Temat: forest condition - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Development of forest cover mask to monitor the health condition of forests in Poland using long-term satellite observations
Autorzy:: Bartold, Maciej
Wydawca:: Instytut Badawczy Leśnictwa (Forest Research Institute), Sekocin Stary, Poland
Opis:: The work presented here aims at developing cover mask for monitoring forest health in Poland using remote sensing data. The main objective was to assess the impact of using the mask on forest condition monitoring combined with vegetation indices obtained from long-term satellite data. In this study, a new mask developed from the CORINE Land Cover 2012 (CLC2012) database is presented and its one-kilometer pixel size matched to low-resolution data derived from SPOT VEGETATION satellite registrations. For vegetation mapping, only pixels with a cover ≥ 50% of broad-leaved and mixed forests defined by CLC2012 were taken into account. The masked pixels were used to evaluate spatial variability in eight Natural-Forest Regions (NFRs). Thelargest coverages by masked forests were obtained in Sudetian (65.7%), Carpathian (65.9%) and Baltic (51.3%) regions. For other forest regions the coverage was observed to be around 30–50%. Time-series of the Normalized Difference Vegetation Index (NDVI) comprising SPOT VEGETATION images from 1998 until 2014 were computed and cross-comparison analyses on ≥ 50% and < 50% forest cover masks brought up frequent differences at a level higher than 0.05 NDVI in seven out of eight NFRs. An exception is the Sudetian region, where the data was highly consistent. Furthermore, the Mann-Whitney U non-parametric test revealed statistically significant differences in two regions: Baltic and Masurian-Podlasie NFR. The comparative analysis of NDVI confirmed that there is a need for additional investigation of the quality of newly developed forest mask combined with vegetation and meteorological data.
Przemysław Szmit
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 2.

Tytuł:: Charakterystyka zmian w stanie lasów Puszczy Noteckiej
The description of changes in the state of the Notecka Primeval Forest
Autorzy:: Miś, R.
Tematy:: Puszcza Notecka
gospodarka lesna
lasy
lesnictwo
urzadzanie lasu
notecka forest
forest management
forest condition
trends of changes; Pokaż więcej
Wydawca:: Polskie Towarzystwo Leśne
Powiązania:: https://bibliotekanauki.pl/articles/1026465.pdf Link otwiera się w nowym oknie
Opis:: The paper provides the results of the subsequent forest management plans conducted for Forest Districts lying on the grounds of the Notecka Primeval Forest. The objective of the studies was to define the trends of changes of indicators used in the assessment of the state of forests and forest management. The obtained results refer to the longer period of time (44 years) and account for important changes in the structure and functioning of the Notecka Primeval Forest.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Soil acidification and nutrient sustainability of forest ecosystems in the northeastern German lowlands - Results of the national forest soil inventory
Autorzy:: Martin, Jan
Russ, Alexander
Riek, Winfried
Wydawca:: Instytut Badawczy Leśnictwa, Komitet Nauk Leśnych PAN
Opis:: Przemysław Szmit
Between the first and second national forest soil inventory in the northeastern German lowlands a significant soil acidification took place with regionally varying intensity. It manifests itself in a reduced base saturation in the whole rooting zone. This applies to the base cations magnesium and calcium. For potassium, however, no significant changes were detected. The acidification dynamic is the strongest in the southern part of Brandenburg. The specific immission situation in this region during the past four decades explains this. Particularly in southern Brandenburg high dust depositions (fly ashes from brown coal-fired power stations) buffered the acid components and enriched the soil with base cations in the 1970s and 1980s. Since the reduction of these atmospheric depositions, the bases were obviously totally incorporated in the biomass or leached out with seepage water. Currently, the majority of the forest sites in Mecklenburg-Vorpommern and Brandenburg are poor in basic nutrient elements (Ca, Mg, K). Especially the element magnesium is assumed to be lacking. This paper presents an assessment of the long-term availability of the nutrients Ca, Mg und K on the basis of calculated nutrient balances for various forest management scenarios (e.g. full-tree harvest). The results show that the sustainable supply is critical especially for intensive forest use on numerous sites.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 4.

Tytuł:: Wstępne wyniki wielkoobszarowej inwentaryzacji stanu lasu – podstawy banku danych o zasobach leśnych i stanie lasów
Preliminary results of a large-scale forest inventory as the basis for establishing a bank of data on forest resources and forest condition
Autorzy:: Zajączkowski, S.
