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alien tree species in a heterogeneous forest landscape: a spatially realistic simulation model. Landscape Ecol. 23: 787-801. Stypiński P. 1977. Odnawianie się czeremchy amerykańskiej (Padus serotina (Ehrh.) Borkh.) w lasach na Pojezierzu Mazurskim. Sylwan 121(10): 47-57. Thiele J. & Otte A. 2008. Invasion patterns of Heracleum mantegazzianum in Germany on the regional and landscape scales. J. Nat. Conserv. 16(2): 61-71. Thuiller W., Alberta C., Araújob M. B., Berryc P. M., Cabezad M., Guisane A., Hic klerf T., Mid gleyg G. F., Patersonc J., Schurrh F. M., Sykesf M. T

. Studia i Materiały CEPL w Rogowie R. 13, 3(28): 175–180. Gazda, A., Augustynowicz, P. 2012. Obce gatunki drzew w polskich lasach gospodarczych. Co wiemy o puli i o rozmieszczeniu wybranych taksonów? Studia i Materiały CEPL w Rogowie, 33(4): 53–71. Hantz, J. 1979. Rodzaj Oxalis w Polsce. Fragmenta Floristica et Geobotanica, 25: 65–112. Jagodziński, A.M., Dyderski, M. K., Rawlik, M., Banaszczak, P. 2015. Plantation of coniferous trees modifies risk and size of Padus serotina (Ehrh.) Borkh. invasion – Evidence from a Rogów Arboretum case study. Forest Ecology and

Invasive alien plant species of the southern part of the Nowogard Plain (NW Poland)

Investigations on the distribution of selected invasive plant species in southern part of the Nowogard Plain were conducted in the vegetation seasons of years 2008-2010. Field studies were based on the cartogram method. The article shows the distribution of twelve selected invasive plant species: Echinocystis lobata, Heracleum sosnowskyi, Impatiens glandulifera, Impatiens parvifora, Padus serotina, Reynoutria japonica, Robinia pseudacacia, Solidago canadensis, Solidago gigantea, Quercus rubra, Rosa rugosa and Acer negundo in the study area.

Abstract

In recent years, programmes aimed at improving environmental conditions in river valleys within urban spaces have been initiated in many of the European Community countries. An example is the project “Revitalization of Urban River Spaces – REURIS” which was implemented in 2009-2012. Its main aim was to revitalize a part of the valley of the River Ślepiotka in Katowice. One of the tasks of the project was a comprehensive treatment to combat invasive plant species occurring in this area, carried out by using a combination of chemical and mechanical methods. Chemical treatment involved the application of herbicide mixtures, and mechanical treatment included, among others, mowing and/or removal of the undesirable plants. The work focused primarily on reducing the spread of two species of the Impatiens genus: I. glandulifera and I. parviflora, and the species Padus serotina, Reynoutria japonica and Solidago canadensis. Currently, the maintenance works on this section of the river are performed by the Urban Greenery Department in Katowice, which continues the elimination of invasive plants, according to the objectives of the REURIS program. In 2012 the Department of Botany and Nature Protection at the Faculty of Biology and Environmental Protection started to monitor the implementation and the effects of the implemented actions for elimination and participated in the action of removal of selected invasive plant species: Impatiens parviflora and Reynoutria japonica within specific areas. These actions led to a reduction in the area occupied by invasive plants and a weakening of their growth rate and ability to reproduce.

Abstract

The occurrence of mountain plant species in the Polish lowlands has been at the centre of attention of many botanists. In 2008-2011 we carried out field studies aimed at describing a new lowland population of White Twisted-stalk S. amplexifolius discovered in 2008. We focused on the following aims: to determine the current status of the lowland population of S. amplexifolius; to characterize phytocenoses and habitat conditions in which the species occur; to identify factors that can potentially pose a threat on the population and to propose guidelines for its protection. The newly discovered population is located in the Trójca Forest District (50º 38.737’ N; 18º 48.945’ E), forest department 61L. The main part of the population (ca. 70%) occupies an area of approximately 100 m2. Currently, to protect the population from grazing, the whole area (about 0.25 ha) has been surrounded by metal mesh fence. The population occurs within a poorly developed patch of Fraxino- Alnetum. It contains 107 branched and fruiting individuals of S. amplexifolius and 83 smaller plants (branchless and sporadically fruiting). The number of fruits per plant varies between 6 and 20. One fruit contains an average of 5 seeds (a maximum of 12 seeds and a minimum of 3 seeds per fruit). The occurrence of numerous Padus serotina seedlings and young plants is recorded within the site. Human-related factors have caused substantial changes in the water relations and, subsequently, also in the species composition of these plant communities. The population of S. amplexifolius within the described site seems to be in good condition and develops normally.

