Evenness of species abundance in the littoral communities of the Murman

2021 ◽  
pp. 38-45
Author(s):  
Svetlana V. Malavenda
Keyword(s):  
Species Diversity ◽  
Abiotic Factors ◽  
Species Abundance ◽  
Species Structure ◽  
Substrate Type ◽  
Soil Features ◽  
The North ◽  
Structure Of Communities ◽  
North Eastern ◽  
Eastern Border

The spatial and species structure of fucus algae communities in littoral phytocenoses of Eastern Murmansk is studied. This is the North-Eastern border of Fucus communities. 87 species of macrophyte algae were identified in the communities. The variation of species diversity as an indicator of community structure is determined depending on the leading abiotic factors – salinity, surf content, and substrate type. The species diversity of macrophyte algae in the littoral of the Eastern Murmansk is determined primarily by surf activity. Under similar hydrological conditions, soil features determine the density of thickets and, consequently, the number of species found in a single sample. Salinity fluctuations at which it drops below 15‰ are critical for most species and fundamentally change the structure of communities. The highest values of the indices of species diversity were observed in the littoral areas of the coast that are poorly protected from the surf.

THE POVERTY REDUCTION SOLUTIONS FOR ETHNIC MINORITIES IN THE NORTH EASTERN BORDER AREA USING THE MARKET ACCESS

2018 ◽  
Author(s):  
Phi Hung Cuong ◽  
Vu Van Anh
Keyword(s):  
Ethnic Minorities ◽  
Poverty Reduction ◽  
Market Access ◽  
Poverty Rate ◽  
Living Standards ◽  
Mountainous Areas ◽  
Important Indicator ◽  
The North ◽  
North Eastern ◽  
Eastern Border

Income is an important indicator for assessing the level of economy development as well as identifying and assessing living standards. The population in Northeast border is poor, facilities are outdated, people’s life is difficult, but it hold great potentials for economic development. However, the region’s biggest challenge today is low living standards and high poverty rate. Differences in income and living standards across regions and strata tend to increase the gap. The sustainability of the trend of income increase and improvement of living standards of the population is not stable. As a result, the development of mountainous areas is dependent on poverty reduction solutions for ethnic minorities through the increase of incomes and improvement of market connectivity for ethnic minorities in mountainous areas.

scholarly journals Białowieża Forest (Ne-Poland) and Valday Np ( Nw-Russia) – Biogeographical Characteristics of Eutrophic Deciduous Forests

2014 ◽  
Vol 33 (3) ◽  
pp. 111-122 ◽  
Author(s):  
Jan Marek Matuszkiewicz ◽  
Elena Bielonowska ◽  
Anna Kowalska ◽  
Nadjeżda Cariewska ◽  
Jarosław Baranowski ◽  
...  
Keyword(s):  
National Park ◽  
Deciduous Forest ◽  
Deciduous Forests ◽  
Anthropogenic Pressure ◽  
The Past ◽  
The North ◽  
Ne Poland ◽  
North Eastern ◽  
Białowieża National Park ◽  
Eastern Border

Abstract During geobotanical studies in the north-eastern border of hemi-boreal zone, in Valday (NW Russia), rare eutrophic deciduous forests dominated by oak Quercus robur were observed. A comparison of these forests with the model of European deciduous forest in Białowieża National Park (NE-Poland) indicates a great similarity. Therefore, eutrophic deciduous forests in Valday can be classified to the Querco-Fagetea class, the Fagetalia sylvaticae order and to the Capinion betuli alliance, despite the absence of hornbeam Carpinus betulus in the region. Rarity of eutrophic deciduous forests in Valday region results probably from strong anthropogenic pressure in the past.

Transgressive Upper Eocene in Palestine

1943 ◽  
Vol 80 (3) ◽  
pp. 107-110
Author(s):  
M. Avnimelech
Keyword(s):  
Middle Eocene ◽  
Upper Eocene ◽  
The North ◽  
Upper Oligocene ◽  
North Eastern ◽  
Eastern Border

Several years ago I wrote a number of papers on the results of my investigations in a synclinal area near Megiddo, south-east of Mount Carmel, which I called “ the syncline of Megiddo ”. In the thick Eocene series of this syncline two distinct horizons of Lower and Upper Lutetian have been recognized. Above the Lutetian beds some patches of transgressive Upper Oligocene are preserved. Unfortunately the publications were based on investigations of only the north-eastern border of the whole synclinal region, further field explorations having been made impossible by the riots in 1936−39. In the summer of 1942 I renewed my fieldwork, which has led to a discovery of an Upper Eocene transgression over a probable Middle Eocene series.

