Temat: natural forest - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Changes in runoff as an indicative measure of water retention status in the Bialowieza Primeval Forest
Autorzy:: Tyszka, J.
Stolarek, A.
Powiązania:: https://bibliotekanauki.pl/articles/38663.pdf
Data publikacji:: 2013
Wydawca:: Instytut Badawczy Leśnictwa
Tematy:: run-off change
measurement
water retention
natural forest
Bialowieza Forest
Opis:: The study concerned changing status of water retention within an unique nature complex of the Białowieża Primeval Forest. The retention was evaluated based on an analysis of research results on water outflow from the lowland catchment of the river Łutownia – representative for physiographic conditions as well as those of habitats and tree stands in Poland’s part of the Forest. The catchment in the lowland hydrometric dissection at the Pogorzelce village – Old Białowieża Wilderness, covers the area of 120.1 km2 with natural flow conditions preserved. A unified sequence of measurements carried out since 1966 using unchanged methodology with respect to precipitation, air temperature and forest management status allowed to separate different phases of changes occurring in water resources of this protected forest complex. There were appraised periodical runoff changes and cycles including a decrease in water resources which occurred at the turn of the century. The retention capacity of the catchment was determined based on periodical changes in rainfall-runoff relations and the ongoing process of deteriorating water conditions of forest ecosystem was interpreted.
Źródło:: Folia Forestalia Polonica. Series A . Forestry; 2013, 55, 2
0071-6677
Pojawia się w:: Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Earthworm species as pointer for herbaceous flora distribution and health of soil in Onigambari Forest Reserve, Oyo state Nigeria
Autorzy:: Onafurume, O. M.
Powiązania:: https://bibliotekanauki.pl/articles/1076651.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Earthworms
Floristic composition
Natural forest
Relative importance value
Soil fertility
Opis:: Amongst various and diverse organisms, earthworms (Annelida: Oligochaeta) are the most important components of soil biota when it comes to soil formation and maintenance of soil structure and fertility. The presence of earthworms modifies the soil quality of the environment due to their burrowing and casting. This affects the activities of other organisms. Thus, they are also termed “ecosystem engineers”. However, while we begin to understand the role of surface casts, it is still unclear to what extent plants utilize subsurface casts. This work is a study of the floral community structure as influenced by surface cast so as to determine the functional groups of earthworms in the natural forest zone of Onigambari Forest Reserve. This reserve is located at latitude 07°25’N and longitude 3°53’E within the low and semi-deciduous forest belt of Nigeria. It is divided into two: natural and plantation forests. Herein, the simple random sampling technique was used to select 10 geo-referenced plots (15m × 15m each). Three 1.0m × 1.0m square quadrats were randomly laid on each plot to give 30 sampling points surveyed for data collection. Data were collected on floral composition, relative importance values (RIV), earthworm composition and diversity, and physicochemical components of the soil. Twenty eight herbaceous plants were enumerated. Andropogon gayanus had the highest relative importance value (RIV) of (20.499), while Acroceras zizanoides and Platostoma africanum had the least RIV (1.1782) amongst other four. Seven earthworm species were enumerated, with Eisenia fetida having the highest RIV (28.571), while Octoclasion cyaneam and Lumbricum rubellus had the least. The species richness of earthworms was high (0.8061) and evenly distributed (0.8405), but with a low diversity (H’ = 1.772). There are two functional groups of earthworm in the natural forest zone, seven were surface dwelling, while only Lumbricus terrestris was sub-surface dwelling. The health of flora and soil of the natural forest zone of Onigambari forest reserve is low. Prevention of outside influence on the forest zone, seeding and deposition of organic waste matter to the soil are strategies that would enhance abundance and diversity of earthworms in the natural forest zone.
Źródło:: World News of Natural Sciences; 2019, 26; 80-95
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Changes in horizontal structure of natural beech forests on an altitudinal gradient in the Sudetes
Autorzy:: Vacek, Z.
Vacek, S.
Bilek, L.
Remes, J.
Stefancik, I.
