Ecological and geographical regularities of changes in the biological activity of automorphic soils on the foothills and adjacent plains of the Central Caucasus region (Kabardino-Balkarian Republic)

Gorobtsova, O. N.; Хежева, Ф. В.; Uligova, T. S.; Tembotov, Rustam

doi:10.1134/s106422931501007x

Cited by 6 publications

(3 citation statements)

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“…Evidently, for Chernozems calcaric and Chernozems calcaric residual-meadow soils in variants with different orography and climatic conditions, the location affects the spatial variation level of biological properties. It should be noted that, as estimated by the complex of studied biological parameters, Haplic Chernozems Pacnic soils show lower values in intensity of biological processes than other Chernozem subtypes in the steppe zone of Kabardino-Balkaria (Gedgafova, Uligova, Gorobtsova, and Tembotov, 2015;Gorobtsova, Khezheva, Uligova, and Tembotov, 2015).…”

Section: Bromus Mollismentioning

confidence: 95%

“…The main areas of Haplic Chernozems Pacnic soils within Kabardino-Balkaria are in agricultural use, and natural ecosystems with characteristic species composition of vegetation and soil mesofauna were preserved only in small areas. Ecological and biological studies in the area of Haplic Chernozems Pacnic soils make it possible to characterize the current state of the basic components of natural ecosystems and represent research continuation as part of developing methods to conduct ecological assessment of the soils within the Central Caucasus (Gedgafova, Uligova, Gorobtsova, and Tembotov, 2015;Gorobtsova, Khezheva, Uligova, and Tembotov, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Ecological and biological studies in the haplic chernozems pacnic soils area in the Central Caucasus (Kabardino-Balkaria)

Uligova¹,

Gorobtsova²,

Tsepkova³

et al. 2017

BioComm

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The northern macroslope of the Central Caucasus and adjacent areas of the Middle Ciscaucasia belong to the Northeast Caucasian (semi-desert) type of vertical zonation. This type, which includes terskiy and elbrusskiy variants of vertical zonation, differs from the Northwest Caucasian vertical zonation by general xerophytization of landscapes. The Haplic Chernozems Pacnic soils of Kabardino-Balkaria formed within steppe zone of mentioned variants are almost entirely involved in agricultural use; natural ecosystems with characteristic species composition of natural vegetation and mesofauna were preserved only in small areas inconvenient for arable activity. Characteristics of the current ecological-biological state of the steppe ecosystem components from the Haplic Chernozems soils area (soil -vegetation -earthworms) is given. The values of synecological indices (Shannon's, Simpson's, Pielou's, Hartley's, and integral) characterize high floristic and phytocenosis diversity, and synantropization indices correspond to average levels. Earthworms are in abundance and represent the largest part of the mass of soil organisms in species composition, which corresponds to steppe zonal conditions and testifies to the dominance of the saprotrophic complex. The correlation and factor analysis by the principal components method shows wide ranges of interdependence in functioning of ecosystems components: between diversity of biotic communities and biological properties (humus content, microbial biomass carbon contents (C mic ), intensity of microbial respiration, enzymatic activity) and physicochemical properties (pH of soil solution, field moisture, soil density) of Haplic Chernozems.

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Section: Bromus Mollismentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Ecological and biological studies in the haplic chernozems pacnic soils area in the Central Caucasus (Kabardino-Balkaria)

Uligova¹,

Gorobtsova²,

Tsepkova³

et al. 2017

BioComm

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“…Many components of organic matter are energy-rich substrates for soil organisms, and this promotes microbiological activity and, in turn, soil enzyme activity [35,45]. The activity of soil enzymes can be an additional diagnostic index of soil fertility along with its changes resulting of anthropogenic impact [6,7,9,33,38,41,42]. Enzyme…”

Section: Introductionmentioning

confidence: 99%

Postagrogenic Changes in the Enzyme Activity and Organic Carbon Content in Chernozem during the First Three Years of Fallow Regime

et al. 2020

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Comprehensive studies of the biological status of ordinary chernozem (Haplic Chernozem (Loamic)) were carried out in the early years of the fallow regime in comparison with its arable analogue, old fallow, and the reference virgin steppe soils. They included a field experiment on the conversion of an oldarable plot with the ordinary chernozem in Botanical Garden of the Southern Federal University to a fallow. In this experiment, organic carbon and the activity of two classes of enzymes, oxidoreductases (catalases and dehydrogenases) and hydrolases (β-fructofuranosidase) were compared for soils under land-use variants. The organic carbon content in the soil of the young fallow increased already in the first year; it did not change significantly in subsequent years of plant cover restoration, and varied depending on the observation period during the growing season. The activity of the enzymes also increased in the first year of the fallow regime and continued to restore throughout the time after the cessation of agricultural use. The catalase activity in the young fallow soil was 9% higher (p < 0.05) than in the first year of research, the activity of dehydrogenases increased by 20% (p < 0.05), and β-fructofuranosidase by 10% (p < 0.05). However, the enzymatic activity was significantly lower than in the case of old fallow and, especially, of the reference soil in the virgin steppe.

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The characteristics of a relic steppe of Northeast Asia: refuges of the Pleistocene Mammoth steppe (an example from the Lower Kolyma area)

Щелчкова

Davydov

Fyodorov-Davydov

et al. 2020

IOP Conf. Ser.: Earth Environ. Sci.

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An ecosystem of a relic petrophytic steppe was studied in the Lower Kolyma River region. The soils of the steppe area significantly differed from those of the surrounding open larch forests in the following features: the presence of humus-accumulative horizons with a high content of roots; low moisture content; high heat supply; an extremely contrasting temperature regime; neutral reaction; decreased potential acidity; higher humification of organic matter; accumulation of exchangeable bases, soluble salts and organic nitrogen; and the presence of carbonate neoformations in the form of cutans on pebbly units. They also had a high microorganism saturation of the soil profile, a high share of actinomycetes in the microbial community, as is typical for arid soils, and a shift in the ratio of potential enzyme activities toward oxidoreductases, which reflects a deeper destruction of plant residues and more intensive humus formation. The petrophytic steppe had high bioproductivity. The growth rate of the aboveground phytomass (ANP) was closer to the true steppes of Central Asia than to the zonal tundras of the Arctic and Subarctic; such communities can serve as models for paleoreconstructions and study of the Late Pleistocene cold steppes - mammoth fauna large grazing mammals habitats.

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Ecological and geographical regularities of changes in the biological activity of automorphic soils on the foothills and adjacent plains of the Central Caucasus region (Kabardino-Balkarian Republic)

Cited by 6 publications

References 1 publication

Ecological and biological studies in the haplic chernozems pacnic soils area in the Central Caucasus (Kabardino-Balkaria)

Ecological and biological studies in the haplic chernozems pacnic soils area in the Central Caucasus (Kabardino-Balkaria)

Postagrogenic Changes in the Enzyme Activity and Organic Carbon Content in Chernozem during the First Three Years of Fallow Regime

The characteristics of a relic steppe of Northeast Asia: refuges of the Pleistocene Mammoth steppe (an example from the Lower Kolyma area)

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