Ecology of Leuctra geniculata (Plecoptera: Leuctridae), an atlantomediterranean species on the north-eastern border of its area

Biologia ◽  
2008 ◽  
Vol 63 (4) ◽  
Author(s):  
Petr Pařil ◽  
Jindřiška Bojková ◽  
Jan Špaček ◽  
Jan Helešic
Keyword(s):  
Czech Republic ◽  
Life Cycle ◽  
Morphological Characters ◽  
The Czech Republic ◽  
Macroinvertebrate Assemblages ◽  
Ecological Preferences ◽  
The North ◽  
North Eastern ◽  
Ept Taxa ◽  
Eastern Border

AbstractThe first records of Leuctra geniculata Stephens, 1836 in the north-eastern border of its area (the Czech Republic) are presented and an overview of references, synonyms and distribution of the species is given. The ecological preferences of the species, supported by chemical and hydromorphological parameters, are defined. Probable dissemination paths into the Czech Republic and the supposed life cycle of the species are discussed. Photographs of morphological characters, SEM photos of eggs, associated macroinvertebrate assemblages (EPT taxa) and maps of distribution are included.

scholarly journals Ecology-faunistic analysis of blackflies (DIPTERA, SIMULIIDAE) of hydrobiocenesis on the north-eastern macroslope of the Ukrainian Carpathians

2019 ◽  
Vol 77 (1) ◽  
pp. 32-38
Author(s):  
A. Tepliuk ◽  
T. Tepliuk
Keyword(s):  
Species Diversity ◽  
Diversity Index ◽  
Similarity Index ◽  
Common Species ◽  
Beech Forests ◽  
Species Diversity Index ◽  
Quantitative Correlation ◽  
The North ◽  
Plant Groups ◽  
North Eastern

It has been installed that the species richness of the blackflies of the north-eastern macroslope of the Ukrainian Carpathians counts 38 species of 2 genera: Prosimulium Roubaud, 1906 (2 species) and Simulium Latreille, 1802 (36 species). 20 species develop in the streams (Simpson's species diversity index (Іs) equals to 0,22), and 26 species develop in the rivers (Іs – 0,10). There are 8 common species of Simuliidae for both types of watercourses (similarity index by Czekanowski/Sørensen (І) is 0,26). 12 species of blackflies develop only in the streams, and 18 species develop only in the rivers. S. trifasciatum Curtis, 1839, S. reptanoides Carlsson, 1962, S. ornatum Meigen, 1818 and S. intermedium Roubaud, 1906 dominate in the hydrobiocenoses of the north-eastern macroslope of the Ukrainian Carpathians. S. trifasciatum and S. ornatum are widespread. It has been discovered that Simuliidae fauna of main altitudinal zonal plant groups of the region differs in composition and quantitative correlation of species. S. intermedium, S. ornatum, S. reptans Linnaeus, 1758 and S. trifasciatum are eurytopic. In the hydrobiocenoses of the district of beech forests has been registered 31 species (Is – 0.09), and in the watercourses of the district of spruce mountain Carpathian forests has been registered 24 species (Is – 0.18). It has been found out that with the decrease of height in the district of the beech forests, the value of Simpson's species diversity index decreases from 0.16 (20 species) in the subdistrict of the dark-coniferous-beech watershed forests to 0.11 (21 species) in the subdistrict of fir-beech and beech-fir precarpathian forests.

scholarly journals Three-Part Appliques from Medieval Complexes of Lower Angara Region

2021 ◽  
Vol 33 (2) ◽  
pp. 110-126
Author(s):  
Maksakova D. ◽  
◽  
Senotrusova P. ◽  
Keyword(s):  
Middle Ages ◽  
Archaeological Sites ◽  
Northern Eurasia ◽  
13Th Century ◽  
Visual Research ◽  
The North ◽  
North Eastern ◽  
Eastern Border ◽  
Manufacturing Techniques ◽  
The Moment

The present paper investigates three-part appliques from the ensemble of archaeological sites of Shivera Prospikhino, which was located in the Lower Angara region. The variants of this type of jewelry have been indicated, and their territorial distribution in the region and Northern Eurasia have been determined. The chronological frame of the extent of appliques during the research archaeological complex is presented. The highest diversity of variants of appliques are recorded in the burials of the 12th — middle 13th century. In the burials of the Mongol period (the 13th –14th century) appliques with a plain shield and items with a drawn line on shield predominate. Jewelry with a convex figured nose, with «pearls’ on the ears and with a drawn line in the center of the shield have not been not marked in the materials of nearby and distant archaeological complexes of Northern Eurasia. The paper puts forward a position on the universal using of three-part appliques. Visual research of the appliques allowed us to record technological traces that reflect the techniques of making jewelry. The characteristic of the recipe of the alloys used has been presented. At the moment, the published materials indicate that the territory of the Lower Angara region is the north-eastern border of the mass distribution of three-part appliques. Keywords: Lower Angara region, High Middle Ages, jewelry, appliques, typology, chronology, manufacturing techniques

scholarly journals Ecological assessment of Eremogone saxatilis (L.) Ikonn habitat on the north-eastern border of the range

