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Wyszukujesz frazę "mixed forest" wg kryterium: Temat


Wyświetlanie 1-15 z 15
Tytuł:
Analiza zmian stanów wód gruntowych po wycięciu drzewostanu w siedlisku lasu mieszanego wilgotnego na przykładzie Leśnictwa Laski
Analysis of Ground-Water Level Changes after Cutting Down a Forest Stand in Moist Mixed Broadleaved Forest Habitat on the Example of Laski Forestry
Autorzy:
Korytowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1819020.pdf
Data publikacji:
2013
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
wody gruntowe
drzewostan
las mieszany
groundwater
stand
mixed forest
Opis:
The paper presents the results of researches carried on averages about precipitation sums, 2003/2004 (before cutting) and 2006/2007 (after cutting) hydrological years in catchment of pond No 5 located in Laski forestry. Discussing forestry is situated at Siemianice Experimental Forest Farm of Poznań University of Life Sciences located about 15 km south-east from Kępno. The forests of this forestry are within range of Nizina Południowo-Wielkopolska, on Wysoczyzna Wieruszowska, which is differential morainic plain, cut with the river Prosna headwaters. Area of the pond’s catchement is about 20 ha and it’s an afforested catchment, with predominance of fresh habitats, in smallest step in area adjacent to pond No 5 occurrence moist broadleaved forest and moist mixed broadleaved forest. Predominant species of tree stand in analyzing catchment there is pine about 100 years. In the soil cover the largest area is dear brown soil, and the most common type of soil is loamy sand. From february to october 2006 carried on analyzed catchment cutting forest stand, which included habitats moist broadleaved forest, moist mixed broadleaved forest and partially fresh broadleaved forest. To analysing choose wells No 1.1 and 1.2 which were situated at cutting area. The researches carried out confirmed, that ground-water levels shows some cycle and depend of meteorological conditions. Maximal levels occurred at the end of winter researches half-year. Whereas minimal ground-water levels, causes higher air temperature and influence with them transpiration forest stands, were in analyzing habitat at the end of summer half-year. The researches indicated also, that without meteorological conditions, large influence at form ground-water level (increase) in afforested catchments, particularly in moist habitats, have carried cuttings. Carried out researches indicated that execute cutting at area analysis habitat moist mixed broadleaved forest causes increase ground-water levels. Ground-water level at cutting area in 2006/2007 hydrological year was closer to land surface, average about 61 cm.
Źródło:
Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 2; 1274-1286
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of the coniferous forest - grassland edge on ground vegetation in the mixed European forest zone, Lithuania
Autorzy:
Marozas, V.
Powiązania:
https://bibliotekanauki.pl/articles/41375.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
coniferous forest
grassland
forest edge
ground vegetation
mixed forest
species richness
forest fragmentation
Europe
Lithuania
Opis:
The objective of this study was to estimate the edge effect on the species richness in agriculturally maintained forest-grassland boundaries of coniferous forest and to determine how species respond to a forest edge. We hypothesised that species number, cover of herbs and mosses is higher in the edge, and species penetrates from nearby grasslands into forest interior. The study was conducted in the Southwestern Lithuania. The edge effect on overall herbaceous species composition of coniferous forests was evaluated by Canonical Correspondence Analysis. The species richness of herbs and mosses in the coniferous forest was highest in the forest edge and declined towards interior. The highest decrease in the number of species occurred within 0 to 5 m to the edge. The highest cover of herbs and mosses was in the forest edge and decreased towards the forest interior. CCA biplot showed a good correlation of overall species composition and the distance to the forest edge. Distribution of species along edge to interior gradient depended on the species response to different ecological factors. Ellenberg value of light was higher in the edge. Ellenberg value of nitrogen was higher in the forest interior.
Źródło:
Dendrobiology; 2014, 71
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fruiting phenology and avian frugivory of Streblus asper Lour. in a mixed dry deciduous forest, Western Ghats, India
Autorzy:
Aruna, R.
