Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "microbial communities" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-8 z 8
    Tytuł:
    Field and Laboratory Studies of Encysted and Trophic Stages of Naked Amoebae: Including a Perspective on Population Life Cycle Dynamics
    Autorzy:
    Anderson, O. Roger
    Powiązania:
    https://bibliotekanauki.pl/articles/763583.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Eukaryotic microbial communities, microbial ecology, microbial survival strategies, protistan community succession
    Opis:
    Naked amoebae are among the most abundant soil protists, especially in highly productive soils. Their capacity to produce cysts during unfavorable growth periods, especially drying, enhances their survivability as resting stages and promotes dispersal by wind and air currents. However, the dynamics of their cycles of encystment and active growth are poorly documented. Using a recently developed culture observation method, including a dried preparation stage to detect encysted amoebae, data are presented on the ratios of active and encysted stages of naked amoebae based on field samples from diverse terrestrial sites differing in plant cover and moisture content during spring and summer months 2008 at a location in northeastern U.S.A. Percentage of encysted amoebae varied between 32% and 100% depending on locale and moisture content. Carbon content of the cysts (estimated from recently excysted individuals) relative to trophic stages varied between 22% and 100% at these same locales. Laboratory experimental studies of winter soil samples, that were cultured at 25oC to promote amoeba community growth, indicated that a dynamic relationship exists between active and encysted stages during proliferation with varying ratios depending on the moisture content and qualities of the soil at the collection site, thus suggesting a revised model as presented here of the encystment-excystment cycle for populations during a growth succession.
    Źródło:
    Acta Protozoologica; 2010, 49, 1
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soil Redox Potential and its Impact on Microorganisms and Plants of Wetlands
    Autorzy:
    Tokarz, E.
    Urban, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/125438.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    redox potential
    peatland
    microbial communities
    enzymatic activity
    Opis:
    Although peatlands cover only 3% of the Earth’s surface, they constitute a huge reservoir of carbon. It is estimated that they accumulate one third of carbon contained in all types of soils worldwide. Therefore, knowledge of the physical, chemical, and biological properties of peat is important for prevention of peat degradation and release of carbon stored as CO2 into the atmosphere. In organic soils, water plays a very important role as a protective factor against mineralisation of organic matter. Therefore, organic soils are characterised by high specificity and dissimilarity from mineral soils. The hydrological factor induces a variety of changes in the physical and chemical properties, e.g. low redox potential or low oxygen content in soil pores. Many soil processes are determined by the soil oxygenation status, which can be measured with various indicators as well as direct and indirect measurements. One of the indirect methods is measurement of the redox potential. The oxidation-reduction potential (redox potential or Eh) is a measure of the ratio of oxidised to reduced forms in a solution. This parameter is inextricably linked to oxygen supply and the processes of consumption thereof by microorganisms and plant roots. Therefore, the redox potential is used as an indicator of the oxygenation status and the content of biogenic forms and toxins in the soil environment and sediments. In the case of submerged soils, penetration of atmospheric oxygen into the soil is limited due to low rates of oxygen diffusion and, hence, low redox potential, which inhibits plant growth through inhibition of respiration and production of toxins in reducing conditions. The aim of this article is (1) to the show soil-plant-soil microorganism interactions taking place on peatbogs in the context of redox potential, (2) to investigate the responses of plants and soil microorganisms to the changing redox potential, and (3) to demonstrate the mechanisms of plant adaptation to the reducing conditions prevailing in peatbogs.