Tematy:: zasoby drzewne
stan zdrowotny lasu
lasy
stale powierzchnie obserwacyjne
zasoby lesne
lesnictwo
inwentaryzacja wielkopowierzchniowa
large−scale forest inventory
bank of data on forest resources and forest condition
measurements and
observations on sample plots
preliminary results; Pokaż więcej
Wydawca:: Polskie Towarzystwo Leśne
Powiązania:: https://bibliotekanauki.pl/articles/1012431.pdf Link otwiera się w nowym oknie
Opis:: The paper presents general assumptions for and preliminary results (after two years of measurements and observations) of the large−scale forest inventory performed in the country for all ownership categories since 2005. The results of the large−scale forest inventory in Poland should be the basis for a bank of data on forest resources and forest condition that will be an important module in a planning and forecasting system in Polish forestry.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Health condition and colonization of stem insects in Scots pine after ground fire in Central Polissya
Autorzy:: Andreieva, Olena
Zhytovа, Olena
Martynchuk, Ivan
Wydawca:: The Committee on Forestry Sciences and Wood Technology of the Polish Academy of Sciences and the Forest Research Institute in Sekocin Stary
Cytata wydawnicza:: Andreieva, O., Zhytovа, O., & Martynchuk, I. (2018). Health Condition and Colonization of Stem Insects in Scots Pine after Ground Fire in Central Polissya, Folia Forestalia Polonica, 60(3), 143-153.
Opis:: Over the past decades, the increase in occurrence of fires has caused degradation of the forest ecosystem and caused impacts to the environment. The aim of this study was to reveal the peculiarities of Scots pine health condition dynamics in the first 2 years after August fire and to estimate the rate of tree colonisation by stem insects in Central Polissya. Scots pine health condition for the first 2 years after summer ground fire in August 2016 and the rate of tree colonisation by stem insects was studied in Zhytomyr region, Western Ukraine. Stem scorch height was measured for every fire-damaged tree, and the index of fire damage severity was calculated. Vital trees health condition worsened more intensively in the sample plot with the lowest relative stocking density and the highest stem scorch by fire. Generally, the forest health condition has worsened in post-fire period in fire damaged stands. However, 23.1% of trees recovered health condition from category ‘drying-up’ to ‘severely weakened’. In fire-damaged stands, the number of species of stem insects has increased from 8 to 11 during the first 2 years of fire damage. Bark beetles were represented by Tomicus piniperda (Linnaeus, 1758), Tomicus minor (Hartig, 1834), Ips acuminatus (Gyllenhal, 1827) and Ips sexdentatus (Boerner, 1767). Jewel beetles included Anthaxia quadripunctata (Linnaeus, 1758), Phaenops cyaneus (Fabricius, 1775), Melanophila acuminata (DeGeer, 1774) and Chalcophora mariana (Linnaeus, 1758). Longhorn beetles included Monochamus galloprovincialis (Olivier, 1795), Pogonocherus fasciculatus (Degeer, 1775) and Acanthocinus aedilis (Linnaeus, 1758). Tree colonisation by stem insects in the year of fire damage was comparable with control stand, because insect swarming completed before this disturbance. Maximal occurrence of stem insects in 2017 in fire-damaged stand increased up to 66.7% (for I. sexdentatus). The percentage of trees colonised by any insect species at fire-damaged and healthy pine stands differed significantly. The occurrence of stem insects depended mainly on the ratio of trees with different health condition. Our results demonstrate data of tree damage from fire and tree health index as a strong predictor of post-fire mortality of Scots pine and bark beetle occurrence.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 6.

Tytuł:: Opracowanie maski obszarów leśnych w celu monitoringu kondycji zdrowotnej lasów w Polsce na podstawie wieloletnich obserwacji satelitarnych
Development of forest cover mask to monitor the health condition of forests in Poland using long-term satellite observations
Autorzy:: Bartold, M.
