Autor: Ziaja, Maria - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Thermophilic plant communities in Natura 2000 site „Łąki nad Wojkówką” PLH 180051 – Podkarpacke Province
Autorzy:: Ziaja, Maria
Wójcik, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/763877.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Opis:: Xerothermic grasslands are among the most valuable and, at the same time, the most vulnerable elements of the natural environment of Poland. Their high natural value is reflected in the presence of numerous species of plants originating from warmer, steppe regions of Europe, which increase the biodiversity of local ecosystems. In our climate circumstances, such plant communities have extrazonal character and only occur in places with specific habitat conditions. The grasslands generally occupy small areas, usually in warm and dry habitats, mainly on slopes exposed to strong sunlight and slopes with southern exposures. The aim of the research was to provide a phytosociological characteristics of the thermophilous grasslands PLH 180051 – “Łąki nad Wojkówką”, their distribution and threats as well as the prospects for conservation of the communities. On the study area, a significant share belongs to the communities with species characteristic of the Festuco-Brometea class and Trifolio-Geranietea class. Lack of species characteristic for lower syntaxonomic units does not allow for them to be classified as an association.
Źródło:: Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia; 2014, 69, 1
2083-3563
0066-2232
Pojawia się w:: Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Conservation status and trends in the transformation of Molinia meadows in the Laki w Komborni Natura 2000 site, SE Poland
Stan zachowania i kierunki przemian łąk trzęślicowych na obszarze Natura 2000 Łąki w Komborni (Polska południowo-wschodnia)
Autorzy:: Ziaja, Maria
Wójcik, Tomasz
Wrzesień, Małgorzata
Powiązania:: https://bibliotekanauki.pl/articles/1628276.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: meadow community
conservation
secondary succession
species diversity
Molinia meadows
Opis:: The aim of this study was to provide a phytosociological and ecological characterization of meadow communities in the Łąki w Komborni Natura 2000 site (SE Poland), assess the trends in their transformation, and indicate the major threats impacting on their conservation. The study was conducted in 2015–2016. Three types of meadow communities were distinguished (alliances Molinion, Arrhenatherion, Filipendulion), due to the absence of the species characteristic for associations. The species richness noted per relevé differed significantly between the types of meadows (Kruskal–Wallis test: H = 21.65, p < 0.05). The highest floristic biodiversity (H' = 2.99) was noted for the meadow patches classified as in the Molinion alliance and the lowest (H' = 2.50) was found for the patches from the Filipendulion alliance. Mean values of the ecological indicators (F, R, N) differed between the meadow communities. The greatest disparity was noted for the mean values of the soil moisture indicator (from 6.42 to 7.45). Patches classified in the Filipendulion alliance were developed on the wettest soil substratum, whereas the patches classified in the Arrhenatherion alliance were predominant on a relatively dry substratum. The abandonment of traditional management practices (grazing, mowing) has contributed to transformation of the Molinia meadows, disappearance of characteristic species and succession of shrubs. The Molinia meadow habitat should be conserved by improvement of protection measures (appropriate mowing regime and removal of biomass) to conserve a high species richness and the rare and protected plant species.
Celem pracy była charakterystyka fitosocjologiczna i ekologiczna zbiorowisk łąkowych na obszarze Natura 2000 Łąki w Komborni (SE Polska) oraz ocena kierunków zmian wraz ze wskazaniem głównych zagrożeń. Badania przeprowadzono w latach 2015–2016. W kompleksie wyróżniono trzy typy zbiorowisk, które ze względu na brak gatunków charakterystycznych dla zespołów oraz znaczne przekształcenia fitocenoz podano w randze związku (Molinion, Arrhenatherion, Filipendulion). Zbiorowiska różniły się bogactwem gatunkowym (H = 21.65, p < 0.05). Najwyższą bioróżnorodność florystyczną (H' = 2.99) miały płaty ze związku Molinion, a najniższą (H' = 2.50) ze związku Filipendulion. Średnie wartości wskaźników ekologicznych (F, R, N) były różne dla wydzielonych zbiorowisk. Największe różnice zanotowano w średnich wartościach wskaźnika wilgotności gleby (od 6.42 do 7.45). Na podłożu najbardziej wilgotnym dominowo zbiorowisko z Filipendulion, a na stosunkowo suchym zbiorowisko z Arrhenaterion. Brak tradycyjnego użytkowania (wypas, koszenie) spowodowało przekształcanie łąk trzęślicowych, zanik gatunków charakterystycznych oraz postępujący proces sukcesji. Z uwagi na duże bogactwo gatunkowe, obecność rzadkich i chronionych taksonów istnieje potrzeba zachowania siedliska łąk trzęślicowych na badanym terenie wraz z koniecznością wprowadzenia zabiegów ochronnych (koszenie, usuwanie biomasy).