Balasubramanian, P
Powiązania:
https://bibliotekanauki.pl/articles/11620.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
fruiting
phenology
bird
frugivore
Streblus asper
mixed forest
dry deciduous forest
Western Ghats
India
Opis:
This paper describes the fruiting phenology and avian frugivory of Streblus asper (Moraceae) in a mixed dry deciduous forest, Anaikatty hills, Western Ghats. Fruiting occurred during April-June. Nine species of birds were found to feed on the ripe fruits of this species. Bulbuls (3 species) belonging to Pycnonotidae, followed by two species of Myna (Sturnidae) made majority of the feeding visits and appear to be the major seed dispersers of this species.
Źródło:
International Letters of Natural Sciences; 2014, 17
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Content of Heavy Metals in the Soil and Litterfall an a Beech-Pine-Spruce Stand in Northern Poland
Zawartość metali ciężkich w glebie i opadzie roślinnym w drzewostanie bukowo-sosnowo-świerkowym na obszarze Polski północnej
Autorzy:
Jonczak, J.
Parzych, A.
Powiązania:
https://bibliotekanauki.pl/articles/205313.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mixed forest
litterfall chemistry
environment pollution
lasy mieszane
metale ciężkie
opad roślinny
zanieczyszczenie środowiska
Opis:
The concentrations of Cu, Mn, Ni and Zn in the soil and litterfall, as well as influx of the elements to the soils with litterfall were studied in a mixed beech-pine-spruce stand in northern Poland during the years 2007–2009. Annual influx of litterfall to the soil amounted from 3.234 to 4.871 t/ha. Beech, pine and spruce litterfall contributed in total litterfall in 50.8−70.1%, 11.4−11.9% and 1.6−24.0% respectively. The following average annual concentrations of heavy metals in total litterfall during the 3-year study period were noticed: 2469.3–3469.2 mg Mn/kg, 153.6–160.8 mg/kg Zn, 8.0–14.3 mg Ni/kg and 5.0–6.8 mg Cu/kg. In general, the concentrations of Mn and Cu were higher in beech litterfall in comparison to pine and spruce. The contents of Zn and Ni in beech, pine and spruce litterfall were comparable. Annual influx of metals to the soil with litterfall was: 10341.6–14422.4 g/ha Mn, 460.3–748.1 g/ha Zn, 37.4–66.6 g/ha Ni and 20.2–31.8 g/ha Cu. The fluxes were higher for Mn, Zn and Ni, and comparable for Cu in relation to those observed in other beech, pine, spruce and mixed stands in northern Europe.
W latach 2007–2009, w drzewostanie bukowo-sosnowo-świerkowym zlokalizowanym na obszarze Polski Północnej, prowadzono badania zawartości Cu, Mn, Ni i Zn w glebie i opadzie roślinnym oraz dopływu tych składników do gleby z opadem. Roczna produkcja opadu roślinnego w okresie badań wynosiła od 3.234 do 4.871 t/ha. W całkowitej jego masie udział opadu buka wynosił 50.8−70.1%, sosny 11.4−11.9%, a świerka 1.6−24.0%. Średnie ważone roczne stężenia badanych metali w opadzie roślinnym mieściły się w przedziale: 2469.3–3469.2 mg Mn/kg, 153.6–160.8 mg Zn/kg, 8.0–14.3 mg Ni/kg i 5.0–6.8 mg Cu/kg. Na ogół wyższe stężenia Mn i Cu obserwowano w opadzie buka w porównaniu z opadem sosny i świerka, a zawartość Zn i Ni była porównywalna. Roczny dopływ metali do gleby z opadem roślinnym wynosił: 10341.6–14422.4 g Mn/ha, 460.3–748.1 g Zn/ha, 37.4–66.6 g Ni/ha i 20.2–31.8 g Cu/ha. Na tle danych uzyskanych przez innych autorów w drzewostanach bukowych, sosnowych, świerkowych i mieszanych występujących w Europie Północnej, odnotowany w badanym drzewostanie dopływ Mn, Zn i Ni był większy, a Cu porównywalny.
