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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dubovskaya O. P., Yolgina O. E., Morozova I. I.
Заглавие : Zooplankton of Lake Pyasino and the Rivers Flowing into It after the Diesel Spill in 2020
Колич.характеристики :11 с
Коллективы : Siberian Branch of the Russian Academy of SciencesRussian Academy of Sciences [223-EP-2020/07]
Место публикации : Contemp. Probl. Ecol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2021. - Vol. 14, Is. 4. - С. 380-390. - ISSN 1995-4255, DOI 10.1134/S199542552104003X. - ISSN 1995-4263(eISSN)
Примечания : Cited References:35. - This work was supported by economic agreement no. 223-EP-2020/07 with the Siberian Branch of the Russian Academy of Sciences.
Предметные рубрики: NONPREDATORY MORTALITY
OIL-SPILLS
RECORDS
BASIN
STATE
Аннотация: At the beginning of August, 2 months after 20 000 t of diesel fuel spilled into the Bezymyanny Stream (which took it out to the Daldykan and Ambarnaya rivers), the large Norilsk expedition of the Siberian Branch, Russian Academy of Sciences, sampled net zooplankton at 13 stations located in both sections of these rivers and Lake Pyasino with the Pyasina River outflowing from it. A comparative analysis of the species composition, abundance, biomass, and saprobity index of zooplankton at these stations has been carried out. The productions of rotifer and crustacean zooplankton and potential production of planktivorous fish in Lake Pyasino have been calculated. Based on the state of zooplankton, a gradual improvement in water quality has been observed from river areas exposed to the oil products to the northern part of the lake and the River Pyasina outflow. The low abundance and biomass of zooplankton in the lake (43 800 +/- 17 550 ind./m(3), 112.8 +/- 26.2 mg/m(3), on average) due to the dominance of rotifers (Ploesoma truncatum (Levander), Bipalpus hudsoni (Imhof), and Conochilus unicornis Rousselet) resulted in low values of zooplankton production and the potential production of planktivorous fish (0.85 kg/ha per season).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Neubauer, Darshan, Kolmakova, Olesya, Woodhouse, Jason, Taube, Robert, Mangelsdorf, Kai, Gladyshev, Michail, Premke, Katrin, Grossart, Hans-Peter
Заглавие : Zooplankton carcasses stimulate microbial turnover of allochthonous particulate organic matter
Колич.характеристики :16 с
Коллективы : Projekt DEAL
Место публикации : ISME J.: SPRINGERNATURE, 2021. - Article in press. - ISSN 1751-7362, DOI 10.1038/s41396-020-00883-w. - ISSN 1751-7370(eISSN)
Примечания : Cited References:83. - Open Access funding enabled and organized by Projekt DEAL.
Предметные рубрики: FRESH-WATER
SEASONAL-CHANGES
CARBON
LAKE
DECOMPOSITION
DEGRADATION
Аннотация: Carbon turnover in aquatic environments is dependent on biochemical properties of organic matter (OM) and its degradability by the surrounding microbial community. Non-additive interactive effects represent a mechanism where the degradation of biochemically persistent OM is stimulated by the provision of bioavailable OM to the degrading microbial community. Whilst this is well established in terrestrial systems, whether it occurs in aquatic ecosystems remains subject to debate. We hypothesised that OM from zooplankton carcasses can stimulate the degradation of biochemically persistent leaf material, and that this effect is influenced by the daphnia:leaf OM ratio and the complexity of the degrading microbial community. Fresh Daphnia magna carcasses and C-13-labelled maize leaves (Zea mays) were incubated at different ratios (1:1, 1:3 and 1:5) alongside either a complex microbial community (50 mu m) or solely bacteria (0.8 mu m). C-13 stable-isotope measurements of CO2 analyses were combined with phospholipid fatty acids (PLFA) analysis and DNA sequencing to link metabolic activities, biomass and taxonomic composition of the microbial community. Our experiments indicated a significantly higher respiration of leaf-derived C when daphnia-derived OM was most abundant (i.e. daphnia:leaf OM ratio of 1:1). This process was stronger in a complex microbial community, including eukaryotic microorganisms, than a solely bacterial community. We concluded that non-additive interactive effects were a function of increased C-N chemodiversity and microbial complexity, with the highest net respiration to be expected when chemodiversity is high and the degrading community complex. This study indicates that identifying the interactions and processes of OM degradation is one important key for a deeper understanding of aquatic and thus global carbon cycle.
