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1

Indicatory properties of soil solutions in the characteristics of forest site quality

100%
Porebska G., Sienkiewicz J., Ostrowska A.
Polish Journal of Environmental Studies
|
2004
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tom 13
|
nr 5
We have compared the mean contents of Al, combined Ca + Mg as well as of the total content of elements (Ca, Mg, K, Na, Al, Fe, Mn, NH4, Cl, SO4 and NO3) in solutions obtained for the Ofh, AE and Bv soil horizons. Soils were sampled in dry coniferous (Bs), fresh coniferous (Bsw) and mixed deciduousconiferous (BMsw) forest sites. Higher values of combined Ca and Mg content and of total element content were found in the soil solution of all horizons in BMsw sites than in those in Bs and Bsw sites. The amount of Al migrating to aqueous solution is lower in Ofh horizons of BMsw sites than in Bs and Bsw sites. The soil sorption complex of BMsw sites, likewise respective soil solutions, is more abundant in combined bivalent basic cations than that of Bs and Bsw sites. Exchangeable Al content in the Ofh horizon is lowest in BMsw site, and highest in Bsw site. No direct effect was found on the forest floor vegetation on the concentration of soil solutions (expressed as element sum) or on the ionic composition of these solutions taking into account the elements analyzed.
2

Nocturnal activity of Carabus hortensis L. [Coleoptera, Carabidae] in two forest sites studied with harmonic radar method

75%
Szyszko J., Gryuntal S., Schwerk A.
Polish Journal of Ecology
|
2005
|
tom 53
|
nr 1
The paper deals with a study of the nocturnal activity rhythm of Carabus hortensis L. with applying a harmonic radar system. Beetles with a diode attached to their elytra were set into the terrain and tracked by help of a portable radar. The studies were carried out in a pine forest in which Carabus hortensis L. occurs regularly and in a beech forest in which this species was completely absent. The data show that Carabus hortensis L. is active mainly at the first hours after sunset, independently from time of sunset. A small peak of activity exists at about 9–10 hours after sunset. The nocturnal activity rhythm is similar in both forest sites, but the individuals show significantly higher activity in the beech forest. Based on the assumption that activity is connected with hunger level, the total activity may be useful as indicator of habitat quality (feeding conditions) for Carabus hortensis L.
3

The possibilities and justification for application of Scots pine natural regeneration on coniferous forest sites

75%
Kopryk W., Paluch R., Gil W.
Seria Biologiczna. Uniwersytet im. Adama Mickiewicza w Poznaniu
|
2004
|
tom 69
4

Enzymatic activity of soils in forest sites of the Western Beskid Mountains

75%
Lasota J.
Polish Journal of Soil Science
|
2006
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tom 39
|
nr 1
Research carried out in the Western Beskid Mountains (Silesian Beskid, Beskid Mały and Beskid Żywiecki Mts) attempted to characterise the enzymatic activity of soils in various forest sites and associations. Twenty study plots were established to represent a range of sites and associations of the lower and upper mountain forest zones. The soils were analysed for the activity of dehydrogenases and phosphatases. Enzymatic activity was compared in the top soil (humus-accumulating mineral horizons) and soil columns of 1 dm² cross-section and 50 cm in depth. It was found that the activity of the studied enzymes, especially dehydrogenases, varied between the soils, suggesting that soils from different types of sites or associations have different microbiological activities. The results of the research contribute to the development of microbiological activity patterns for near-natural mountain forest sites and associations. Based on such patterns it would be possible to assess deterioration changes occurring in forest soils.
5

Climate - a changing component of forest site

63%
Kowalski M.
Folia Forestalia Polonica. Series A . Forestry
|
1991
|
tom 33
6

The sites of wild cherry stands in foothills of the Bieszczady Mountains

63%
Lasota J., Pacanowski P.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
|
2008
|
tom 07
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nr 4
21-34
7
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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

63%
Lachowicz H., Paschalis-Jakubowicz P.
Drewno. Prace Naukowe. Doniesienia. Komunikaty
|
2014
|
tom 57
|
nr 193
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.
8

Growth, biomass allocation and nutrients accumulation in needles of Abies alba seedlings growing three years on humus from different forest sites

63%
Robakowski P., Komisarek J., Nowinski M., Bulaj B.
Acta Physiologiae Plantarum
|
2007
|
tom 29
|
nr 1 Suppl.
9

Individual and population parameters of Carex pilosa Scop. [Cyperaceae] in four forest sites in Western Carpathians [Slovakia]

