Aquatic vegetation (Lemnetea, Potametea) of the Ob river floodplain (within the limits of Aleksandrovskiy district of Tomsk region)

2008 ◽  
pp. 68-75 ◽  
Author(s):  
G. S. Taran
Keyword(s):  
Western Siberia ◽  
Aquatic Vegetation ◽  
Ceratophyllum Demersum ◽  
River Floodplain ◽  
Ob River ◽  
Tomsk Region ◽  
Potamogeton Natans

In the Ob river floodplain between the mouths of its tributaries Vakh and Tym (within the limits of Aleksandrovskiy district of Tomsk region), phytocoenoses belonging to 9 associations and 2 communities of Braun-Blanquet classification vegetation classes are listed. Class Lemnetea is represented by associations Ricciocarpetum natantis (Segal 1963) Tx. 1974, Lemnetum trisulcae Soó 1927, Stratiotetum aloidis Miljan 1933; class Potametea is done by asso­ciations Potametum perfoliati Koch 1926, Myriophylletum sibirici Taran 1998, Myriophylletum verticillati Soó 1927, Potametum graminei Koch 1926, Potametum pectinati Carstensen 1955, Nymphoidetum peltatae (All. 1922) Bellot 1951, as well as Sagittaria natans and Potamogeton natans—Ceratophyllum demersum communities. The syntaxa distribution in Western Siberia and adjoining territories is characterized.

The epiphytic communities of various ecological types of aquatic vegetation of five pastoral ponds

Biologia ◽  
2009 ◽  
Vol 64 (1) ◽  
Author(s):  
Beata Messyasz ◽  
Natalia Kuczyńska-Kippen ◽  
Barbara Nagengast
Keyword(s):  
Phragmites Australis ◽  
Aquatic Vegetation ◽  
Typha Latifolia ◽  
Water Bodies ◽  
Potamogeton Pectinatus ◽  
Ceratophyllum Demersum ◽  
Potamogeton Crispus ◽  
Small Water ◽  
Epiphytic Communities ◽  
Potamogeton Natans

AbstractFive small water bodies located within the agricultural region of Wielkopolska (west Poland) underwent investigation. Periphyton samples were collected from various macrophyte habitats representing rush vegetation (in five water bodies), submerged aquatic plants (in three) and nymphaeids (in one): Palędzie — Ceratophyllum demersum, Potamogeton crispus, Typha latifolia; Batorowo — Phragmites australis; Piotrowo — Potamogeton natans, Ceratophyllum submersum, Typha latifolia; Tarnowo Podgórne — Typha latifolia; Dąbrówka — Zannichellia palustris, Potamogeton pectinatus, Phragmites australis.The main goal of the study was to determine the composition and abundance of the periphytic communities inhabiting various types of rush and water vegetation of five water bodies located within a mid-field landscape area.Diatoms such as Achnanthidium minutissimum, Amphora ovalis, Cocconeis placentula orNavicula cincta revealed significantly higher densities in the zone of elodeids, while green algae prevailed among nymphaeids. As a result of this study it was found that the epiphytic algae were characterised by much lower diversity in respect to a specific water body, though much greater diversity was observed in its relation to the type of substratum. Two types of habitats were distinguished — the first of simple build (helophytes and nympheids) and the second containing the complicated architecture of plant stems (elodeids).

Epigenetic changes of acidic volcanites from the top of the Western Siberia Pre-Jurassic complex

2019 ◽  
pp. 35-43
Author(s):  
A. V. Krasnova ◽  
Yu. V. Rostovtseva ◽  
A. E. Gavrilov
Keyword(s):  
Low Temperature ◽  
Western Siberia ◽  
Hydrothermal Solutions ◽  
Epigenetic Changes ◽  
Reservoir Properties ◽  
Tomsk Region

The study of secondary changes of acidic effusives with reservoir properties from the top of the Western Siberia pre-Jurassic complex (Tomsk Region) was produced. Lithological, petrographic and mineralogical features of these rocks indicate their change by low-temperature hydrothermal solutions, while weathering products, which are widely spread at the top of the basement, have not been clearly defined. Reservoir properties of studied rocks were formed probably due to fracturing and leaching.

scholarly journals The effect of ice phenology exerted on submerged macrophytes through physicochemical parameters and the phytoplankton abundance

2015 ◽  
Author(s):  
Wojciech Ejankowski ◽  
Tomasz Lenard
Keyword(s):  
Physicochemical Parameters ◽  
Aquatic Vegetation ◽  
Myriophyllum Spicatum ◽  
Ice Cover ◽  
Water Transparency ◽  
Ceratophyllum Demersum ◽  
Total Biomass ◽  
Eutrophic Lakes ◽  
Macrophyte Species ◽  
Tn:Tp Ratio