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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) : Karpowicz M., Feniova I., Gladyshev M. I., Ejsmont-Karabin J., Gorniak A., Sushchik N. N., Anishchenko O. V., Dzialowski A. R.
Заглавие : Transfer efficiency of carbon, nutrients, and polyunsaturated fatty acids in planktonic food webs under different environmental conditions
Место публикации : Ecology and Evolution: John Wiley and Sons Ltd, 2021. - Article in press. - ISSN 20457758 (ISSN), DOI 10.1002/ece3.7651
Аннотация: The trophic transfer efficiency (TTE) is an important indicator of ecosystem functioning. However, TTE data from freshwater food webs are ambiguous due to differences in time scales and methods. We investigated the transfer of essential substances (carbon, nutrients, and polyunsaturated fatty acids) through plankton communities in 30 Polish lakes with different trophic status in the middle of summer. The results of our study revealed that different essential substances were transferred from phytoplankton to zooplankton with varying efficiencies. The average TTE of C, N, P, and the sum of ?-3 PUFA were 6.55%, 9.82%, 15.82%, and 20.90%, respectively. Our results also show a large mismatch between the elemental and biochemical compositions of zooplankton and their food during the peak of the summer stagnation, which may further promote the accumulation of essential substances. There were also large differences in TTEs between trophic conditions, with the highest efficiencies in oligotrophic lakes and the lowest in dystrophic and eutrophic lakes. Therefore, our study indicates that disturbances like eutrophication and dystrophication similarly decrease the TTE of essential substances between phytoplankton and zooplankton in freshwater food webs. © 2021 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Karpowicz, Maciej, Feniova, Irina, Gladyshev, Michail I., Ejsmont-Karabin, Jolanta, Gorniak, Andrzej, Sushchik, Nadezhda N., Anishchenko, Olesya V., Dzialowski, Andrew R.
Заглавие : Transfer efficiency of carbon, nutrients, and polyunsaturated fatty acids in planktonic food webs under different environmental conditions
Колич.характеристики :14 с
Коллективы : Polish National Science Centre [2016/21/B/NZ8/00434]; Federal Tasks for Institute of Biophysics SB RAS [51.1.1]; Federal Tasks for Siberian Federal University [FSRG-2020-0019]
Место публикации : Ecol. Evol.: WILEY, 2021. - Article in press. - ISSN 2045-7758, DOI 10.1002/ece3.7651
Примечания : Cited References:62. - This research was supported by the Polish National Science Centre (2016/21/B/NZ8/00434). The research was also supported by Federal Tasks for Institute of Biophysics SB RAS No. 51.1.1 and Federal Tasks for Siberian Federal University No. FSRG-2020-0019. The authors are thankful to Joanna Kozowska for her help in the collection of samples.
Предметные рубрики: PHOSPHORUS STOICHIOMETRY
LIGHT-INTENSITY
ZOOPLANKTON
TEMPERATURE
Аннотация: The trophic transfer efficiency (TTE) is an important indicator of ecosystem functioning. However, TTE data from freshwater food webs are ambiguous due to differences in time scales and methods. We investigated the transfer of essential substances (carbon, nutrients, and polyunsaturated fatty acids) through plankton communities in 30 Polish lakes with different trophic status in the middle of summer. The results of our study revealed that different essential substances were transferred from phytoplankton to zooplankton with varying efficiencies. The average TTE of C, N, P, and the sum of omega-3 PUFA were 6.55%, 9.82%, 15.82%, and 20.90%, respectively. Our results also show a large mismatch between the elemental and biochemical compositions of zooplankton and their food during the peak of the summer stagnation, which may further promote the accumulation of essential substances. There were also large differences in TTEs between trophic conditions, with the highest efficiencies in oligotrophic lakes and the lowest in dystrophic and eutrophic lakes. Therefore, our study indicates that disturbances like eutrophication and dystrophication similarly decrease the TTE of essential substances between phytoplankton and zooplankton in freshwater food webs.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vinogradov M.E., Gitelzon I.I., Sorokin Yu.I.