63%
Kuklova M., Kukla J., Schieber B.
Polish Journal of Ecology
|
2005
|
tom 53
|
nr 3
The sedge Carex pilosa Scop. was studied in beech forest sites situated on 470 m a.s.l. (Kremnické Vrchy Mts), 1290 m a.s.l. (Poľana Mts), 1275 m a.s.l. (Vtáčnik Mts) and 1170 m a.s.l. (Veľká Fatra Mts) in the Western Carpathians (Central Slovakia). The degree of leaf necrotisation was considerably lower in site Kremnické Vrchy Mts. The shortest mean length of shoots was observed in the Poľana Mts (27.3 cm) and the Kremnické Vrchy Mts (36.6 cm), i.e. in forest sites with lack of light in herb layer, the longest in the Veľká Fatra Mts (43.1 cm) and the Vtáčnik Mts (48.8 cm) with looser canopy of forest stands. The mean density of shoots (222> 211> 181> 26 per 1m²), aboveground weight of a one shoot (0.386> 0.345> 0.303> 0.166 g), phytomass (85.7> 72.8> 54.8> 6.2 g m⁻²) and energy storage (1669.4> 1326.5> 1052.8> 119.1 kJm⁻²) of Carex pilosa populations decreased in the following order according the sites: Vtáčnik Mts> Kremnické Vrchy Mts> Veľká Fatra Mts> Poľana Mts. Different sequence was in case of the mean energy content: Vtáčnik Mts> Poľana Mts> Veľká Fatra Mts> Kremnické Vrchy Mts. Significant differences in mean shoot length were found between Carex pilosa population growing in lowest site (Kremnické Vrchy Mts) and populations growing in highest sites (Vtáčnik Mts, Veľká Fatra Mts) with different climatic conditions. The energy content was distinctively higher in the case of the highest situated plots (19.21–19.48 kJ g⁻¹) in comparison with the lowest situated site at the Kremnické Vrchy Mts (18.22 kJ g⁻¹). The insignificant differences were found only between the Poľana Mts and Veľká Fatra Mts plots. Differences in the mean shoot weight were insignificant.
10

Microbial biomass versus soil fertility in forest sites

63%
Zwolinski J.
Polish Journal of Ecology
|
2004
|
tom 52
|
nr 4
Soil chemistry, soil microbial biomass and mineralization rate of organic matter (OM) were estimated on plots, which were set up in Scots pine and Norway spruce forests in southern Poland. The aim of the study was to assess the relations between soil microbial biomass and chemical parameters associated with soil fertility. The size of microbial biomass was found to be significantly correlated with chemical parameters reflecting soil nutritional status (content of base cations, cation exchange capacity, base saturation) and organic matter quality (Corg to macronutrients ratios). In addition, soil microbial biomass appeared to be strongly correlated with OM mineralization rate. These findings point out a distinct relationship between soil fertility and soil microbial biomass, suggesting that microbial biomass measurements provide a valid estimate of soil quality.
11

Seasonal changeability of enzymatic activity in soils of selected forest sites

51%
Blonska E.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
|
2010
|
tom 09
|
nr 3-4
Seasonal changeability of soil enzyme activity has not been entirely known. The aim of the paper was presenting the seasonal changeability in enzyme activity in fresh forest sites. From 10/06/2007 to 20/06/2008 samples were taken seven times at 6-weeks' intervals from two sample plots representing sites Lśw, LMśw, BMśw and one for Bśw site. Activity of dehydrogenase, protease and urease have been marked in the soil samples. As a result of conducted research the minimum value for enzymatic activity was found in October 2007 and April 2008. Maximum values for the activity of studied enzymes were noted in January and June 2007 and 2008, while no statistically significant differences were found between enzymatic activity marked in June 2007 and June 2008.
12

Characteristics of horizontal deformation of some forest soils

51%
Kormanek M., Walczykova M.
Electronic Journal of Polish Agricultural Universities. Series: Forestry
|
2005
|
tom 08
|
nr 4
13

Ecological groups of vascular plant species in the herb layer of the pine forests of Northern and Central Europe

45%
Roo-Zielinska E.
Polish Journal of Ecology
|
2003
|
tom 51
|
nr 4
The species of vascular plants of the herb layer, were studied on ten forest sites representing pine forests of the alliance Dicrano-Pinion. These sites are located along the N-S transect in Northern and Central Europe, between 50°28′ and 70°09′ N - in Norway (NO1), Finland (FN1, FN2, FN3), Estonia (ES1), Latvia (LT1), Lithuania (LI1), and Poland (PL1, PL2, PL3). The relation was determined between the geographical location of these forests and the proportion in total species number and cover of the plants in the herb layer with known ecological, habitat and climatic requirements for light (L) and temperature (T) and soil requirements for moisture (F), acidity (R), and content of nitrogen (N). The indication method was applied using the species scale of Ellenberg et al. (1991), indicating the climatic and habitat requirements of the plant species on the basis of the values of the L, T, F, R and N in the macroclimatic gradient. The species which behave in a similar manner with respect to the habitat factors mentioned were clustered into the indicator species groups. The distinct directional changes of the share of these groups along the North-South transect were observed: 1) gradual appearance of the species characteristic for the moderately warm areas; 2) decrease of the share of the hygrophilous and acidophilous species.
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