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G. Ollesch - One of the best experts on this subject based on the ideXlab platform.

  • Short-term impact of Coppice management on soil in a Quercus ilex l. stand of Sardinia
    Land Degradation & Development, 2016
    Co-Authors: Andrea Vacca, Francesco Aru, G. Ollesch
    Abstract:

    The short-term impact of coppice-with-standards management on soil in a Mediterranean holm oak forest was assessed to contribute to address appropriate recommendations to minimize possible negative effects of the silvicultural practices. For this purpose, soil surface features and topsoil properties were investigated in two representative areas located in a public forest in southwest Sardinia (Italy) and coppiced in the periods November 2012–March 2013 and November 2011–March 2012, respectively. Regardless of differences in soils and slope gradient, the same management, in terms of final density of trees standing after the clear-cut and accumulation of Brushwood in strips along the maximum slope gradient, was applied in both areas. Field observations and laboratory data highlighted the disturbances caused to the soil by the silvicultural practices in the stands when compared with the undisturbed stands. These disturbances involved the almost complete removal of organic horizons, with consequent negative impact on organic carbon content, and the activation of erosion processes, mostly related to rainsplash erosion. Although soil mobilization locally largely exceeded the tolerable erosion rates, no extreme rainfall events occurred after the coppicing to produce critical situations at the catchment level. The adjustment of the final density of trees standing after the clear-cut in relation to soil properties, slope gradient and the possibility of extreme rainfall events, a different Brushwood management and the restriction to the passage of wild animals would have strongly reduced the negative impacts on soils. © 2016 The Authors. Land Degradation and Development published by John Wiley & Sons, Ltd.

Feng Xue-quan - One of the best experts on this subject based on the ideXlab platform.

  • NATURAL CHINESE PINE(Piuns tabulaeformis) IN WUNLING MOUNTAIN NATURE RESERVE
    Hebei Journal of Forestry and Orchard Research, 2004
    Co-Authors: Feng Xue-quan
    Abstract:

    Natural Chinese pine(Pinus tabulaeformis)in Wuling Mountain Nature Reserve cosists of 53 species of plant, which belong to 46 genus of 29 families. There are 16 phaeneropytes, 22 chamaephytes, 15 hemicryplophytes, annoul herbaceous and geocryplophytes in biological spectrum of the commumity. The community is divided into tree layer, Brushwood layer, herb layer and plant without layer. It is dominated by Pinus tabulaeformis with importance value (I.V.) of 270.25 in tree layer,by Weigela florida(I.V.=95.73) and Lespedeza bicolor(I.V.=75.14),Rubus crataegifolius(I.V.=31.54) in Brushwood layer, by Carex lanceolata(I.V.=98.26),Saussurea nirea(I.V.=51.78) in berb layer.

  • DISTRIBUTION,COMPOSITION AND FEATURES OF BIRCH (Betula platyphylla) FOREST IN WULING MOUNTAIN NATURE RESERVE
    Hebei Journal of Forestry and Orchard Research, 2003
    Co-Authors: Feng Xue-quan
    Abstract:

    The researches on Betula platyphylla forest were carried out in Wuling Moutain Nature Reserve. The area of this kind of forest is 1 195 hm 2 in Wuling Moutain. It consists of 65 species of plant,which belong to 59 genus of 34 families.The community is divided into tree layer, Brushwood layer,herb layer and plant without layer. It expounded its distribution,habitat, physiognomy characteristics,structural feature,and forecast of the succession dynamic status of Betula platyphylla forest was put forward.

  • MIXED FOREST OF Tilia amurensis WITH Quercus mongolica IN WULING MOUNTAIN NATURE RESERVE
    Hebei Journal of Forestry and Orchard Research, 2001
    Co-Authors: Feng Xue-quan
    Abstract:

    The researches on Tilia amurensis mixed Quercus mongolica forest were carried out in Wuling Mountain Nature Reserve. The mixed forest has 193 3 hm 2 in Wuling Mountain.It cosists of 52 species of plant,which belong to 41 genus of 29 families.The community is divided to tree layer , Brushwood layer , herb layer and plant without layer. It dominated by Tilia amurensis with importance value ( I V ) of 173 81 and dominated by Quercus mongolica ( I V =60 84) in tree layer, by Deutzia grandiflora (I V =53 09), D. parviflora (I V =39 09), Corylus mandshurica (I V = 38 17) in Brushwood layer, by Carex rigescens(I V =97 19) and C. lanceolata(I.V. =38 66)in herb layer.The community is divided into 11 synusiae and dominat synusia is deciduous-broad leaved macrophanerophyta. There is 26 phaeneropytes(its ratio is 50 0% in total), 11 chamaephytes(21 1%),12 hemicryplophytes(23 1%),3 annoul herbaceous (5 8%), geocryplophytes are zero in biological spectrum of the community.The leaf characteristic is simple leaf, small-sized leaf, complete leaf and grass-leaf in the mixed forest . The stand is 30～40 year-old,its average height is 10 m.Mean diameter at breast height is 15 5 cm,the stand size is 57 m 3/hm 2 by Tilia amurensis,mean diameter at breast height is 22 cm,the stand size is 24 m 3/hm 2 by Quercus mongolica. And the total stand size is 89 5 m 3·hm 2 in the community.

