swierk
Picea
cechy biometryczne
autokorelacja przestrzenna
korelacja cech
funkcja korelacji par
spatial autocorrelation
kmm(r) mark correlation function
g(r) pair correlation function
Opis:
The formation of the stand structure interacts with the processes of growth and competition. Previous observations mainly focused on the analysis of the type of tree distribution resulting from these processes. Development of spatial diversity of tree parameters is less known issue. The research was carried out in mountain Norway spruce stands with a large variety of taxation parameters located in the Beskid Żywiecki Mts. (southern Poland). The analysis of spatial auto− correlation of biometric features was carried out with the use of the mark correlation function, and the type of tree distribution was examined using the pair correlation function. In younger, less tended stands of high tree density, a stronger spatial autocorrelation of the tree biometric features was found. The strongest autocorrelation was observed for volume, weaker for the breast height diameter, while the weakest one was reported for height. The analysis indicated that density dependent competition affects the autocorrelation of biometric features more strongly than the type of tree distribution. The range of the tree perception zone determined on the basis of the autocorrelation analysis of features is greater or equal to the width of the inhibition zone determined on the basis of the point pattern type analysis.
Źródło:
Sylwan; 2018, 162, 08; 638-647
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:
Gatunki górskie we florze naczyniowej lasów łęgowych Wyżyny Małopolskiej
The mountain species in the vascular flora of floodplain forests of the Malopolska Upland
Autorzy:
Koba, J.
Powiązania:
https://bibliotekanauki.pl/articles/881332.pdf
Data publikacji:
2017
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:
Wyzyna Malopolska
lasy legowe
flora
rosliny naczyniowe
gatunki gorskie
wystepowanie
Źródło:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2017, 19, 2[51]
1509-1414
Pojawia się w:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Skład gatunkowy, wzniesienie nad poziomem morza i kategoria ochrony jako czynniki wpływające na intensywność zgryzania odnowień w Tatrzańskim Parku Narodowym
Species composition, elevation, and former management type affect browsing pressure on forest regeneration in the Tatra National Park
Autorzy:
Bodziarczyk, J.
Zwijacz-Kozica, T.
Gazda, A.
Szewczyk, J.
Fraczek, M.
Zieba, A.
Szwagrzyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/45542.pdf
Data publikacji:
2017
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
lowiectwo
lasy gorskie
odnowienia lasu
naloty
podrost
gatunki roslin
Sorbus aucuparia
Salix caprea
Abies alba
Acer pseudoplatanus
wysokosc nad poziomem morza
ssaki kopytne
szkody lowieckie
zgryzanie
obszary chronione
Tatrzanski Park Narodowy
stale powierzchnie obserwacyjne
Opis:
Effects of ungulate pressure on the development of young generation of trees is one of the most important issues in ecology and forestry. Ungulate pressure influence on the development of natural regeneration has been also reported from several national parks. Our study on the effects of ungulate browsing on the young generation of trees was conducted on more than 500 sample plots controlled during one growing season. The overall browsing pressure ranged from 7.6% in seedlings to 20.3% in low saplings. The pressure of ungulates on the regeneration of Picea abies, the dominant species in the Tatra National Park, was by and large below 1%. Broadleaved species were browsed more frequently. The relationship between the plot altitudes and browsing intensity was statistically significant for seedlings and low saplings; at the higher altitudes, the browsing pressure was greater. There was also observed a statistically significant relationship between the type of former management and the browsing degree in seedlings; in the areas subjected to “landscape protection”, the intensity of browsing was higher when compared to strictly protected areas. Pressure exerted by ungulates on tree regeneration was very unevenly distributed, i.e. some plots were heavily browsed and many others - not browsed at all. The most affected tree species were Salix caprea and Sorbus aucuparia, although the percentage of browsed individuals rarely exceeded 50%. Other species favored by ungulates was Acer pseudoplatanus; despite the high browsing pressure, this species was present among seedlings and tall saplings, suggesting that it would be able to recruit to the tree layer. Abies alba was browsed less frequently than the deciduous trees; however, among the tall saplings it was the third most browsed species.
Źródło:
Leśne Prace Badawcze; 2017, 78, 3
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zależność wybranych cech drzewostanów od położenia nad poziomem morza na przykładzie Parku Narodowego Gór Stołowych
Dependence of selected stand characteristics on the elevation on the example of the Stolowe Mountains National Park
Autorzy:
Miścicki, S.
Szneidrowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/989003.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
lasy gorskie
Park Narodowy Gor Stolowych
dynamika drzewostanu
miazszosc drzew
miazszosc drewna
zasobnosc drzewostanu
zageszczenie drzew
przyrost miazszosci
czynniki siedliska
wysokosc nad poziomem morza
current volume increment
elevation zone
forest renewal
net changes in standing volume
tree density
Opis:
The elevation is used to illustrate the differences in the structure and growth of mountain forests. The aim of the study was to determine (1) whether the characteristics used to describe the condition and structure of forest stands under protection status (volume of merchantable timber, tree density, total height of trees in the regeneration layer, volume of dead stems, current annual volume increment, volume of dead trees, periodic changes in standing volume) change at the same rate along with the elevation, and (2) whether in mountains without upper montane zone, the values of the selected characteristics of stands located in the highest elevation zone decrease at a low rate with elevation and are comparable to the stands at the same elevation in higher mountains ranges. The study was located at an elevation of 400−909 m a.s.l. in the Stołowe Mountains National Park (PNGS; SW Poland). We used data from the measurements performed in 2009 and 2014 on 358 permanent sample plots. Plots were assigned to one of five elevation zones of 100 m a.s.l. We assumed that the characteristic value decreased with the increase in the elevation, and that such change was the same for all stand characteristics. This hypothesis was verified using the ANOVA for the repeated samples. The calculations were based on standardized values of the characteristics measured on individual sample plots. The higher above sea level the plot was located, the greater share of spruce in the stand (fig. 1). The standing volume (fig. 2), trees density (fig. 3) and current annual volume increment (fig. 6) decreased with elevation, while the volume of dead stems (fig. 4) increased. The net changes in standing volume (fig. 8) were the smallest in the stands located at the lowest and at the highest zone (400−499 and 800−909 m a.s.l.). No significant relationship was found between the total height of trees in the regeneration layer (fig. 5) or the volume of dead trees in the period 2009−2014 (fig. 7) and the elevation. Individual characteristics differed in the rate of changes of their values with elevation (fig. 9). The structure of stands growing at the highest elevation was the most variable. These stands were rather a substitute for the upper montane zone forests. The rate of the observed decrease of the volume of merchantable timber, tree density and current volume increment in the stands of PNGS was higher than in other forests in the Polish mountains.
Źródło:
Sylwan; 2017, 161, 02; 131-141
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detekcja posuszu kornikowego z wykorzystaniem zobrazowań BlackBridge na przykładzie drzewostanów Sudetów i Beskidów
Detection of bark beetle infected trees with BlackBridge image on the example of the Sudety and the Beskidy mountains
Autorzy:
Kycko, M.
Stereńczak, K.
Bałazy, R.
Powiązania:
https://bibliotekanauki.pl/articles/989357.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Beskidy Zachodnie
Sudety
lasy gorskie
drzewostany swierkowe
drzewa martwe
posusz
teledetekcja
zdjecia satelitarne
zobrazowania BlackBridge
blackbridge
condition of forests
satellite image classification
mountain areas
Opis:
BlackBridge imagery is one of the new means of information used in forest condition analysis. Rapid Eye satellite data with a 5 m spatial resolution register spectral information from 440 to 850 nm through 5 spectral bands. This range of electromagnetic spectrum provides information on plant chlorophyll content as well as cell structure. Such data allows to monitor vegetation condition. This paper focuses on a research conducted in the Sudety and Western Beskidy mountains (southern Poland). The aim of the research was to verify whether high resolution satellite imagery is applicable in detection of the damages caused by Ips typographus and acid rain in Norway spruce dominated stands through supervised classification. BlackBridge Rapid Eye satellite images from 2012 and 2013 were analysed. Various modifications of classification methods were tested, including change in combination of spectral bands. Each method resulted in different classification accuracy. Best results were observed in case of the Maximum Likelihood classification method applied on all spectral bands. The analysis showed that the time of the image registration has a significant impact on classification results. The average classification accuracy for 2012 images was 0.53, whereas for 2013 – 0.69. Moreover, information gathered from 5 m pixels is too general to classify individual dead trees in a precise manner. Tested methods are applicable only in detection of clusters of dead trees.
Źródło:
Sylwan; 2016, 160, 09; 707-719
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena funkcjonowania modeli ryzyka uszkodzenia drzewostanów przez wiatr w górach na przykładzie Tatrzańskiego Parku Narodowego
Assessment of the risk models of the wind damage to the stands in the mountains - the Tatra National Park case study
Autorzy:
Zięba, S.
