Results 141 to 150 of about 1,249 (184)

Early Maastrichtian cheilostome bryozoans from the middle Volga River region

PalZ, 2020
Eight species in six genera of cheilostome bryozoans are described from an early Maastrichtian outcrop located in the Saratov Region, middle Volga River region, southern Russia. The studied bryozoan assemblage includes a new species, Cheethamia volgaensis sp.
Anna V. Koromyslova, Vladimir B. Seltser
openaire   +1 more source

Palinostratigraphy and Paleoenvironments in the Gorodishchi Section (Middle Volga River Region, Kimmeridgian–Hauterivian)

Russian Geology and Geophysics, 2021
Abstract —Eight dinocyst-based and three spore- and pollen-based biostratigraphic units are defined in the Kimmeridgian, Volgian, and Hauterivian of the Gorodishchi section, based on a biostratigraphic analysis of the successions of marine and terrestrial palynomorphs.
openaire   +1 more source

Isotope Stratigraphy of the Permian Rocks, the Volga River Region

2017
In this investigation the 87Sr/86Sr values were considered for the Upper Kazanian regional section Pechishchi and accompanied sections of the Lower Kazanian substage and also the Lower Permian formation. The section Pechishchi is known as reference section formed within the Kazanian palaeosea.
N. G. Nurgalieva, B. I. Gareev, D. K. Nurgaliev   +2 more
openaire   +1 more source

Changes in terrestrial ecosystems of the Lower Volga region caused by river flow regulation

Arid Ecosystems, 2017
We continued our complex ecological studies in the Lower Volga region started in 2014–2015 (Kuz’mina et al., 2015a) in order to investigate the current state of floodplain terrestrial ecosystems in changing climate conditions (Kouzmina and Treshkin, 2014a) and during regulation of the river flow.
Zh. V. Kuz’mina, S. E. Treshkin
openaire   +1 more source

POND REARING OF PADDLEFISH UNDERYEARLINGS IN STURGEON POLYCULTURE IN THE LOWER VOLGA RIVER REGION

STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS. In the frame of the XXIII Agribusiness Forum of the South of Russia and the Exhibition «Interagromash» Volume 1, 2020
The cultivation of paddlefish underyearlings in polyculture with sturgeons (hybrid bester) in fish ponds was studied. The hydrochemical and hydrobiological parameters in ponds during the cultivation were investigated. A comparative assessment of the growth rates of paddlefish and bester underyearlings during one and two cycles pond cultivation has been
L.M Vasilyeva, Mahmud Elnakib, N.V. Sudakova, A.Z. Anokhina   +3 more
openaire   +1 more source

Hygienic aspects of using the resources of small rivers of the Volga region for drinking water supply on the example of the Saratov region

Sanitarnyj vrač (Sanitary Doctor), 2021
The transformations in the environment occur both under the influence of natural processes and anthropogenic influences. Small rivers are one of the most vulnerable to changes in natural objects. Wastewater is a specific source of pollution for reservoirs: the most frequent pollution of small rivers is caused by flushing from agricultural land.
Yuliya Anatolievna Pankratova, Dmitriy Evgenievich Ivanov, Anton Valerievich Kosarev, Kseniya Aleksandrovna Savina   +3 more
openaire   +1 more source

Specifics of the Organization of State Water Monitoring (On The Example of the Volga River Within the Boundaries of the Volgograd Region)

Natural Systems and Resources, 2022
The article presents materials on studying the state of the Volga River within the boundaries of the Volgograd region by analyzing monitoring studies of the water area at the regional level. To study the specifics of the organization of state control, it is necessary to have an idea of the extent of the impact of various factors at the regional level ...
Anna Matveeva, Narek Kocharyan
openaire   +1 more source

The first record of calcareous dinoflagellate cysts from the Upper Cretaceous of the Volga River Region

Doklady Biological Sciences, 2016
The taxonomic position of the microproblematics previously considered to be Foraminifera or Calcisphaerulidae is established. The first record from Russia of calcareous cysts of Dinoflagellata is presented. The microfossils originate from the Maastrichtian siliceous clay of the Volga River Region.
openaire   +2 more sources

[Gamasid mites of common voles in the central Volga River region].

Parazitologiia, 1986
The specific composition of gamasid mites from three species of voles (Microtus arvalis Pall., M. agrestis L., M. oeconomus Pall.) is given. Forest, field and flood-land groupings of the common vole having distinct phenotypical differences are characterized by differences in the structure of their parasite fauna.
V I, Borisova, I V, Nazarova
openaire   +1 more source

Effects of River Control and Climate Changes on the Dynamics of the Terrestrial Ecosystems of the Lower Volga Region

Arid Ecosystems, 2018
We continued the complex ecological studies in the Lower Volga Region that we started in 2014 in order to investigate the current state of floodplain terrestrial ecosystems and to describe the tendencies in the transformation of the natural environment and the responses of terrestrial ecosystems to changing climate conditions and the influence of ...
Zh. V. Kuzmina, S. E. Treshkin, S. S. Shinkarenko   +2 more
openaire   +1 more source