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1.
The results of studies of heavy metal accumulation by periphyton algae in 12 rivers of Kola Peninsula are presented. The potentiality of the use of periphyton in heavy metal monitoring in water bodies is discussed. 相似文献
2.
The coastal water bodies that separate from White Sea water area due to Kandalaksha coast rise are examined. The hydrological and hydrochemical characteristics of these water bodies are found to notably differ from these in the bays and straits connected with them. Extreme values of water temperature and salinity were recorded. High concentrations of oxygen (>20 mg/l) were recorded in the near-surface water layers and high concentrations of hydrogen sulfide (>90 mg/l) in bottom waters. The species composition of phyto- and zooplankton was found to be poor. The characteristics of enzymatic destruction in subsurface waters of lakes are an order of magnitude greater than those in White Sea open areas. 相似文献
3.
The problem of eutrophication of the surface water in the Arctic Regions is discussed. The natural hydrochemical indices of the trophic status of lakes are analyzed in connection with the landscape and physiographic features of the Kola Peninsula. The regular features of changes in the hydrochemical indices of the trophic status of lakes and the development of the process of eutrophication are analyzed in the case of subarctic Lake Imandra, which has been polluted with municipal and industrial (phosphorus-containing waste of the apatite production) wastewater for more than fifty years. Criteria are proposed for establishing and assessing water eutrophication in cold climate. 相似文献
4.
E. G. Krupa 《Water Resources》2007,34(6):712-717
Data on the Shardarinskoe Reservoir are used to assess the indicator role of zooplankton community under unstable hydrological regime. The structural characteristics of zooplankton featured significant seasonal variations. The averaged indices characterized reservoir water quality at the level of mesotrophic and eutrophic water bodies. The possible use of cyclopidas to characterize toxic pollution of water is discussed. 相似文献
5.
Changes in the quantitative and qualitative characteristics of zooplankton in Kondopoga Bay, Lake Onega, under long-term anthropogenic influence are discussed, and the effect of water pollution on changes in the zooplankton community is considered. 相似文献
6.
Griselda Chaparro María Cristina Marinone Ruben J. Lombardo María Romina Schiaffino Alice de Souza Guimarães Inés O’Farrell 《Limnologica》2011,41(4):371-381
We examined the zooplankton abundance and composition of Laguna Grande, a floodplain wetland of the Lower Paraná Basin (Argentina), during an extraordinary drought–flood cycle that affected both the environment and the biological conditions of the lake. Low waters were characterised by remarkably high conductivities and pH values, and high phytoplankton and bacterioplankton abundances with cyanobacterial blooms, while high waters showed opposite features. In relation to zooplankton, the mean abundances of all the taxonomic groups (rotifers, cladocerans, copepods, ciliates, and heterotrophic nanoflagellates) were slightly higher at low waters. Major changes were observed in the specific composition of metazooplankton: the euryhaline species assemblage that dominated in the dry warm period was replaced by several oligohaline littoral and planktonic species characteristic of the Paraná River Basin, when the water level rose. Mean species richness values at high waters doubled those of low waters and were directly correlated to water depth. Most of the rotifers of the genus Brachionus and the cladoceran Moina micrura switched from parthenogenetic to sexual reproduction during low waters, as a response to a harsh environment and crowding. We suggest that the main changes in the environmental conditions in this eutrophic floodplain lake are driven by the hydrology, which regulates the zooplankton succession. The herein described shifts in the zooplankton structure and dynamics of Laguna Grande over an extraordinary drought–flood cycle contribute to the understanding of the processes that might occur under the scenarios predicted by climate change models. 相似文献
7.
A method for determining the critical loads of acid fallout for surface waters is described. Adaptation of the method for estimating the degree of water acidification in the Kola North is demonstrated in the process of large-scale investigations carried out in this region. The limiting value of the acid-neutralizing capacity of waters needed for preventing the aquatic ecosystems from degradation is substantiated. The loads of acid fallout in 17% of 460 examined water systems are found to exceed the critical limits and create the conditions for further development of adverse processes in water systems. 相似文献
8.
A synthesis of dominant ecological processes in intensive shrimp ponds and adjacent coastal environments in NE Australia 总被引：4，自引：0，他引：4
Burford MA Costanzo SD Dennison WC Jackson CJ Jones AB McKinnon AD Preston NP Trott LA 《Marine pollution bulletin》2003,46(11):1456-1469
One of the key environmental concerns about shrimp farming is the discharge of waters with high levels of nutrients and suspended solids into adjacent waterways. In this paper we synthesize the results of our multidisciplinary research linking ecological processes in intensive shrimp ponds with their downstream impacts in tidal, mangrove-lined creeks. The incorporation of process measurements and bioindicators, in addition to water quality measurements, improved our understanding of the effect of shrimp farm discharges on the ecological health of the receiving water bodies. Changes in water quality parameters were an oversimplification of the ecological effects of water discharges, and use of key measures including primary production rates, phytoplankton responses to nutrients, community shifts in zooplankton and delta15N ratios in marine plants have the potential to provide more integrated and robust measures. Ultimately, reduction in nutrient discharges is most likely to ensure the future sustainability of the industry. 相似文献
9.
《Journal of Volcanology and Geothermal Research》2006,151(4):382-398
Mineral and thermal water chemistry from the Azores archipelago was investigated in order to discriminate among hydrochemical facies and isotopic groups and identify the major geochemical processes that affect water composition. A systematic geochemical survey of mineral and thermal water chemistry was carried out, incorporating new data as well as results from the literature. The Azores are a volcanic archipelago consisting of nine islands and samples were collected at São Miguel, Graciosa, Faial, São Jorge, Pico and Flores islands. Hydrothermal manifestations show the effects of active volcanism on several islands. Discharges are mainly related to active Quaternary central volcanoes, of basaltic to trachytic composition, but also some springs are related to older dormant or extinct volcanoes.Multivariate analysis – principal component and cluster analysis – enables classification of water compositions into 4 groups and interpretation of processes affecting water compositions. Groups 1 and 2 discharge from perched-water bodies, and mostly correspond to Na–HCO3 and Na–HCO3–Cl type waters. These groups comprise of cold, thermal (27 °C–75 °C) and boiling waters (92.2 °C–93.2 °C), with a wide TDS range (77.3–27, 145.7 mg/L). Group 3 is made of samples of dominated Na–SO4 from very acid boiling pools (pH range of 2.02–2.27) which are fed by steam-heated perched-water bodies. Group 4 is representative of springs from the basal aquifer system and corresponds to Na–Cl type fluids, with compositions dominated by seawater.Results are used to further develop a conceptual model characterizing the geochemical evolution of the studied waters. Mineral and thermal waters discharging from perched-water bodies are of meteoric origin and chemically evolve by absorption of magmatic volatiles (CO2) and by a limited degree of rock leaching. Existing data also suggest mixture between cold waters and thermal water. Water chemistry from springs that discharge from the basal aquifer system evolves by mixing with seawater; although, processes such as absorption of magmatic volatiles (CO2), rock leaching and mixture with hydrothermal waters are not excluded by the data because the actual composition of these waters deviates from that expected considering only conservative mixing between fresh and seawater. 相似文献
10.
Data of field experiments conducted in a eutrophic water body were used to assess the effect of zooplankton on microalgae blooming. The experiment was based on the use of mesocosms to isolate the components of zooplankton and ichthyofauna ecosystems. The population Daphnia longispina is shown to reduce the population of cyanobacteria Anabaenaflos-aquae by a factor of 350 as compared with the water body, thus allowing the phase of highly-transparent water to extend to the mid-summer. D. Longispina can reduce the population of Microcystis aeruginosa, which is associated with the second period of the transparent-water phase. The filtration activity of zooplankton is shown to be able to recover the quality of eutrophic water bodies. 相似文献
11.
浮游动物生态学研究进展 总被引：16，自引：3，他引：13
本文综述了近年来浮游动物生态学研究的最新进展,内容包括：长期生态学研究,浮游动物种类组成和现存量动态的研究,捕食生态研究,温度、食物等因子对浮游动物影响的研究此外,还对浮游动物分子生物学、微表层浮游动物生态学、大型水利工程和能源设施建设对水生态系和浮游动物的影响及浮游动物大规模高密度培养技术等热点问题进行了讨论． 相似文献
12.
R. V. Veselovskiy A. A. Arzamastsev V. A. Tselmovich A. M. Fetisova E. P. Kulakova 《Izvestiya Physics of the Solid Earth》2017,53(6):898-907
Based on the results of the preliminary paleomagnetic investigation of 57 Precambrian dikes of the Kola Peninsula, in 31 of them a stable monopolar component of natural remanent magnetization (NRM) is revealed (D = 353.2°, I = 53.0°, K = 58, and α95 = 3.4°). The peculiarities of the distribution of this magnetization component within the Kola Peninsula and the rock magnetic characteristics of the dikes in which this component is isolated suggest its secondary nature and relate the mechanism and formation time to the remagnetization processes which took place in the northwest of Fennoscandia about 1.8 billion years ago during the Svecofennian orogeny. The corresponding geomagnetic pole of Fennoscandia has the coordinates Plat = 54.5°, Plong = 224.0°, and A95 = 3.9° and is located in the immediate vicinity of the known Paleoproterozoic (1.9–1.7 Ga) poles of Baltica (Khramov et al., 1997; Veikkolainen et al., 2014). 相似文献
13.
