VARIABILITY OF THE GROUND MOLLUSK SHELL

The variability of conchiological characters of the shell of the terrestrial mollusk Chondrula tridens (Müller 1774) from 4 different types of landscapes of the Ulyanovsk region was studied. Analysis of elementary characters, proportions and wellhead armament of shell structures demonstrates a significant heterogeneity of the species. The large size of the shell of the snails is explained by an increase in the growth period due to an increase in temperature and humidity in the conditions of the north-western and southern landscapes of the Ulyanovsk region, as well as in the urbanized environment. Reducing the height of the shell, increasing roundness and better development of the mouth teeth of mollusks living in the chalk steppe reflects their adaptability to the conditions of more xerothermic landscapes, and also determines the position of the shell in space.

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Distribution Patterns of Grasshoppers and Their Kin in the Boreal Zone

Psyche A Journal of Entomology ◽

10.1155/2011/324130 ◽

2011 ◽

Vol 2011 ◽

pp. 1-9 ◽

Cited By ~ 5

Author(s):

Michael G. Sergeev

Keyword(s):

North America ◽

Distribution Patterns ◽

Monotypic Genus ◽

Boreal Zone ◽

Flood Plains ◽

The North ◽

Mountain Steppes ◽

Different Types ◽

Low Levels ◽

North Western

The distribution patterns of Orthoptera are described for the boreal zone. The boreal fauna of Eurasia includes more than 81 species. Many of them are widely distributed. The monotypic genusParacyphoderrisStorozhenko and at least 13 species are endemics or subendemics. About 50 species are known from boreal North America. Four endemic species are distributed very locally. Relationships between the faunas of the Eurasian and North American parts of the boreal zone are relatively weak. The boreal assemblages are usually characterized by the low levels of species diversity and abundance. Grasshoppers and their relatives occupy almost exclusively open habitats, such as different types of meadows, mountain steppes and tundras, clearings, openings, bogs, and stony flood plains. The local endemics and subendemics are found only in some habitats of the eastern part of Eurasia and the north-western part of North America. Retrospective and prospective of the boreal fauna of Orthoptera are also discussed.

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Soil microbiome from postmining ecosystems from Kabardino-Balkaria, Russia

10.5194/egusphere-egu21-2100 ◽

2021 ◽

Author(s):

Grigory Gladkov ◽

Anastasiia Kimeklis ◽

Rustam Tembotov ◽

Arina Kichko ◽

Evgeny Andronov ◽

...

Keyword(s):

Soil Types ◽

Soil Microbiome ◽

Soil Restoration ◽

Significant Heterogeneity ◽

Control Points ◽

Meadow Soil ◽

North Caucasus ◽

The North ◽

Gene Libraries ◽

Different Types

The soil microbiome is critical to the restoration of soils , destroyed by human activity. The dynamics of changes in the soil microbiome was investigated from the two overgrown gravel-sand quarry dumps in the North Caucasus (Kabardino-Balkaria, Russia). Samples were taken in the quarries of contrasting soil types (Calcareous Chernozem and Umbric Gleyic soils) under the various types of reclamation. Samples were taken from 10 points from a quarry with meadow soil and from 11 points from the Chernozem. The 16S ssu gene libraries were sequenced from soil DNA.The difference in microbiomes between the control points and the points where the soil is restored was statistically significant. The disturbed Gleyic soil is characterized by an increase in the representatives of Acidobacteria, for Chernozem of the genera Niastella, Ramlibacter, Microvirga. On the Umbric&#160; Gleyic soil without reclamation, significant heterogeneity was shown, in contrast to Chernozem with different types of reclamation. In different soil types, the response of the soil microbiome to soil restoration was significantly different, which in turn should influence the choice of the strategy for the restoration of anthropogenically diturbed soils.