Źródło:: Acta Agrobotanica; 2017, 70, 3
0065-0951
2300-357X
Pojawia się w:: Acta Agrobotanica
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Early Jurassic dinosaur-dominated track assemblages, floristic and environmental changes in the Holy Cross Mountains region, Poland
Autorzy:: Pacyna, Grzegorz
Ziaja, Jadwiga
Barbacka, Maria
Pieńkowski, Paweł
Jarzynka, Agata
Niedźwiecki, Grzegorz
Powiązania:: https://bibliotekanauki.pl/articles/2201217.pdf
Data publikacji:: 2022
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: Mesozoic
ecosystems
tetrapod tracks
plant macrofossils
palynomorphs
trace fossils
Opis:: The Early Jurassic succession of the Holy Cross Mountains region in Poland offers a rare opportunity to study ecosystem complexity during the evolution and diversification of early dinosaurs, especially herbivorous ones. The section consists of continental and coastal deposits containing fossil assemblages spanning nearly 25 My of changes in terrestrial plants and some groups of invertebrates and tetrapods. Based on macrofossils and pollen and spores, the broader characteristics of the flora in this succession are presented. The floral assemblages show typical Early Jurassic characteristics and contain lycopsids, sphenopsids, ferns, cycadaleans, bennettitaleans, gnetaleans and ginkgoaleans, as well as conifers, and are similar to other Hettangian–Toarcian floral successions in Europe, showing the presence of a vast coniferous forest dominated by Hirmeriella in the early Hettangian, replaced by ginkgophyte-dominated floras in younger stages and araucarian conifer-dominated forests in the late Pliensbachian. Dinosaurs are documented mainly from their trace fossils (tracks and coprolites). Six distinct track assemblages (stratigraphically separated ichnoassemblages) of different ages can be identified. Current evidence indicates that while Anomoepus tracks are abundant throughout the long Hettangian–late Pliensbachian interval, medium-sized to large ornithischian tracks do not occur below the lower–middle Hettangian transition zone, associated with the first major marine transgression in the region. Hettangian strata with different theropod tracks (Grallator, Anchisauripus, Eubrontes, Kayentapus, cf. Megalosauripus), small Anomoepus tracks, numerous medium-sized Anomoepus-like tracks, Moyenisauropus tracks, tetradactyl tracks of sauropodomorphs (cf. Pseudotetrasauropus) and oval-shaped tracks of sauropods (Parabrontopodus) significantly contrast with the higher part of the Lower Jurassic succession (upper Pliensbachian Drzewica Formation and middle–upper Toarcian Borucice Formation) containing new types of medium-sized to large theropod tracks (Therangospodus), small and medium-sized bird-like tridactyl tracks (cf. Trisauropodiscus, cf. Anomoepus), exceptionally large, oval-shaped sauropod tracks (Sauropoda indet.), and new types of medium-sized and large ornithischian tracks (cf. Deltapodus, cf. Anomoepus). This points to a noticeable difference between the Hettangian and late Pliensbachian–Toarcian dinosaur ichnofaunas and may facilitate the study of regional and global changes and correlations. Both the palaeofloras and dinosaur trace fossils document ecosystem diversity and ecosystem changes, presented here in review form. The nature of these changes requires more detailed study, but preliminary results suggest the occurrence of rather complex and pronounced transformations in the dinosaur communities of the Holy Cross Mountains region. Based on our observations, the most significant event in Early Jurassic ecosystems took place within the Hettangian (change in floristic composition, the emergence of new groups of dinosaurs), but we also found what we believe to be a record of a major faunal turnover across the late Pliensbachian–middle–late Toarcian interval.
Źródło:: Geological Quarterly; 2022, 66, 3; art. no. 29
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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