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Invasive plant species - threat to grasslands in river valleys

100%

Szymura M., Dradrach A., Wolski K., Swierszcz S.

Steciana

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2014

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tom 18

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nr 2

River valleys are areas of transition between aquatic and terrestrial communities, with complex biological structure. As ecotones they have high biodiversity as a result of the occurrence of species with different requirements according to soil moisture. They create ecological corridors, allowing migration of the organisms in human disturbed landscape. With these migration routes, species of foreign origin which spread to a new area also benefit. Numerous alien species are considered as invasive, and described as a threat to biodiversity due to strong competitive abilities. To describe the relationships between a number of invasive species, biodiversity and size of a river, the vegetation of 750 m fragments of the Odra and Dobra river valleys on the area of the Wrocław city were analysed. The comparison of plant communities in the valley of a large, managed river (Odra) and its small tributary (Dobra) was carried out. The plant assemblages, occurring in study areas, determined the habitat conditions on the basis of Ellenberg’s indicator values (EIV’s), as well as Shannon-Wiener biodiversity index was defined. The designed sites differed according to Shannon-Wiener biodiversity index, as well as soil properties: moisture, reaction, and fertility. In the study side of the Odra river ruderal and scrub species were dominated, whereas in case of study site of the Dobra river – meadows and ruderal species. The invasive plant species occurring in the Odra valley are: Symphoricarpos albus, Solidago gigantea, S. canadensis, Robinia pseudoacacia, Clematis vitalba, Quercus rubra, Reynoutria japonica, Parthenocissus inserta and Echinocystis lobata, and in the Dobra valley: Solidago gigantea, S. canadensis. The analysis of correlation between Shannon-Wiener biodiversity index and share of invasive species revealed statistically significant influence of occurrence of invasive species on biodiversity of plant communities in case of the Odra river.

2

Nitrogen deposition influences the allelopathic effect of an invasive plant on the reproduction of a native plant: Solidago canadensis versus Pterocypsela laciniata

100%

Wang C., Liu J., Xiao H., Zhou J., Du D.

Polish Journal of Ecology

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2017

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tom 65

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nr 1

This study aims to gain insights into the allelopathic effects (by using leaf extracts) of the notorious invasive Solidago canadensis L. on seed germination of the associated Pterocypsela laciniata (Houtt.) C. Shih under different nitrogen (N) forms added: inorganic (NO3--N and NH4 -N), organic (urea-N), and mixed N (a mixture of the three N forms at 1:1:1 ratio). Among the two used concentrations of S. canadensis leaf extracts the higher exhibited inhibitory allelopathic effects on seedling height and biomass, germination potential, germination index, and vigor index of P. laciniata. N demonstrated positive effects on seed germination of P. laciniata. The effects of mixed and organic N on the seedling biomass of P. laciniata were more pronounced than those of inorganic N and control treatment. The vigor index of P. laciniata under mixed N was significantly higher than those under single N form and control treatment. Thus, organic and mixed N showed higher ecological effects on seed germination of P. laciniata than inorganic and single N form. All N forms could alleviate the inhibitory allelopathic effects of S. canadensis on seed germination of P. laciniata. Overall, the inhibitory allelopathic impact of S. canadensis on seed germination of native species may be attenuated under increased and diverse N deposition, thus it could prevent its further invasion.

3

Preliminary field studies on survival rate of seeds of invasive terophyte Impatiens glandulifera Royle (Balsaminaceae)

100%

Janczak B.

Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana

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2013

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tom 17

4

Spontaneous occurrence of Cotoneaster lucidus Schltdl. in the town of Augustow (NE Poland)

100%

Pliszko A.

Steciana

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2014

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tom 18

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nr 1

Cotoneaster lucidus Schltdl., a potentially invasive alien plant in Poland, is reported from the town of Augustów for the first time (the ATPOL square: FB39). This is the second record of the species occurrence in north-eastern Poland. A new spontaneous population consists of 36 individual shrubs (groups of stems) dispersed on an area of about 0.2 ha, except one dense clump occupying an area of about 20 m². Phytosociological characteristics of the habitat is provided, and the potential threats are discussed.