Заглавие : The vertical structure of a pelagic community in the tropical ocean
Место публикации : Marine Biology. - 1970. - Vol. 6, Is. 3. - С. 187-194. - ISSN 00253162 (ISSN) , DOI 10.1007/BF00347226
Аннотация: The vertical structure of the ecosystem in the euphotic zone of the western Equatorial Pacific has been studied. The studies were based on a continuous sounding of the bioluminescence field, with simultaneous, vertically aimed sampling made with the aid of a 5l water bottle and plankton nets. The bioluminescence field has a two-maxima structure with a more pronounced and permanent lower maximum found in the oligotrophic regions as deep as 60 to 100 m. In the narrow (10 m) layer of maximum bioluminescence, the concentration of zooplankton, as well as the concentration, activity and production of bacteria and phytoplankton, are several times higher than those in immediately adjacent waters at greater or lesser depth. At the same time, the concentration of nutrient salts in that layer diminishes sharply and approaches zero in the overlying water. Analysis of the data obtained shows that the production processes above the lower maximum layer are dependent not only on the turbulent influx of nutrient salts from the underlying layers, but also on the horizontal supply from the zone of upwelling. A pelagic community, in its different time aspects from the moment of water ascending until its sinking in the convergence zone, is suggested as a common system for modelling. В© 1970 Springer-Verlag.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev Y.S., Tolomeyev A.P.
Заглавие : The vertical distribution of zooplankton in brackish meromictic lake with deep-water chlorophyll maximum
Место публикации : Hydrobiologia. - 2007. - Vol. 576, Is. 1. - С. 69-82. - ISSN 00188158 (ISSN) , DOI 10.1007/s10750-006-0294-x
Ключевые слова (''Своб.индексиров.''): anoxic hypolimnion--deep water chlorophyll maximum--meromictic lake--stratification--vertical distribution--zooplankton--algae--chlorophyll--growth kinetics--lakes--saline water--anoxic hypolimnion--deep water chlorophyll maximum--meromictic lake--stratification--vertical distribution--zooplanktons--biodiversity--biomass--brackish water--chlorophyll--green alga--meromictic lake--reproduction--stratification--vertical distribution--zooplankton--eurasia--khakassia--lake shira--russian federation--arctodiaptomus salinus--brachionus plicatilis--chlorophyta--copepoda--hexarthra oxiuris--rotifera
Аннотация: We examined the dynamics of the vertical stratification of physical, chemical and biological factors in a brackish meromictic lake with a deep-water chlorophyll maximum (Shira Lake, Russia, Khakasia) during the growing season and estimated how the vertical distribution of these factors influences the vertical distribution of the zooplankton community. The vertical distribution of zooplankton was restricted by the anoxic hypolimnion. Nauplii and younger copepodides (C1-C3) of the copepod, Arctodiaptomus salinus, and the rotifer, Brachionus plicatilis, were found in the upper warm waters. During summer stratification the maximum of A. salinus biomass, which consisted mainly of older copepodides (C4-C5) and females, was associated with the deep-water maximum of biomass of green algae, which are the preferred diet for this species. The vertical distribution of the rotifer Hexarthra oxiuris was bimodal with numerical peaks in the epi- and hypolimnion. Reproduction peaks of dominant species were separated in time. The reproduction peak of A. salinus was at the beginning of summer when A. salinus constituted up to 99% of total zooplankton biomass. The development of rotifers was detected after the reproduction peak of A. salinus when the biomass of rotifers reached 50% of total zooplankton biomass. В© 2007 Springer Science+Business Media B.V.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Karpowicz M., Feniova I., Gladyshev M. I., Ejsmont-Karabin J., Gorniak A., Zielinski P., Dawidowicz P., Kolmakova A. A., Dzialowski A. R.
