Limnology

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limnology

[lim′näl·ə·jē]
(ecology)
The science of the life and conditions for life in lakes, ponds, and streams.

Limnology

 

the science that studies inland bodies of water with a slow water exchange (lakes and reservoirs) and the interrelated physical, chemical, and biological processes occurring in them. Limnology is one of the geographic sciences. In studying bodies of water, limnology uses the methods of hydrobiology, hydrochemistry, hydrophysics, geomorphology, geobotany, meteorology, and other sciences.

The main task of limnology is integrated research on the development of bodies of water and on the geological, physical, chemical, and biological processes whose interaction in bodies of water and their drainage systems determines the particular features of lakes and reservoirs and their regime. To this end, limnology studies the origin, dimensions, structure, and transformation of the basins and shores of bodies of water; the structure and composition of the bottom deposits; the physical and chemical properties of the water masses formed in the drainage area and in the body of water itself; the structure and dynamics of the water masses; the water and thermal balance of bodies of water; fluctuations in water level; water movement, including wave motion, currents, wind drifts, seiche, and the convective and dynamic mixing of water; and thermal and ice conditions. Limnology also studies the composition, concentration, and balance of suspended and dissolved mineral and organic matter; the seasonal cycles in the development and interaction of water organisms, such as plankton, benthos and nekton; the productivity of aquatic communities and their role in transforming the organic matter in bodies of water; and the influence of lakes and reservoirs on the drainage process. In addition to studying the large and economically important lakes and reservoirs, limnologists have done important work in describing and classifying the numerous small bodies of water.

Data on the stratigraphy of lake deposits and fluctuations in lake levels are used for studying climatic changes and the hydrologic cycles in earlier periods, as well as other questions of general physical geography. Limnology uses material obtained from observations made on expeditions and at lake stations, posts, and hydrometeorological observatories. Also employed are aerial, surveying; electrometric, photometric, isotopic, and other precise research methods; interdisciplinary (hydrological, hydrochemical, and hydrobiological) surveying of lakes and reservoirs; and physical and mathematical modeling of the processes occurring in bodies of water.

The founder of limnology was the Swiss scientist F. Forel, who conducted long-term studies, chiefly of Lake Geneva, and who wrote the first handbook on limnology in 1901. Important contributions to the development of limnology have been made by the Russian scientists D. N. Anuchin, L. S. Berg, G. Iu. Vereshchagin, S. I. Kuznetsov, I. V. Molchanov, S. D. Muraveiskii, and L. L. Rossolimo and by the foreign scientists E. Berge, A. Thienemann, E. Naumann, W. Halbfass, F. Ruttner, C. H. Mortimer, and G. E. Hutchinson.

Theoretical and applied problems of limnology are being worked out in research institutes and laboratories in more than 40 countries. In the USSR important work is being done at the Limnology Institute and the Institute for the Biology of Inland Waters of the Academy of Sciences of the USSR, the Limnology Institute of the Siberian Division of the Academy of Sciences of the USSR, the State Hydrological Institute and the Hydrochemical Institute (GUGMS), and the institutes and laboratories of several ministries and universities. Limnological research is published in special collections and journals, notably Izvestiia Vsesoiuznogo geograficheskogo ob-va (Proceedings of the All-Union Geographic Society, published since 1865), Meteorologiia i gidrologiia (Meteorology and Hydrology, since 1950), Gidrobiologicheskii zhurnal (Hydrobiological Journal; Kiev, since 1969), Limnology and Oceanography (Baltimore, since 1956), and Archiv für Hydrobiologie (Stuttgart, since 1906). International limnological congresses and symposiums have played an important role in the development of limnology. They have been convened regularly since 1922 by the International Association of Theoretical and Applied Limnology. The third (1925) and 18th (1971) congresses were held in the USSR. Symposiums on lake hydrology are also organized by the International Association of Hydrological Sciences. The biological approach that predominated in limnology for a long time is giving way to interdisciplinary research. The balance principle has been accepted in studying the conversion of matter and energy in a body of water. This principle has played a crucial role in working out recommendations for the most efficient use of lakes and reservoirs and for predicting potential changes in hydrological, hydrochemical, and biological conditions caused by the use of these bodies of water. The achievements of limnology are used in a number of economic sectors, including water supply, fisheries, water transport, hydraulic power engineering, irrigation, the mining of minerals, and medicine, as well as in organizing recreation for the working people. Because of the pollution of lakes and reservoirs and their growing eutrophication, limnology has begun to focus on problems of evaluating, predicting, and protecting the quality of water in lakes and reservoirs.