The regularities in present-day variations in the wind speed vector are examined at 18 stations along the section from Kola Peninsula to the Caspian Sea. Data on long-term variations in the major climate-forming factors and climatic parameters are generalized. The statistically significant tendency toward a considerable decline in the wind speed with a maximum module and the most frequent wind speeds of zonal, mostly western, directions (this tendency has been revealed earlier for the eastern coast of the middle and southern Caspian Sea) was found to hold for the greater part of the European Russia. Possible causes of present-day climate changes and their manifestations at the regional level are analyzed. A possible mechanism of present-day climate changes is proposed 相似文献
14.
M. B. Zobkov 《Water Resources》2012,39(1):90-97
A method was developed for the search of anomalies in water chemistry with the use of desirability functions. The method allows
one to assess, in automatic mode, the degree of deviation of water chemistry from regional averages derived from field observation
data in unpolluted water bodies in the region. The method was used to identify anomalous deviations of water ionic composition
and N forms from regional averages for some water bodies in the Republic of Karelia (the Kenti River system, water bodies
of Zaonezhskii Peninsula, Onega Lake), caused by both anthropogenic effect and specific natural conditions of water chemistry
formation. 相似文献
15.
16.
T. I. Moiseenko L. V. Razumovskii N. A. Gashkina A. V. Shevchenko V. L. Razumovskii A. S. Mashukov V. Yu. Khoroshavin 《Water Resources》2012,39(5):576-589
The results of studying four mountain lakes in different climatic zones (in regions of the Kola North and the Western Caucasus) are given. Original methods of paleoecological reconstruction developed by the authors have been used to characterize the main trends and rates in environmental changes at historical scale (by geochemical composition and diatom complexes in bottom sediment layers). Similar processes of modern water enrichment by metals (especially, Cd and Pb) have been determined in the examined lakes. Trends in changes in acid-base balance in The Kola North lakes since the late XIX century have been identified, reflecting the effect of transboundary transport of acid-forming substances from industrial Europe. Studies of diatom complexes in Caucasian lakes showed a rise in the mean annual temperature of lake water during the XX century supposedly by 1.5°C. 相似文献
17.
Materials of long-term studies of the concentration and distribution of N forms (NH4+, NO3−, NO2−, Norg) in precipitation, surface water and groundwater are generalized. Precipitation was found to be the main source of N compounds
input into these waters. The effect of anthropogenic factors is local and does not influence the concentration and distribution
of N forms in most water bodies that serve as wastewater recipients. The N forms dominating in precipitation are NO3− and N H4+; Norg dominates in most surface water bodies, and NO3− dominates in groundwater. The median concentrations of Ntot in clear surface and subsurface waters are similar. The obtained characteristics of the concentrations and distribution of
N forms in natural waters of Karelia can be used for other water bodies in the humid zone. 相似文献
18.
P. A. Lozovik 《Water Resources》2013,40(6):631-639
A classification of surface waters of humid zone by its humus content, alkalinity, and trophic status has been developed basing on the acid-base equilibrium of those waters, governed by two systems: humus and carbonate, which enabled the geochemical classes of water to be established more objectively than by expert systems. An integrated estimate of natural water quality is given with the use of quality points by individual characteristics. For water bodies subject to anthropogenic impact, the degree of their pollution is given in accordance with water pollution index, which is calculated by the main standardized components, taking into account their geochemical background level and the values of MAC for water bodies used for fishery. 相似文献
19.
The results of the analysis of diatoms from 25-cm-long cores of bottom sediments of Lake Imandra (the Kola Peninsula) are presented. Three phases of the human-induced transformation of the lake are identified on the basis of these data. 相似文献
20.
《Physics of the Earth and Planetary Interiors》1987,45(2):149-160
The electromagnetic migration method, based on principles analogous to those of seismic migration, is developed.The concept of migrated fields is based on the Stratton-Chu type integrals, written in reverse time for the observed electromagnetic fields. Four types of migrated fields, which form a system of migration transformations of the transient electromagnetic field, are introduced.Study of the properties of the migrated fields by means of theoretical and model examples makes it possible to determine the optimal parameters of the migration procedure in which the anomalous field sources are localized by means of migration transformation.Information about the experiment using the MHD-generator (experiment ‘Chibini’) carried out on the Kola Peninsula to study the geoelectrical structure of the Earth's crust and upper mantle is included. The electromagnetic migration method for the interpretation of MHD-sounding data recorded on the Kola Peninsula, along a profile crossing the mineral-rich region of the Imandra-Varzuga structure, permits us to determine the location of a conducting zone at the depth of 10 km in the Earth's crust. 相似文献