Powiązania:: https://bibliotekanauki.pl/articles/41453.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: structural change
horizontal structure
natural forest
beech forest
European beech
Fagus sylvatica
forest dynamics
altitudinal gradient
Sudetes Mountains
Opis:: The article describes horizontal structure of the tree layer, natural regeneration, snags and crown projections of natural beech stands on three permanent research plots in the wide altitudinal range in the Krkonoše Mts (Czech Republic). The spatial structure was classified from 1980 to 2010 and subsequently the prediction of spontaneous development with an outlook for 30 years (to 2040) was done by growth simulator. Hopkins-Skellam index, Pielou-Mountford index, Clark-Evans index and Ripley’s K-function were calculated. Further, the vertical structure and total diversity index was evaluated. The horizontal structure of individuals in the tree layer had not changed significantly during the monitored years. Tree spatial pattern of the lowest altitude lying herb-rich beech forest was mostly regular to random, in acidophilous mountain beech forest predominantly random and in fragments of beech groups around the timberline aggregated. Juvenile growth on all investigated plots was distributed aggregated and snags randomly. The horizontal structure of crown projection centroids had always higher values toward the regularity than tree layer and was random to regular. The result of principal component analysis also confirmed that spatial pattern was dependent on the altitude, but also on the number of trees.
Źródło:: Dendrobiology; 2015, 73
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: System klasyfikacji gospodarstw leśnych w wielofunkcyjnym i proekologicznym modelu leśnictwa
A classification system of stands in a proecological model of multifunctional forest managment
Autorzy:: Przybylska, K.
Powiązania:: https://bibliotekanauki.pl/articles/1023086.pdf
Data publikacji:: 2005
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo wielofunkcyjne
klasyfikacja
gospodarstwa lesne
lesnictwo
lesnictwo proekologiczne
economic division
natural forest type
forest stand type
forest function
Opis:: The paper presents the concept of a schematic division of a forest into stand farms using two criteria i.e. forest function and natural forest type. Forest function is understood as the function dominating in a stand, namely productive, protective or social. The natural forest type was identified with the name of a habitat type because in forest typology habitat characteristics and stand attributes are treated jointly.
Źródło:: Sylwan; 2005, 149, 09; 3-9
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Wpływ rozpadu drzewostanów w wyniku gradacji kornika drukarza (Ips typographus) na zagrożenie pożarowe Puszczy Białowieskiej
Impact of forest stands dieback as a result of bark beetle (Ips typographus) outbreak on the fire risk in the Białowieża Forest
Autorzy:: Szczygieł, Ryszard
Kwiatkowski, Mirosław
Tyburski, Łukasz
Powiązania:: https://bibliotekanauki.pl/articles/18055683.pdf
Data publikacji:: 2023
Wydawca:: Instytut Badawczy Leśnictwa
Tematy:: bezpieczeństwo
biomasa
las naturalny
materiał palny
martwe drewno
pożar lasu
safety
biomass
natural forest
flammable material
dead wood
forest fire
Opis:: Białowieża Forest, due to its unique character, requires a specific approach to the management of this area, including fire risk assessment. This is particularly important with regard to the recent bark beetle (Ips typographus) outbreak, which has contributed to the local dieback of Norway spruce stands on a total area of approx. 11.5 thousand hectares during the 2012-2022 period. The article presents the most important results of the implemented projects related to the fire protection of the Białowieża Forest. The analysis of potential fire hazard should take into account both dead wood and the impact of tree stand dieback, which resulted in the emergence of grasses as the dominant plant cover that poses a high risk not only for the possibility of fire, but also for its rapid spread. During 2012-2022 fuelload of the studied areas increased almost sevenfold compared to 2011 (15.8 t/ha), reaching an average maximum value of 108.9 t/ha in 2017. However, the progressive decomposition of dead wood and the decreasing amount of fine combustible material (fire-active biomass) caused that the fire risk in turn gradually decreased. After a period of about 10 years after the stand dieback, the fire risk caused by the dead wood left behind has reached a minimum level and the possibility of initiating the burning of such material was significantly reduced. Despite the decreasing fire hazard from dead wood, the fire risk will remain high for many years due to the presence of grass cover, especially during periods when it dries out. The analysis of the fire risk in the Białowieża Forest caused by the spruce bark beetle outbreak formed the basis for the development of the "Fire Protection and Forest Fire Fighting Plan for the Polish Part of the Białowieża Forest Transboundary World Heritage Site", which includes: fire risk assessment, fire detection, communication and alarm system, fire roads, water stores, equipment for fire fighting and rules for conducting rescue and fire-fighting operations.
Źródło:: Leśne Prace Badawcze; 2023, 83; 1-15
1732-9442
2082-8926
Pojawia się w:: Leśne Prace Badawcze
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

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

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Skocz do pozycji: 7.

