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PL
W artykule przedstawiono charakterystykę nowego stanowiska Gladiolus imbricatus na terenie rezerwatu florystycznego Biele (Nadbużański Park Krajobrazowy). Stanowisko położone w prześwietlonym lesie łęgowym (Fraxino-Alnetum) liczy 112 okazów generatywnych i należy do najbogatszych w regionie. Zaproponowano aktywną ochronę gatunku polegającą na ograniczaniu rozwoju warstwy krzewów
EN
Gladiolus imbricatus is a strictly protected species in Poland. It is considered to be critically endangered in the Nizina Południowopodlaska Lowland. The main reason of extinction of the species in the region is decrease in water table, athropopressure (frequent mowing, application of a large doses of fertilizers) and on the other hand a secondary succession due to cessation of meadow exploitation. The station of G. imbricatus in the same forest complex, recorded in the early 70’s of XX century, was not confirmed at present. In July 2007 a new site of G. imbricatus was found in a forest clearing in Biele nature reserve (the Nadbużański Landscape Park). The site is situated about 1 km south-east from Noski village, in the eastern part of the reserve (ATPOL square FC74). The stand consists of 112 flowering specimens. The plant community accompanying the species is dominated by meadow species of Molinion alliance (e.g. Lysimachia vulgaris, Filipendula ulmaria, Ranunculus repens, Galium uliginosum, Stachys palustris, Lychnis flos-cuculi, Myosotis palustris), forest plants of Fagetalia sylvaticae order (e.g. Stachys sylvatica, Stellaria nemorum, Impatiens noli-tangere, Festuca gigantea, Scrophularia nodosa, Dryopteris filix-mas, Milium effusum) and species from Glechometalia hederaceae order (e.g. Glechoma hederacea, Galium aparine, Anthriscus sylvestris, Geranium robertianum, Urtica dioica, Geum urbanum). Active protection of G. imbricatus by reduction of shrub development is suggested
PL
Dwa nowe stanowiska mieczyka dachówkowatego Gladiolus imbricatus L. odkryto w okolicach Radomia: na wilgotnej łące (zbiorowisko Holcus lanatus-Polygonum bistorta ze związku Calthion palustris) koło Janiszewa oraz na łące ziołoroślowej (zespół Geranio-Filipenduletum ze związku Filipendulo-Petasition) w sąsiedztwie miejscowości Trablice. Zachowanie populacji mieczyka dachówkowatego wymaga aktywnej ochrony jego siedlisk poprzez regularne koszenie i usuwanie podrostu drzew i krzewów.
EN
Gladiolus occurs at dispersed localities of the Polish lowland, and much more often at lower altitudes in mountains and on southern highlands. Recently, two new localities of this species were discovered near Radom, in the valleys of little creeks. One of them is located near the village of Janiszew, in wet meadow (the Holcus lanatus-Polygonum bistorta community, the Calthion palustris alliance). The other one is located near the village of Trablice in the tall herb meadow (the Geranio-Filipenduletum association, the Filipendulo-Petasition alliance). The preservation of the Gladiolus' population within the said localities requires active protection by regular, late mowing and inhibition of the succession by cutting the trees and bushes.