Göran Ståhl - One of the best experts on this subject based on the ideXlab platform.

Andrea Vacca - One of the best experts on this subject based on the ideXlab platform.

  • Short-term impact of Coppice management on soil in a Quercus ilex l. stand of Sardinia
    Land Degradation & Development, 2016
    Co-Authors: Andrea Vacca, Francesco Aru, G. Ollesch
    Abstract:

    The short-term impact of coppice-with-standards management on soil in a Mediterranean holm oak forest was assessed to contribute to address appropriate recommendations to minimize possible negative effects of the silvicultural practices. For this purpose, soil surface features and topsoil properties were investigated in two representative areas located in a public forest in southwest Sardinia (Italy) and coppiced in the periods November 2012–March 2013 and November 2011–March 2012, respectively. Regardless of differences in soils and slope gradient, the same management, in terms of final density of trees standing after the clear-cut and accumulation of Brushwood in strips along the maximum slope gradient, was applied in both areas. Field observations and laboratory data highlighted the disturbances caused to the soil by the silvicultural practices in the stands when compared with the undisturbed stands. These disturbances involved the almost complete removal of organic horizons, with consequent negative impact on organic carbon content, and the activation of erosion processes, mostly related to rainsplash erosion. Although soil mobilization locally largely exceeded the tolerable erosion rates, no extreme rainfall events occurred after the coppicing to produce critical situations at the catchment level. The adjustment of the final density of trees standing after the clear-cut in relation to soil properties, slope gradient and the possibility of extreme rainfall events, a different Brushwood management and the restriction to the passage of wild animals would have strongly reduced the negative impacts on soils. © 2016 The Authors. Land Degradation and Development published by John Wiley & Sons, Ltd.

Joanna Czarnecka - One of the best experts on this subject based on the ideXlab platform.

  • Spatial and temporal variability of seed bank resulting from overgrowing of xerothermic grassland
    Acta Societatis Botanicorum Poloniae, 2011
    Co-Authors: Joanna Czarnecka
    Abstract:

    The aim of my study was to determine changes in the seed bank and vegetation during the process of overgro-wing of the xerothermic grassland situated on the slopes of the White Mountain (349 m a. s. l., the Central Roztocze Region, South-Eastern Poland). I also examined whether the changes of vegetation can be predicted if we know the structure of the burned seed flora. To achieve this goal I used two sets of data: one collected from three different environments (grassland, Brushwood and woodland) at the same time (toposequence), and the other collected twice from the same place at the interval of seven years (chronosequence). I stated that the appearance of even a small number of ornitochorous seeds and their seedlings can be treated as a signal that the bush encroachment will accelerate. Seed number seems to decrease during succession in the analysed sequence of plant communities. The total number of species in the seed bank did not change in the most dynamic plant communities: grassland and Brushwood, and it was significantly higher there than in the seed bank of woodland. During the time of observation, the most important quantitative and qualitative changes took place in grassland vegetation, which is more similar to Brushwood vegetation now than it was at the beginning of the study.

  • Seed dispersal effectiveness in three adjacent plant communities: xerothermic grassland, Brushwood and woodland
    2005
    Co-Authors: Joanna Czarnecka
    Abstract:

    This study investigates the dispersal ability of seeds and fruits of plant species in three adjacent plant communities — xerothermic grassland, Brushwood and woodland — through analysis of the soil seed bank and its changes at the borders of the communities. I tested the following null hypothesis: effective seed dispersal leads to negligible differences in the richness and structure of the seed bank among these plant communities. However, considerable differences, both quantitative and qualitative, were observed among the seed banks of the neighbouring plant communities. I noted the highest average density of seeds, 32 450 per square metre, within the Brushwood, half of that density (14 058) in the grassland seed bank, and less than a tenth of that density (2245) in the woodland bank. Most of the seeds remain in the close vicinity of their parent plants. In the analysed arrangement of plant communities, the most effective methods of seed dispersal seem to be myrmecochoria and endozoochoria. Seeds and fruits of the last type of dispersal are the most abundant in the woodland seed bank, where tree crowns host a lot of birds. Very effective dispersal is also exhibited by Betula pendula, an anemochorous pioneer species, and Hypericum perforatum.

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