Many ecological studies showed that species density (the number of species per unit area) in nonnative organism groups of the mountain areas decreases with increasing altitude. The aim of the paper is to determine the variability in the incidence of non-native plant species (neophytes) associated with the change in altitude and links of the invading taxons to reference habitat types, as well as their links to three ecologically very similar, however in natural conditions, different areas. In general, the most invaded habitats are those which are highly influenced by human activities. Firstly, data collection was conducted through field mapping of build-up areas in South-western Slovakia. Subsequently, with the assistance of ordination methods, we evaluated the level of association of invasive neophytes according to the set objectives. We found that altitude was an important factor determining variability of invasive neophytes’ occurrence. Total amount of habitats with invasive neophytes’ occurrence showed a linear increase along the altitudinal gradient. Many invasive neophytes adapted to abandoned habitats of upland territory were also able to grow along roads, and vice versa, abandoned and unused habitats of lowland areas created conditions for many typical invasive neophytes occurring along roads and habitats of gardens and yards. Railways of lowland areas provided habitats and means of spread of invasive woody neophytes. Gardens and yards were important sources of alien neophytes in all observed territories. Invasive neophyte Aster novi-belgii can be described as a very variable species tolerant to a wide range of factors limiting the spread of species along the elevation gradient.
Robert Zubel, Barbara Fojcik, Grzegorz Wolski and Aldona Uziębło
, Dicranaceae) na Płaskowyżu Kolbuszowskim (Wyżyna Sandomierska). Fragm. Flor. Geobot. Ser. Polonica 6: 288-290.
Fudali E., Szczepański M., Rusińska A., Rosadziński S., Wolski G. 2009. The current distribution in Poland of some European neophytic bryophytes with supposed invasive tendencies. Acta Soc. Bot. Pol. 78 (1): 73-80.
Lambdon Ph. W. 2009. Species accounts of 100 of the most invasive alien species in E Europe. [In:] DAISIE (Delivering Alien Invasive Species Inventory for Europe), Handbook of Alien Species in Europe. J
Paukova Ž.: Invasive plant species in the three microregions of Nitra region, south-west Slovakia. Ekologia (Bratislava), Vol. 32, No. 2, p. 262-266, 2013. Alien plant species were recorded by field survey in three selected microregions (submontane in district Zlate Moravce, hilly in district Nitra and lowland in districts Nove Zamky) in Nitra region, SW Slovakia in 2011. In the microregions totally 19 invasive neophytes were recorded. The most frequent and abundant species were the following: Ailanthus altissima, Ambrosia artemisiifolia, Conyza canadensis, Fallopia x bohemica, Helianthus tuberosus, Iva xanthiifolia, Negundo aceroides, Robinia pseudoacacia, Solidago canadensis and Stenactis annua. On the basis of the data we can preliminary conclude that the number of species and the number of localities in the southern lowland microregion were almost twice higher than those in the northern hilly region.
Petra Košir, Andraž Čarni, Aleksander Marinšek and Urban Šilc
Ecological gradients along river banks of the Mura River influence forest species composition. On the basis of 58 relevés of floodplain forests along theMura River, the classification of vegetation plots was performed with the Pc-Ord program. The diagnostic species combination for three clusters revealed after classification was calculated by fidelity measure (phi-coefficient) and presented in an analytic table. Average Ellenberg inidicator values, stream distances and relative elevations of the relevés were passively projected onto PCA to show ecological relationships among them. Correlations of plant functional type and stream distance gradients were calculated with regression analysis. For themain edifiers response curves to the stream distance gradients weremade. The classification of the Mura floodplain forests has revealed three ecologically interpretable vegetation types: Salicetum albae (most humid and nutrient-rich sites), Fraxino- -Ulmetum allietosum ursini (ecologically intermediate sites), F.-U. quercetosum robori (the driest and the least nutrient-rich sites). Zonation of vegetation is connected to distance from the closest stream which influences species distribution through ecological gradients of moisture and nutrient. The proportion of therophytes is significantly negatively correlated with the distance from the closest stream and the proportion of neophytes is significantly negatively correlated with distance from the main stream.
Jana Medvecká, Ivan Jarolímek and Mária Zaliberová
Dynamics and Distribution of Neophytes in Ruderal Vegetation of the Horná Orava Region (Northern Slovakia)
Based on research of ruderal vegetation in the Horná Orava region in the 1980s and in 2005-2007, a list of neophytes was compiled. Thirty-three species of neophytes have been found, representing 6% of the overall flora. The geographical origin, family, life-history, life-form and status of invasion of these species were assessed. The biggest proportion of the species was of North American origin (49%), therophytes (49%) and members of the family Asteraceae (38%). Most of the neophytes are garden "escapees" and only few of them may be considered to be of potential hazard to the studied region, most particularly Fallopia japonica, Impatiens glandulifera and Solidago canadensis. Types of plant communities, where particular neophytes were found, and the foci of their distribution were evaluated as well. Neophytes are most abundant in communities of the class Galio-Urticetea, and especially of the alliance Senecionion fluviatilis. Comparing older and present data, trends in the progression of non-indigenous species in the Horná Orava region were predicted. It is apparent that the number of localities of invasive species is increasing and even other species that in the literature from the other regions are mentioned as invasive tend to spread through the area.
Agnieszka Popiela, Andrzej Łysko, Zofia Sotek and Krzysztof Ziarnek
Berg C. & Barth H. 2008. Does the inner Baltic Sea coast provide a habitat for invasive neophytes? In: W. Rabitsch, F. Ess l & F. Klingenstein (eds.). Biological Invasions - from Ecology to Conservation. NEOBIOTA 7: 218-223.
Bettinger A., Buttler K. P., Caspa ri S., Klotz J., May R. & Metzing D. 2013. Verbreitungsatlas der Farn- und Blütenpflanzen Deutschlands. 912 pp. Netzwerk Phytodiversität Deutschlands, Reden, Bonn
Dajdok Z. & Pawlaczyk P. 2009. Inwazyjne gatunki roślin ekosystemów mokradłowych
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.
Alena Rendeková, Karol Mičieta, Zuzana Randáková and Ján Miškovic
. Journal of Applied Ecology 37(5): 845–864.
Marhold, K. 1998: Ferns and flowering plants. In: Marhold, K. & Hindák, F. (eds.): Checklist of non-vascular and vascular plants of Slovakia. Veda, Bratislava, pp. 333–687.
McKinney, M. L. & Lockwood, J. 1999: Biotic homogenization: a few winners replacing many losers in the next mass extinction. Trends in Ecology & Evolution 14: 450–453.
Medvecká, J., Jarolímek, I. & Zaliberová, M. 2009: Dynamics and distribution of neophytes in the Horná Orava Region (North Slovakia). Hacquetia 8(2): 147–158.
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