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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tang K.W., Gladyshev M.I., Dubovskaya O.P., Kirillin G..., Grossart H.P.
Заглавие : Zooplankton carcasses and non-predatory mortality in freshwater and inland sea environments
Колич.характеристики :16 с
Коллективы : Humboldt Foundation; Ministry of Education and Science of Russian Federation (Siberian Federal University) [B-15]; Leibniz-Association [SAW-2011-IGB-2]; German Science foundation [KI-853/7-1, GR1540/20-1]
Место публикации : J. Plankton Res.: OXFORD UNIV PRESS, 2014. - Vol. 36, Is. 3. - С. 597-612. - ISSN 0142-7873, DOI 10.1093/plankt/fbu014. - ISSN 1464-3774
Примечания : Cited References: 168. - This work was supported by the Humboldt Foundation (Fellowship for Experienced Researchers to K. W. T.); Siberian Branch of Russian Academy of Science (Partner Project No. 8 to M. I. G. and O.P.D.); Federal Tasks of Ministry of Education and Science of Russian Federation (project B-15 of Siberian Federal University to M. I. G.); the Leibniz-Association (SAW-2011-IGB-2 to G. K.); and the German Science foundation (KI-853/7-1 to G. K., GR1540/20-1 to H. P. G.). The manuscript benefited from the constructive comments from three reviewers.
Предметные рубрики: SMALL-SCALE TURBULENCE
NON-CALANOID COPEPODS
AGGREGATES LAKE SNOW
DAPHNIA-GALEATA
MIDSUMMER DECLINE
NONCONSUMPTIVE MORTALITY
CRUSTACEAN ZOOPLANKTON
CLIMATE-CHANGE
VERTICAL-DISTRIBUTION
POPULATION-GROWTH
Ключевые слова (''Своб.индексиров.''): carbon flux--inland waters--lakes--live--dead sorting--non-predatory mortality--zooplankton carcasses
Аннотация: Zooplankton carcasses are ubiquitous in marine and freshwater systems, implicating the importance of non-predatory mortality, but both are often overlooked in ecological studies compared with predatory mortality. The development of several microscopic methods allows the distinction between live and dead zooplankton in field samples, and the reported percentages of dead zooplankton average 11.6 (minimum) to 59.8 (maximum) in marine environments, and 7.4 (minimum) to 47.6 (maximum) in fresh and inland waters. Common causes of non-predatory mortality among zooplankton include senescence, temperature change, physical and chemical stresses, parasitism and food-related factors. Carcasses resulting from non-predatory mortality may undergo decomposition leading to an increase in microbial production and a shift in microbial composition in the water column. Alternatively, sinking carcasses may contribute significantly to vertical carbon flux especially outside the phytoplankton growth seasons, and become a food source for the benthos. Global climate change is already altering freshwater ecosystems on multiple levels, and likely will have significant positive or negative effects on zooplankton non-predatory mortality. Better spatial and temporal studies of zooplankton carcasses and non-predatory mortality rates will improve our understanding of this important but under-appreciated topic.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Degermendzhy A.G., Zadereev E.S., Rogozin D.Y., Prokopkin I.G., Barkhatov Y.V., Tolomeev A.P., Khromechek E.B., Janse J.H., Mooij W.M., Gulati R.D.