Tematy:: lesnictwo
Polska
lasy
stan zdrowotny lasu
monitoring
obserwacje satelitarne
program CORINE Land Cover
pokrycie terenu
Znormalizowany Wskaznik Wegetacji
baza CORINE Land Cover 2012
CORINE Land Cover 2012
forest condition
NDVI
satellite images
vegetation mapping; Pokaż więcej
Wydawca:: Instytut Badawczy Leśnictwa
Powiązania:: https://bibliotekanauki.pl/articles/1294000.pdf Link otwiera się w nowym oknie
Opis:: The work presented here aims at developing cover mask for monitoring forest health in Poland using remote sensing data. The main objective was to assess the impact of using the mask on forest condition monitoring combined with vegetation indices obtained from long-term satellite data. In this study, a new mask developed from the CORINE Land Cover 2012 (CLC2012) database is presented and its one-kilometer pixel size matched to low-resolution data derived from SPOT VEGETATION satellite registrations. For vegetation mapping, only pixels with a cover ≥50% of broad-leaved and mixed forests defined by CLC2012 were taken into account. The masked pixels were used to evaluate spatial variability in eight Natural-Forest Regions (NFRs). The largest coverages by masked forests were obtained in Sudetian (65.7%), Carpathian (65.9%) and Baltic (51.3%) regions. For other forest regions the coverage was observed to be around 30–50%. Time-series of the Normalized Difference Vegetation Index (NDVI) comprising SPOT VEGETATION images from 1998 until 2014 were computed and cross-comparison analyses on ≥50% and <50% forest cover masks brought up frequent differences at a level higher than 0.05 NDVI in seven out of eight NFRs. An exception is the Sudetian region, where the data was highly consistent. Furthermore, the Mann-Whitney U non-parametric test revealed statistically significant differences in two regions: Baltic and Masurian-Podlasie NFR. The comparative analysis of NDVI confirmed that there is a need for additional investigation of the quality of newly developed forest mask combined with vegetation and meteorological data.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Assessment of the technical condition of tyres used in agricultural and forestry machinery
Ocena stanu technicznego ogumienia wykorzystywanego w maszynach rolniczych i leśnych
Autorzy:: Gorzelańczyk, P.
Rochowiak, Ł.
Tematy:: technical condition
tyre
agricultural machine
forest machine; Pokaż więcej
Wydawca:: Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Powiązania:: https://bibliotekanauki.pl/articles/2080615.pdf Link otwiera się w nowym oknie
Opis:: The article addresses the issues related to the testing of properties and assessment of the impact of factors forcing the replacement of tires in agricultural and forestry machines. This is a significant problem regarding the conditions of operation and use of agricultural and forestry machinery, which affects the withdrawal of tires from further use. The first part of the article presents the characteristics of tires for agricultural and forestry machines, presenting their structure, advantages and disadvantages, and the most common damage. In the second and at the same time the main part of the article, the tires of agricultural and forestry machines were examined, and the results and analysis of the conducted measurement tests were presented. The work ends with conclusions that appeared during the tests and proposed solutions for users of the tested tires.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The relationship between height and diameter trees of Scots pine ( Pinus sylvestris L.) and the extent of crown defoliation in the Kampinos National Park
Autorzy:: Tyburski, Łukasz
Mohytych, Vasyl
Przybylski, Paweł
Wydawca:: The Committee on Forestry Sciences and Wood Technology of the Polish Academy of Sciences and the Forest Research Institute in Sekocin Stary
Cytata wydawnicza:: Przybylski, P., Tyburski, Ł., & Mohytych, V. (2020). The relationship between height and diameter trees of Scots pine (Pinus sylvestris L.) and the extent of crown defoliation in the Kampinos National Park, Folia Forestalia Polonica, 62(1), 22-30. doi: https://doi.org/10.2478/ffp-2020-0003
Opis:: Forests in Kampinos National Park contain some of the most valuable tree populations in Poland. Particularly interesting are stands of Scots pine (Pinus sylvestris L.) that are more than 130-years-old. Periodic observations of the health of tree crowns in these stands facilitates a wide range of research investigations. This article evaluates statistical relationships between allometric features of trees and the occurrence and severity of crown defoliation. Observations were made of 5 pine populations in 2017 and 2019, in which detailed data were collected for 250 trees. The percentage loss of the assimilation apparatus and level of stand damage were calculated. The results revealed a significant increase in defoliation between 2017 and 2019. The deterioration of crown condition was particularly evident on the most fertile sites. The degree of crown damage was not correlated with tree height or diameter. The greatest increase in defoliation between 2017 and 2019 was observed for the most severely damaged trees growing on fertile sites. This study contributes analyses aimed at correlating the allometric features of a stand with its health. Such information is valuable as it describes the status of the analysed stands, as well as providing information about how trees have responded to environmental conditions. In this study, crown defoliation coincided with a period of drought in Poland, which appears to have affected pine stands. For these reasons, the results are of both scientific and practical value.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 9.

Tytuł:: Występowanie, kondycja i zagrożenia zimoziołu północnego w Puszczy Augustowskiej
The twinflower in the Augustów Forest: occurrence, condition and threats
Autorzy:: Zawadzka, Dorota
Bednarek, Jerzy
Piechowska, Dorota
Mikitiuk, Artur
Bednarek, Joanna B.
Zawadzki, Grzegorz
Wydawca:: Instytut Badawczy Leśnictwa (Forest Research Institute), Sękocin Stary, Poland
Opis:: The twinflower Linnaea borealis L. is a rare, boreal plant species that grows in coniferous forests and is partly protected in Poland. We studied its distribution and the condition in the Augustów Forest (NE Poland) describing 22 twinflower patches in total. The following features were assessed: (1) patch area, (2) distance between individual twinflowers, (3) patch density, (4) intensity of flowering, (5) fruiting, (6) main accompanying plant species, (7) plant community structure, (8) species composition and age of the forest stands, (9) canopy cover of the forest stands, (10) existing and potential threats. In the northern part of the forest where suitable pine sites dominated, twinflowers were distributed irregularly and unevenly. Twinflowers in the Augustów Forest occur in relatively big areas with individual patches covering from 100 m2 to 3000 m2, but most commonly 500–1000 m2. The mean distance to the nearest neighbouring twinflower was 1600 m (range from 250 m to 6035 m). This pattern of distribution and separating distance does allow for sexual reproduction within the studied forest stand and blooming was confirmed in 21 out of 22 patches. In four locations, intensive blooming with >50 flowers shoot/m2 was observed. We did not observe a dependency of the flowering intensity on patch size. Despite the intensive and frequent flowering, as well as the presence of fruits, which were found in 15 patches, the twinflower reproduces mainly vegetatively. Twinflowers grew in 34–166 years-old pine-spruce stands with moderate canopy cover, but there was no relationship between the age of forest stands and the size of a flower patch. Plant species, which commonly occurred with twinflowers were: Vaccinium myrtillus, Calamagrostis arundinacea, Goodyera repens, Rubus saxatilis, Fragaria vesca, Pleurosium schreberi. Twinflower communities are threatened by invasive species in the forest understory in two locations only, while in the other locations no active protection is needed and the plants should rather be protected and monitored through multifunctional forest management. We emphasise the importance of the Augustów Forest for the twinflower in Poland, because about 10% of the Polish population grows in this forest complex.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 10.

Tytuł:: Evaluation of the loss of assimilation apparatus and its causes in Scots pine stands (Pinus sylvestris L.) of the Kampinos National Park
Autorzy:: Tyburski, Łukasz
Przybylski, Paweł
Wydawca:: The Committee on Forestry Sciences and Wood Technology of the Polish Academy of Sciences and the Forest Research Institute in Sekocin Stary
Cytata wydawnicza:: Tyburski, Ł., & Przybylski, P. (2018). Evaluation of the Loss of Assimilation Apparatus and Its Causes in Scots Pine Stands (Pinus Sylvestris L.) of the Kampinos National Park, Folia Forestalia Polonica, 60(3), 173-182.
Opis:: The Kampinos National Park (KNP), in terms of ecology, is an exceptionally valuable place in the Polish lowland region. Until the 20th century, as a result of limited human influence on the natural resources of the Kampinos Forest, it can be presumed that the 100-year-old tree stands were shaped by natural ecological processes. This study contains a detailed assessment of crown conditions, dendrometric measurements and visible disease symptoms in the oldest fragments of the KNP, as well as statistical evaluation of the relationships between these factors. Results were correlated with ecological factors such as precipitation and temperature. For the purpose of the study, five tree stands, each over 130 years old, were selected. In each stand, the level of defoliation was assessed, based on the forest monitoring methodology performed in Poland for the State Environmental Monitoring. Tree height, circumference, and diameter at breast height measurements were performed for all the trees, and any visible disease symptoms were described. Defoliation data were used to classify 93.6% of the trees as the second level of stand damage (the so-called ‘warning’ level) according to the monitoring methodology. Observed disease factors confirm the physiological weakening of the trees. The populations studied exhibited a range of mean height and stem volume, and these were not significantly related to the level of defoliation or visible disease symptoms. Ecological factors, especially the drought in 2015, probably did not have a negative impact on the examined stands. The analysed pine populations demonstrate physiological weakness, but this appears to be related to their age and natural ecological processes.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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