Źródło:
Archives of Environmental Protection; 2014, 40, 4; 67-77
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transformation of Forest Vegetation after 40 Years of Protection in the Tomczyce Nature Reserve (Central Poland)
Autorzy:
Kiedrzyński, Marcin
Zielińska, Katarzyna
Grzelak, Paulina
Powiązania:
https://bibliotekanauki.pl/articles/764874.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
forest regeneration
mixed pine-oak forest
nature protection
Central Poland
Opis:
The Tomczyce nature reserve is characterized by a degenerated forest vegetation. We assume that the regeneration process was possible to launch after the establishment of the nature reserve in 1968. The vegetation of the Tomczyce forest complex was characterized for the first time by Jakubowska-Gabara (1976) whose studies were taken as a basis of our research. The phytocenoses after 40. years of protection have a greater participation of species with higher trophic and moisture requirements. The regeneration process in communities with pine trees is caused by an expansion of broad-leaved trees and shrubs. Transformation of forest vegetation causes a decrease in cover of thermophilous and heliophilous species. On the other hand, species of oak-hornbeam forests as well as anthropophytes are in expansion. Planning of the protection activities in the nature reserve needs to include these dynamic tendencies of the vegetation.
Źródło:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica; 2011, 7; 207-227
1730-2366
2083-8484
Pojawia się w:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acer-Fraxinus dominated woods of the Italian Peninsula: a floristic and phytogeographical analysis
Autorzy:
Angiolini, C.
Foggi, B.
Viciani, D.
Powiązania:
https://bibliotekanauki.pl/articles/58606.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Acer-Fraxinus community
forest community
Italian Peninsula
flora analysis
phytogeographic analysis
biogeography
Italy
mixed broad-leaves wood
numerical method
syntaxonomy
mixed forest
Tilio platyphylli-Acerion pseudoplatani alliance
forest management
Europe
Opis:
Forest communities dominated by noble broad-leaved trees (maple, lime and ash) in Europe are of elevated scientific and conservation interest for the European Union. In this paper, we first present a synthesis of the maple and ash forests in peninsular Italy. By classifying these forests, we distinguish seven main groups for the territory, which only broadly match the syntaxa proposed in the literature. The variability of the Apennine data is then analysed floristically and phytogeographically (using chorological components) in a central-southern European context, using numerical classification, INSPAN, and direct ordination of several synoptic tables. These analyses allow us to identify six different groups of European Acer-Fraxinus communities. Canonical Variates Analysis (CVA) of the geographical components confirms the existence of distinct phytogeographical groups. In particular, we highlight the clear distinction between central European (including the Alps) and southern European coenoses. Among the latter there was a clear floristic and chorological distinction between Balkan and Apennine groups. These results reflect the biogeographical subdivisions of Europe, but do not support the syntaxonomical schemes proposed by other authors, which are based only on floristic-ecological information or (recently) use a smaller data set of Italian relevés. This study also shows that syntaxonomical schemes above the association level should pay more attention to phytogeographical aspects rather than focus on floristic-ecological information alone, in order to propose models that are of value on a geographical scale.
Źródło:
Acta Societatis Botanicorum Poloniae; 2012, 81, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Precipitation and duff fall as natural sources of nitrogen and phosphorus for forest soils in the Slowinski National Park
Opad atmosferyczny i opad roślinny jako naturalne źródło azotu i fosforu dla gleb leśnych w Słowińskim Parku Narodowym
Autorzy:
Parzych, A.
Trojanowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/85037.pdf
Data publikacji:
2006
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
precipitation
natural source
nitrogen
phosphorus
forest soil
Slowinski National Park
fall
plant
mixed forest
wood
leaf
needle
mineralization
ground cover
tree root
forest ecosystem
Opis:
Every year forest soils are enriched with nitrogen and phosphorus compounds due to the fall of leaves and litter of conifer needles, mineralization of ground cover and decaying tree roots, as well as precipitation. The process has been examined in two forest ecosystems: a mixed forest (plot I) and a young wood (plot II). The overall fall of duff collected in the young wood of the Słowinski National Park (plot II) has been 3.014 t/ha·year, which constitutes 69.35% of the fall collected in the mixed forest (plot I) on this territory (4.346 t/ha·year). The maximum intensity of duff fall occurred in autumn months and constituted 62.36% and 64.20% of annual fall respectively. Totally, 46.96 kg/ha·year of N and P were supplied to the soil of the plot I and 22.04 kg/ha·year in the case of the plot II. The precipitation enriched the soils of the mixed forest by 33.66 kg/ha·year of nitrogen and 1.19 kg/ha·year of phosphorus, the soils of the young wood – by 23.06 kg/ha·year of nitrogen and 0.92 kg/ha·year of phosphorus.