Tytuł:: Shoot morphology and leaf gas exchange of Fagus sylvatica as a function of light in Slovenian natural beech forests
Autorzy:: Cater, M.
Powiązania:: https://bibliotekanauki.pl/articles/41573.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: shoot
plant morphology
leaf
gas exchange
Fagus sylvatica
light
Slovenia
natural beech forest
beech forest
plant growth
Opis:: Five plots with young beech trees of the same age (13–15 years) were established to study the threshold, where plagiotropic growth becomes evident as the consequence of the reduced light intensity. Trees were equally distributed along the light gradient and were divided according to light conditions (Indirect Site Factor, ISF) into three groups of stand conditions: close canopy stand (ISF<20), edge (2025). Morphological and physiological responses of young beech were studied between managed and old growth forest and between different forest complexes (Pohorje and Kocevje region) on natural beech sites. Criteria for the plagiotrophic growth was the relation between tree length and tree height (l/h) under various light conditions. Under controlled conditions (temperature, flow and CO2 concentration, RH, light intensity) light saturation curves of leaf net photosynthesis were measured on same trees to compare both responses between different light categories and different plots within comparable light conditions. Our study confirmed different thresholds for morphologic response between two forest complexes as well as between old growth and managed forest. Results were in accordance with physiological responses: the value of limiting light for a plagiotropic response was lower in Kocevje (17% ISF) than on Pohorje (25% ISF).
Źródło:: Dendrobiology; 2010, 64
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Carbon Accumulation Potential from Natural Forest Regrowth of Godech Municipality, Western Bulgaria
Autorzy:: Grigorov, Borislav
Powiązania:: https://bibliotekanauki.pl/articles/1943257.pdf
Data publikacji:: 2021
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: natural forest regrowth
climate change mitigation
carbon sequestration
aboveground biomass
Bulgaria
naturalny odrost lasu
zmiany klimatu
sekwestracja dwutlenku węgla
biomasa nadziemna
Bułgaria
Opis:: The present research deals with carbon sequestration, as an important process for mitigating the effects of climate change. The investigation focuses on a 30-year period and it covers only aboveground biomass that builds up from natural forest regrowth, excluding any plantation techniques. Potential carbon sequestration rate from natural forest regrowth in Godech Municipality was measured in Mg C ha⁻¹ yr⁻¹ and the resolution of the map was 1x1 km. The results of the study display that carbon accumulation values in the researched area were consistent with those that were expected in the largest parts of Bulgaria. The biggest share of Godech Municipality falls within the range of 0.82 – 0.96 Mg C ha⁻¹ yr⁻¹ with restricted areas around the villages of Barlya, Smolcha, Gubesh, Murgash and Varbnitsa that may accumulate between 0.96 – 1.11 Mg C ha⁻¹ yr⁻¹. In conclusion, carbon accumulation only from natural forest regrowth provides representative information, however it would have been better if different plantation techniques were regarded as well. The successful results of the investigation should encourage other studies of this type in the neighbouring municipalities.
Źródło:: Civil and Environmental Engineering Reports; 2021, 31, 1; 192-199
2080-5187
2450-8594
Pojawia się w:: Civil and Environmental Engineering Reports
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Biogrupy drzew w lesie naturalnym: czy prof. Włoczewski miał rację?
Tree biogroups in natural forests: was prof. Włoczewski right?
Autorzy:: Brzeziecki, B.
Powiązania:: https://bibliotekanauki.pl/articles/1024241.pdf
Data publikacji:: 2004
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: biogrupy
las naturalny
lesnictwo
Bialowieski Park Narodowy
rozmieszczenie przestrzenne
drzewa lesne
białowieża national park
contagion index
natural forest
permanent plot
spatial pattern
tree biogroup
Opis:: The contagion index [Gadow i in. 1998] is used to analyse a spatial pattern of trees in a natural forest stand occurring on a permanent study plot, located in a compartment 319 of the Białowieża National Park. By means of this index it is found that at a small spatial scale, the random occurrence of trees is a dominating mode of tree spatial pattern. At the same time, the share of trees forming biogroups is estimated to ca. 25% (at average). The results are compared with similar analysis performed by means of the Donnelly index and the Ripley's K function.
Źródło:: Sylwan; 2004, 148, 07; 3-10
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: The Effect of Environmental Stressors on Respiration Activity of Afforested Mine Soils
Wpływ stresogennych czynników środowiskowych na tempo respiracji zalesionych gruntów kopalnianych
Autorzy:: Pudełko, A.