Abstract

This study presents the species structure of macrofungi in different plant communities formed on fallows as a result of secondary succession. The mycological observations were carried out in 2012 and 2013 in the buffer zones of all landscape parks in the Łódzkie province, i.e. Bolimów LP, Spała LP, Sulejów LP, Warta-Widawka LP, Łódź Hills LP, Przedbórz LP and Załęcze LP. The botanical research identified fallows representing 7 types of plant communities. In total 46 macromycetes species were found on the fallows. The diversity of macrofungi depended on the type of plant community. The highest number of fungi species was found in the communities with an admixture of trees (Pinus sylvestris, Betula pendula), while the lowest was collected on fallows almost completely covered by Cirsium arvense and Solidago canadensis. Considering the trophic classification of macrofungi found on fallows, most species were saprotrophic and mycorrhizal. Wood inhabiting saprotrophs were represented by only two species

Abstract

In Western Pomerania, as in other areas of Europe, alien species play an increasingly important role. In particular, invasive plants tend to spread rapidly and in large numbers which may reduce diversity of native species, leading to the phenomenon of “trivialisation of flora”, and transform ecosystems. The list of invasive species (32 taxa) includes alien species occurring throughout Western Pomerania, and penetrating natural or semi-natural habitats. The second group consists of potentially invasive species (23 taxa), i.e. those distributed across the area under study and tending to increase the number of their localities in semi-natural and natural habitats, taxa invasive only locally, as well as species with missing data, which does not currently allow including them into the first group. Invasive weeds, as well as some epecophytes and archaeophytes occurring only on anthropogenic sites and tending to spread, were not taken into account. Among hemiagriophytes, the most common and troublesome ones are: Conyza canadensis, Erigeron annuus, Lolium multiflorum, Lupinus polyphyllus, Solidago canadensis, S. gigantea. Among holoagriophytes, i.e. the taxa which received the highest naturalisation status, very expansive species, successful in land colonisation, like Acer negundo, Bidens frondosa, B. connata, Clematis vitalba, Elodea canadensis, Epilobium ciliatum, Heracleum sosnowskyi, Impatiens glandulifera, I. parviflora, Padus serotina, Quercus rubra and Robinia pseudoacacia, should be given particular attention. Among the invasive and potentially invasive species, most taxa penetrate plant communities of the Artemisietea and Molinio-Arrhenatheretea class, followed by Querco-Fagetea, Vaccinio-Piceetea, Stellarietea mediae, Salicetea purpurae and Koelerio-Corynophoretea. The number of invasive species is twice as high when compared to the situation of these species in Poland; on the contrary, the number of species inhabiting anthropogenic, semi-natural and natural habitats is two times lower, while that of holoagriophytes and hemiagriophytes is 56.3% and 43.7%, respectively. It seems that in the case of some invasive and potentially invasive species, a decrease in the number of their locations may be observed from the west to the east (e.g. for Acer negundo, Bromus carinatus, Clematis vitalba, Helianthus tuberosus, Lycium barbarum, Reynoutria japonica, Rosa rugosa, Vicia grandiflora). Distribution patterns for some species (e.g. for Parthenocytisus inserta or Xanthium albinum) are indicative of a likely major role of the Odra River valley in the spreading of invasive species. It should be kept in mind that the area of the North-West Poland is poorly examined in terms of its flora, so the results provided in this paper are tentative. Nevertheless, the maps illustrate colonisation trends and directions and, moreover, have been so far the only attempt to synthesise this problem in NW Poland.

(Prunus serotina Ehrh.) na siedliskach borowych [Regeneration of black cherry (Prunus serotina Ehrh.) in coniferous forest communities]. Sylwan 155 (8): 530-534. Halarewicz A. 2011b. Przyczyny i skutki inwazji czeremchy amerykańskiej Prunus serotina w ekosystemach leśnych [The reasons underlying the invasion of forest communities by black cherry, Prunus serotina and its subsequent consequences]. Leśne Prace Badawcze 72 (3): 267-272. Halarewicz A. 2012. Właściwości ekologiczne i skutki rozprzestrzeniania się czeremchy amerykańskiej Padus serotina (Ehrh.) Borkh. w

-Ipoly National Park Directorate, Budapest, Hungary, 75−80. Halarewicz A. 2012. Ecological traits and the consequences of dispersal of black cherry, Padus serotina ( Ehrh.) B orkh. i n s elected f orest p hytocenoses (in Polish with English summary).Wydawnictwo Uniwersytetu Przyrodniczego we Wrocławiu, Wrocław, Poland. Hammer Ø., Harper D.A.T., Ryan P.D. 2001. PAST: Paleontological Statistics software package for education and data analysis. Paleontologia Electronica, 4 (1), 1-9. Husch B. 1954. The regeneration of Prunus serotina in Northwestern Pennsylvania following cutting

, W. 2011. Biological invasions in the Polish national and landscape parks (in Polish with English summary). In: Alien species in the fauna of Poland (eds. Z. Głowaciński, H. Okarma, J. Pawłowski, W. Solarz). Instytut Ochrony Przyrody PAN, Kraków, Poland, 624–639. Namura-Ochalska, A., Borowa, B. 2015. The struggle against black cherry Padus serotina (Ehrh.) Borkh. in the forest division Rózin of the Kampinos National Park. Assessment of the effectiveness of selected methods (in Polish). In: Elimination of invasive alien plant species – good and bad practices (eds