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1.
Izv Akad Nauk Ser Biol ; (1): 76-85, 2014.
Artigo em Russo | MEDLINE | ID: mdl-25735159

RESUMO

Based on the results of long-term investigations, quantitative assessment ofphytodetrite mineralization rates is provided. Their role in the biological cycle of larch stands growing in the permafrost zone of Central Evenkia is discussed. It is demonstrated that their destruction in the subshrub-sphagnum and cowberry-green moss larch stands is extremely slow, the plant litter contains the most cecalcitrant organic matter demonstrating the lowest decomposition coefficient of 0.03-0.04 year(-1), whereas fresh components of the plant litter have 3- to 4-fold higher values. An insignificant input of N and C from the analyzed mortmass to the soil has been registered. It has been revealed that the changes in N and C in the decomposition components are closely related to the quantitative dynamics (biomass) of microorganisms, such as hydrolytics and, especially, micromicetes.


Assuntos
Ecossistema , Florestas , Pergelissolo/microbiologia , Biomassa , Larix/química , Larix/metabolismo , Folhas de Planta/metabolismo , Folhas de Planta/microbiologia , Sibéria , Solo/química , Sphagnopsida/metabolismo
2.
Izv Akad Nauk Ser Biol ; (5): 463-8, 2014.
Artigo em Russo | MEDLINE | ID: mdl-25720284

RESUMO

The occurrence of ophiostomatoid fungi, associates of xylophagous insects, was established to be an indicator of the state of coniferous plantations under different anthropogenic influences and adverse ecological conditions at the coenotic level. The sizes of necroses developed on a tree inoculated with blue-stain fungus isolates were recorded to be indicators of the state of the tree at the physiological level.


Assuntos
Ecossistema , Florestas , Fungos/isolamento & purificação , Árvores/microbiologia , Conservação dos Recursos Naturais , Fungos/metabolismo , Sibéria , Microbiologia do Solo , Árvores/crescimento & desenvolvimento
3.
Izv Akad Nauk Ser Biol ; (1): 100-8, 2012.
Artigo em Russo | MEDLINE | ID: mdl-22567877

RESUMO

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 activity is expressed with the help of an advisability functional relation.


Assuntos
Microbiologia do Solo , Árvores/microbiologia , Ecossistema , Sibéria
4.
Izv Akad Nauk Ser Biol ; (6): 691-702, 2011.
Artigo em Russo | MEDLINE | ID: mdl-22292289

RESUMO

The influence of different concentrations (10, 30, 50, 100, 150, 300) of the maximum permissible concentrations of fluoride and sulfide pollutants (Na2SO4, NaF and Na2SO3 + NaF) on highly buffered soils of larch forest of Pogorelskii pine wood in Krasnoyarsk forest-steppe was studied. As a result of the influence of treatment with high concentrations of fluoride and sulfide compounds, the intensity of respiration of microorganisms and values of the microbe metabolic coefficient increased, and the biomass of microorganisms and enzymatic activity decreased compared to the control by 1.3-2.7 times. By the end of vegetation, the ecophysiological condition of microbiocenoses of the studied regions had stabilized.


Assuntos
Bactérias/efeitos dos fármacos , Poluentes Ambientais/toxicidade , Fluoretos/toxicidade , Microbiologia do Solo , Sulfetos/toxicidade , Árvores/microbiologia , Anaerobiose , Bactérias/classificação , Dióxido de Carbono/metabolismo , Modelos Biológicos
5.
Izv Akad Nauk Ser Biol ; (6): 728-33, 2009.
Artigo em Russo | MEDLINE | ID: mdl-20143632

RESUMO

Microbiological analysis of different elements of the forest ecosystem (soil, leaf-litter) in zones of active anthropogenic (technogenic) impact shows that microbial complexes serve as an instrument of condition diagnosis and monitoring of ground ecosystems. Fluctuations of the number of microorganisms, the scale of the ETGM number, coefficient of microbiological activity, and the reaction of introduced population of Bacillus subtilis to different doses of pollution may be considered as convenient characteristics.