Заглавие : The stoichiometric ratios (C:N:P) in a pelagic food web under experimental conditions
Место публикации : Limnologica: Elsevier GmbH, 2019. - Vol. 77. - Ст.125690. - ISSN 00759511 (ISSN) , DOI 10.1016/j.limno.2019.125690
Аннотация: Interactions between phytoplankton and zooplankton affect the overall functioning of lakes. Herbivores are habitually confronted with food of inferior quality, usually a result of low nutrient concentrations in plant material. Large-bodied cladocerans are better competitors for food than small-bodied species but they are more vulnerable to low food quality. Understanding the effects of food quality on zooplankton structure and competition between small - large bodied herbivorous is of considerable interest. We want to find out how differences in C:N:P ratios between phytoplankton and zooplankton communities affect their abundances in a freshwater food web. We want also to assess the role of phytoplankton and zooplankton as sinks of the phosphorus and nitrogen. Therefore, we conducted a 31-day mesocosms experiment with water from a mesotrophic and a eutrophic lake (with natural plankton communities). To simulate changes in the plankton communities large-bodied Daphnia magna and Daphnia pulicaria were added. Samples for zooplankton, phytoplankton and water chemistry were taken every 10 days. Samples for elemental analysis (C:N:P) of seston and zooplankton were collected on the first, and on the final day of the experiment. Our mesocosms experiment showed mismatch in C:P between seston (high) and zooplankton (low), which suggests that most of the phosphorus is incorporated in zooplankton biomass. This evidenced that zooplankton is an effective sink of phosphorus, while nitrogen is accumulated mainly by primary producers. Our results also indicated more stability in stoichiometry with increasing trophic levels of organisms. However, there were significant changes in the zooplankton structure. The increasing dominance of large Daphnia resulted in reduction of C:P ratio in zooplankton. Low food quality (C:P) did not limit the growth of large Daphnia in the experimental conditions, which competed effectively with small planktonic cladocerans and with Rotifera. Over time, inedible algae began to dominate resulting in increase of relative biomass of periphyton grazers, which suggests that plankton community is transformed into littoral system in mesocosms for about 30 days. © 2019
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10.

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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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Kolmakov V.I., Dubovskaya O.P., Ivanova E.A.
Заглавие : The microalgal food spectrum of Daphnia longispina during the algal bloom of an eutrophic water body.
Место публикации : Doklady Biological Sciences. - 2000. - Vol. 371, Is. 1-6. - С. 179-181. - ISSN 00124966 (ISSN)
Ключевые слова (''Своб.индексиров.''): alga--animal--article--biomass--daphnia--ecosystem--food chain--growth, development and aging--microbiology--plankton--zooplankton--algae--animals--biomass--daphnia--ecosystem--food chain--plankton--water microbiology--zooplankton
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zadereev E., Lopatina T.
Заглавие : The induction of diapause in Moina by species-specific chemical cues
Место публикации : Aquatic Ecology. - 2007. - Vol. 41, Is. 2. - С. 255-261. - ISSN 13862588 (ISSN) , DOI 10.1007/s10452-006-9062-2
Ключевые слова (''Своб.индексиров.''): chemical interaction--cladocera--diapausing eggs production--chemical composition--chemical cue--coexistence--conspecific--crustacean--detection method--diapause--ecological approach--egg production--environmental factor--gametogenesis--growth rate--laboratory method--neonate--parthenogenesis--zooplankton--cladocera--congridae--daphnia--daphnia magna--moina--moina brachiata--moina macrocopa
Аннотация: The ability to change the reproduction mode and produce diapausing eggs, which is prevalent in many zooplankton species, significantly impacts on the evolution and ecology of aquatic communities. The production of diapausing eggs is controlled by multiple effects of biotic and abiotic factors, including infochemicals. We have investigated the effects of chemicals exuded by conspecifics and ecologically close competing congers, Moina brachiata and M. macrocopa, which coexist in the same water body, and by larger Cladocera species (Daphnia magna) on the change of reproduction mode, specific growth rate and fecundity of M. brachiata and M. macrocopa females. The production of gametogenetic eggs in both species was detected only in waters from crowded cultures of conspecifics. The water from crowded cultures of conspecifics reduced the specific growth rate of the juvenile females of both species that later switched to gametogenesis. While it either did not affect (in M. macrocopa) or even increase (in M. brachiata) the specific growth rate of the juvenile females that later reproduced by parthenogenesis. Females of M. macrocopa released significantly fewer neonates in the water from crowded cultures of conspecifics than in all other treatments, while the fecundity of M. brachiata females was the same in all treatments. To understand the phenomenon of diapause induction under the effect of chemical cues in zooplankton, a link between laboratory tests and ecological research should be established, and the chemical composition of the signals should be determined. В© 2006 Springer Science+Business Media B.V.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dubovskaya O. P., Glushchenko L. A.