Заглавие : Vertical stratification of physical, chemical and biological components in two saline lakes Shira and Shunet (South Siberia, Russia)
Место публикации : Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - С. 619-632. - ISSN 13862588 (ISSN) , DOI 10.1007/s10452-010-9336-6
Ключевые слова (''Своб.индексиров.''): ciliates--cryptomonas--fishless lakes--gammarus--mathematical modelling--meromictic lakes--phytoplankton--stratification--sulphur bacteria--amphipod--bacterium--biomass--ciliate--ecosystem modeling--flagellate--meromictic lake--microbial community--numerical model--physicochemical property--phytoplankton--population density--saline lake--salinity--stratification--thermocline--trophic interaction--vertical profile--zooplankton--khakassia--lake shira--lake shunet--russian federation--siberia--amphipoda--bacteria (microorganisms)--ciliophora--copepoda--cryptomonas--cryptomonas sp.--gammaridae--gammarus--gammarus lacustris--phytomastigophorea--protista--rotifera
Аннотация: A feature of meromictic lakes is that several physicochemical and biological gradients affect the vertical distribution of different organisms. The vertical stratification of physical, chemical and biological components in saline, fishless meromictic lakes Shira and Shunet (Siberia, Russia) is quite different mainly because both mean depth and maximum depth of lakes differ as well as their salinity levels differ. The chemocline of the Lake Shira, as in many meromictic lakes, is inhabited by bacterial community consisting of purple sulphur and heterotrophic bacteria. As the depth of the chemocline is variable, the bacterial community does not attain high densities. The mixolimnion in Lake Shira, which is thermally stratified in summer, also creates different habitat for various species. The distribution of phytoplankton is non-uniform with its biomass peak in the metalimnion. The distribution of zooplankton is also heterogeneous with rotifers and juvenile copepods inhabiting the warmer epilimnion and older copepods found in the cold but oxic hypolimnion. The amphipod Gammarus lacustris which can be assigned to the higher trophic link in the fishless lake's ecosystem, such as Lake Shira, is also distributed non-uniformly, with its peak density generally observed in the thermocline region. The chemocline in Lake Shunet is located at the depth of 5 m, and unlike in Lake Shira, due to a sharp salinity gradient between the mixolimnion and monimolimnion, this depth is very stable. The mixolimnion in Lake Shunet is relatively shallow and the chemocline is inhabited by (1) an extremely dense bacterial community; (2) a population of Cryptomonas sp.; and (3) ciliate community comprising several species. As the mixolimnion of Lake Shunet is not thermally stratified for long period, the phytoplankton and zooplankton populations are not vertically stratified. The gammarids, however, tend to concentrate in a narrow layer located 1-2 m above the chemocline. We believe that in addition to vertical inhomogeneities of both physicochemical parameters, biological and physical factors also play a role in maintaining these inhomogeneities. We conclude that the stratified distributions of the major food web components will have several implications for ecosystem structure and dynamics. Trophic interactions as well as mass and energy flows can be significantly impacted by such heterogeneous distributions. Species spatially separated even by relatively short distances, say a few centimetres will not directly compete. Importantly, we demonstrate that not only bacteria, phytoflagellates and ciliate tend to concentrate in thin layers but also larger-sized species such Gammarus (amphipods) can also under certain environmental conditions have stratified distribution with maxima in relatively thin layer. As the vertical structure of the lake ecosystem is rather complex in such stratified lakes as ours, the strategy of research, including sampling techniques, should consider potentially variable and non-homogeneous distributions. В© 2010 The Author(s).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Degermendzhy A.G., Gulati R.D.
Заглавие : Understanding the mechanisms of blooming of phytoplankton in Lake Shira, a saline lake in Siberia (the Republic of Khakasia)
Место публикации : Aquatic Ecology. - 2002. - Vol. 36, Is. 2. - С. 331-340. - ISSN 13862588 (ISSN)
Ключевые слова (''Своб.индексиров.''): carbon budget--cyanobacteria--heterotrophic bacteria--hydrogen sulphide--mathematical models of stratification--meromictic lakes--microbial loop--stratification--trophic scheme--algal bloom--ecosystem modeling--limiting factor--nutrient availability--phytoplankton--saline lake--trophic interaction--russian federation--algae--bacteria (microorganisms)--cyanobacteria--lyngbya--lyngbya contorta
Аннотация: The paper summarises the results of a three-year research study (European Union Grant: INTAS 97-0519) aimed at investigating the planktonic populations and trophic organization of the Lake Shira ecosystem - a saline lake in Khakasia, Siberia. The lake exhibits a stable summer-autumn stratification of the chemical-biological components. The mechanisms responsible for the 'blooming' of phytoplankton in the deeper layers were investigated in greater detail, using data from both field and laboratory experiments. The spectra of nutrition were examined to estimate the relationships between the specific growth rates of the hydrobionts and the influence of the limiting factors: light, nutrients. The observed heterotrophic capability of a metalimnetic phytoplankton population might help explain the development in the deeper waters of Lyngbya contorta. The scheme of trophic interactions was put up, based on the assessment of the carbon pools and carbon flows in the pelagic zone of the lake. A mathematical model of the vertical structure of