Results 21 to 30 of about 259 (177)

Climate monitoring as an indicator of the hydrological condition of the Siversky Donets river basin

open access: yesВісник Харківського національного університету імені В.Н. Каразіна. Серія Геологія. Географія. Екологія, 2022
Formulation of the problem. Today, in changing climate conditions, it is very relevant to study the impact of regional climate change on the regime of hydrological indicators and ecological status of the Siversky Donets river basin within Kharkiv region.
Svitlana Reshetchenko   +4 more
doaj   +1 more source

Sedimentary Structure Derived From Multi‐Mode Ambient Noise Tomography With Dense OBS Network at the Japan Trench

open access: yesJournal of Geophysical Research: Solid Earth, Volume 126, Issue 6, June 2021., 2021
Abstract We derive the 3‐D S‐wave velocity structures of sediments and upper crust in the region off Ibaraki at Japan Trench subduction zone by applying ambient noise tomography to a dense array of short‐period ocean bottom seismometers (OBSs). The cross‐spectra were calculated using 27 or 142‐day continuous seismic data, and the phase velocities of ...
Lina Yamaya   +3 more
wiley   +1 more source

Population and distribution of beavers Castor fiber and Castor canadensis in Eurasia

open access: yesMammal Review, Volume 51, Issue 1, Page 1-24, January 2021., 2021
A century ago, overhunting had reduced Eurasian beaver Castor fiber populations to c. 1200 animals in scattered refugia from France to Mongolia. Reintroductions and natural spread have since restored beavers to wide areas of their original range. The population has more than tripled since the first modern estimate in 1998, to c. 1.5 million.
Duncan J. Halley   +2 more
wiley   +1 more source

AMMONOID BIOSTRATIGRAPHY OF THE BASHKIRIAN (PENNSYLVANIAN) IN THE DONETS BASIN

open access: yesCollection of Scientific Works of the Institute of Geological Sciences of the NAS of Ukraine, 2022
The article provides a rationale for beds with ammonoids in the Bashkirian and lower part of the Moscovian of the Donets Basin, Ukraine. In the lower part of the Bashkirian (Voznesenskian, Feninskian, Manuilivskian and Blagodatnenskian horizons), the Beds with Homoceras (correlated with the Homoceras Genozone), Beds with Reticuloceras (correlated with ...
openaire   +3 more sources

What the distribution of sperm size can tell about the stability of spermatogenesis in hybrid frogs Pelophylax esculentus

open access: yesВісник Харківського Національного Університету Імені В.Н. Каразіна: Серія Біологія, 2021
Interspecies hybrid frogs Pelophylax esculentus and one of its parental species Pelophylax ridibundus inhabit the Siversky Donets center of diversity of water frogs in Eastern Ukraine.
A. Fedorova, E. Pustovalova
doaj   +1 more source

EARLY KASIMOVIAN CONIFERS OF THE DONETS BASIN

open access: yesCollection of Scientific Works of the Institute of Geological Sciences of the NAS of Ukraine, 2013
Three conifers foliage species and one ovuliferous cone species are described from the lower Kasimovian of the Donets Basin: Walchia piniformis, Otovicia hypnoides, Culmitzschia angustifolia, Walchiostrobus sp. The plant remains are found in the fi ne sandstone beds below the limestone N15.
Boyarina, N.I., Kovalenko, A.G.
openaire   +3 more sources

Spined Loache Settlements Structure (Cobitidae) of the Eastern Ukraine River Systems and Alternative Character of Diploid and Polyploids Populations.

open access: yesZoodiversity, 2022
The structure of spined loaches diploid-poliploid complex of Cobitis genera representatives as well as Sabanjeewia aurata of the Eastern Ukraine river systems were investigated by allozyme analysis and cytometry.
S. V. Mezhzherin   +3 more
doaj   +1 more source

ANALYSIS OF THE HYDROCHEMICAL COMPOSITION OF MINE WATERS OF THE KRASNOARMIYSK COALMINING DISTRICT OF DONBAS

open access: yesГеохімія техногенезу, 2023
The Krasnoarmiysk geological and industrial district is located in the southwestern part of the Donets basin. The hydrogeological conditions of the research region are complex, which is related to its tectonic features and lithological composition of ...
V.V. Vergelska , V.G. Verkhovtsev
doaj   +1 more source

Coleolus carbonarius Demanet, 1938 (incertae sedis) from the late Bashkirian (Carboniferous) of the Donets Basin, Ukraine

open access: yesGeo&Bio, 2022
Problematic fossils Coleolus carbonarius Demanet, 1938 were described from seven localities of the Mospyne Formation (late Bashkirian, Carboniferous) of the central Donets Basin. Many authors attributed these conoidal fossils to various groups of animals,
Vitaly Dernov
doaj   +1 more source

Rare and vanishing plants in the central basin of the Siversky Donets, their conservation in nature and in culture

open access: yesІнтродукція Рослин, 1999
An analysis of rare flora of Central Basin of the Siversky Donets is presented. The reason of decreasing of some local species and the problems of conservation in situ and ex situ are considered.
Y.V. Minina, M.B. Gaponenko
doaj   +1 more source

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