2021 ◽  
Vol 20 (1) ◽  
pp. 57-60
Author(s):  
K. D. Belova
Keyword(s):  
Ecological Assessment ◽  
Pine Forests ◽  
Southern Siberia ◽  
The North ◽  
Adaptive Capabilities ◽  
Distribution Features ◽  
North Eastern ◽  
Sandy Forest ◽  
Eastern Border ◽  
Main Factors

Eremogone saxatilis (L.) Ikonn – a Eurasian, boreal-temperate species distributed in the European partof Russia and Southern Siberia. Recently the species occurs in dry pine forests, on the edges, sandy forest glades, inthe steppes. Despite its rather extensive area, this species is specified in the Red Books of different regions of Russia,including the Kirov region. The aim of the research is to study the ecological and coenotic features of the Eremogone saxatilis habitat on the north-eastern border of the range. The research of the species distribution features was carried out inthe protected area “Medvedsky Bor”. On the basis of geobotanical descriptions, the analysis of ecological preferences andrealized ecological potencies of Eremogone saxatilis was carried out, which was realized out according to the amplitudephytoindication scales of D. N. Tsyganov. According to the data obtained, it was found that the studied species does nothave high adaptive capabilities to various environmental conditions. Eremogone saxatilis exists in areas with approximateconditions of its original habitats on the territory of the Kirov region. The main factors for the growth of the species werethe increased illumination and dryness on the poor soils of pine forests in the northern parts of its modern area.

scholarly journals Effect of Diverse Abiotic Conditions on the Structure and Biodiversity of Ichthyofauna in Small, Natural Water Bodies Located on Agricultural Lands

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2674
Author(s):  
Adam Brysiewicz ◽  
Przemysław Czerniejewski ◽  
Małgorzata Bonisławska
Keyword(s):  
Crucian Carp ◽  
Abiotic Factors ◽  
Common Knowledge ◽  
Species Abundance ◽  
Buffer Zone ◽  
Water Bodies ◽  
Agricultural Lands ◽  
Small Water ◽  
The North ◽  
K Concentration

Mid-field natural ponds promote regional biodiversity, providing alternative habitats for many valuable animal species. The study’s objective was to determine the most important abiotic factors, including hydrochemical and morphometric parameters, affecting fish occurrence in natural, small water bodies on agricultural lands. The studies were conducted in nine randomly selected water bodies located in Poland (the North European Plain). Eleven species of fish were recorded in the waterbodies, with the most abundant being cyprinids (mainly crucian carp). Canonical correspondence analysis (CCA) showed that an increase in oxygenation, temperature, amount of macrophytes, and K concentration and a decrease in the concentration of phosphates, electrical conductivity (EC), Mg, and Cl is associated with the most beneficial living conditions for the most frequently occurring species in the studied water bodies—crucian carp and tench. Aside from the hydrochemical parameters of water in the natural ponds, the number of fish correlates with the basin area and the pond area, maximum depth, area of the buffer zone surrounding the water bodies, and the number of macrophytes. This last factor also has a significant influence on the species’ abundance in the water bodies. Fish occurrences in mid-field ponds and common knowledge on their important role in the environment require taking steps to provide fish protection.

The role of mineral nutrients in regulation of phytoplankton community structure of the North-Eastern part of the Black Sea at the end of May 2019

2020 ◽  
pp. 56-65
Author(s):  
Anna V. Lifanchuk ◽  
Alexey V. Fedorov ◽  
Elvina I. Alieva
Keyword(s):  
Large Cell ◽  
The Black Sea ◽  
Species Structure ◽  
Nitrogen And Phosphorus ◽  
The North ◽  
Relative Contribution ◽  
North Eastern ◽  
Low Phosphorus ◽  
Nitrogen Concentrations

The effect of nitrogen and phosphorus additives on the species structure of the natural phytoplankton population at the end of May 2019 was studied. An increase in the concentration of nitrogen and phosphorus in seawater led to a rise in the number of coccolithophores, while the relative contribution of phosphorus was higher. The predominance of small-cell diatoms in the community was facilitated by the simultaneous addition of nitrogen and phosphorus. In contrast, the relative contribution of nitrogen was higher than that of phosphorus. An increase in nitrogen concentrations at relatively low phosphorus concentrations intensified the growth of large-cell diatoms.

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