EN
Molinietum caeruleae meadows belong to the most endangered plant communities in Central Europe, nowadays suffering due to the lack of management. The land abandonment promotes strong secondary expansion of macroforbs, sedges or willows, contributing to decrease of the species diversity. In light of these findings very interesting seems to be the evaluation of the variability of features of populations of rare meadow species. In Poland one of strictly protected plant is Gladiolus imbricatus L. It is a tuberous, clonal plant with sword-like leaves and tall stalks bearing purple flowers collected in one-sided inflorescence. The studies of spatio-temporal variability of selected features of subpopoulations of Gladiolus imbricatus were carried out in the years 2009-2011 in Kraków-Kostrze (Southern Poland) in patches of Molinietum caeruleae with different species composition. In Patch I chiefly occurred small meadow species, Patch II was prevailed by shrub willow, Patch III was dominated by tall-growing macroforbs, Patch IV was characterized by substantial share of large-tussock grasses, while Patch V was overgrown by tall rhizomatous grass Phragmites communis. The plant canopy height and ground moisture raised from Patch I, via Patches II, III and IV, to Patch V. Moreover, in all sites the above mentioned parameters increased moderately in consecutive seasons. The decline of abundance of subpopulations observed in the consecutive years and in the successive patches might be caused by a mortality of individuals, a physical damage of tubers, as well as a prolonged dormancy of genets. The structure of developmental stages were similar in consecutive years but differed significantly among Patches. The increasing trend toward senility noted in successive sites could be an effect of lack of microsites suitable for seedling recruitment or absence of vegetative regeneration. The dimensions of leaf blades, flowering stalks and inflorescences remained similar in the subsequent seasons, but they augmented significantly in the successive patches. The length and the width of capsules did not change significantly between seasons and sites. Concluding, it might be assumed, that the perspectives for survivability of subpopulations diminish gradually from Patch I, via Patches II, III and IV to Patch V. Simultaneously, it should be pointed out that prospects for persistence in each place steadily decrease in effect of continuous deterioration of site conditions.
EN
The seed size is considered as a key feature, which effects both: colonizing and competitive abilities of species. The disturbance dependent small-seeded taxa are regarded as superior colonists, whereas the large-seeded taxa are considered as best competitors able to survive the competition from adjacent plants and negative effect of litter. The impact of character of standing vegetation, disturbance level and size of gaps on spontaneous recruitment of seedlings of selected light-seeded species (Gentiana pneumonanthe L., Dianthus superbus L.) and heavy-seeded taxa (Serratula tinctoria L., Gladiolus imbricatus L.) were conducted. The investigations were carried out in two areas (A and B). Both of them were consisted of three adjacent patches of Molinietum caeruleae: dominated by small meadow species (labeled MC), prevailed by large-tussocks grasses (labeled GR), and overgrown by willows (labeled SA). In the year 2007, in all patches, ten permanent experimental plots were randomly arranged. In Area A, plots were divided in four square-shaped, neighboring subplots subjected to: no treatment; the removal of litter and moss layers; the removal of litter, bryophytes, and above-ground parts of plants; the removal of litter, moss and the plants, as well as top soil stripping. In the Area B, plots were divided into four subplots measuring from 0.16 m2 to 0.01 m2. In each of them the litter and above-ground part of plant biomass were clipped and removed. The recruitment of seedlings was monitored from 2007 through 2010. In both studied areas, regardless of seed mass, the greatest abundance of seedlings were found in patches MC, and decreased gradually in sites GR and SA. Irrespective of seed size, in subplots where plant cover and litter stayed intact no new genets was noted, moderate appearance of seedlings was observed in subplots without plant necromass, whereas the greatest number of generative progeny was found in subplots without necromass and aboveground parts of plants. The lower abundance of seedlings in subplots without litter, plants and topsoil might have been caused by depletion of seed bank reserves. Moreover, in all patches the number of seedlings of small- and large-seeded taxa increased significantly with augmentation of gap size. In light of performed studies it might be concluded, that the disturbances might play very important role in active protection of studied taxa. The positive impact of disruption diminishes with increasing of plant canopy height. The removal of plant cover and litter contributes to the greatest seedling recruitment but its beneficial effect diminishes with decreasing of opening size.