    Źródło:
    Journal of Ecological Engineering; 2015, 16, 3; 20-30
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microbiome dynamics modeling and analysis in relation to spatio-temporal changes in physicochemical conditions of the water ecosystem
    Autorzy:
    Woźnica, Andrzej
    Kwaśniewski, Mirosław
    Chwiałkowska, Karolina
    Łozowski, Bartosz
    Absalon, Damian
    Libera, Marcin
    Krzyżowski, Michał
    Babczyńska, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/2173791.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microbial communities
    water monitoring
    freshwater ecosystem
    metataxonomics
    Opis:
    In this paper, we consider the development of reliable tools to assess the water quality and state of aquatic ecosystems in dynamic conditions a crucial need to address. One of such tools could be devised by monitoring the taxonomic structure of reservoirs’ microbiomes. Microbial taxa’s ecological and metabolic characteristics suggest their essential roles in maintaining the water ecosystem’s environmental equilibrium. The study aimed to explain the role of diversity and seasonal variability of the microbial communities in the ecosystem stability on the example of Goczałkowice Reservoir (Poland). The structure of the reservoir microbiome was studied using bioinformatics and modeling techniques. Water was sampled periodically in July & November 2010, and April 2011 at four representative sites. The abundance and relative fraction of the limnetic taxonomic units were determined in respect to the physicochemical indices. Significant seasonal variations in the number of operational taxonomic units (OTU) were observed within the reservoir basin’s main body but not at the main tributary’s mouth. The highest values of the correlation coefficients between OTU and physicochemical variables were obtained for Burkholderiales, Pseudoanabenales, Rickettsiales, Roseiflexales, Methylophilales, Actinomycetales, and Cryptophyta. These microorganisms are proposed as indicators of environmental conditions and water quality. Metataxonomic analyses of the freshwater microbiome in the reservoir, showed that microorganisms constitute conservative communities that undergo seasonal and local changes regarding the relative participation of the identified taxa. Therefore, we propose that monitoring those variations could provide a reliable measure of the state of aquatic ecosystems.
    Źródło:
    Archives of Environmental Protection; 2022, 48, 1; 18--30
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microbial community at the front of Ecology Glacier (King George Island, Antarctica): Initial observations
    Autorzy:
    Grzesiak, Jakub
    Żmuda−Baranowska, Magdalena
    Borsuk, Piotr
    Zdanowski, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/2051701.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Antarctica
    glacial retreat
    ice-free areas
    microbial communities
    Źródło:
    Polish Polar Research; 2009, 30, 1; 37-47
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geomicrobiology of Acid Mine Drainage in the weathering zone of pyrite-bearing schists in the Rudawy Janowickie Mountains (Poland)
    Autorzy:
    Borkowski, A.
    Parafiniuk, J.
    Wolicka, D.
    Kowalczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060320.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Acid Mine Drainage
    microbial communities
    pyrite
    weathering zone
    Opis:
    This paper presents the geomicrobiological analysis of acid water reservoirs and Acid Mine Drainage (AMD) developed in the weathering zone of pyrite-bearing schists near the closed-down pyrite mine in Wieściszowice (south-western Poland). The analysis was focused on two reservoirs characterized by different physical and chemical properties (pH, redox potential, content of sulphates and heavy metals). The study is the first thorough report on the geomicrobiological relationships taking place in the AMD setting in Wieściszowice and enables a description of the microbiological processes that significantly influence biogeochemical cycles of sulfur and iron in the analyzed water reservoirs. The reservoir water also harbors numerous big, organized microbial structures in the form of streamers. Samples of these structures were studied in detail using optical and electron microscopy, as well as microbiological cultivation and molecular methods. According to the obtained results, the slime streamers from the Wieściszowice mine are characterized by the co-occurrence of typical chemolithoautotrophic microorganisms oxidizing sulphur and iron together with sulphate reducing bacteria. The presence of these structures probably depends on the occurrence of iron (II) in the surrounding environment.