REFERENCES

Forel, F. A. Rukovodstvo po ozerovedeniiu. St. Petersburg, 1912. (Translated from German.)
Berg, L. S. “Sovremennoe sostoianie i zadachi ozerovedeniia ν SSSR.” Izv. AN SSSR: Ser. geologicheskaia, 1945, no 1.
Lepneva, S. G. “Zhizn’ ν ozerakh.” In Zhizn’presnykh vod SSSR, vol. 3. Moscow-Leningrad, 1950.
Bogoslovskii, B. B. Ozerovedenie. Moscow, 1960.
Zaikov, B. D. Ocherki po ozerovedeniiu, parts 1–2. Leningrad, 1955–60.
Muraveiskii, S. D. Reki i ozera. Moscow, 1960.
Hutchinson, G. E. Limnologiia. Moscow, 1969. (Translated from English.)
Welch, P. S. Limnology, 2nd ed. New York-Toronto-London, 1953.

B. B. BOGOSLOVSKII and K. K. EDEL’SHTEIN

References in periodicals archive ?
The limnologist's work narrative is drawn from my own notebooks, e-mails, and memories relating to the time spent studying the lake from Australia in 2008 and 2009 and then again, more reflexively, between 2010 and 2012.
Limnologists' goals often relate to maintaining natural ecosystems or to understanding the potential impact of an activity, such as building houses in a wetland area.
The Alaskan landscape: An introduction for limnologists. In: Milner, A.M., and Oswood, M.W., eds.
Although limnologists have steadfastly maintained that LSC has "no discernable impact" on Cayuga Lake and is equivalent to only four to five hours of sunlight a year, many residents feel betrayed that the University is using their lake as a guinea pig for the world's first inland lake cooling project.
Forel was the founder of limnology, which he described as "the oceanography of lakes." Limnologists have played an important role in the history of the development of the concept of ecosystem; lakes are very clearly defined entities, and their relative independence makes them very suitable for ecological studies.
The last point suggests that Na is an essential element for such macrophytes, a possibility that apparently has not been addressed by limnologists or plant physiologists.
DI is similar to measures used by limnologists to quantify zooplankton feeding rates (e.g., Dodson 1975).
Vegetation is addressed by ecologists, limnologists, and marine biologists; animals and wildlife have their appropriate investigators: animal ecologists, ethnologists, fish and wildlife scientists.
Unfortunately, it is still too early to know whether the results of all this collaboration will prove to be an "exceptional achievement." The earlier experiences of terrestrial ecologists and limnologists in the International Biological Program showed clearly that team research does not necessarily produce profound results.
Limnologists, geographers, geologists, ethnic specialists, agricultural and soil specialists, experts on air and water pollution, engineers, and forestry experts were to be included in the group.
By comparing the productivity and chlorophyll levels of lakes receiving different rates of nutrient input, it was possible for limnologists to develop rather specific operational definitions for lakes that were considered oligotrophic (slightly productive), mesotrophic (moderately productive), eutrophic (highly productive), and hypertrophic or dystrophic (so productive that normal lake trophic structure and biogeochemical cycles were severely disturbed).
Most limnologists would agree that although many sophisticated chemical analyses are available for assessing the productivity of freshwaters, biological tests are necessary for an effective evaluation.