EN
Molinietum caeruleae meadows belong to the most endangered plant communities in Central Europe, nowadays suffering due to the lack of management. The land abandonment promotes strong secondary expansion of macroforbs, sedges or willows, contributing to decrease of the species diversity. In light of these findings very interesting seems to be the evaluation of the variability of features of populations of rare meadow species. In Poland one of strictly protected plant is Gladiolus imbricatus L. It is a tuberous, clonal plant with sword-like leaves and tall stalks bearing purple flowers collected in one-sided inflorescence. The studies of spatio-temporal variability of selected features of subpopoulations of Gladiolus imbricatus were carried out in the years 2009-2011 in Kraków-Kostrze (Southern Poland) in patches of Molinietum caeruleae with different species composition. In Patch I chiefly occurred small meadow species, Patch II was prevailed by shrub willow, Patch III was dominated by tallgrowing macroforbs, Patch IV was characterized by substantial share of large-tussock grasses, while Patch V was overgrown by tall rhizomatous grass Phragmites communis. The plant canopy height and ground moisture raised from Patch I, via Patches II, III and IV, to Patch V. Moreover, in all sites the above mentioned parameters increased moderately in consecutive seasons. The decline of abundance of subpopulations observed in the consecutive years and in the successive patches might be caused by a mortality of individuals, a physical damage of tubers, as well as a prolonged dormancy of genets. The structure of developmental stages were similar in consecutive years but differed significantly among Patches. The increasing trend toward senility noted in successive sites could be an effect of lack of microsites suitable for seedling recruitment or absence of vegetative regeneration. The dimensions of leaf blades, flowering stalks and inflorescences remained similar in the subsequent seasons, but they augmented significantly in the successive patches. The length and the width of capsules did not change significantly between seasons and sites. Concluding, it might be assumed, that the perspectives for survivability of subpopulations diminish gradually from Patch I, via Patches II, III and IV to Patch V. Simultaneously, it should be pointed out that prospects for persistence in each place steadily decrease in effect of continuous deterioration of site conditions.
PL
Rekrutację siewek pełnika europejskiego Trollius europaeus, goździka pysznego Dianthus superbus, kosaćca syberyjskiego Iris sibirica, mieczyka dachówkowatego Gladiolus imbricatus i goryczki wąskolistnej Gentiana pneumonanthe badano w płatach łąk trzęślicowych Molinietum caeruleae zdominowanych przez różne gatunki. Najwięcej siewek stwierdzono w płatach cechujących się przewagą roślin o niskich pędach i delikatnych organach podziemnych, natomiast znacznie mniej osobników odnotowano na powierzchniach zdominowanych przez krzewiaste gatunki wierzb i wysokokępowe trawy. We wszystkich płatach rekrutacja wystąpiła jedynie na subpoletkach eksperymentalnych powstałych przez usunięcie roślin i ściółki. Luki były głównie kolonizowane przez siewki goździka pysznego i pełnika europejskiego, a najrzadziej zasiedlały je osobniki mieczyka dachówkowatego. Zaprezentowane obserwacje dowodzą, że usuwanie roślin i ściółki w zarastających obecnie płatach wilgotnych łąk trzęślicowych umożliwia rekrutację ustępujących gatunków i przedłuża trwanie ich populacji w zasiedlonym miejscu
EN
The paper reports results of the investigations carried out in two areas (A and B) in Kraków – Kostrze (S Poland). In each of them occurred rare species i.e. siberian iris Iris sibirica, globeflower Trollius europaeus, gentian marsh Gentiana pneumonanthe, meadow gladiolus Gladiolus imbricatus, superb pink Dianthus superbus, western marsch orchid Dactylorhiza majalis, marsch helleborine Epipactis palustris and fragrant orchid Gymnadenia conopsea. Over the both areas three patches with different dominant species were distinguished: patch I – with species creating short stems and delicate underground organs (i.e. Lathyrus pratensis, Lotus corniculatus, Lychnis flos-cuculi, Succisa pratensis, Ranunculus acer), patch II – with willows Salix repens subsp. rosmarinifolia and S. cinerea, patch III – with large tussock grasses, i.e. Molinia caerulea and Deschampsia cespitosa. In each of them were marked 10 plots consisted of control subplot left untouched and experimental subplot, where plants were cut and litter were removed. The seedling recruitment was observed only in experimental plots; in gaps established seedlings of siberian iris, globeflower, gentian marsh, superb pink and meadow gladiolus. The most abundantly represented were the seedlings of globeflower and superb pink. The greatest number of juvenile individuals was observed in patch I, much lower was noted in patches II and III. Presented observations showed that gaps in vegetation cover and litter are safe sites for recruitment of several endangered species and endure the persistence of their populations in occupied site
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