    Źródło:
    Geological Quarterly; 2013, 57, 4; 601--612
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soil development and soil biology on King George Island, Maritime Antarctic
    Autorzy:
    Bölter, Manfred
    Powiązania:
    https://bibliotekanauki.pl/articles/2051556.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Antarctic
    King George Island
    soil development
    soil microbial communities
    Źródło:
    Polish Polar Research; 2011, 2; 105-116
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Leaf litterfall decomposition of pedunculate (Quercus robur L.) and sessile (Q. petraea [Matt.] Liebl.) oaks and their hybrids and its impact on soil microbiota
    Autorzy:
    Jurkšienė, Girmantė
    Janušauskaitė, Dalia
    Armolaitis, Kęstutis
    Baliuckas, Virgilijus
    Powiązania:
    https://bibliotekanauki.pl/articles/956787.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    biochemical properties
    enzymatic activity
    metabolic activity
    microorganisms
    microbial communities
    Opis:
    Trakas Forest is the only natural habitat of sessile oak in Lithuania. Sessile oak stand here is growing about 60–70 km from the nearest natural sessile oak stands in Poland. The purpose of this study was to determine whether autumn leaf litterfall of pedunculate and sessile oaks and their hybrids have different biochemical composition and decomposition rate and, consequently, different impacts on microbial condition of rhizosphere. For this purpose in autumn leaf litterfall C, N, P, K, Ca, Mg, lignin, ash, fat, crude fibre and water-soluble carbohydrates contents and stocks, lignin/N, lignin/P, C/N, C/P, N/P ratios, the decomposition rate and CO2 emissions were determined. In rhizosphere of studied oak species N, C concentration, pHH2O, C/N ratio, and dehydrogenase, urease, phosphatase, bacteria and micromycetes amount were estimated as well. The litterfall of pedunculate oak was distinguished by a higher content of lignin, higher lignin/N ratio, lower decay rate and lower carbon release, which determines decreased activity of micromycetes in the rhizosphere. Metabolic activity of microorganisms differed insignificantly among tree species rhizospheres. However, the potential for the use of carbon compound substrates and biodiversity index have a tendency to be higher in the soil under sessile oak. Lower decomposition rate of leaf litterfall and organic compounds in the rhizosphere under pedunculate oak allowed to suppose that the conditions for natural regeneration were more suitable in stands where sessile and hybrid oaks dominate.
    Źródło:
    Dendrobiology; 2017, 78; 51-62
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eukaryotic Microbial Communities Associated with Rock-dwelling Foliose Lichens: A Functional Morphological and Microecological Analysis
    Autorzy:
    Bock, Nicholas
    Anderson, O. Roger
    Powiązania:
    https://bibliotekanauki.pl/articles/763746.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Algal symbiosis, amebas, bacteria, carbon-biomass, Flavoparmelia, food webs, heterotrophic nanoflagellates, microbial communities
    Opis:
    Lichens are widely recognized as important examples of a fungal-algal or fungal-cyanophyte symbiosis; and in some cases they are a major food source for some animal grazers such as caribou (Rangifer tarandus), especially in the Arctic during winter. However, relatively little is known about the ecology of their co-associated bacterial and protistan communities. This is one of the first reports of an analysis of microbial communities associated with rock-dwelling foliose lichens (Flavoparmelia sp.), including a more detailed analysis of the microbial communities associated with segments of the shield-like, radially arranged lobes. Samples were taken from lichens on granite boulders beneath an oak and maple tree stand on the Lamont-Doherty Earth Observatory Campus, Palisades, N.Y. The bacteria and protist members of the lichen associated microbial communities are comparable to recently reported associations for foliose lichens growing on tree bark at the same locale, including the presence of large myxomycete plasmodial amebas, heterotrophic nanoflagellates, and naked and testate amebas. To obtain evidence of possible differences in the microecology of different portions of each radial lobe, three segments of the radial lobe in the shield-like lichen were sampled: 1) inner, more mature, central segment; 2) middle section linking the central and peripheral segments; and 3) outer, peripheral, usually broader, less closely attached segment. The mean densities (number/g) and biomasses (µg/g) of bacteria and heterotrophic nanoflagellates were highest in the older central segment and lowest in the peripheral segment of the radial lobes, especially when expressed on moist weight basis. Large myxomycete plasmodial amebas were typically located in the outermost segment of the radial lobe. The proportion of vannellid amebas (Vannella spp. and Cochliopodium spp.) were significantly more abundant in the samples of the inner lobes compared to non-vannellid amebas that were more prevalent in the outer lobes. The outer segment of the thallus lobe was typically more spongiose and absorbed more water per unit weight (based on a wet/dry-weight ratio) than the innermost segment. In general, patterns of densities and taxonomic composition of bacteria and eukaryotic microbes intergraded from the inner most segment to the outer part of each lobe – indicating a possible microecological gradient, coincident with the age-related and morphological radial gradations of the lobe. Overall, the evidence shows that the radial variation in the morphology and age-related variables of the three lobe segments may affect the microenvironment of the lobe segments and hence influence the organization of the microbial communities within each segment.
    Źródło:
    Acta Protozoologica; 2015, 54, 4
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies