Ecological characteristics of the Microflora development in the forest cryogenic soils in the north of Central Siberia

Sorokin, N. D.; Евграфова, Светлана; Grodnitskaya, I. D.; Bogorodskaya, A. V.

doi:10.1134/s1995425508060064

Cited by 3 publications

(7 citation statements)

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“…As shown by several authors, the development of microorganisms and the rate of the microbiological processes in the active soil layer above the permafrost table are often closely similar to those in the soils of regions with a temperate climate [24,28,29,32,33,45]. The pool of microorganisms in tundra and forest tundra soils can increase significantly under condi tions favoring the development of the microbiological processes [22,29].…”

Section: Resultsmentioning

confidence: 98%

“…A decrease in the culture temperature from 25 to 5°C had no signif icant effect on the microbial counts in inoculations from the organic and mineral soil horizons of the slightly and moderately disturbed KPs, which reflected the adaptation of the microflora to low ambi ent temperatures. The prevalence of psychrotolerant microorganisms in the forest tundra soils character ized by significant temperature fluctuations in the above zero range provides for continuous activity and reproduction of the microflora throughout the grow ing season [22,24,28,29,33]. The counts of saprotrophic microorganisms from the litter and upper mineral soil layers of seriously disturbed plots decreased 2 to 2.5 fold when the culture temperature dropped to 5°C.…”

Section: Resultsmentioning

confidence: 98%

“…Moreover, the soils of this zone are poor in nutrient elements but contain considerable amounts of organic matter, including plant debris with a low ash content and relatively high concentrations of the poorly decomposable fractions [10,12,22,24,28,29,32,33].…”

Section: Resultsmentioning

confidence: 99%

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Assessment of the state of soil microbial cenoses in the forest-tundra zone under conditions of airborne industrial pollution

et al. 2012

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The quantitative and functional responses of soil microbial cenoses in the forest tundra zone to pollution have been studied in the area exposed to emissions from the Norilsk Mining and Metallurgical Works. The strongest structural and functional disturbances of the soil biota have been recorded on the plots with completely destroyed vegetation. A decrease in the content of microbial carbon and an elevated respira tion rate in the technogenically transformed soils provide evidence for the functioning of the microbial com munities under stress caused by the continuous input of aggressive pollutants. The degree of transformation and the contents of technogenic elements (Ni, Cu, Co, Pb, and S) in the organic horizons of the forest tun dra soils are the major factors affecting the development and functioning of the soil microbial cenoses.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 98%

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Assessment of the state of soil microbial cenoses in the forest-tundra zone under conditions of airborne industrial pollution

et al. 2012

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“…The reflection of the anthropogenic (technogenic) impact on the woodland ecosystems and their differ ent elements, such as soils, forest cover, and phyllo sphere, is the morphological changes in the microbial populations, the kinetics of their growth and develop ment structural transformations of the microbial com munities, and the biochemical activity (Guzev, 1988;Sorokin, 1990;Nikitina, 1991;Gorlenko, 2001;Dobrovolskaya, 2002). Microbial reactions on the impact of the breaking factors are being manifested quickly and clearly.…”

Section: Introductionmentioning

confidence: 98%

“…Study of the degree of permissibility of the anthro pogenic impact on the different elements of the wood land ecosystem is possible only by comparison of the microbial component under the impact of the anthro pogenic burden, with the changes caused by natural factors (Sorokin, 1990(Sorokin, , 2009Nikitina, 1991). This causes the necessity of ecological and microbial anal ysis in undisturbed ecosystems, the necessity of study of the responses of the microbial complexes to the anthropogenic (technogenic) impact, and the choice of the indicative microbial indexes suitable for the evaluation of the disturbed ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Microbiological diagnostics of soil stage in the phyllosphere of the woodland ecosystem of Siberia

Sorokin

Afanasova

2012

Biol Bull Russ Acad Sci

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It is shown that the diagnostics of the stage of woodland soils affected by wildfires and forest cuts can be determined by the evaluation indexes of the range of the scale of abundance of typical ecologic and trophic groups of microorganisms (ECTGM), microbiological activity coefficients, reserve and abundance fluctuations, and metabolism. The degree of impact of the technogenic emissions on the forest cover, soil, and phyllosphere according to ECTGM abundance on the diagnostic environments and their fermentative activ ity is expressed with the help of an advisability functional relation.

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Wildfires as a Factor of Loss of Biodiversity and Forest Ecosystem Functions

Geraskina¹,

Тебенькова²,

Ershov³

et al. 2022

FSI

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Due to the ever-increasing anthropogenic impact and global climate change, wildfires are becoming more frequent and intense all over the world. The wildfire factor is turning into an acute problem for forested countries that requires prompt solutions as the areas of forest ecosystems are reducing catastrophically, which results in an irreparable loss of biodiversity that provides all ecosystem functions and services. Many biologists consider wildfires a factor destructive to biota that results in permanent loss of some species and groups of living organisms; even if it is possible for them to recover after a wildfire, they may need a lot of time to do so. However, some studies argue that wildfires do not reduce the biodiversity in forest ecosystems, but even increase it, thus contributing to species conservation and sustainable functioning of forests. This article is aimed at analyzing the studies of how wildfires impact the main components, biodiversity, and functions of forest ecosystems. The authors answer the question of why wildfires while being a destructive factor, are sometimes considered a factor increasing biodiversity. The “positive” influence wildfires have on biodiversity mostly comes down to the formation of mosaic patterns, that is, forest canopy gaps that occur after a wildfire. However, analysis of references shows that the established opinion found in a number of studies that a certain frequency of wildfires is necessary to maintain forest communities may be associated with ignoring or misunderstanding the importance of biotic factors in the functioning of forests. In modern forest ecosystems, populations of keystone large mammal species have disappeared or greatly declined; therefore, there are no microsites they usually form, including large forest canopy gaps (glades) that provide opportunities for photophilous flora and pollinating insects to develop and generally maintain adequate conditions for multi-aged polydominant forest ecosystems with high biodiversity. In the forestry practice, there are measures to maintain mosaics. They include special types of felling, supporting populations of keystone animal species, etc., and are both significantly less catastrophic in comparison with the wildfire factor and substantiated biologically. The authors provide recommendations for the conservation and maintenance of biodiversity and ecosystem functions in modern forests.

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Ecological characteristics of the Microflora development in the forest cryogenic soils in the north of Central Siberia

Cited by 3 publications

References 1 publication

Assessment of the state of soil microbial cenoses in the forest-tundra zone under conditions of airborne industrial pollution

Assessment of the state of soil microbial cenoses in the forest-tundra zone under conditions of airborne industrial pollution

Microbiological diagnostics of soil stage in the phyllosphere of the woodland ecosystem of Siberia

Wildfires as a Factor of Loss of Biodiversity and Forest Ecosystem Functions

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