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Role of multifractal analysis in understanding the preparation zone for large size earthquake in the North-Western Himalaya region

Nonlinear Processes in Geophysics ◽

10.5194/npg-18-111-2011 ◽

2011 ◽

Vol 18 (1) ◽

pp. 111-118 ◽

Cited By ~ 21

Author(s):

S. S. Teotia ◽

D. Kumar

Keyword(s):

Western Himalaya ◽

B Value ◽

Great Earthquake ◽

Kashmir Earthquake ◽

The North ◽

Large Size ◽

Time Period ◽

Spatio Temporal ◽

Self Organised Criticality ◽

North Western

Abstract. Seismicity has power law in space, time and magnitude distributions and same is expressed by the fractal dimension D, Omori's exponent p and b-value. The spatio-temporal patterns of epicenters have heterogeneous characteristics. As the crust gets self-organised into critical state, the spatio-temporal clustering of epicenters emerges to heterogeneous nature of seismicity. To understand the heterogeneous characteristics of seismicity in a region, multifractal studies hold promise to characterise the dynamics of region. Multifractal study is done on seismicity data of the North-Western Himalaya region which mainly involve seismogenic region of 1905 Kangra great earthquake in the North-Western Himalaya region. The seismicity data obtained from USGS catalogue for time period 1973–2009 has been analysed for the region which includes the October 2005 Muzafrabad-Kashmir earthquake (Mw =7.6). Significant changes have been observed in generalised dimension Dq, Dq spectra and b-value. The significant temporal changes in generalised dimension Dq, b-value and Dq−q spectra prior to occurrence of Muzaffrabad-Kashmir earthquake relates to distribution of epicenters in the region. The decrease in generalised dimension and b-value observed in our study show the relationship with the clustering of seismicity as is expected in self-organised criticality behaviour of earthquake occurrences. Such study may become important in understanding the preparation zone of large and great size earthquake in various tectonic regions.

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Microscopic algae of some lakes of the North-Western Black Sea coast (Ukraine)

Algologia ◽

10.15407/alg30.04.382 ◽

2020 ◽

Vol 30 (4) ◽

pp. 382-392

Author(s):

V.P. Gerasimiuk ◽

Keyword(s):

New Species ◽

Black Sea ◽

New Record ◽

Freshwater Species ◽

The North ◽

Black Sea Coast ◽

Solid Substrates ◽

Different Types ◽

North Western ◽

Sea Coast

Paper summarizes information on the diversity of microscopic algae of 10 lakes of the north-western Black Sea coast (Bile, Kahul, Kartal, Katlabukh, Kytai, Pysarske, Sasyk, Safyany and Yalpug). A total of 339 species belonging to 135 genera, 62 families, 30 orders, 10 classes, 7 divisions were identified. The richest divisions were Bacillariophyta (198) and Chlorophyta (62) and Cyanophyta (40). Representatives of Euglenophyta (18), Charophyta (15), Ochrophyta (5) and Dinophyta (1) were less diverse. In the studied lakes, 13 new species were found for the Danube lakes and four species are first cited for the water bodies of the North-Western Black Sea Coast and the territory of Ukraine. Among them Pinnularia fonticola Hustedt is new record to Europe. Genera Nitzschia Hassall (26), Navicula Bory (15), Сymbella C.Agardh (9), Tryblionella W.Sm. (9), Desmodesmus (F.Chodat) An, Friedl et E.Hegew.(9), Caloneis Cleve (8), Gomphonema (C.Agardh) Ehrenb. (8), Euglena Ehrenb. (7), Cosmarium Corda et Ralfs (7) and Oscillatoria Vaucher ex Gomont (7) formed the basis of the species composition of algae in studied lakes. Morphologically, 189 species are unicellular, 119 colonial and 31 multicellular algae. Of these, 157 species are known as motile and 182 as immotile forms. On different types of substrates different numbers of microalgae species were identified. 148 species grew epiphytically on macrophytes; on solid substrates, 42 species were revealed on concrete and 38 on stones. On the bottom, 110 species were found on silt and 41 on sand. In relation to the level of water mineralization in the lakes freshwater species dominated (281). They include 221 species of indifferents, 58 halophiles and 2 halophobes. Mesohalobes were represented by 52 species, six species are marine (polyhalobes). Lakes Yalpug (198 species), Kugurluy (198) and Katlabukh (192) were the richest in microalgae species.

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