Doleżuchowicz, M.
Banaś, J.
Bujoczek, L.
Powiązania:
https://bibliotekanauki.pl/articles/989579.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
lasy gorskie
wiatry
huragany
szkody w lesie
szkody od wiatru
uszkodzenia drzewostanow
modele ryzyka uszkodzenia
Tatrzanski Park Narodowy
norway spruce
damaged from the wind
mountain forests
forestry planning
regional planning
Opis:
The paper assesses the performance of the risk models of the wind damage to the mountain forest stands located in the Tatra National Park (southern Poland). The models assume that the forest susceptibility to the damage from the wind depends on the characteristics of stands, their location and frequency of the occurrence of damage in the past. According to the methodology we built 5 variants of models, which take into account the following attributes: various stand features, forest type, regional factor of the damage to the the trees, thickness scrap, subversive and deadwood from the stand in the last 10 years, characteristics of the terrain: exhibition, slope inclination and altitude above sea level. The model output is a classification of the stand susceptibility to the wind damage expressed by a number between 0 and 3 (0.5 interval). The suitability of each variant was tested by comparing the in−class rate as well as the area and growing stock of undamaged and damaged stands. In this study we rated 2908 stands with a total area of 15,386.05 ha. Taking into account the risk class, it is possible to develop the appropriate procedures in order to limit the damage. The analysis conducted for the forests of the Tatra National Park showed high compliance of the developed risk models with the damages arising by the wind. This is confirmed by a particularly high proportion of damaged forest stands included in the class of high risk. Their fraction ranged from 43.8% (WR1) to 92.4% (WR5). Considering the position and stands characteristics the greatest damage arose at an altitude of 950 to 1000 m (70.2%) and the exposures NW, N and NE (60.2%).
Źródło:
Sylwan; 2016, 160, 05; 378-387
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena kondycji drzewostanów Tatrzańskiego Parku Narodowego za pomocą metody drzewa decyzyjnego oraz wielospektralnych obrazów satelitarnych Landsat 5 TM
Assessment of the condition of forests in the Tatra National Park using decision tree method and multispectral Landsat TM satellite images
Autorzy:
Ochtyra, A.
Zagajewski, B.
Kozłowska, A.
Marcinkowska-Ochtyra, A.
Jarocińska, A.
Powiązania:
https://bibliotekanauki.pl/articles/972978.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewostany
kondycja drzew
metody oceny
drzewa decyzyjne
teledetekcja satelitarna
obrazy satelitarne
satelita Landsat TM
leśnictwo
lasy górskie
Tatrzański Park Narodowy
forest
assessment of condition
vegetation indices
remote sensing
the Tatras
Landsat TM
Opis:
The paper presents a method of Landsat 5 Thematic Mapper satellite image processing to assess the condition of forests in the Tatra National Park (southern Poland). Selected images were acquired on 1987/09/01, 2005/09/02 and 2011/09/03 from the same sensor with maximum time interval for the first and last scene and from similar phenological period. Firstly, the data were radiometrically corrected using the ATCOR 2/3 software and Digital Terrain Model from the ASTER mission. Quality of the correction was assessed calculating RMSE for reflectance values from images and resampled spectral characteristics collected in terrain. RMSE was in range 3−10%. Next, basing on Landsat images, Normalized Difference Infrared Index (NDII) and a Maximum Likelihood supervised classificatory, following dominant land cover types were identified: forests (including dwarf pine), grasslands, rocks, lakes, shadows (additionally clouds were dis−tinguished on data from 1987/09/01). It allowed to select forest areas with producer accuracy not worse than 97.69% and user accuracy not worse than 98.31%. On corrected Landsat images Normalized Difference Vegetation Index (NDVI, an overall vegetation state) and Moisture Stress Index (MSI, canopy water content) were calculated. Vegetation indices discriminated forest state using the decision tree method. The worst overall condition was observed for the 1987 (about 21% of forest stands were in the worst condition and 87% were in medium condition), while the best one in 2005 (75.51% forest stands were in good condition and 10.66% were in the best condition). In case of 2011, the overall condition was quite good, but there were large areas with poor condition caused by bark beetle outbreaks. Proposed method allows for a fast and objective assessment of forest condition. It is possible to detect damaged areas or stands in poor condition. It can be complement for traditional methods of monitoring and management in forestry and nature protection.