Заглавие : THE FIRST RECORDS OF SENECELLA SIBERICA VYSHKVARTZEVA 1994 (COPEPODA, CALANOIDA) IN LARGE NORILSK LAKES, PYASINA RIVER BASIN, CENTRAL SIBERIA
Колич.характеристики :8 с
Место публикации : Zool. Zhurnal: MAIK NAUKA-INTERPERIODICA PUBL, 2018. - Vol. 97, Is. 10. - С. 1264-1271. - ISSN 0044-5134, DOI 10.1134/S0044513418100057
Примечания : Cited References:26
Предметные рубрики: LIMNOCALANUS-MACRURUS
FRESH-WATER
MICHIGAN
ESTUARY
Аннотация: The large, deep, freshwater Norilsk lakes (Lake Lama, Lake Sobachye, Lake Glubokoe and Lake Keta) are located beyond the Arctic Circle, at the northwestern edge of the Putorana Plateau. They underwent a Pleistocene boreal marine transgression. A relict of that transgression, Limnocalanus macrurus Sars 1863 (Copepoda, Calanoida), presently dominates the crustacean zooplankton of these lakes. Sympatric with the native relict species L. macrurus, Senecella siberica Vyshkvartzeva 1994, was found in our zooplankton samples taken from the deep parts of lakes Lama and Sobachye in the summer-autumn of 2014-2016. Sampling was performed using a Juday net hauled vertically from a depth of 15, 20(25/30) and/or 50 m to the surface. All Senecella specimens were older copepodites, mainly CIV stage in Lama and Sobachye lakes in August and CV in Sobachye Lake in September; their abundance was low (25-2000 ind. m(-2)). They inhabited the central deeper regions of the lakes, contributing up to 7-14% to the total wet biomass of net zooplankton in 0-20 and 0-50 m strata. Previous sporadic and rather superficial samplings in these lakes missed Senecella due to its deep locations, low abundance levels and the absence of both the oldest copepodites and adults in summer.
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14.

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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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shirobokova I.M., Pechurkin N.S.
Заглавие : The effect of cannibalism intensity on net primary production and dynamics of trophic links in aquatic ecosystems
Место публикации : Advances in Space Research. - 2003. - Vol. 31, Is. 7. - С. 1737-1741. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)00112-1
Ключевые слова (''Своб.индексиров.''): biomass--ecosystems--mathematical models--photosynthesis--cannibalism intensity--space research--aquatic ecosystem--cannibalism--ecological modeling--net primary production--trophic structure--amphipoda--animal--aquaculture--article--biological model--biomass--cannibalism--daphnia--ecosystem--food chain--microclimate--phytoplankton--zooplankton--amphipoda--animals--aquaculture--biomass--cannibalism--daphnia--ecological systems, closed--ecosystem--food chain--models, biological--phytoplankton--zooplankton
Аннотация: A mathematical model was used to investigate the effect of cannibalism intensity on the net primary production and the dynamics of trophic links in an aquatic ecosystem characterized by cannibalism at the upper trophic level. A mathematical model of an aquatic ecosystem has been constructed, with the following principal trophic links: limiting nutrient concentration, producers (phytoplankton), nonpredatory and predatory zooplankton. The model takes into account the age structure of the predator and includes two age groups (the young and adults). The adult predators are cannibals feeding on both nonpredatory zooplankton and their own young, which consume phytoplankton. It has been found that when cannibalism intensity increases above a certain level, the concentrations of both adults and the young of the predators decrease. At the same time, the concentrations of the nonpredatory zooplankton and of nutrients increase, while the biomass of producers decreases. When the cannibalism intensity is low, the net primary production of the system increases to a certain level correlated with the increase in cannibalism intensity and drops sharply when the level of consumption of young is high. There is an optimal intensity of cannibalism, at which the productivity in the photosynthesis link is maximal. В© 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Shirobokova I.M., Pechurkin N.S.
