Przeglądaj wg Autor "Piotrowska, Julia"

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    PozycjaOpen Access
    Nowe stanowisko ostnicy piaskowej Stipa borysthenica i uwagi o jej rozmieszczeniu na Pomorzu Zachodnim
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2011) Waloch, Piotr; Piotrowska, Julia; Zakład Botaniki i Ochrony Przyrody, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Zakład Botaniki i Ochrony Przyrody, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie
    Stipa borysthenica is a protected, vulnerable species which appears in a sandy dry grasslands. In Poland it is known from a few stands in the margin zone of the Lower Odra Valley. In 2006 a locality of this species was found in the vinicity of Dolna Odra power station near Gryfino (Western Pomerania, Poland). Stipa borysthenica occurs here in the Spergulo vernalis-Corynephoretum community. The increasing of tufts number from 29 in 2006 to 41 in 2010 indicates good condition of Stipa population. Devastation by people is the biggest threat to population of Stipa borysthenica.
  • Miniatura
    PozycjaOpen Access
    Ocena stanu zachowania wybranych populacji goryczki krzyżowej (Gentiana cruciata) na Pomorzu Zachodnim
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2010) Piotrowska, Julia; Katedra Botaniki i Ochrony Przyrody, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie
    Gentiana cruciata is a protected species which appears relatively rarely in xerotermic communities. The research on the population of this species was carried out in 2006. Number of specimens, density and spatial structure were examined on 5 × 5 m experimental areas. Floristic composition of phytocoenoses were characterized, too. In Kamieniec and Nawodna the population of Gentiana cruciata was found in Adonido-Brachypodietum pinnati communieties for which Gentiana is characteristic species. In Nawodna it is estimated on 1370 specimens. The greatest population of Gentiana cruciata appears on this area and its characteristic feature is the diversity of length of stems and the number of flowers. The numerous population from Kamieniec is characterized by the changebility of biometric parameters because of diversified habitat conditons. The population from Zdroje takes up the smallest area (106 specimens) where the most frequent blossoming was marked. The part of blossoming specimens was smaller because the worsening of light conditons. The aggregate type of spatial distribution was found in all examined populations.
  • Miniatura
    PozycjaOpen Access
    Roślinność torfowisk alkalicznych rezerwatu „Wielkopolska Dolina Rurzycy”
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2011) Wołejko, Lesław; Piotrowska, Julia; Zakład Botaniki i Ochrony Przyrody, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Zakład Botaniki i Ochrony Przyrody, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie
    A survey of plant communities of 8 rich fens found in the newly established nature reserve „Wielkopolska Dolina Rurzycy” has been performed on the basis of the phytosociological research. A present day vegetation cover of these fens is composed of 11 plant communities belonging to three vegatation classes: Scheuchzerio-Caricetea nigrae, Phragmitetea and Molinio-Arrhenatheretea. The spatial relationship between the different mire components is analysed in respect to history of land use and the mire regeneration processes. Concepts of active mire protection is discussed in relation to particular local situation and hydrological conditions.
  • Miniatura
    PozycjaOpen Access
    Stan i zagrożenia populacji Luronium natans (l.) Rafin w Jeziorze Orzechowskim koło Nowogardu
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2011) Kowalski, Wojciech W. A.; Piotrowska, Julia; Zakład Botaniki i Ochrony Przyrody, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Zakład Botaniki i Ochrony Przyrody, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie
    Luronium natans is a rare, endangered and protected species, which requires areas Nature 2000 to be designated. The research on the population of this species in Orzechowskie Lake (Western Pomerania, Poland) was conducted in 2007. 21 concentrations of Luronium natans, each on area 0.04–1.0 m2 were recorded and characterized. In 12 of them blooming specimens were observed, but fruits were not found. The plant propagates only vegetative on described site. On the basis of 12 releves Luronietum natantis community was distinguished with Luronium natans and Hydrocotyle vulgaris as dominant.