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Wyszukujesz frazę "ecosystems" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Groundwater dependent ecosystems and man : conflicting groundwater uses
Autorzy:
Wachniew, P.
Witczak, S.
Postawa, A.
Kania, J.
Żurek, A.
Różański, K.
Dulliński, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060474.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
groundwater
ecosystems
modelling
indicators
tracers
Opis:
Groundwater Dependent Ecosystems (GDE) are important elements of biodiversity and providers of valuable goods and services to society. Preservation of their environmental functions in the face of increasing anthropogenic pressures on groundwater resources and progressive climate change depends on appropriate environmental policies and water resources management. A brief overview of current knowledge of the functioning of GDE and their relations with groundwater is given in the first part of the article. Effective incorporation of GDE into the policy and practice of water resources management depends on thorough understanding of how hydrogeological processes and human impacts influence the quantity and quality of groundwater available to ecosystems. Major scientific challenges in this regard are related to adequate representation of GDE in the conceptual and re lated numeri cal models of groundwater systems. An example of a GDE (Wielkie Błoto fen in southern Poland) is discussed in some detail in the second part of the article. It illustrates some of the pressures and threats which GDE located in densely populated regions of the European continent are experiencing nowadays. Selected research tools used to quantify those pressures and threats are described and discussed.
Źródło:
Geological Quarterly; 2014, 58, 4; 695--706
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Hydrogeologiczny aspekt w identyfikacji i ochronie ekosystemów zależnych od wód podziemnych
Autorzy:
Krogulec, E.
Sawicka, K.
Powiązania:
https://bibliotekanauki.pl/articles/2074932.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
ekosystem wód podziemnych
ekosystemy mokradłowe
hydrostrefy bagienne
Kampinoski Park Narodowy
groundwater dependent ecosystems
wetlands
wetlands hydrozone
Kampinos National Park
Opis:
Protection of water and water-depended ecosystems, in a view of their huge environmental role and high sensitivity to changes of environmental conditions, is one of the fundamental issues included in the legal acts in force, agreements, international conventions, directives and projects. Strong variety of groundwater-depended ecosystems practically causes impossibility to elaborate on an universal methodology for defining their environmental needs. Wetlands are one of the most differentiated groundwater-depended ecosystems, for which the programmes of hydrogeological researches in the range of diagnosis and prognosis of groundwater level changes necessitate an individual adjustment to the study area. Researches of the groundwater-depended ecosystems, including wetlands, mostly in a range of their protection and renaturalisation, require an interdisciplinary approach. On the basis of the researches conducted in the wetland areas in the Kampinos National Park, different hydro-environmental factors determining groundwater level changes in those wetlands were presented. The variety of values and dependences were obtained as a results of the conducted calculations of groundwater levels correlation with different factors. Results of the researches allow to point at the regions, where groundwater levels dependence on precipitation values is significant and the regions, where other factors than infiltration recharge values, have important impact on groundwater table depth. An analysis of trend of changes requires constant update of the monitoring data concerning of groundwater levels in wetland areas. The valorization of vegetation cover and soils done directly (locally) during the field works or on the basis of the papers containing soil characteristic and peatland documentations, requires generalization, adapted to the specificity of the hydrogeological researches in regional scale. Huge spatial differentiation, time-change variation, and secondary transformation processes of the vegetation and soil types, causes, that the results of the vegetation and habitat studies can not be directly used for identification of the factors determining groundwater table level.
Źródło:
Przegląd Geologiczny; 2012, 60, 3; 164-174
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relacja wilgotności siedlisk roślinnych i stanów wód podziemnych w ekosystemach zależnych od wód podziemnych
The relationship of the plant habitats moisture and groundwater levels in groundwater dependent ecosystems
Autorzy:
Krogulec, E.
Powiązania:
https://bibliotekanauki.pl/articles/2062193.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
ekosystemy zależne od wód podziemnych
stany wód podziemnych
wilgotność siedlisk roślinnych
monitoring wód podziemnych
groundwater depended ecosystems
level of groundwater
plant habitat moisture
groundwater monitoring
Opis:
W artykule przedstawiono wyniki regularnych obserwacji monitoringowych wód podziemnych w ekosystemach zależnych od wód podziemnych. Na podstawie analizy geostatystycznej określono średnie stany wód w całym badanym systemie. Obliczono korelację pomiędzy czynnikami środowiskowymi jakimi są siedliska roślinne i stany wód podziemnych w celu identyfikacji obszarów, w których wpływ czynników antropogenicznych jest znikomy oraz takich, w których występowała roślinność siedlisk suchszych niż wynikałoby to z poziomu wód podziemnych. W obszarach tych określono i zdefiniowano rolę czynników antropogenicznych.
Regular monitoring observations of groundwater ecosystems dependent on groundwater level are presented in this paper. The medium water levels in throughout the study system were determined by geostatistical analysis. The correlation between environmental factors such as plant habitats and groundwater levels was calculated in order to identify areas in which the influence of anthropogenic factors is negligible, and those in which there was drier vegetation habitats than it is consistent with the groundwater level. The role of anthropogenic factors was defined in these areas.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2013, 456 Hydrogeologia z. 14/1; 321--326
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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