scholarly journals The Pleistocene-Holocene aquatic molluscs as indicators of the past ecosystem changes in Transbaikalia (Eastern Siberia, Russia)

2020 ◽  
Author(s):  
Olga K. Klishko ◽  
Evgeniy V. Kovychev ◽  
Maxim V. Vinarski ◽  
Arthur E. Bogan ◽  
Georgiy. A. Jurgenson
Keyword(s):  
Regional Climate ◽  
Far East ◽  
Marine Species ◽  
Drill Hole ◽  
Historical Change ◽  
Neolithic Period ◽  
Eastern Siberia ◽  
Alluvial Deposits ◽  
Fossil Species ◽  
The Past

ABSTRACTData on historical change of the Transbaikalian malacofauna in the Neopleistocene and Holocene is presented. Fossil shells from archeological excavations of the ancient settlements dating from the Neolithic period to Medieval and also from a drill hole of the Neopleistocene alluvial deposits were collected. In total nine species of bivalve molluscs from the families Margaritiferidae, Unionidae, Limnocardiidae, Glycymerididae, including one marine species, and two gastropod species from families Viviparidae and Planorbidae were identified. The time of the existence of each fossil species was determined by radiocarbon dating. It was found that the species ranged in age from more 50,000 and 2,080–1,210 years ago. Five species inhabited the Transbaikal region and are locally extirpated in the present. Their disjunctive ranges in the past included southern Europe and Western and Eastern Siberia to Transbaikalia and in the east to Far East and Primorye of Russia. The time of existence and extirpation of the thermophilic species of genera Adacna, Planorbis, Lanceolaria and Amuropaludina corresponds to cycles of the warming and cooling in Pleistocene and Holocene according to regional climate chronological scales. It was possible to separate these species as indicators of paleoclimate. Change of the species composition of the malacofauna of region connected with natural cycles of climatochrons in the Pleistocene and Holocene is the appearance of the climatogenic succession. In the course of this succession the disappearance of the stenothermal species occurred on a regional level and decreasing their global ranges.

Progress in the discovery of extant and fossil bryozoans

2020 ◽  
Vol 635 ◽  
pp. 71-79 ◽  
Author(s):  
M Pagès-Escolà ◽  
PE Bock ◽  
DP Gordon ◽  
S Wilson ◽  
C Linares ◽  
...  
Keyword(s):  
New Species ◽  
Marine Invertebrates ◽  
Marine Species ◽  
Past Century ◽  
Fossil Species ◽  
The Past ◽  
Extant Species ◽  
Technological Developments ◽  
Relative Productivity ◽  
Species Descriptions

The number of species that exist on Earth has been an intriguing question in ecology and evolution. For marine species, previous works have analysed trends in the discovery of extant species, without comparison to the fossil record. Here, we compared the rate of description between extant and fossil species of the same group of marine invertebrates, Bryozoa. There are nearly 3 times as many described fossil species as there are extant species. This indicates that current biodiversity represents only a small proportion of Earth’s past biodiversity, at least for Bryozoa. Despite these differences, our results showed similar trends in the description of new species between extant and fossil groups. There has been an increase in taxonomic effort during the past century, characterized by an increase in the number of taxonomists, but no change in their relative productivity (i.e. similar proportions of authors described most species). The 20th century had the most species described per author, reflecting increased effort in exploration and technological developments. Despite this progress, future projections in the discovery of bryozoan species predict that around 10 and 20% more fossil and extant species than named species, respectively, will be discovered by 2100, representing 2430 and 1350 more fossil and extant species, respectively. This highlights the continued need for both new species descriptions and taxonomic revisions, as well as ecological and biogeographical research, to better understand the biodiversity of Bryozoa.

Ruling out Change: Institutional Impediments to Transfer of Technology in Ship Building and Design in the Far East

Itinerario ◽  
1995 ◽  
Vol 19 (3) ◽  
pp. 142-152
Author(s):  
Bao Leshi
Keyword(s):  
Coastal Waters ◽  
Building Materials ◽  
Far East ◽  
Local Conditions ◽  
Ship Building ◽  
The Past ◽  
Transfer Of Technology ◽  
Construction Techniques ◽  
Different Types ◽  
Technological Tradition

In the Chinese technological tradition, no sector, apart from that of agriculture, is as rich in original ideas as naval architecture. Over the past three millennia, hundreds of different types of craft have been developed for use on China's shallow lakes, on its fast flowing rivers and along its often stormy coastal waters. Each type was developed for specific use as a means of transportation, and would seem to represent the ultimate answer to the challenges posed by local conditions. Ultimate answer, that is, within the limitations of the traditional building materials with which these boats were constructed and fitted out. Nor was ingenuity confined to construction techniques.

scholarly journals MOLECULAR EPIDEMIOLOGY OF TUBERCULOSIS IN EASTERN SIBERIA AND FAR EAST

2019 ◽  
Vol 8 (4) ◽  
pp. 586
Author(s):  
S. N. Zhdanova ◽  
M. K. Vinikurova ◽  
A. A. Yakovlev ◽  
O. B. Ogarkov
Keyword(s):  
Molecular Epidemiology ◽  
Far East ◽  
Eastern Siberia

.

scholarly journals Features of regional investment project in gold industry

2019 ◽  
pp. 19-21
Author(s):  
Olga Nikolaevna Verkholantseva
Keyword(s):  
Russian Federation ◽  
Far East ◽  
Investment Project ◽  
Eastern Siberia ◽  
Regional Investment ◽  
Gold Industry

The article is devoted to the implementation of regional investment project (RIP) in the territories of Eastern Siberia, Zabaykalsky Krai and Far East. The article analyzes the specific of RIP implementation in gold industry in defined Russian Federation subjects. The possible ways of revealed problems solution are defined.