5

Prunus serotina [Ehrh] - new food resource for polyphagous Lepidoptera

100%

Nowakowska K. M., Halarewicz A.

Electronic Journal of Polish Agricultural Universities. Series Biology

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2006

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tom 09

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nr 1

Observations carried out in south-western Poland revealed that Prunus serotina (Ehrh), invasive plant species new to Poland, became a suitable food source for 10 polyphagous lepidopteran species, including one protected species: scarce swallowtail, Iphiclides podalirius L.

6

Relation between invasive plant and species richness of forest floor vegetation: a study of Impatiens parviflora DC.

100%

Chmura D., Sierka E.

Polish Journal of Ecology

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2006

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tom 54

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nr 3

In 13 forest reserves situated in southern Poland, 68 study plots were established in two regions: the Jurrasic Upland and the Silesian Upland. In these plots, size 10 m × 10 m divided into 100 subplots 1m² each and randomly placed in various forest communities, percentage cover of all species in ground layer was recorded. Relationships between highly invasive alien plant species, Asiatic small balsam Impatiens parviflora DC., and indigenous species, was estimated using various indexes of species richness and diversity. They were: Hill’s numbers (N₀, N₁, N₂), ShannonWiener’s index at the level of a subplot, alpha diversity (species richness within sites), and beta diversity (species richness among sites) at level of a study plot. The subplots with a presence of I. parviflora were compared with those where only native resident species occurred. The study has shown that subplots with the occurrence of I. parviflora are characterized by higher species richness and diversity of native plants independently on vegetation type. The frequency of I. parviflora was negatively correlated with beta diversity of study plots but there was no association with values of alpha diversity. In oak forest, alder carrs and floodplain forests the negative correlation between percent cover of I. parviflora and species richness, as well as cover of the herb layer was observed. The percent cover of I. parviflora was positively correlated with number of native species in beech forest and with their total cover in mixed coniferous forests. However, in natural well-preserved forest phytocoenoses I. parviflora avoids patches characterized by high cover of ground layer species and colonizes empty sites as an additional element of a community.

7

Spread of alien Impatiens glandulifera along rivers invaded at different times

84%

Malikova L., Prach K.

International Journal of Ecohydrology and Hydrobiology

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2010

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tom 10

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nr 1

Invasion of Impatiens glandulifera was reconstructed along rivers in the Czech Republic, central Europe, based on floristic records. The occurrence was assessed along river banks, outside the river banks, and along tributaries downstream from the first records of the species in 1902, 1903, 1978 and 1995, respectively. The following main results were obtained: (a) The species nowadays occupies 77% of the river length in the country. (b) The rivers, investigated in detail, did not differ in the occurrence of the species along the river banks. (c) There were some significant relationships between the penetration of I. glandulifera far from the river banks both in terms of the lateral dimension in the main valley, and upstream along the tributaries, and the time of the first occurrence of the species on the river. (d) It took approximately 20 years from the first occurrence on the main river and the start of spread along the tributaries. The process of invasion is still in progress after about one century and further spread is expected.

8

An assessment of the Ambrosia L. pollen threat at a regional scale using the example of the town of Sosnowiec (Silesian Uplands, Poland)

84%

Chlopek K., Dabrowska-Zapart K., Tokarska-Guzik B.

Acta Agrobotanica

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2011

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tom 64

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nr 2

The investigation of Ambrosia pollen counts in the air of Sosnowiec was carried out from 1998 to 2010 by means of the volumetric method. The pollen season which was determined by means of the 98% method started at the end of July and the beginning of August and lasted until the end of October. The highest Ambrosia pollen count was recorded in 1999 (222 grains x m-3) and the lowest in 2001 (18 grains x m-3). It was stated that the daily count of pollen grains depended on the wind direction and maximum air temperature. The strongest correlations were found with maximum temperature and with a wind direction from the south east. A high negative correlation coefficient was found between the frequency of inflows of air masses from the west and the annual total of pollen grains and the value of the maximum daily count. The closest sites of Ambrosia L. are at a distance of 25–40 kilometres from the sampling point. Significant correlations with the frequency of inflow of air masses can support the conclusion that Ambrosia pollen grains recorded in Sosnowiec were most probably carried not only from local sources but also, at least in part, from distant places.

