Wyniki wyszukiwania

1

Habitat preferences of the forest dormouse [Dryomys nitedula] in lowland forests

100%

Nowakowski W. K., Boratynski P.

Polish Ecological Studies

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1997

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tom 23

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nr 3-4

2

Yellow-necked mouse attacked a dead bank vole

100%

Zejda J.

Acta Theriologica

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2002

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tom 47

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nr 2

An unique observation was made when an adult yellow-necked mouse Apodemus flavicollis (Melchior, 1834) attacked a dead bank vole Clethrionomys glareolus (Schreber, 1780).

3

Decomposition of fine woody debris from main tree species in lowland oak forests

84%

Ostrogovic M. Z., Marjanovic H., Balenovic I., Sever K., Jazbec A.

Polish Journal of Ecology

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2015

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tom 63

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nr 2

Decomposition is an important carbon flux that must be accounted for in estimates of forest ecosystem carbon balance. Aim of this research is to provide estimate of fine woody debris decomposition rates for different tree species and sample sizes also taking into account the influence of specific microsite meteorological conditions on decomposition rates. In this paper we present results of the first two years of the experiment designed to last six years. Study was conducted in managed lowland oak forest in central Croatia. Decomposition rates (k) of fine woody debris (diameter 0.5–7 cm) for four species (Querus robur L., Carpinut betulus L., Alnus glutinosa Gaernt., Fraxinus angustifolia L.) in four size classes were estimated using litter bag method and mass loss equation of Olson (1963). Overall average k in our study was 0.182 ± 0.011 year-1. Results indicate that decomposition rate is affected by the size of the debris, with the smallest diameter branches (<1 cm) decomposing is significantly faster (k = 0.260 ± 0.018, P <0.05) than the larger one. Tree species from which debris had originated also affected decomposition, although to a lesser extent, with hornbeam samples having significantly (P <0.05) higher average decomposition rate (0.229 ± 0.028), compared to that of ash samples (0.141 ± 0.022). Proportion of variability in k explained by variables ‘species’ and ‘size class’ was assessed with general linear model (R² = 0.644) also taking into account variables like soil temperature and soil water content. Sample size class explained 22.2%; species explained only 9.4%, while soil water content and temperature combined explained 32.8% of the variance of k. Rate constants obtained within this study might be useful in modelling ecosystem carbon balance for similar lowland forest ecosystems in Europe.

4

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Tree species diversity and above-ground biomass of natural temperate forest: montane versus lowland forest

84%

Gazda A., Miscicki S., Chwistek K.

Dendrobiology

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2015

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tom 73

We studied the relationship between tree-species diversity and the above-ground biomass on an example of two natural Polish forest with different altitiudinal range, plant species pool, vegetation and climatic conditions. The study sought to determine whether: (1) above-ground biomass in natural forests correlates with tree-species diversity irrespective of the kind of forest (montane or lowland), and (2) the relationship in question is negative, (3) the above-ground biomass is greater in montane forests than in lowland ones. Natural forests present in 1º Polish Gorce Mountains (montane forest) alongside comparable data for the 2º world-renowned lowland forest that is present in the Białowieża National Park. Data were collected within 558 sample plots (á 200-square-metre). The diameter at breast height of all trees with girths of or exceeding 12 cm was measured. To compute above-ground biomass we calculated dry masses for each tree on the basis of values for dbh and height, next we summed these values for all species present within each plot. The number of tree species on a plot ranged from only one (mainly in spruce stands) to six (in mixed deciduous lowland forest stands). The above-ground accumulated biomass ranged from 6 to 1155 (average 251±13) t ha–1 within the lowland forest, and from 2 to 849 (average 242±8) t ha–1 within the montane forest. We concluded that there was a humped-back shaped relationship between tree-species diversity and above-ground biomass in both lowland and montane natural forests.

5

The influence of variability of water resources in lowland forests on selected parameters describing the condition of trees

67%

Tyszka J., Stolarek A., Fronczak E.