Każdego roku gleby leśne wzbogacane są związkami azotu i fosforu pochodzącymi z opadających liści i igliwia, mineralizacji runa leśnego, gnijących korzeni drzew i krzaków oraz opadów atmosferycznych. Procesy te badano w dwóch ekosystemach leśnych Słowińskiego Parku Narodowego: w lesie mieszanym (działka I) i borze swieżym (działka II). Ogólny opad ścioły zebrany w swieżym borze wynosił 3,014 t ha-1rok-1 i był mniejszy niż zebrany w lesie mieszanym (4,346 t ha-1rok-1). Najbardziej intensywny opad ścioły obserwowano w miesiącach jesiennych i stanowił on odpowiednio 62,36% i 64,20% rocznego opadu. Ogólnie w ten sposób wprowadzono 46,96 kg ha-1rok-1 azotu i fosforu do gleby działki I i 22,04 kg ha-1rok-1 do gleby działki II. Opad atmosferyczny wzbogacił gleby lasu mieszanego w 33,66 kg ha-1rok-1 azotu i 1,19 kg ha-1rok-1 fosforu, a gleby boru swieżego odpowiednio 23,06 kg ha-1rok-1 i 0,92 kg ha-1rok-1.
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2006, 10
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of a fresh broadleaved forest site and fresh mixed broadleaved forest site on selected parameters and ratios of silver birch (Betula pendula Roth.) wood fibre structure
Autorzy:
Lachowicz, H.
Paschalis-Jakubowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/52429.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
fresh broadleaved forest
fresh mixed broadleaved forest
forest site
wood parameter
silver birch
Betula pendula
wood fibre
wood structure
Opis:
The variability of selected ratios characterising the dimensions and shape of silver birch wood fibres was determined based on the site where the trees grow. Two sampling areas were selected, located in the Biała Podlaska Forest District in eastern Poland. Samples for testing were taken from trees approx. 45–50 years old, growing on a fresh broadleaved forest site and on a fresh mixed broadleaved forest site. On these two sites, silver birch occurs most widely as a dominant species, both in terms of stand area and volume, in Poland. A statistical analysis was performed of selected parameters of the wood fibre structure such as length, width, lumen and cell wall thickness, as well as of the wood fibre structure ratios belonging to the basic properties of fibrous pulp: the felting power, flexibility ratio, coefficient of rigidity, Runkel and Mühlsteph ratios, as well as the compactness index. It was demonstrated that the site from which birch material originates has a significant impact on the average values of: fibre length, lumen, flexibility ratio, and the coefficient of rigidity, as well as the Runkel and Mühlsteph ratios. However, analyses did not prove any major impact of the site on the average values of: fibre width and wall thickness, the felting power or the compactness index of silver birch wood.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2014, 57, 193
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Height-diameter models for mixed-species forests consisting of spruce, fir, and beech
Autorzy:
Petras, R.
Bosela, M.
Mecko, J.
Oszlanyi, J.
Popa, I.