9

Ergasiophytes of the Ukrainian flora

84%

Protopopova V. V., Shevera M. V.

Biodiversity: Research and Conservation

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2014

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tom 35

10

The spread of Impatiens parviflora DC. in Central European oak forests - another stage of invasion?

84%

Reczynska K., Swierkosz K., Dajdok Z.

Acta Societatis Botanicorum Poloniae

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2015

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tom 84

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nr 4

In this study, we examine the pattern of occurrence of Impatiens parviflora in Central European oak forests over time and its ecological requirements within these types of communities. Research was based on phytosociological data collected in 3776 relevés. A modified TWINSPAN algorithm were used to distinguish the groups of oak forests. The ecological preferences of the I. parviflora and studied communities as well as differences between invaded and non-invaded vegetation plots were analyzed using mean weighted Ellenberg indicator values (EIVs). Finally, both the temporal pattern of I. parviflora participation and changes in its coverage in the studied communities were analyzed. Our study confirmed a high adaptability of this species with respect to temperature, moisture, soil reaction and nutrients and determined its broad ecological optimum in oak forests. However, it also revealed both a greater sensitivity of some communities within Central European oak forests to the invasion of I. parviflora and differences in habitat conditions between invaded and non-invaded vegetation plots. This suggests that the habitat niche of I. parviflora within oak forests is not accidental. The analysis of temporal changes in the frequency of I. parviflora confirmed a 20% increase in relevés over the last 50 years. However, we did not identify any statistically significant rise in the coverage of I. parviflora in oak forests specifically during the studied period.

11

Preliminary observations of the beneficial insect fauna on bracken fern Pteridium aquilinum [L.] Kuhn.

84%

Halarewicz A.

Electronic Journal of Polish Agricultural Universities. Series Biology

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2008

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tom 11

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nr 4

12

Introducing new species and cultivars according to climate, demographic and economic changes in Poland - horticultural view

84%

Infrastruktura i Ekologia Terenów Wiejskich

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2015

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nr III/2

13

Black cherry (Prunus serotina) invasion in a Scots pine forest: relationships between soil properties and vegetation

84%

Halarewicz A., Pruchniewicz D., Kawalko D.

Polish Journal of Ecology

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2017

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tom 65

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nr 2

Prunus serotina Ehrh. is a rapidly expanding invasive in European temperate forests, threatening native species biodiversity. Three alternative models, ‘the passenger’, ‘the driver’, and ‘the opportunist’ were used to determine the interactions between the invasive species, the native community, and features of the habitat. To assess the relationships between soil properties and species composition of a Scots pine forest invaded by P. serotina, we randomly selected twelve research plots in each of four stands in the south-western part of Poland. We used the phytosociological relevé method and determined selected soil properties (total nitrogen, organic carbon, and pH value) in the organic and humus horizons. Based on redundancy analysis, we determined that selected soil properties explained 38% of the total variation in species composition of the Scots pine forest with P. serotina, indicating that community interactions followed the ‘passenger’ model. At the same time, we found that P. serotina invaded via the ‘driver’ model, since the decrease in soil C:N ratio correlated with black cherry presence, and showed a significant impact on the floristic diversity in the invaded phytocenoses. We conclude that soil parameters seem to facilitate the invasion of P. serotina, and comprise the consequences of this process.

14

Impact of invasive Aster lanceolatus populations on soil and flora in urban sites

84%

Obratov-Petkovic D., Bjedov I., Nesic M., Belanovic Simic S., Dunisijevic-Bojovic D., Skocajic D.