Źródło:
Sylwan; 2016, 160, 03; 256-264
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Podstawy planowania składu gatunkowego w lasach górskich na przykładzie Beskidu Niskiego
Basis of the species composition planning model for mountain forests on the example of Beskid Niski Mts.
Autorzy:
Bruchwald, A.
Dmyterko, E.
Mionskowski, M.
Niemczyk, M.
Łukaszewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/972988.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
hodowla lasu
planowanie
czynniki siedliska
typy siedliskowe lasu
leśnictwo
tereny górskie
lasy górskie
skład gatunkowy
wysokość nad poziomem morza
rzeźba terenu
species composition
habitats
landforms
mountain forests
Opis:
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.
Źródło:
Sylwan; 2016, 160, 03; 219-229
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmienność wybranych cech makrostruktury i gęstości drewna świerkowego (Picea abies (L.) Karst.) z regla dolnego i górnego
Variability of selected macrostructural features and density of Picea abies (L.) Karst. wood from lower and upper subalpine forest zones
Autorzy:
Michalec, K.
Wąsik, R.
Barszcz, A.
Powiązania:
https://bibliotekanauki.pl/articles/989498.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
wysokosc nad poziomem morza
lesnictwo
lasy gorskie
regiel gorny
regiel dolny
drzewa lesne
swierk pospolity
Picea abies
drewno swierkowe
drewno pozne
gestosc drewna
sloje przyrostu rocznego
szerokosc
czynniki siedliska
tree−ring width
latewood share
height above mean sea level
Opis:
The paper compares the properties of Norway spruce (Picea abies (L.) Karst.) wood from stands growing in the lower and upper subalpine forest zone in terms of the tree−ring width, the share of latewood and the wood density. The investigation concerned material originating from plots established within the boundaries of the south−western incidence of spruce in Poland. Plots were located in the Sudety Mts. and in the Carpathians (tab. 1). On each plot fifteen Norway spruces were chosen and increment cores were sampled using the Pressler borer. The surface of the cores was smoothed and the tree−ring width was measured. The latewood zones were determined and the share of latewood was calculated. Then, the cores were divided into 2 cm sections, for which the relative wood density was determined. Tree−rings were wider in trees growing in the lower when compared with those from the upper subalpine forest zone (tab. 2). Weak negative correlation was revealed between the elevation and the tree−ring width (r=–0.308). The latewood share was slightly higher in trees from the upper than those from the lower subalpine forest zone (tab. 2). However, no statistically significant correlation between the latewood share and elevation was recorded. The wood density was slightly lower in trees from the lower than those from the upper subalpine forest zone (tab. 2), but the difference was not statistically significant. The correlation between the wood density and the elevation turned out to be insignificant.
Źródło:
Sylwan; 2016, 160, 10; 855-860
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Próba zastosowania grzyba Beauveria bassiana (Bals.) Vuill. w ochronie lasu przed kornikiem drukarzem Ips typographus (L.) w warunkach terenowych
An attempt to use the fungus Beauveria bassiana (Bals.) Vuill. in forest protection against the bark beetle Ips typographus (L.) in the field
Autorzy:
Grodzki, W.
Kosibowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/1312103.pdf
Data publikacji:
2015
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
ochrona lasu
lasy gorskie
drzewostany swierkowe
szkodniki roslin
kornik drukarz
Ips typographus
zwalczanie szkodnikow
grzyby entomopatogenne
Beauveria bassiana
biopreparaty
badania terenowe
bark beetles
Picea abies
biological control
montane forests
field trials
Opis:
In 2011–2013, trials on the use of the entomopathogenic fungus Beauveria bassiana against bark beetle (Ips typographus) populations were carried out under open field conditions in Norway spruce stands suffering from an outbreak in the Beskid Żywiecki Mts. in Poland. Modified pheromone traps were deployed to capture and thereafter release fungus-infected bark beetles to the forest environment. Infested spruce trees felled next to the traps remained unaffected by the transmission of the fungus to insect populations. Direct spraying or dusting of lying trap logs and suspended caged rearing bolts did not have any effect on spruce infestation by I. typographus, its reproduction success and development or natural enemies inside the bark. A very small effect on mortality rates of target as well as non-target insects overwintering in the dusted litter was observed. Treated stands, unlike control stands, were indirectly affected by the treatment, evidenced by the reduction of tree mortality due to bark beetle infestation. At present, no recommendations concerning the potential use of the fungus in forest protection can be given. However such an environmentally friendly approach represents a promising future prospect.
Źródło:
Leśne Prace Badawcze; 2015, 76, 1; 5-17
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 127

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