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EN
Symptoms of anthropogenic changes in the vascular plant flora include the spread of some species groups and the extinction of others. Also habitat condition changes (eutrophication, pollution etc.) and biodiversity loss (at a regional, national and even continental scale) should be mentioned. Numerous papers with rare plant species localities and endangered habitats have been published but the extinction processes and scale of this phenomenon in urban areas where environmental conservation is crucial, are not often analysed. The aim of the present study is to estimate species loss in the vascular plant flora of the town Strzelce Opolskie (Chełm, Silesian Upland) on the basis of the floristic literature and botanical surveys carried out from 2011 to 2013. A comparison has been made between the list of species reported up to 1945 and those species currently occurring in the study area. As a result, a list of 99 species included in the red list of plants of Opole and Silesian voivodeships is presented. Among this group, 45 species are not confirmed after 1945. Numerous extinct and endangered species are from families: Orchidaceae (8 species), Cyperaceae (7 species), Ranunculaceae (7 species) and Lamiaceae (6 species). Strongly represented are species associated with the communities of Festuco-Brometea and Querco- Fagetea classes. From the species presented, 18 species are included in "Red List of Vascular Plants of Poland" (MIREK ET AL. 2006). It was found that the extinct species represent about 7% of Strzelce Opolskie vascular plant flora. It is a focus point for local authorities to protect botanically valuable areas. Actually, the only Miejski Park is under the conservator's protection and there are few individual trees protected due to their age or size.
EN
The study is aimed at identifying pathways frequently used by non-native plant species, assessing their relative significance and development in time. Pathways were defined following NOBANIS framework (Madsen et al., 2014). Species assessments were based on HARMONIA scheme (Branquart, 2007). Four categories of environmental hazards were assessed plus two additional categories summarizing impacts on health and economy. Temporal development of pathways was assessed using cumulative per annum taxa records. To quantify the activity of investigated pathways over time an index (δ10) showing the number of new species introduced during the period of 10 years was calculated. The study shows that horticulture, landscaping and agriculture can be pointed out as pathways of concern in Iceland. A set of species of concern is also proposed. Two plant taxa are included in A list (high risk species): Anthriscus sylvestis and Lupinus nootkatensis. Three taxa are placed in B list (watch list): Heracleum mantegazzianum, Heracleum persicum and Pinus contorta. Results of the present study are compared with similar studies carried out in Denmark, Scandinavia and Baltic countries. Different measures to prevent introductions of new and potentially dangerous non-native species are also discussed including selection of good practices that may significantly reduce the threat from non-native species used in agriculture and horticulture.
EN
The paper presents the occurrence of vascular plant species in the southern part of the Pilzno commune based on monographic studies from the area of Ciężkowice and Strzyżów Foothills (Western Carpathians). The study contains a list of plant species, both native and of alien origin. For each species its habitat and sites in the ATPOL network were given.
EN
The paper presents the river valley physiography and the selected hydraulic, physics and chemical parameters of the upper section of small lowland river – Pichna Szadkowicka (the Warta river catchment, Central Poland). The strong relationship between the river and river valley habitat’s characteristics and the plant species and vegetation diversity was noted. Around one hundred (93) of vascular plant species was noted in total, including Listera ovata (strictly protected) and partially protected: Hedera helix, Viburnum opulus, Frangula alnus and Hepatica nobilis. The high natural (botanical) and landscape values of the researched section of the Pichna Szadkowicka river with adjacent parts of Wojsławice forest complex justify additionally their protection in the network of forests reference plots and of the High Conservation Value Forests (HCFV).
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