The tale of the headless turtle

Zootaxa ◽  
2016 ◽  
Vol 4200 (2) ◽  
pp. 327 ◽  
Author(s):  
PEDRO S. R. ROMANO
Keyword(s):  
New Species ◽  
Phenotypic Plasticity ◽  
Lower Cretaceous ◽  
Fossil Record ◽  
Diagnostic Features ◽  
Fossil Species ◽  
The Past ◽  
Early Paleocene ◽  
Phylogenetic Hypotheses ◽  
A New Species

Pelomedusoides is the most diverse clade of side-necked turtles and there is an extensive fossil record (de Broin, 1988; Lapparent de Broin, 2000; Gaffney et al., 2006, 2011) that dates back at least to the Barremian (Lower Cretaceous) (Romano et al., 2014). Its large fossil record evidences a greater diversity in the past, particularly at the end of the Mesozoic, and exhibits a good sampling of species that are represented by skull material (Gaffney et al., 2006, 2011). As a consequence, the most complete and recent phylogenetic hypotheses for this clade (e.g. Romano et al., 2014; Cadena, 2015) are based on matrices comprising a great amount of cranial characters derived largely from Gaffney et al. (2006, 2011). In addition, it is well established that shell characters show a lot of phenotypic plasticity, even in the fossil species (Romano, 2008; Gaffney et al., 2006, 2011). In most cases it consequently is not justified to rely on “diagnostic features” of poorly informative shell-only material for describing a new species. Because of that, most authors remark new morphotypes in the literature when such aberrant specimens are recovered, but do not make any nomenclatural act by proposing a new yet poorly supported species (e.g. Romano et al., 2013; Ferreira & Langer, 2013; Menegazzo et al., 2015). Unfortunately, such a supposedly new bothremydid turtle (Pleurodira: Bothremydidae) from the Early Paleocene of Brazil was recently described based on poorly diagnostic remains (Carvalho et al., 2016; hereafter CGB, for the authors initials) and a correction of this unfounded nomenclatural act is required. In addition I present some comments on shell only material from Brazil in order to guide splitter-taxonomists to stop describing poorly preserved fossil specimens as new species. 

Ips subelongatus. [Distribution map].

2008 ◽  
Author(s):  
Keyword(s):  
Geographical Distribution ◽  
Western Siberia ◽  
Far East ◽  
Eastern Siberia ◽  
Distribution Map ◽  
Northern Russia ◽  
Ips Subelongatus ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Ips subelongatus (Motschulsky). Coleoptera: Scolytidae. Hosts: Abies, Larix, Picea and Pinus species. Information is given on the geographical distribution in Europe (Finland, Eastern Siberia, Far East Northern Russia, and Western Siberia) and Asia (Heilongjiang, Jilin, Liaoning and Nei Menggu, China; Hokkaido and Honshu, Japan; Korea Democratic People's Republic; Korea Republic; and Mongolia).

REGIONS SPATIAL DEVELOPMENT PROBLEMS OF EASTERN SIBERIA SOUTH: OPINION OF RESIDENTS

2021 ◽  
pp. 66-82
Author(s):  
Maksim V. Fomin ◽  
◽  
Nikolai Y. Mikryukov ◽  
Timur R. Miriazov ◽  
Oleg O. Smirnov ◽  
...  
Keyword(s):  
Adult Population ◽  
Russian Far East ◽  
Far East ◽  
Social Situation ◽  
Total Sample ◽  
Spatial Development ◽  
Economic Situation ◽  
Eastern Siberia ◽  
Settlement System ◽  
Sociological Study

The article deals with the actual problems of spatial development of the regions of Eastern Siberia south. The results of a sociological study in the republics of Buryatia, Tyva, Khakassia and Zabaykalsky Krai, conducted in September-October 2021, are analyzed. The sample is based on a model, using key characteristics of the general population, based on the principles of quota-proportional and territorial methods. The total sample size is 467 respondents. The empirical object of the study is the adult population of the regions. The social situation of the population of Eastern Siberia south, migration attitudes and attitudes towards labor migrants from abroad, assessments of the economic situation and the dynamics of the development of key enterprises in four regions are considered. The opinions, assessments and comments of local residents on the demographic and migration situation, the main socio-economic indicators of regional development are given. The socio-demographic and socio-economic situation in Eastern Siberia as a whole is compared. The study was carried out under the RFBR project “Modeling scenarios of spatial development of Siberia and the Russian Far East until 2030: features of the settlement system”. The main goal is to assess the current state of the settlement system, develop strategic prospects and model variant scenarios for the spatial development of the regions of the Siberian and Far Eastern Federal Districts. Based on the results of the study, conclusions are given and recommendations are offered.

Sign in / Sign up

Export Citation Format

Share Document