Papers on Global Change

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2014

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nr 21

The influence of water conditions on the condition and growth of tree stands has been analysed in the context of the climatic and hydrological functions forest plays. Long observational series obtained for precipitation, outflow and depths below the surface of the water table have been put together with measured increases in the breast-height diameters of Scots pines and the severity of crown defoliation observable in selected tree species growing on the Polish Lowland, in order to determine the overall scope to the reaction stand condition manifests in the face of ongoing variability of water conditions within forest. An overall improvement in the condition of stands over the last 20 years does not disguise several-year cyclicity to changes capable of shaping the situation, i.a. departures from long-term mean values for precipitation totals and groundwater levels. The condition of stands is seen to worsen in both dry and wet years. Analysis of the degree to which pine, spruce and broadleaved stands experience defoliation points to spruce stands responding most to extreme hydro-climatic conditions. Extreme situations as regards water resources were seen to involve a response over two-year time intervals in the case of coniferous stands. Unsurprisingly, optimal growing-season (June-September) precipitation totals correspond with long-term average figures, while being slightly higher for spruce (at 384 mm), than for Scots pine or broadleaved species (375 mm). The relationships reported gain confirmation in analysis of periodic change in breast-height diameter increments characterising Scots pines, whose growth is seen to depend closely, not only on precipitation, but also above all on the depth of the water table in the summer half-year. Optimal depths of the water table proved to be different, being around 20 cm below ground in the case of marshy coniferous forest, 80 cm in wet habitats, and 135 cm in fresh habitats. Depending on the possibilities for water to soak into the rooting zone of trees there were even twofold differences in measured growth increments in Scots pine (as the dominant species in Poland’s lowland habitats). The maintenance of stable water conditions (as the most variable environmental factor in forest) should be an overriding aim of management activity in this habitat. When account is taken of the influence of the state of water resources on biomass production, and then on the intensity of evapotranspiration and the absorption of carbon dioxide from the atmosphere, it is seen how important it is to achieve improvements in water conditions in forests, as such an important factor in combating climate change.

6

Similarity between seed bank and herb layer in a natural deciduous temperate lowland forest

67%

Wodkiewicz M., Kwiatkowska-Falinska A. J.

Acta Societatis Botanicorum Poloniae

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2010

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tom 79

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nr 2

157-166

Forest seed banks mostly studied in managed forests proved to be small, species poor and not reflecting aboveground species composition. Yet studies conducted in undisturbed communities indicate a different seed bank characteristic. Therefore we aimed at describing soil seed bank in an undisturbed forest in a remnant of European lowland temperate forests, the Białowieża Forest. We compared similarity between the herb layer and seed bank, similarity of seed bank between different patches, and dominance structure of species in the herb layer and in the seed bank of two related oak-hornbeam communities. We report relatively high values of Sorensen species similarity index between herb layer and seed bank of both patches. This suggests higher species similarity of the herb layer and soil seed bank in natural, unmanaged forests represented by both plots than in fragmented communities influenced by man. Although there was a set of core seed bank species present at both plots, yielding high Sorensen species similarity index values, considerable differences between plots in seed bank size and dominance structure of species were found, indicating spatial variability of studied seed bank generated by edaphic conditions. Dominance structure of species in the herb layer was not reflected in the underlying seed bank. This stresses, that natural forest regeneration cannot rely only on the seed bank, although some forest species are capable of forming soil seed banks. While forest seed banks may not reflect vegetation composition of past successional stages, they may inform on history and land use of a specific plot.

7

On the problem of actuopalynology in the Carpathians and Caucasus

67%

Stuchlik L., Kvavadze E. V.

Acta Palaeobotanica

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1995

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tom 35

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nr 1

8

Raphidioptera and Neuroptera [Neuropterida] of the canopy in montane, upland and lowland fir forests of Abies alba Mill. in Poland

67%

Czechowska W.

Fragmenta Faunistica

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2002

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tom 45

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nr 1

Ograniczanie wyników

Habitat preferences of the forest dormouse [Dryomys nitedula] in lowland forests

Yellow-necked mouse attacked a dead bank vole

Decomposition of fine woody debris from main tree species in lowland oak forests

Tree species diversity and above-ground biomass of natural temperate forest: montane versus lowland forest

The influence of variability of water resources in lowland forests on selected parameters describing the condition of trees

Similarity between seed bank and herb layer in a natural deciduous temperate lowland forest

On the problem of actuopalynology in the Carpathians and Caucasus

Raphidioptera and Neuroptera [Neuropterida] of the canopy in montane, upland and lowland fir forests of Abies alba Mill. in Poland