the lake's plankton populations was constructed, using the ecosystem description and data of vertical turbulent diffusion. The role of light and nutrient limitations and grazing mortality in forming the vertical inhomogeneities, particularly in lowering the depth of the maximal cyanobacterial biomass, has been demonstrated. The theoretical curves for the stratification of chemical and biological parameters have been brought in conformity with the field observations, e.g. for the different patterns of the peaks, and for the biomass maxima of cyanobacteria, purple and green sulphur bacteria, oxygen, and hydrogen sulphide. The calculations revealed that for an adequate assessment of the parameters for the hydrogen sulphide zone it is necessary to introduce flows of allochthonous organic matter. Based on the form of the sulphur distribution curve, the allochthonous input of organic matter and the inflow of hydrogen sulphide from the bottom have been theoretically discriminated for the first time. It has also been ascertained that irrespective of the depth the allochthonous substances limiting bacterial growth, the bacteria are uniformly distributed over depth and can serve as an indicator of the presence of limitation (the effect of autostabilisation in space). Of indisputable interest to limnology are the specific methods developed for understanding the functioning of Lake Shira ecosystem. These include the autostabilisation of the limiting factors, the on-the-spot fluorescent method of determining the three classes of microalgae, the algal mixotrophy and the planktonic population interactions and feedbacks, and development of a more sensitive, bioluminescent method for mapping the nonhomogeneities. Owing to a balanced combination of classical approaches (field observations, in situ data on production-decomposition) and the more recent ones (satellite monitoring, biophysical methods of estimating interactions of populations, mathematical models based on the field and experimental data), many of the structural-function relationships in the ecosystem can now be explained, and the models can provide 'mutual control and mutual agreement' between the data collected using different approaches.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Brilkov A.V., Loginov I.A., Morozova E.V., Pechurkin N.S.
Заглавие : Trends in microevolution of microbial populations in open systems
Место публикации : Doklady Biochemistry and Biophysics. - 2005. - Vol. 404, Is. 1-6. - С. 349-352. - ISSN 16076729 (ISSN) , DOI 10.1007/s10628-005-0111-x
Ключевые слова (''Своб.индексиров.''): article--bacterial phenomena and functions--bacterium--biological model--culture technique--escherichia coli--evolution--genetics--growth, development and aging--mathematics--methodology--mutation--nanotechnology--ph--physiology--population dynamics--time--bacteria--bacterial physiology--cell culture techniques--escherichia coli--evolution--hydrogen-ion concentration--mathematics--models, biological--mutation--nanotechnology--population dynamics--time factors
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bashmakova E. E., Krasitskaya V. V., Yushkova A. D., Dobrecov K. G., Frank L. A.
Заглавие : To the question of genetic predisposition to the development of professional sensorineural hearing loss
Место публикации : Vestn. Otorinolaringologii: Media Sphera Publishing Group, 2021. - Vol. 86, Is. 1. - С. 15-19. - ISSN 00424668 (ISSN), DOI 10.17116/otorino20218601115
Аннотация: Objective was to study single-nucleotide polymorphisms (SNP) in CAT, NCL, HSPA1L, PCDH15, and PON2 genes and their associations with hearing impairment among the people working among noise-exposed workers of the mashine-building plant (JSC «Krasmash», Krasnoyarsk, Eastern Siberia, Russia). Materials and methods. The 443 employees of Krasmash JSC, who have been working under conditions of increased noise for at least 1 year, were surveyed and examined. A hearing study was performed by speech and tonal audiometry. Tonal audiometry was carried out in accord with according to a standard method in the frequency range 125—8000 Hz. People with chronic hearing impairment, survivors of meningitis and family history of hearing impairment were excluded from the study. The allelic composition of the studied genes was determined in the remaining group of 288 workers (study group). Polymorphisms were detected using bioluminescent method, developed by the authors earlier. The study group comprised 122 people with hearing impairment (experimental group) and 166 people without impairment (control group). Results. The genotyping results of on allelic variants rs494024 (CAT), rs7598759 (NCL), rs2227956 (HSPA1L), rs7095441 (PCDH15) and rs7785846 (PON2) showed that their frequencies in the study group did not differ and were comparable with those for the European population. No statistically significant differences were revealed in the distribution of the genotypes of the studied mutations between the experimental and control groups. Also no statistically significant associations we found between hearing impairment and availability of two or several SNPs, or these SNPs and clinical characteristics of the disease (degree of hearing impairment, tinnitus). In the group of workers with an experience of 5 to 16 years, an association was found for hearing impairment and SNP rs494024, as well as when it is combined with rs7598759. Conclusions. The associations between SNP rs7598759, rs2227956, and rs7095441 and hearing impairment were not found. In the group of workers with 5—16 year experience, this association was found for SNP rs494024, as well as when it is combined with rs7598759. Discovered associations require further study. © 2021, Media Sphera Publishing Group. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lopatina T., Anishchenko O., Oskina N., Zadereev E.
Заглавие : Threshold concentrations of the road salt for adverse effects on females and resting eggs of cladoceran Moina macrocopa
Место публикации : Aquatic Ecol.: Springer Science and Business Media B.V., 2021. - Article in press. - ISSN 13862588 (ISSN), DOI 10.1007/s10452-021-09830-z
Аннотация: The salinization of freshwaters due to the use of deicing road salts is a serious anthropogenic threat. We investigated the effects of the road deicer, which is mostly composed (ca. 70%) of NaCl, on the life cycle parameters of the cladoceran Moina macrocopa in acute and chronic toxicity tests and on the hatching success of resting eggs exposed to sediments contaminated with the road salt. The negative effects of the road salt on survival and life cycle parameters of animals were observed at concentrations above 5 g L?1. The 6-month exposure of resting eggs to contaminated sediments had a consistent but relatively weak effect on the postexposure hatching of resting eggs. Experiments demonstrated that the concentration of the deicer in the top water layer in the water-sediment systems is more important for the hatching success of resting eggs than the salt content in the sediment. Only 2.2 ± 1.9% of resting eggs hatched when the deicer content in the top water layer was equal to 12 g L?1. Lethal effects on hatchlings were observed starting from the deicer content in the water equal to 1 g L?1, and 97.0 ± 0.8% of hatchlings were dead at the deicer content in the water equal to 5 g L?1. Thus, the resilience of resting eggs to the contaminated sediments can ensure the replenishment of the population from the egg bank after the salinity disturbance is diminished but the negative effects of the elevated salt content in surface waters on active population will be manifested at lower salinities. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lopatina, Tatiana, Anishchenko, Olesya, Oskina, Natalia, Zadereev, Egor
Заглавие : Threshold concentrations of the road salt for adverse effects on females and resting eggs of cladoceran Moina macrocopa
Колич.характеристики :15 с
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Krasnoyarsk Krai Government; Krasnoyarsk Regional Fund [19-44-240014]
Место публикации : Aquat. Ecol.: SPRINGER, 2021. - Article in press. - ISSN 1386-2588, DOI 10.1007/s10452-021-09830-z. - ISSN 1573-5125(eISSN)
Примечания : Cited References:45. - The reported study was funded by the Russian Foundation for Basic Research, the Krasnoyarsk Krai Government, and the Krasnoyarsk Regional Fund for supporting scientific and technical activities, project number 19-44-240014. We are grateful to two anonymous reviewers for the valuable comments and suggestions and to Elena Krasova for linguistic check and improvements.
Аннотация: The salinization of freshwaters due to the use of deicing road salts is a serious anthropogenic threat. We investigated the effects of the road deicer, which is mostly composed (ca. 70%) of NaCl, on the life cycle parameters of the cladoceran Moina macrocopa in acute and chronic toxicity tests and on the hatching success of resting eggs exposed to sediments contaminated with the road salt. The negative effects of the road salt on survival and life cycle parameters of animals were observed at concentrations above 5 g L-1. The 6-month exposure of resting eggs to contaminated sediments had a consistent but relatively weak effect on the postexposure hatching of resting eggs. Experiments demonstrated that the concentration of the deicer in the top water layer in the water-sediment systems is more important for the hatching success of resting eggs than the salt content in the sediment. Only 2.2 +/- 1.9% of resting eggs hatched when the deicer content in the top water layer was equal to 12 g L-1. Lethal effects on hatchlings were observed starting from the deicer content in the water equal to 1 g L-1, and 97.0 +/- 0.8% of hatchlings were dead at the deicer content in the water equal to 5 g L-1. Thus, the resilience of resting eggs to the contaminated sediments can ensure the replenishment of the population from the egg bank after the salinity disturbance is diminished but the negative effects of the elevated salt content in surface waters on active population will be manifested at lower salinities.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rogozin D.Yu., Pimenov N.V., Kosolapov D.B., Chan'kovskaya Yu.V., Degermendzhy A.G.
Заглавие : Thin-layer vertical distribution of purple sulfur bacteria in the chemoclines of meromictic lakes Shira and Shunet (Khakasia, Southern Siberia)
Место публикации : Doklady Akademii Nauk. - 2005. - Vol. 400, Is. 3. - С. 426-429. - ISSN 08695652 (ISSN)
Ключевые слова (''Своб.индексиров.''): bacteria--bathymetry--biochemistry--geochemistry--physical chemistry--water bacteriology--bathometers--vertical distribution--lakes
Аннотация: Vertical inhomogeneity of microbial population, biogeochemical processes and physicochemical characteristics of chemocline was revealed using specially created stratification bathometer (sampler) consisting of syringes horizontally placed one over another on a carrying frame.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S., Tolomeyev A.P., Drobotov A.V., Emeliyanova A.Y., Gubanov M.V.
Заглавие : The vertical distribution and abundance of Gammarus lacustris in the pelagic zone of the meromictic lakes Shira and Shunet (Khakassia, Russia)
Место публикации : Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - С. 531-539. - ISSN 13862588 (ISSN) , DOI 10.1007/s10452-010-9329-5
Ключевые слова (''Своб.индексиров.''): amphipod--gammarus lacustris--meromictic lake--thermocline--vertical distribution--abundance--amphipod--dissolved oxygen--intertidal environment--meromictic lake--pelagic environment--seston--stratification--thermocline--vertical distribution--videography--water temperature--khakassia--lake shira--lake shunet--russian federation--amphipoda--animalia--gammarus--gammarus lacustris
Аннотация: The vertical distribution and abundance of Gammarus lacustris in the pelagic zone of two fishless meromictic lakes, L. Shira and L. Shunet, in Southern Siberia (Russia), was studied with the underwater video recording system and using vertical hauls. In both lakes, during summer stratification, Gammarus was distributed non-homogenously, with a stable peak in the metalimnion. The average depth of Gammarus population in the pelagic zone was significantly correlated with the depth of the thermocline. Gammarus abundances obtained using vertical plankton hauls with net were quite comparable with those obtained from video records. The peak abundance of Gammarus in the pelagic zone of the lakes observed with underwater video amounted up to 400 individuals m-2, while the peak animal densities in the metalimnion reached 50 ind. m-3. The data are compared with previously published abundances of Gammarus in the littoral of Lake Shira. Both littoral and pelagic can be equally important habitats for amphipods in meromictic lakes. The absence of fish in the pelagic zone, high oxygen concentration, low water temperature, increased seston concentration, elevated water density in the metalimnion and the anoxic hypolimnion can be the most probable combination of factors that are responsible for the peak of Gammarus in the metalimnion of these lakes. В© 2010 Springer Science+Business Media B.V.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S., Gubanov V.G.
Заглавие : The role of population density in gamogenesis induction in moina macrocopa (Cladocera: Crustaceae)
Место публикации : Zhurnal Obshchei Biologii. - 1996. - Vol. 57, Is. 3. - С. 366-367. - ISSN 00444596 (ISSN)
Аннотация: Combined influence of population density, temperature and photoperiod on the gamogenesis of individual females of M. macrocopa was investigated. In all experiments the influence of population density was associated with the direct effect of "swarm water". The photoperiod in its broad natural range also influences gamogenesis induction. The increase in temperature above optimum but lower than lethal level sharply decreases the efficiency of gamogenesis. In this case stimulation of gamogenesis is possible by combined effect of poor feeding and high population density. If temperature and photoperiod are optimum for partenogenetic population the change of reproduction mode in lowdensity population of M. macrocopa is determined by poor feeding while in high-density populations density itself is more important. However the increase in food concentration descreases the efficiency of "swarm water" on the gamogenesis induction. According to the hypothesis of nondirect influence of population density an individual decreases its filtarion rate (and starves) under "swarm water" condition.
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11.

Вид документа : Статья из сборника (выпуск монографической серии)
Шифр издания :
Автор(ы) : Zadereev, Egor, Lopatina, Tatiana S.
Заглавие : The Role of Chemical Interactions in Embryonic Diapause Induction in Zooplankton
Колич.характеристики :11 с
Место публикации : Monogr. Biol.: SPRINGER INTERNATIONAL PUBLISHING AG, 2019. - Vol. 92. - С. 175-185. - (Monographiae Biologicae). - , DOI 10.1007/978-3-030-21213-1_10
Примечания : Cited References:60
Предметные рубрики: MOINA-MACROCOPA CLADOCERA
PREDATOR-INDUCED DIAPAUSE
SEXUAL
Аннотация: Production of resting eggs in zooplankton is controlled by multiple stimuli. In this chapter, we briefly discussed published data that confirm the effect of infochemicals produced by conspecifics, competitors, predators or preys on the production of resting eggs in zooplankton. We found that the effect of conspecific chemicals on the production of resting eggs is the most convincing. Both experimental data and theoretical research demonstrated that this density-dependent reaction often results in a competitive advantage of individuals in the population that follows such a strategy. The data on the effect of chemicals exuded by competitors or predators are controversial. Data on the effect of chemical interaction on the production of resting eggs in natural habitats are almost absent. Most of the studies of chemical interactions are performed with individuals in laboratory experiments with crowded water. Crowded water is water that contains chemicals exuded by the population. Even though this method has the number of drawbacks, it is still widely used in similar studies. There are several studies focused on the identification of the chemical nature of cues responsible for the production of resting eggs in zooplankton. Most probably, chemicals involved are short proteins. However, the exact identification of the chemicals responsible for the production of resting eggs in zooplankton remains an open task. In order to place chemical interactions into a framework of multiple diapause control theory, it is necessary to determine the nature of chemicals involved and to demonstrate population- and ecosystem-level consequences of this phenomenon in natural habitats.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nekrasov V.M., Chernychev A.V., Degermendzhy A.G.
Заглавие : The "quantization" of sensitivity coefficients is preserved in microbial populations heterogeneous with respect to growth rate and age
Место публикации : Doklady Biological Sciences. - 2006. - Vol. 406, Is. 1-6. - С. 91-93. - ISSN 00124966 (ISSN) , DOI 10.1134/S0012496606010261
Ключевые слова (''Своб.индексиров.''): algorithm--article--bacterium--biodiversity--growth, development and aging--population dynamics--theoretical model--time--algorithms--bacteria--biodiversity--models, theoretical--population dynamics--time factors
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Soukhovolsky V. G., Ivanova Y. D., Shulman K., Mazharov V. F., Tarasova I. V., Tarasova O. V., Khlebopros R. G.
Заглавие : The population dynamics of cancer incidence: The model of a second-order phase transition
Место публикации : Biophysics. - 2015. - Vol. 60, Is. 4. - С. 639-646. - ISSN 00063509 (ISSN) , DOI 10.1134/S0006350915040235
Ключевые слова (''Своб.индексиров.''): cancer incidence--models of cancer incidence development--phase transitions of the second order
Аннотация: This paper considers an approach to the description of the age-specific and time-dependent dynamics of cancer incidence. This approach is based on a model that describes the age-specific dynamics of cancer as a phase transition of the second order and is widely used in the study of physical systems. The proposed model of cancer development as the second-order phase transitions is quite consistent with the data of medical statistics, is well described using only two free parameters, easily verified by the statistical data, and is interpreted well. The applicability of the model of second-order phase transitions to the description of the processes in the nonphysical systems is likely to be determined by the versatile nature of the processes that occur during the phase transitions. © 2015, Pleiades Publishing, Inc.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Degermendzhy A.G., Pechurkin N.S., Terskov I.A.
Заглавие : The mathematical theory of population waves (Russian)
Место публикации : Studia Biophysica. - 1974. - Vol. 43, Is. 1. - С. 25-40. - ISSN 00816337 (ISSN)
Ключевые слова (''Своб.индексиров.''): evolution--mathematical model--model--population explosion--population model--theoretical study
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S., Gubanov V.G.