Polish Journal of Ecology

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2016

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tom 64

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nr 2

Invasive plants are one of the major treat to local communities and ecosystems in urban habitats. Aster lanceolatus Willd. is one of the most spreading invasive plant species in Serbia and to examine its impact on soil, flora and aboveground biomass in urban habitats we investigated the pH, electrical conductivity and concentration of trace elements (Zn, Cu, Ni, Mn) in four invaded and four uninvaded plots in urban habitats. We also studied floristic composition and floristic richness regarding these invasive plant populations. These parameters were assessed along transects arranged in the cross shape, running from the centre of the invaded area towards the peripheral uninvaded area. Trace elements were analysed using atomic absorption spectrophotometer. Statistical differences were analysed using ANOVA and post-hoc LSD-tests. The results showed an important decrease of the number of species and herbaceous cover under A. lanceolatus populations. There were no statistically significant differences between invaded and uninvaded patches when soil pH and electrical conductivity were considered. The concentration of Zn, Mn and Ni in the soil was higher in invaded areas. The content of Zn in aboveground biomass collected from invaded compare to uninvaded areas was higher. This study raises the possibility that invasive species changes soil characteristics and create conditions for their spreading.

15

Soil preferences and morphological diversity of goldenrods (Solidago L.) from south-western Poland

84%

Szymura M., Szymura T. H.

Acta Societatis Botanicorum Poloniae

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2013

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tom 82

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nr 2

16

New stand of invasive neophyte Ambrosia artemisiifolia L. and its potential reproduction

84%

Csontos P., Angyal Z., Chmura D., Nagy J., Halbritter A., Tamas J.

Polish Journal of Ecology

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2015

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tom 63

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nr 3

A new stand, formed by some fifty individuals of Ambrosia artemisiifolia L., an invasive plant of alien origin, was discovered at the Katowice railway station (southern Poland), in 2011. Two years later, the stand (increased to more than 160 individuals in the meantime) was re-visited, phytosociological survey was made, and four soil cores (5 cm deep and 80 cm² surface area, each) were taken for seed bank studies. The phytosociological sampling revealed 28 co-occurring vascular species, most of them representing hemicryptophyte and geophyte life forms. According to Ellenberg's values, the species pool indicated sunny (L7 and L8 species dominating) and semi-dry (mainly F4 species) habitat for the common ragweed population, whereas Zarzycki's soil granulometric data reflected coarse-grained soil. Albedo of the soil was lower than that of the vegetation thus sparsely vegetated sites were considered as heat accumulating microhabitats that might support establishment of the thermophilic A. artemisiifolia. During soil seed bank analysis a high number of naturally opened fruits (dehiscent achenes) were found (718.75 per m²) most probably indicating frequent germination in previous years. Greenhouse germination tests proved successful germination of 125 individuals per m², which was considered enough to maintain the A. artemisiifolia stand at the station. The results call attention to a newly discovered, established population with increasing demography of A. artemisiifolia, a highly allergenic introduced weed of Poland.

17

The occurrence of alien species in the settlement areas of the Kampinos National Park and its vicinity (Central Poland)

84%

Kirpluk I., Bomanowska A.

Biodiversity: Research and Conservation

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2015

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tom 39

18

Heavy metals content in the Fallopia genus in Central European Cities - study from Wroclaw and Prague

84%

Soltysiak J., Berchova-Bimova K., Vach M., Brej T.

Acta Botanica Silesiaca

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2011

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tom 07

In this study highly invasive plant species from the Fallopia genus (Fallopia japonica and Fallopia ×bohemica) were investigated for their ability to accumulate heavy metals. Samples were collected from two large cities: Wroclaw and Prague. The content of Cr, Cd, Fe, Pb and Zn in soils covered by Knotweed taxa was determined. Afterwards, plant samples were collected from the places where the largest amounts of toxic metals were found. Rhizomes, roots and leaves of chosen samples of both Fallopia taxa have been treated separately, as different parts of the plant accumulate metals. The investigation has shown that in urban conditions Knotweed taxa spread on soils with higher than natural concentration of toxic metals. Only the chromium amount was similar to the normal range. In both species heavy metals were accumulated mainly in roots and rhizomes, but their concentration was significantly higher in Fallopia japonica underground parts than in the hybrid. There were no differences between species with metals content in the aboveground parts of the plant body. The results suggest that special attention should be paid to Cr. In all analyzed plants, high chromium content was found, while the Cr amount in soils samples was close to natural.