Заглавие : The effect of cannibalism intensity on net primary production and dynamics of trophic links in aquatic ecosystems
Колич.характеристики :5 с
Место публикации : SPACE LIFE SCIENCES: CLOSED ARTIFICIAL ECOSYSTEMS AND LIFE SUPPORT SYSTEMS. Ser. ADVANCES IN SPACE RESEARCH: PERGAMON-ELSEVIER SCIENCE LTD, 2003. - Vol. 31: Meeting of F4 1 Session of the 34th Scientific Assembly of COSPAR (OCT, 2002, HOUSTON, TEXAS), Is. 7. - P1737-1741. - ISBN 0273-1177, DOI 10.1016/S0273-1177(03)00112-1
Примечания : Cited References: 13
Аннотация: A mathematical model was used to investigate the effect of cannibalism intensity on the net primary production and the dynamics of trophic links in an aquatic ecosystem characterized by cannibalism at the upper trophic level. A mathematical model of an aquatic ecosystem has been constructed, with the following principal trophic links: limiting nutrient concentration, producers (phytoplankton), nonpredatory and predatory zooplankton. The model takes into account the age structure of the predator and includes two age groups (the young and adults). The adult predators are cannibals feeding on both nonpredatory zooplankton and their own young, which consume phytoplankton. It has been found that when cannibalism intensity increases above a certain level, the concentrations of both adults and the young of the predators decrease. At the same time, the concentrations of the nonpredatory zooplankton and of nutrients increase, while the biomass of producers decreases. When the cannibalism intensity is low, the net primary production of the system increases to a certain level correlated with the increase in cannibalism intensity and drops sharply when the level of consumption of young is high. There is an optimal intensity of cannibalism, at which the productivity in the photosynthesis link is maximal. (C) 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gladyshev M.I., Kolmakov V.I., Dubovskaya O.P., Ivanova E.A.
Заглавие : Studying of algae food composition of Daphnia longispina during bluegreen bloom of eutrophic pond
Колич.характеристики :3 с
Место публикации : Dokl. Akad. Nauk: MEZHDUNARODNAYA KNIGA, 2000. - Vol. 371, Is. 4. - P556-558. - ISSN 0869-5652
Примечания : Cited References: 11
Предметные рубрики: MICROCYSTIS-AERUGINOSA
CLOSED CULTIVATORS
PHYTOPLANKTON
ZOOPLANKTON
MICROALGAE
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dubovskaya O.P., Gladyshev M.I., Gubanov V.G., Makhutova O.N.
Заглавие : Study of non-consumptive mortality of Crustacean zooplankton in a Siberian reservoir using staining for live/dead sorting and sediment traps
Колич.характеристики :5 с
Место публикации : Hydrobiologia: KLUWER ACADEMIC PUBL, 2003. - Vol. 504: 4th International Conference on Reservoir Limnology and Water Quality (AUG, 2002, CESKE BUDEJOVICE, CZECH REPUBLIC), Is. 01.03.2013. - P223-227. - ISSN 0018-8158, DOI 10.1023/B:HYDR.0000008522.88010.45
Примечания : Cited References: 19
Предметные рубрики: SEASONAL DYNAMICS
MIDSUMMER DECLINE
DAPHNIA
DETRITUS
FISH
POND
Ключевые слова (''Своб.индексиров.''): cyclops vicinus--daphnia--live/dead sorting--non-consumptive mortality--sedimentation
Аннотация: We studied non-consumptive (non-predatory) mortality of Daphnia and Cyclops vicinus during four sampling seasons. Mortality estimations were based on live/dead sorting using special staining and measurements of sedimentation rates for dead individuals, depended on wind speed. Original equations were used for calculations. The estimated specific non-consumptive mortality never had biologically senseless negative values, which were often obtained on the basis of the other ways of mortality estimations, and was in a good agreement with other components of population dynamics. As found, the non-consumptive mortality was the important, often the determinant component of the zooplankton population dynamics.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dubovskaya O.P., Gladyshev M.I., Gubanov V.G., Makhutova O.N.
