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Chrząszcze (Coleoptera) Wielkopolskiego Parku Narodowego., Część 1., Chrząszcze saproksyliczne nowe dla Parku oraz uwagi o ich biologii i ekologii
Glebowy bank nasion zbiorowisk leśnych Wielkopolskiego Parku Narodowego – badania wstępne
The aim of this study is to examine the soil seed banks of the following plant communities: the complex of lakeside plant communities (Carici elongate-Alnetum, Fraxino-Alnetum); the Central European oak-hornbeam forest (Galio sylvatici-Carpinetum); the thermophilous oak forest (Potentillo albae-Quercetum), in the course of transformation into the oak-hornbeam forest; the fresh coniferous mixed forest (Querco roboris-Pinetum) and the subcontinental pine forest (Leucobryo-Pinetum). All of these plant communities are located in protected areas of the Wielkopolska National Park. The soil seed banks of an individual communities are compared according to the species richness and species diversity as well as species similarity between the herb-layer and the seed bank. The soil seed banks are mainly composed of autochthonous species. The studied communities differ in size and species richness of the soil seed bank as well as in its species diversity. The indicated parameters decrease along with the decrease in the fertility and humidity of the communities. A statistically significant, moderate, positive correlation of species richness between the herb layer and the soil seed bank is observed. Nevertheless, the species similarity between the herb layer and the seed bank is relatively low, which can be attributed to the following: 1) the dominance of single species is greater in soil seed banks than in herb layer; 2) woody species whose seedlings were not recorded in the herb layer or were recorded very rarely, have a large share in seed banks; 3) seeds of some clonal plants were not recorded in seed banks as these species invest only small resources in generative reproduction.
Nowe stanowiska roślin naczyniowych Polski, 6
W pracy przedstawiono nowe stanowiska 25 rzadkich (lub regionalnie rzadkich) roślin naczyniowych w Polsce, tj. Allium angulosum, Asclepias syriaca, Bromus sterilis, Carex davalliana, Claytonia perfoliata, Dactylorhiza incarnata subsp. incarnata, Erechtites hieraciifolius, Euthamia graminifolia (Solidago graminifolia), Festuca myuros (Vulpia myuros), Gentiana cruciata, Gentiana pneumonanthe, Gypsophila paniculata, Lithospermum officinale, Najas marina, Pilosella aurantiaca (Hieracium aurantiacum), Pistia stratiotes, Scutellaria altissima, Senecio inaequidens, Silene coronaria (Lychnis coronaria), Stachys annua, Stellaria pallida, Typha shuttleworthii, Valeriana locusta (Valerianella locusta), Xanthium orientale (Xanthium albinum) oraz Zannichellia palustris.
Nowe stanowiska roślin naczyniowych Polski, 5
W pracy przedstawiono nowe stanowiska 18 rzadkich (lub regionalnie rzadkich) roślin naczyniowych w Polsce, tj. <i>Abutilon theophrasti, Aquilegia vulgaris, Carex bohemica, C. tomentosa, Crocus speciosus, Erechtites hieraciifolia, Lathyrus nissolia, Lunaria annua subsp. annua, Lycopodiella inundata, Myricaria germanica, Nymphaea candida, Ophioglossum vulgatum, Potentilla indica, Pulicaria dysenterica, Rubus kaznowskii, Scilla sardensis, Solidago ×niederederi</i> oraz <i>Veratrum lobelianum</i>.
Is the flora of wildlife food plots similar to that of agricultural fields, or does it have its own specificity?
Naturalization of the Ornamental Plant Crocus tommasinianus Herb. (Iridaceae) in Forest Ecosystems: A Case Study from Poland
Highlights: Though not highly invasive, bulb and corm ornamental plants can escape cultivation and naturalize in new areas. Studying their naturalization is key to understanding their ecological impact and managing biodiversity. Objectives: This study aimed to document the first naturalization case of Crocus tommasinianus Herb. in Poland and assess the morphological variability of the naturalized population under different environmental conditions. Another objective was to identify diagnostic features in seed testa ornamentation to distinguish C. tommasinianus from related species (C. vernus (L.) Hill. and C. scepusiensis (Rehmann et Wol.) Borbás ex Kulcz.). Methods: The morphometric studies were performed within four subpopulations of C. tommasinianus differing in environmental conditions, determined with Ellenberg indices. Multivariate tests, ANOVA, and post-hoc tests were used to determine the morphometric diversity of specimens and to relate them to environmental factors. Seed micro-ornamentation was examined using a scanning electron microscope. Results: Light and temperature were negatively correlated, while moisture, soil pH, and nitrogen were positively correlated with many morphological traits. Plants spreading into forest ecosystems exhibited better-developed features (larger leaves and flowers) than those in former cultivation sites, indicating higher survival potential. The seed coat is papillate, with distinct differences in the shape, size, and secondary sculpture of the papillae compared to C. vernus and C. scepusiensis. Given that floristic studies often occur during the fruiting period of crocuses, testa ornamentation is crucial for identifying the studied species. Conclusions: The observed naturalization of C. tommasinianus demonstrates the high morphological plasticity of plants, which makes them capable of colonizing new areas, including forest habitats.