Drinkable waters in Bryansk oblast are generally poor in I and Se. Possible I and Se speciation in the drinkable waters and their means of migration and concentration in soils at geochemically ...contrasting conditions are analyzed, and the possible reason for the high mobility of I is demonstrated to be predetermined not only by its occurrence in the form of iodide and organic complexes but also by solute mineral species (CaI
+
and MgI
+
), with the former and the latter types of the complexes spread more widely in the polessky and opolny landscape types, respectively. Iodine complexation with alkali-earth cations under reduced neutral-weakly alkaline conditions facilitates, on the one hand, vertical iodine migration and, on the other hand, its precipitation on the carbonate barrier. The predominant solute species of Se in these environments is hydroselenide, which can form FeSe in the presence of significant Fe concentrations and be precipitated on the reduced barrier in soils of hydromorphic landscapes. The generally low total I and Se concentrations in the drinkable waters and the migration of solute compounds of radioactive I in the form of organic and inorganic complexes could likely result in a higher thyroid morbidity rate over the whole territory of Bryansk oblast, including areas contaminated with radioactive I isotopes after the accident at the Chernobyl nuclear power plant.
Rose's and Mishler and Rose's ‘hourglass’ construction of post-Soviet Russian society illustrates that the civil space traditionally occupied by advocacy and community groups continues to be ...constricted. Such groups fail to successfully bridge the space between the individual and the state, thereby holding the fledgling Russian democracy to account. In this paper, to shed light on reasons for the continuing constriction of Russian civil space, the behavior of the environmental movement in one Russian region — Samara Oblast — is observed through the lens of social capital. By utilizing Adler and Kwon's schema for assessing the benefits and risks arising from social capital stocks possessed by collectives, it will illustrate that the Russian environmental movement is inward looking and parochial; built on pre-existing friendships or elite connections; and uninterested in forming a mass movement or actively engaging with the Russian public. Moreover, rather than being situated within the constricted civil space of Russian society, the majority of groups within the Samara environmental movement are themselves situated firmly in either half of the hourglass. Groups within each half successfully span gaps between each other, but no activity is undertaken to bridge or reshape the constricted space between the halves.
Spectra of the REE distribution in the Quaternary–Recent peat bog ore of southern Karelia and Leningrad region are characterized by La
N
/Yb
N
< 1.0, presence of positive Eu and negative Ce ...anomalies, and higher Y enrichment (relative to Ho and Dy) because of the REE sorption by Fe-bearing minerals in acid boggy waters. The
87
Sr/
86
Sr ratio is 0.7175 in iron oxyhydroxides of the Somino deposit (Leningrad region) and 0.7283 in the Polovinkino ore (southern Karelia). The
143
Nd/
144
Nd ratio in them is 0.511844 and 0.511617, respectively.
An updated version of the Devonian stratigraphical chart of Estonia with comments is presented. Estonian regional stratigraphical units are correlated with the standard conodont zonation and miospore ...zonation, used in the western part of the East European Platform. The fossil fish zonations, largely accepted in the Main Devonian Field, are discussed. Differences in the position of series and stage boundaries and age determination of regional units in the Baltic area, Belarus and NW Russia are dealt with. Two key markers for the correlation of the Middle Devonian of the Baltic area and Scotland, based mainly on placoderms, are described. Special attention is paid to occurrences of inarticulate brachiopods and finds of rare articulate brachiopods in siliciclastic rocks of the Baltic area, indicating their marine origin.
Findings of some orchid species in various types of anthropogenic habitats (forest plantations, embankments, urbanized areas, etc.) in Saratov oblast are reported. Of special interest is the ...occurrence in such habitats of species included in the 2008 Red Book of the Russian Federation, namely,
Cephalanthera rubra
(L.) Rich.,
Cephalanthera longifolia
(Huds.) Fritsch., and
Orchis militaris
L.
The modern distribution of
Peganum harmala
(
Peganum harmala
L.) in the environs of Lake Baskunchak (including the Bogdinsko–Baskunchakskiy Nature Reserve), where the species has been found for the ...first time, is shown. The distribution trends of the species and its indicator role in assessing the state of natural ecosystems in the area under study are discussed.
This monograph deals with the morphology of bryozoans of the orders Cystoporida and Trepostomida from the Latorp and Volkhov horizons (Lower-Middle Ordovician, Floian-Darriwilian stages) of the ...Leningrad Region. Diagnoses of some families belonging to these orders are revised. Based on morphological features of the bryozoans studied and on the succession of their taxa, four assemblages and three stages in their development are established. In addition, the stratigraphic and paleogeographic distributional patterns of bryozoans in the Lower and Middle Ordovician of the world are analyzed.
The early ontogeny of Palaeozoic Craniiformea (Brachiopoda) remains controversial, with conflicting reports of evidence indicating lecithotrophic versus planktotrophic larval stages. Further ...compelling evidence for lecithotrophy in Palaeozoic craniiforms is described here. Newly obtained, well-preserved Silurian specimens of craniiforms, including Craniops (Craniopsida), and Lepidocrania? and Orthisocrania (Craniida) from Gotland and the St. Petersburg region, form the basis for this study. The new material demonstrates that the characters of shell structure and shell formation provide evidence of early differentiation of an adult dorsal mantle, and the presence of a distinctive primary layer with a characteristic lath-like pattern indicates that these craniiforms underwent a lecithotrophic larval stage, more or less identical to that of living.
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