<p>The physicochemical parameters of water, the concentration of chlorophyll-<em>a</em> and the submerged aquatic vegetation (SAV) were studied to evaluate the effects of different winter seasons on the biomass of macrophytes in shallow eutrophic lakes. We hypothesised that a lack of ice cover or early ice-out can influence the physicochemical parameters of water and thus change the conditions for the development of phytoplankton and SAV. The studies were conducted in four lakes of the Western Polesie region in mid-eastern Poland after mild winters with early ice-out (MW, 2011 and 2014) and after cold winters with late ice-out (CW, 2010, 2012 and 2013). The concentrations of soluble and total nitrogen, chlorophyll-<em>a</em> and the TN:TP ratio in the lakes were considerably higher, whereas the concentration of soluble and total phosphorus and water transparency were significantly lower after the MW compared with after the CW. No differences were found in water temperature, reaction and electrolytic conductivity. Low water turbidity linked with low concentration of chlorophyll-<em>a</em> after the CW resulted in increased water transparency and the total biomass of the SAV. The negative effect of the MW on the macrophyte species was stronger on more sensitive species (<em>Myriophyllum spicatum</em>,<em> Stratiotes aloides</em>) compared with shade tolerant <em>Ceratophyllum demersum</em>. Our findings show that the ice cover phenology affected by climate warming can change the balance between phytoplankton and benthic vegetation in shallow eutrophic lakes, acting as a shift between clear and turbid water states. We speculate that various responses of macrophyte species to changes in the water quality after two winter seasons (CW and MW) could cause alterations in the vegetation biomass, particularly the expansion of shade tolerance and the decline of light-demanding species after a series of mild winters.</p>

scholarly journals FISH INFECTIONS BY TREMATODES OF THE GENUS POSTHODIPLOSTOMUM IN THE SOUTHERN REGIONS OF THE TOMSK REGION

2020 ◽  
Author(s):  
E.A. Serbina ◽  
◽  
E.A. Interesova ◽  
◽  
Keyword(s):  
Final Host ◽  
Ob River ◽  
The North ◽  
Tomsk Region

Infection of the fish with trematode metacercariae of the genus Posthodiplostomum in rivers in the southern regions of the Tomsk region are presented. In this study it was shown that the abundance trematode metacercariae of the genus Posthodiplostomum is statistically significantly higher in fish in the Ob river in comparison with the Tom river. The assumption is put forward that the appearance of this parasite on the territory of the Tomsk Region is associated with the expansion to the north of the area of the gray heron Area cinereal, which is the final host of trematodes of the genus Posthodiplostomum.

scholarly journals Heat flow and presence of oil and gas (the Yamal peninsula, Tomsk region)

Georesursy ◽  
2019 ◽  
Vol 21 (3) ◽  
pp. 125-135
Author(s):  
Valery I. Isaev ◽  
Galina A. Lobova ◽  
Alexander N. Fomin ◽  
Valery I. Bulatov ◽  
Stanislav G. Kuzmenkov ◽  
...  
Keyword(s):  
Heat Flow ◽  
Western Siberia ◽  
Oil And Gas ◽  
Sedimentary Cover ◽  
The Arctic ◽  
Yamal Peninsula ◽  
Flow Density ◽  
Positive Anomaly ◽  
Tomsk Region ◽  
History Of

The possibilities of Geothermy as a geophysical method are studied to solve forecast and prospecting problems of Petroleum Geology of the Arctic regions and the Paleozoic of Western Siberia. Deep heat flow of Yamal fields, whose oil and gas potential is associated with the Jurassic-Cretaceous formations, and the fields of Tomsk Region, whose geological section contents deposits in the Paleozoic, is studied. The method of paleotemperature modeling was used to calculate the heat flow density from the base of a sedimentary section (by solving the inverse problem of Geothermy). The schematization and mapping of the heat flow were performed, taking into account experimental determinations of the parameter. Besides, the correlation of heat flow features with the localization of deposits was revealed. The conceptual and factual basis of research includes the tectonosedimentary history of sedimentary cover, the Mesozoic-Cenozoic climatic temperature course and the history of cryogenic processes, as well as lithologic and stratigraphic description of the section, results of well testing, thermometry and vitrinite reflectivity data of 20 deep wells of Yamal and 37 wells of Ostanino group of fields of Tomsk region. It was stated that 80 % of known Yamal deposits correlate with anomalous features of the heat flow. Bovanenkovskoe and Arkticheskoe fields are located in positive anomaly zones. 75 % of fields of Ostanino group relate to anomalous features of the heat flow. It is shown that the fields, which are characterized by existence of commercial deposits in the Paleozoic, are associated with the bright gradient zone of the heat flow. The forecast of commercial inflows in the Paleozoic for Pindzhinskoe, Mirnoe and Rybalnoe fields is given. The correlation between the intensity of naftidogenesis and the lateral inhomogeneity of the deep heat flow is characterized as a probable fundamental pattern for Western Siberia.

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