Заглавие : Study of non-consumptive mortality of Crustacean zooplankton in a Siberian reservoir using staining for live/dead sorting and sediment traps
Место публикации : Hydrobiologia. - 2003. - Vol. 504. - С. 223-227. - ISSN 00188158 (ISSN) , DOI 10.1023/B:HYDR.0000008522.88010.45
Ключевые слова (''Своб.индексиров.''): cyclops vicinus--daphnia--live/dead sorting--non-consumptive mortality--sedimentation--reservoirs (water)--sampling--sediment traps--non-consumptive mortality--population dynamics--biodiversity--mortality--population dynamics--reservoir--sediment trap--sedimentation--zooplankton--cladocera--copepoda--crustacea--cyclopia--cyclops--cyclops vicinus--daphnia
Аннотация: We studied non-consumptive (non-predatory) mortality of Daphnia and Cyclops vicinus during four sampling seasons. Mortality estimations were based on live/dead sorting using special staining and measurements of sedimentation rates for dead individuals, depended on wind speed. Original equations were used for calculations. The estimated specific non-consumptive mortality never had biologically senseless negative values, which were often obtained on the basis of the other ways of mortality estimations, and was in a good agreement with other components of population dynamics. As found, the non-consumptive mortality was the important, often the determinant component of the zooplankton population dynamics.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Buseva, Zhanna F., Farahani, Shabnam Bahman Gazerani, Veras, Yulia K., Kolmakova, Anzhelika A., Sushchik, Nadezhda N.
Заглавие : STOICHIOMETRIC COMPOSITION OF SESTON IN LITTORAL AND PELAGIAL ZONES OF SHALLOW LAKE OBSTERNO (BELARUS)
Колич.характеристики :7 с
Коллективы : BRFFR [17-037]
Место публикации : Dokl. Nat. Akad. Nauk Belarusi: BELARUSKAYA NAVUKA, 2018. - Vol. 62, Is. 3. - С. 304-310. - ISSN 1561-8323, DOI 10.29235/1561-8323-2018-62-3-304-310. - ISSN 2524-2431(eISSN)
Примечания : Cited References:15. - This work was partially supported by the BRFFR (grant No. (sic)17-037). We thank for the collaboration with Narach Biological Station of Belarusian State University and thank it's Director Dr. T. V. Zhukova, scientific and technological staff -E. I. Lapitskaja and E. A. Zhuravliova for their fruitfull help.
Предметные рубрики: NUTRIENT LIMITATION
PHOSPHORUS
NITROGEN
ZOOPLANKTON
CARBON
MARINE
Ключевые слова (''Своб.индексиров.''): seston--carbon--nitrogen--phosphorus--stoichiometry--littoral--pelagial--macrophyte beds
Аннотация: We estimated the seston elemental composition (C, N, P) and its ratio in pelagic and littoral zones of mesotrophic shallow Lake Obsterno during two contrasting seasons, as well as the influence of macrophyte beds on the seston stoichiometry. In the both pelagial and littoral zones in summer the C : N ratio was small, 4.62 and 7.05 respectively. But it increased slightly during autumn to 5.66 in pelagic samples against 8.33 in littoral ones. The large N : P ratio and the small phosphorus content specially in the macrophyte covered littoral zone equal to 57.7 in July against 22.47 in September suggest a high level of phosphorus limitation in the littoral locations as a possible mediated reason suppressing zooplankton abundance in summer. Our results in the both pelagial and littoral habitat showed a highly P limited situation in which the N : P ratio was larger in littoral with macrophyte than in pelagial zones. The obtained data of littoral seston stoichiometry were recorded for the first time and exceeded the classical Redfield ratio. The elemental imbalance between macrophyte covered littoral and pelagial suggest that nutrients, especially P, are more limiting in macrophyte beds in summer due to the resource competition between phytoplankton and macrophytes for nutrients, a poor food quality, low zooplankton abundance, as well as its poor taxon-specific elemental ratio in summer.
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