Sroka, K.
Powiązania:: https://bibliotekanauki.pl/articles/386134.pdf
Data publikacji:: 2017
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: wskaźnik respiracji gleby
gleby industroziemne
naturalne gleby leśne
cykle susza-wilgoć
cykle mrożenia-rozmrażania
soil respiration rate
mine soils
natural forest soils
dry-wet cycles
freeze-thaw cycles
Opis:: Funkcje gleb silnie zależą od aktywności mikroorganizmów i ich zdolności do przeciwstawiania się różnym stresom środowiskowym. Celem pracy było porównanie wpływu dwóch często występujących czynników stresowych – cykli susza-wilgoć i mrożenie-rozmrażanie – na respirację gleb industrioziemnych i gleb naturalnych. Próbki gleby (n = 18) zostały pobrane na zrekultywowanych terenach kopalni piasku w Szczakowej oraz w lasach naturalnych w jej sąsiedztwie. W próbkach oznaczono zawartość materii organicznej, tempo respiracji, pH i przewodność elektrolityczną. Badane próbki z gleb industroziemnych i naturalnych miały podobne uziarnienie i zostały sklasyfikowane jako piaski gliniaste. Gleby naturalne zawierały znacznie więcej OM [%] niż gleby industrioziemne, natomiast obie rozpatrywane kategorie gleb nie róż- niły się znacząco pod względem pH. Ponadto nie zaobserwowano istotnych różnic w zawartości materii organicznej, pH i uziarnienia gleb w próbkach pobranych pod różnymi drzewostanami (sosna, brzoza, modrzew). Gleby industroziemne wykazywały znacznie niższe początkowe wartości respiracji (1,34 μg C-CO2 g−1 24 h−1 ) niż gleby naturalne (3,13 μg C-CO2 g−1 24 h−1 ). Pięciocyklowy proces mrożenia-rozmrażania zredukował skumulowane wartości wydzielania CO2 zarówno w industrozimenych, jak i naturalnych glebach o odpowiednio 17,8% i 6,7%. Ponadto reakcja na wskaźnik respiracji w cyklu susza-wilgoć różniła się znacząco w przypadku gleb industroziemnych i naturalnych: w glebach naturalnych wszystkie cykle suszenia-nawadniania zwiększały wartość respiracji, przy czym wzrost ten był bardziej widoczny w ostatnich dwóch cyklach. Podsumowując, można stwierdzić, że okresy suszy w lecie i mrożenia-rozmrażania jesienią oraz wiosną mogą wywierać bardziej negatywny wpływ na leśne ekosystemy na ternach zrekultywowanych niż na obszarach występowania naturalnych drzewostanów.
The functioning of soils strongly depends on the activity of the soil microbial communities and their ability to withstand different environmental stresses. The aim of this work is to compare the effect of two frequently occurring stressors (drought-rewet and freeze-thaw cycles) on the basal respiration rate of mine and natural soils. Soil samples (n = 18) were delivered from the Szczakowa open-cast sand quarry in Poland. The samples were measured for organic matter (OM) content, basal respiration, pH levels, and electric conductivity. The studied mine and natural soils had a similar texture and were classified as loamy sands. The natural soils contained significantly more OM than the mine soils but did not differ in terms of pH. There were no significant differences in the OM content, pH, and texture of the soils under the studied tree species (Pine, Birch, Larch). Mine soils exhibited significantly lower initial respiration rate (RESP value) than the natural soils (1.34 μg C-CO2 g−1 24 h−1 vs. 3.13 μg C-CO2 g−1 24 h−1 ). Five freeze-thaw cycles reduced cumulative CO2 evolution both in both the mine and the natural soils by 17.8% and 6.7%, respectively. Moreover, the reaction of the respiration rate to dry-rewet cycles differed distinctly between the mine and natural soils. In the natural soils, all dry-rewet cycles increased the respiration rate, wherein the increase was much more pronounced in the last two cycles. We conclude that periods of drought in the summer and freeze-thaw events in the autumn and spring may have a stronger negative effect on the functioning of forest ecosystems in the reclaimed lands than in natural stands.
Źródło:: Geomatics and Environmental Engineering; 2017, 11, 4; 97-110
1898-1135
Pojawia się w:: Geomatics and Environmental Engineering
Dostawca treści:: Biblioteka Nauki

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