Assuntos
Bacillus subtilis/fisiologia , Ecossistema , Microbiologia do Solo , Monitoramento Ambiental/métodos , Sibéria
6.
Izv Akad Nauk Ser Biol ; (6): 676-81, 2007.
Artigo em Russo | MEDLINE | ID: mdl-19768961

RESUMO

Microbial respiration and biomass were evaluated in soils of the Ermak Tree Nursery and Pogorel'skii Forest under different coniferous species. The degree of disturbance of each biocenosis was determined from the metabolic coefficient (qCO2). The microbial investigation demonstrated a lower resistance to ecological factors of the tree nursery biocenosis as compared to those of the Pogorel'skii Forest.


Assuntos
Monitoramento Ambiental/métodos , Microbiologia do Solo , Solo/normas , Árvores , Dióxido de Carbono/análise , Sibéria , Solo/análise , Microbiologia do Solo/normas , Árvores/crescimento & desenvolvimento
7.
Izv Akad Nauk Ser Biol ; (4): 491-5, 2006.
Artigo em Russo | MEDLINE | ID: mdl-17022482

RESUMO

Data were obtained on the improvement of soil microbiocenoses in artificial ecosystems after the introduction of micromycetes Trichoderma. Application of biologically active substances released by some of aboriginal microbial strains can solve bioremediation problems in a given region at a low cost.


Assuntos
Microbiologia do Solo , Trichoderma , Animais , Biodegradação Ambiental , Ecossistema , Árvores/microbiologia
8.
Izv Akad Nauk Ser Biol ; (5): 545-51, 2005.
Artigo em Russo | MEDLINE | ID: mdl-16240750

RESUMO

Microbial communities of alluvial soils in the facies on islands in the Selenga estuary and near Stepnoi Dvorets and Istomino Settlements were studied. The distribution of the CFU-dominant microorganisms (Bacillus and Pseudomonas + Arthrobacter) has been revealed in the studied island soils. In addition, actinomycetes Streptomyces were found among the dominants in soils of the near-terrace floodplain. The quantitative distribution of microorganisms across soil layers was demonstrated. The effect of ecological factors in formation of microbial communities on the islands and central floodplain regions was revealed.


Assuntos
Bactérias Gram-Positivas/isolamento & purificação , Pseudomonas/isolamento & purificação , Rios/microbiologia , Microbiologia do Solo , Microbiologia da Água , Sibéria
9.
Izv Akad Nauk Ser Biol ; (3): 375-84, 2004.
Artigo em Russo | MEDLINE | ID: mdl-15354965

RESUMO

Data on the postfire dynamics of soil properties in the foci of Siberian moth population outbreaks are considered. It has been shown that controlled fires set in pest-defoliated forests result in the loss of approximately 75% of carbon and 50% of nitrogen from the forest litter through their emission into the atmosphere and in the enrichment of the upper soil horizons with potassium and phosphorus (this concerns both total and movable forms). Microbiological processes in the organogenic horizon undergo significant transformation, the density of microarthropods decreases, and the abundance of mites becomes hundreds of times lower.


Assuntos
Ecossistema , Controle de Insetos/métodos , Mariposas , Solo/análise , Animais , Incêndios , Sibéria , Microbiologia do Solo , Carrapatos , Árvores
10.
Izv Akad Nauk Ser Biol ; (1): 49-58, 2004.
Artigo em Russo | MEDLINE | ID: mdl-15049069

RESUMO

It is shown that larch of the prefire generation is the main edificator at the early stages of restorative successions in burned-out areas. Its environment-forming effect manifests itself most strongly in the phytogenic field of living trees, where edaphic conditions similar to those in primary larch forests are formed within ten years after the fire. This is accompanied by an increase in the numbers of microorganisms utilizing organic and mineral nitrogen, as well as in the rate of nitrogen mineralization in plant microgroups of this zone. Hence, living trees remaining in a burned-out area promote restoration of the initial edaphic conditions.


Assuntos
Incêndios , Larix/fisiologia , Árvores , Ecologia , Meio Ambiente , Nitrogênio/metabolismo , Sibéria
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