scholarly journals The dynamics of quantitative changes of mycoflora in two lakes differing in trophicity (Poland). II

2014 ◽  
Vol 29 (2) ◽  
pp. 159-168 ◽  
Author(s):  
Teresa Korniłłowicz
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Filamentous Fungi ◽  
Surface Waters ◽  
Littoral Zone ◽  
Eutrophic Lake ◽  
Early Summer ◽  
Yeast Fungi ◽  
Quantitative Changes ◽  
Minimum Numbers

It was demonstrated that waters of the mesotrophic lake undergoing accelerated eutrophication had a higher number of yeast fungi in comparison with the waters of an eutrophic lake. The greatest concentration of yeasts occurred in the littoral zone supplied with soil organic matter as well as in the waters of metha- and hypolimnion distinguished by a high pbytoplankton activity Filamentous fungi concentrated most numerously in the coastal and surface waters of both lakes. However. they did not show any distinct relationship with the trophicity of the reservoir. The maximum numbers of yeasts and geophilic moulds was mainly noted in spring whereas as minimum numbers occurred in early summer.

scholarly journals The dynamics the quantitative changes of mycoflora in two lakes differing in trophicity (Poland). I.

2014 ◽  
Vol 29 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Teresa Korniłłowicz
Keyword(s):  
Littoral Zone ◽  
Eutrophic Lake ◽  
Saprophytic Fungi ◽  
Mesotrophic Lake ◽  
Annual Changes ◽  
Quantitative Changes

It was demonstrated that the number of saprophytic fungi in the population of plankton in mesotrophic lake changing to eutrophic (Lake Piaseczno) was mountained a similiar level (average values) as in the eutrophic one (Lake Głębokie). The seasonal and annual changes in the number of fungi in the waters of the lake with lower trophicity were markedly stronger than those in the lake with higher trophicity. In the mesotrophic lake this was connected with the intensity of phytoplankton development. The greatest accumulation of fungi occured in the waters of littoral zone in both lakes and in the pelagial metha- and hypolimniun of the Lake Piaseczno.

Microscopic fungi of lithobiont communities of Argentine Islands Region: Data from the 22nd Ukrainian Antarctic Expedition

2020 ◽  
Vol 62 (1-2) ◽  
pp. 49-68
Author(s):  
T. O. Kondratiuk ◽  
T. V. Beregova ◽  
I. Yu. Parnikoza ◽  
S. Y. Kondratyuk ◽  
A. Thell
Keyword(s):  
Filamentous Fungi ◽  
Mucor Circinelloides ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Microscopic Fungi ◽  
Rhodotorula Rubra ◽  
Yeast Fungi ◽  
Antarctic Expedition ◽  
Geomyces Pannorum ◽  
Active Substances

The identification of the diversity of microscopic fungi of lithobiont communities of the Argentine Islands in specimens collected during the 22nd Ukrainian Antarctic Expedition was the purpose of this work. Samples of rock, soil, mosses and lichens of rock micro-habitats of “Crustose lichen sub-formation and fruticose lichen and moss cushion sub-formation” were used in the work. These samples were used for extracting and cultivation of filamentous fungi on dense nutrient media. Determination of physiological and biochemical characteristics and identification of yeast-like fungi were performed using a microbiological analyser ‘Vitek-2’ (‘Bio Merieux’, France). Cultivation of microorganisms was carried out at temperatures from +2 to +37 °C. In results cultures of microscopic fungi of Zygomycota (Mucor circinelloides), Ascomycota (species of the genera cf. Tlielebolus, Talaromyces), representatives of the Anamorphic fungi group (Geomyces pannorum, species of the genera Alternaria, Acremonium, Aspergillus, Penicillium, and Cladosporium) were isolated from Antarctic samples. Microscopic fungi Penicillium spp. were dominated after the frequency in the studied samples (54.5%). Rhodotorula rubra and Candida sp. among isolated yeast fungi, and dark pigmented fungi represented by Aureobasidium pulhdans and Exophiala spp. were identified. The biological properties of a number of isolated fungi (the potential ability to synthesise important biologically active substances: melanins, carotenoids, lipids) are characterised. Mycobiota of rock communities of Argentine Islands is rich on filamentous and yeast fungi similarly to other regions of Antarctica. A number of fungi investigated are potentially able to synthesise biologically active substances. The dark pigmented species of the genera Cladosporium, Exophiala, Aureobasidium pulhdans, capable of melanin synthesis; ‘red’ yeast Rhodotorula rubra (carotenoid producers and resistant to toxic metals); Mucor circinelloides and Geomyces pannorum, lipid producers, are among these fungi. Yeast-like fungi assimilated a wide range of carbohydrates, which will allow them to be further used for cultivation in laboratory and process conditions. The collection of technologically promising strains of microorganisms, part of the Culture Collection of Fungi at Taras Shevchenko National University of Kyiv (Ukraine), is updated with isolated species (strains) of filamentous fungi and yeast – potential producers of biologically active substances, obtained within this study.

Soil Organic Matter

1962 ◽  
Vol 54 (5) ◽  
pp. 470-470
Author(s):  
T. M. McCalla
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter
Sign in / Sign up

Export Citation Format

Share Document