Powiązania:
https://bibliotekanauki.pl/articles/38691.pdf
Data publikacji:
2014
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
height-diameter model
mixed-species forest
tree
spruce
fir
beech
Abies alba
Picea abies
Fagus sylvatica
Opis:
Height-diameter models define the general relationship between the tree height and diameter at each growth stage of the forest stand. This paper presents generalized height-diameter models for mixed-species forest stands consisting of Norway spruce (Picea abies Karst.), Silver fir (Abies alba L.), and European beech (Fagus sylvatica L.) from Slovakia. The models were derived using two growth functions from the exponential family: the two-parameter Michailoff and three-parameter Korf functions. Generalized height-diameter functions must normally be constrained to pass through the mean stand diameter and height, and then the final growth model has only one or two parameters to be estimated. These “free” parameters are then expressed over the quadratic mean diameter, height and stand age and the final mathematical form of the model is obtained. The study material included 50 long-term experimental plots located in the Western Carpathians. The plots were established 40–50 years ago and have been repeatedly measured at 5 to 10-year intervals. The dataset includes 7,950 height measurements of spruce, 21,661 of fir and 5,794 of beech. As many as 9 regression models were derived for each species. Although the “goodness of fit” of all models showed that they were generally well suited for the data, the best results were obtained for silver fir. The coefficient of determination ranged from 0.946 to 0.948, RMSE (m) was in the interval 1.94–1.97 and the bias (m) was –0.031 to 0.063. Although slightly imprecise parameter estimation was established for spruce, the estimations of the regression parameters obtained for beech were quite less precise. The coefficient of determination for beech was 0.854–0.860, RMSE (m) 2.67–2.72, and the bias (m) ranged from –0.144 to –0.056. The majority of models using Korf’s formula produced slightly better estimations than Michailoff’s, and it proved immaterial which estimated parameter was fixed and which parameters were free.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2014, 56, 2
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The stand structure and natural regeneration of Abies alba Mill. in reserves on the northern margin of its distribution in SW Poland
Autorzy:
Szymura, T H
Powiązania:
https://bibliotekanauki.pl/articles/41400.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
stand structure
natural regeneration
Abies alba
silver fir
Wal Trzebnicki area
distribution
seedling density
stand type
Abietetum polonicum
mixed forest
population structure
safe site
Polska
Opis:
The silver fir (Abies alba Mill.) in the area of Wał Trzebnicki is at the northern limit of its distribution in western Poland. This study was performed in three nature reserves with protected silver fir populations. The stands in these reserves were mixed, with complex spatial structure and abundant tree regeneration. The proportion of fir in stands was around 16% of DBHS, the age of trees reached around 130 years. The silver fir occurs mainly in the sapling stage, whereas the number of seedlings was very low. The results of this study show the influence of forest floor vegetation as well as litter type on the emergence of fir seedlings. The seedlings density was compared with the results of other studies from different geographical areas and stands type in Poland.
Źródło:
Dendrobiology; 2007, 57; 55-62
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Species diversity and litter dynamics in secondary mixed deciduous forest, Thung Salaeng Lung National Park, Northern, Thailand
Autorzy:
Podong, C.
Poolsiri, R.
Katzensteiner, K.
Pengthamkeerati, P.
Thongdeenok, P.
Powiązania:
https://bibliotekanauki.pl/articles/38576.pdf
Data publikacji:
2013
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
species diversity
species composition
carbon
nitrogen
litter dynamics
secondary mixed deciduous forest
shifting cultivation
Thung Salaeng Lung National Park
Thailand
Opis:
This study present species composition and potential of litter on carbon and nitrogen return in secondary mixed deciduous forest after shifting cultivation. The dominant species of trees were Haldina cordifolia, Albizia odoratissima and Lagerstroemia duperreana. The Important Value Index (IVI) values of trees were 132.91, 17.78 and 14.22, respectively. The pattern for the decomposition coefficients (k) was highest in the wet period (May–September) and lowest in the dry period (October–April). The carbon and nitrogen return patterns increased in the dry period (October– April) and decreased in the wet period (May–September). Carbon and nitrogen loss in the decomposing litter continually decreased during the decomposition process from the initial levels, with a final relatively rapid release in the wet period. Results from this study was understanding of community composition, litterfall production and litter decomposition for understanding potential of secondary mixed deciduous forest for balancing carbon for mitigating greenhouse gas effect in the local area.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2013, 55, 4
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efekty ochrony rzadkich gatunków roślin na przykładzie zimoziołu północnego Linnaea borealis w rezerwacie Górki
Effects of rare plants species conservation – a case study of twinflower Linnaea borealis in Gorki nature reserve
Autorzy:
Wolańska-Kamińska, A.
Zając, I.
Ratajczyk, N.
Powiązania:
https://bibliotekanauki.pl/articles/989984.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
ochrona przyrody
ochrona gatunkowa
rosliny rzadkie
zimoziol polnocny
Linnaea borealis
zanikanie gatunkow
rezerwat Gorki
dynamika roslinnosci
twinflower
oak−hornbeam forest
mixed coniferous forest
dynamic tendencies
Opis:
The paper presents vegetation changes of Górki nature reserve in terms of their impact on the main subject of conservation – twinflower Linnaea borealis. The research was conducted between 1969 and 1974 and during this investigation a mixed forest Pino−Quercetum was noted. After 50 years of strict protection the studies were repeated to describe the reserve's flora and vegetation dynamics. A considerable decrease in number is particularly observed in species belonging to Vaccinio−Piceetea class. The main subject of conservation withdrew. Nowadays, vegetation evolved into an oak−hornbeam forest Tilio−Carpinetum betuli. Statistically relevant changes have also been noted as regards the soil acidity and the trophic status of the nature reserve's flora, based on ecological indicators.
Źródło:
Sylwan; 2014, 158, 07; 531-538
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ susz na wskaźniki teledetekcyjne grądu wysokiego i boru mieszanego w Lesie Młochowskim - analiza zobrazowań satelitarnych Sentinel-2 lasów objętych ochroną ścisłą oraz gospodarczych w latach 2017-2021
The influence of drought on remote sensing indicators of hornbeam and mixed coniferous forest in the Mlochowski Forest - analysis of Sentinel-2 satellite images of protected and economic forests in 2017-2021
Autorzy:
Kotlarz, J.
Powiązania:
https://bibliotekanauki.pl/articles/2136480.pdf
Data publikacji:
2021
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
susza
grad wysoki
bor mieszany
teledetekcja
Znormalizowany Wskaznik Wegetacji
znormalizowany roznicowy wskaznik wody
wskaznik NDWI zob.znormalizowany roznicowy wskaznik wody
wskaznik wilgotnosci MSI
satelita Sentinel-2
drought
NDVI
NDWI
MSI
Sentinel-2
oak-hornbeam forest
mixed coniferous forest
Opis:
The purpose of this paper was to describe processes that took place in the Łowicz-Błonia plain during the long-term drought of 2018 and the series of short-term droughts in 2019. For our analysis we used multispectral satellite images of high- ground hornbeam and mixed coniferous forest in the Młochowski Forest from 2017–2021. Sentinel-2 images provided the means to investigate the impact of mild droughts on the values of the NDVI (Normalized Difference Vegetation Index), NDWI (Normalized Difference Water Index), and MSI (Moisture Stress Index) as well as their monthly variability and differences between forest divisions. During periods without drought, the variability of all three indices was typical for each phase of the vegetation cycle: in the spring months the value of NDVI and MSI increased, NDWI decreased. During the autumn months, the behavior of the indicators reversed. In the period of long-term drought in 2018, the NDWI was higher in forest divisions with aspecies composition characteristic of a mixed coniferous forest compared to divisions with a higher share of deciduous trees such as oaks and hornbeams, including the rigorously protected area of high–hornbeam forest. NDWI was the only index to show a downward trend during mild droughts, while during moderate droughts, also a decrease in NDVI and MSI was observed. This was most clearly seen in deciduous forests. We did not observed any correlation of NDVI, NDWI, or MSI with the protection status of the forest or the absence thereof
Źródło:
Leśne Prace Badawcze; 2021, 82, 3; 87-100
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The dynamics and structure of dead wood in natural spruce-beech forest stand - a 40 year case study in the Krkonose National Park
Autorzy:
Vacek, S.
Vacek, Z.
Bilek, L.
Hejcmanova, P.
Sticha, V.
Remes, J.
Powiązania:
https://bibliotekanauki.pl/articles/41560.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
forest
natural forest
mixed stand
dynamics
structure
dead wood
spruce-beech forest
European beech
Fagus sylvatica
Norway spruce
Picea abies
Czech Republic
Karkonosze National Park
Opis:
The study deals with long-term dynamics of snags and fallen dead wood from 1970 to 2010 in an unmanaged forest ecosystem dominated by European beech in the Bažinky area, Krkonoše National Park (Czech Republic). The volume of dead wood was estimated from 1970 separately for fallen dead wood (logs) and standing dead wood (snags and stumps). Total dead wood volume on permanent research plot (PRP) 6 increased from 41.9 to 241.6 m3 ha–1 and on PRP 7 from 27.7 to 170.0 m3 ha–1. During 40 year case study the mean total volume of fallen dead wood was 193.3 m3 ha–1 (± 29.8 S.E.) and 96.2 m3 ha–1 (± 19.4 S.E.) and the mean total volume of standing dead wood was 17.4 m3 ha–1 (± 3.4 S.E.) and 12.6 m3 ha–1(± 1.4 S.E.) on PRP 6 and PRP 7, respectively. Comparing tree species, the mean volume of fallen dead wood was significantly higher for Norway spruce than for beech in the decomposition class 1 (F(1, 14) = 5.7, P = 0.03) and significantly higher for beech in the decomposition classes 4 (F(1, 14) = 20.4, P < 0.001) and 5 (F(1, 14) = 25.5, P < 0.001). Dead wood was distributed from randomly to aggregated spatial pattern. Despite the rapid decay of beech wood, the amounts of deadwood are likely to increase further during the next decades with continuing disintegration of the forest stand.
Źródło:
Dendrobiology; 2015, 73
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tekstura karpackiego dolnoreglowego drzewostanu mieszanego o charakterze pierwotnym
Texture of a primeval lower montane mixed forest in the Carpathians
Autorzy:
Kołodziej, Z.
Paluch, J.
Bartkowicz, L.
Pach, M.
Powiązania:
https://bibliotekanauki.pl/articles/989790.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Babiogorski Park Narodowy
regiel dolny
drzewostany mieszane
drzewostany swierkowo-bukowo-jodlowe
las pierwotny
tekstura drzewostanu
sklad gatunkowy
drzewa lesne
liczba drzew
piersnicowe pole przekroju
primeval forest
mixed stands
spatial pattern
structural heterogeneity
diversity index
forest dynamics theory
Opis:
The aim of this study was to characterize the texture of a primeval forest composed of Fagus sylvatica (L.), Abies alba (Mill.) and Picea abies ((L.) H. Karst). Empirical data were collected in the Babia Góra National Park (southern Poland) in the stand being under strict protection since 1934. 259 circular plots with a radius of 7.0 m and an area of 154 m² each were established in nodes of 20×20 m grid. For individual plots and blocks of the combined plots representing gradient of spatial scales between 0.015 and 0.640 ha, the number of trees, diameter at breast height (dbh) distributions, basal areas and the values of structural diversity indices of Gini (GI), Shannon (SH) and Staudhammer−LeMay (STVI) were determined. The indices were also calculated for several types of theoretical distributions. Based on the values obtained for the theoretical distributions, the individual plots and the blocks of the combined plots were classified as representing simple (GI≤0.30;STVI≤0.10), moderately diversified (0.300.45; STVI>0.30) dbh structure. For all the spatial scales analyzed the average values of GI and STVI indices reached the level typical for populations of a high structural diversity (i.e. exceeded the values of 0.45 and 0.30 respectively). According to the GI and STVI values, the portion of stand patches with complex dbh structure ranged from 70.9% and 68.2% at the individual plots scale, respectively, up to 100% in the blocks of 16 plots (4×4). In general, in all the spatial scales analyzed the spatial diversification of the dbh distributions and basal area levels was higher than in managed selection forests and much higher than in managed single−storied stands. The dominant frequency of highly diversified dbh distributions found in the analysed stand was not concordant with the predictions of the forest dynamics theory based on developmental stages, according to which in primeval forests with a significant partition of Abies alba and Picea abies should prevail stand patches of rather simple dbh structure, characteristic for the long−lasting optimum stage.
Źródło:
Sylwan; 2015, 159, 07; 600-609
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
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