Заглавие : The influence of population density of Moina macrocopa (Cladocera) and food supply on the change of reproducing type in M-macrocopa
Колич.характеристики :2 с
Место публикации : Russ. J. Ecol.: MAIK NAUKA/INTERPERIODICA, 1995. - Vol. 26, Is. 5. - С. 381-382. - ISSN 1067-4136
Примечания : Cited References: 8
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S., Gubanov V.G., Egorov I.V.
Заглавие : The influence of food concentration and "water of aggregation" on the reproductive parameters of Moina macrocopa (Crustacea: Cladocera) females
Место публикации : Zhurnal Obshchei Biologii. - 1998. - Vol. 59, Is. 1. - С. 55-57. - ISSN 00444596 (ISSN)
Аннотация: Combined influence of "water of aggregation" and food concentration on the reproductive parameters of Moina macrocopa females was investigated. In all experiments the influence of population density was associated with the effect of "water of aggregation" prepared earlier by keeping dense population (200 ?g/ml) of M. macrocopa. It was shown that life-span of M. macrocopa females in "water of aggregation" was not dependent on food concentration; under conditions of all tested food concentration it was less than in case of control clean water. There was no difference in proportion of males produced in "water of aggregation" and in control though more males were born under conditions of higher food concentration. In general "water of aggregation" causes a specific acceleration of female life history: the life-span and the period between clutches decrease, the amount of neonates in last clutches increases while the chance of male production at the beginning of reproduction period becames greater. The "water of aggregation" could also causes the formation of ephipial eggs instead of the first partenogenetic clutch. It seems that life strategy under conditions of very high mortality associated with "water of aggregation" is aimed to maximum realization of individual capacities in short period of time.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E.S., Gubanov V.G., Egorov I.V.
Заглавие : The influence of food concentration and "water aggregation" on the reproductive parameters of Moina macrocopa (Crustacea : Cladocera) females
Колич.характеристики :13 с
Место публикации : Zhurnal Obshchei Biol.: MEZHDUNARODNAYA KNIGA, 1998. - Vol. 59, Is. 1. - P45-57. - ISSN 0044-4596
Примечания : Cited References: 27
Предметные рубрики: DAPHNIA-MAGNA
EGG SIZE
DENSITY
POPULATION
INDUCTION
PULEX
Аннотация: Combined influence of "water of aggregation" and food concentration on the reproductive parameters of Moina macrocopa females was investigated. In all experiments the influence of population density was associated with the effect of "water of aggregation" prepared earlier by keeping dense population (200 mu g/ml) of M. macrocopa. It was shown that life-span of M. macrocopa females in "water of aggregation" was not dependent on food concentration; under conditions of all tested food concentration it was less than in case of control clean water. There was no difference in proportion of males produced in "water of aggregation" and in control though more males were born under conditions of higher food concentration. In general "water of aggregation" causes a specific acceleration of female life history: the life-span and the period between clutches decrease, the amount of neonates in last clutches increases while the chance of male production at the beginning of reproduction period becames greater. The "water of aggregation" could also causes the formation of ephipial eggs instead of the first partenogenetic clutch. It seems that life strategy under conditions of very high mortality associated with "water of aggregation" is aimed to maximum realization of individual capacities in short period of time.
WOS
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E. S., Lopatina T. S., Ovchinnikov S. D., Oskina N. A., Drobotov, A., V, Tolomeev A. P.
Заглавие : The effect of salinity on the grazing rate and survival of Daphnia magna females adapted to different salinities
Колич.характеристики :14 с
Коллективы : Krasnoyarsk Regional Fund; Krasnoyarsk Krai Government; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-44-240010]
Место публикации : Aquat. Ecol.: SPRINGER, 2022. - Article in press. - ISSN 1386-2588, DOI 10.1007/s10452-021-09941-7. - ISSN 1573-5125(eISSN)
Примечания : Cited References:47. - The reported study was funded by the Krasnoyarsk Regional Fund for supporting scientific and technical activities, the Krasnoyarsk Krai Government and the Russian Foundation for Basic Research, project number 19-44-240010. We are grateful to professional English translator Elena Krasova for language corrections.
Предметные рубрики: FEEDING-BEHAVIOR
PHYTOPLANKTON CONTROL
SPECIES COMPOSITION
Аннотация: The cladoceran Daphnia magna inhabits lakes with salinities up to 10 g L-1. We compared the effects of different salinities (up to 9 g L-1) on the survival, specific grazing rate, and size selective feeding of Daphnia females adapted to fresh or saline waters (3-4 g L-1). The freshwater population was more sensitive to high salinity (LC50 = 5.3 g L-1), while the survival of the saline water population also decreased in fresh water. Freshwater population demonstrated a higher grazing rate in fresh water, while the saline water population had a higher grazing rate at the salinity above 3 g L-1. A decrease in the grazing rate of the freshwater population was observed at the salinity above 4-5 g L-1. Populations differed in food selectivity. The saline water population consumed particles of larger sizes than the freshwater population. The average size of phytoplankton particles grazed in fresh water was larger than in saline water. This size selective salinity-dependent grazing may be related to the dependence of the feeding efficiency of cladocerans on the viscosity of water and size of phytoplankton particles. Our results indicate that Daphnia populations adapted to a certain salinity can temporarily lose the ability to control phytoplankton because of salinity fluctuations.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev Y.S., Gubanov M.V.
Заглавие : The effect of chemicals released by Gammarus lacustris on the depth distribution of Arctodiaptomus salinus in laboratory conditions
Место публикации : Aquatic Ecology. - 2002. - Vol. 36, Is. 2. - С. 257-260. - ISSN 13862588 (ISSN) , DOI 10.1023/A:1015635903281
Ключевые слова (''Своб.индексиров.''): arctodiaptomus--chemical communication--gammarids--predation--shira lake--vertical distribution--chemical ecology--interspecific interaction--saline lake--vertical distribution--zooplankton--russian federation--algae--amphipoda--arctodiaptomus--copepoda--gammarus--gammarus lacustris
Аннотация: The effect of treatment water containing chemicals released by Gammarus lacustris or crushed/injured Arctodiaptomus salinus induced changes in vertical distribution of Arctodiaptomus in laboratory conditions. With food concentration in the medium corresponding to the maximum of algae concentration in Shira lake, A. salinus in an experimental vessel was situated higher than in the control. Average population depth of A. salinus decreased as the inoculation density of G. lacustris increased.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pechurkin N.S., Shirobokova I.M.
Заглавие : System analysis of links interactions and development of ecosystems of different types
Место публикации : Advances in Space Research. - 2003. - Vol. 31, Is. 7. - С. 1667-1674. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)80013-3
Ключевые слова (''Своб.индексиров.''): free energy--heuristic methods--hierarchical systems--mathematical models--photosynthesis--systems analysis--biological interactions--ecosystems--anthropogenic effect--ecosystem function--systems analysis--article--biological model--biomass--ecology--ecosystem--energy transfer--environmental protection--food chain--methodology--microclimate--plankton--population dynamics--statistics--biomass--conservation of natural resources--ecological systems, closed--ecology--ecosystem--energy transfer--food chain--models, biological--plankton--population dynamics
Аннотация: The anthropogenic impact on the Earth's ecosystems are leading to dramatic changes in ecosystem functioning and even to destruction of them. System analysis and the use of heuristic modeling can be an effective means to determine the main biological interactions and key factors that are of high importance for understanding the development of ecosystems. Cycling of limiting substances, induced by the external free energy flux, and trophic links interaction is the basis of the mathematical modeling studies presented in this paper. Mathematical models describe the dynamics of simplified ecosystems having different characteristics: 1) different degrees of biotic turnover closure (from open to completely closed); 2) different numbers of trophic links (including both "topdown", "bottom-up" regulation types); 3) different intensities of input - output flows of the limiting nutrient and its total amount in the system. Adaptive values of the changes of lower hierarchical levels (populational, trophic chain level) are to be estimated by integrity indices for total system functioning (e.g. NPP, total photosynthesis). The approach developed can be used for evaluating the contributions of lower hierarchical levels to the functioning of the higher hierarchical levels of the system. This approach may have value for determining biomanipulation management and their assessment. В© 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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