19

Coleoptera found on neophyte Prunus serotina [Ehrh.] within forest community and open habitat

84%

Nowakowska K. M., Halarewicz A.

Electronic Journal of Polish Agricultural Universities. Series Biology

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2006

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tom 09

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nr 1

Black cherry, Prunus serotina (Ehrh) is one of the invasive plant species that, for its ability to negatively affect local plant communities, may deserve particular attention and control measures. The authors present species composition of Coleoptera found on P.serotina in two habitats in SW part of Poland. It is the first record of this kind from Poland.

20

Utilization of the invasive plant Impatiens parviflora DC. by the snail Columella edentula Draparnaud in oak-hornbeam forests

84%

Piskorz R., Urbanska M.

Acta Societatis Botanicorum Poloniae

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2007

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tom 76

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nr 1

This study investigated the extend to which the snail Columella edentula is more strongly associated with the small balsam Impatiens parviflora than with other plants in the herb layer of an oak-hornbeam forest, and to interpret the character of the interaction Impatiens parviflora - Columella edentula. Numbers of C. edentula and rates of colonization were compared on various plant species under natural and laboratory conditions. Seasonal variation in snail abundance on I. parviflora was observed on permanent plots. The leaf injuries caused by C. edentula were localized in respect of the morphological and anatomical structure of leaves. The results show that I. parviflora is one of the plant species of the herb layer that are most abundantly colonized by this snail in oak-hornbeam forest. Snail finds a plant particularly suitable as a place for resting. The most favoured attachment site is on the underside of the leaf, along the midrib, which provides the highest and relatively stable humidity, as well as protection from direct sunlight and predators. I. parviflora is also a food for the snails, but they do not eat these fragments of leaves where calcium carbonate is accumulated.

Ograniczanie wyników

Invasive plant species - threat to grasslands in river valleys

Nitrogen deposition influences the allelopathic effect of an invasive plant on the reproduction of a native plant: Solidago canadensis versus Pterocypsela laciniata

Preliminary field studies on survival rate of seeds of invasive terophyte Impatiens glandulifera Royle (Balsaminaceae)

Spontaneous occurrence of Cotoneaster lucidus Schltdl. in the town of Augustow (NE Poland)

Prunus serotina [Ehrh] - new food resource for polyphagous Lepidoptera

Relation between invasive plant and species richness of forest floor vegetation: a study of Impatiens parviflora DC.

Spread of alien Impatiens glandulifera along rivers invaded at different times

An assessment of the Ambrosia L. pollen threat at a regional scale using the example of the town of Sosnowiec (Silesian Uplands, Poland)

Ergasiophytes of the Ukrainian flora

The spread of Impatiens parviflora DC. in Central European oak forests - another stage of invasion?

Preliminary observations of the beneficial insect fauna on bracken fern Pteridium aquilinum [L.] Kuhn.

Introducing new species and cultivars according to climate, demographic and economic changes in Poland - horticultural view

Black cherry (Prunus serotina) invasion in a Scots pine forest: relationships between soil properties and vegetation

Impact of invasive Aster lanceolatus populations on soil and flora in urban sites

Soil preferences and morphological diversity of goldenrods (Solidago L.) from south-western Poland

New stand of invasive neophyte Ambrosia artemisiifolia L. and its potential reproduction

The occurrence of alien species in the settlement areas of the Kampinos National Park and its vicinity (Central Poland)

Heavy metals content in the Fallopia genus in Central European Cities - study from Wroclaw and Prague

Coleoptera found on neophyte Prunus serotina [Ehrh.] within forest community and open habitat

Utilization of the invasive plant Impatiens parviflora DC. by the snail Columella edentula Draparnaud in oak-hornbeam forests