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| Titel |
The two-layer geochemical structure of modern biogeochemical provinces and its significance for spatially adequate ecological evaluations and decisions |
| VerfasserIn |
Elena Korobova, Sergey Romanov |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250087753
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| Publikation (Nr.) |
 EGU/EGU2014-1811.pdf |
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| Zusammenfassung |
| Contamination of the environment has reached such a scale that ecogeochemical situation in
any area can be interpreted now as a result of the combined effect of natural and
anthropogenic factors. The areas that appear uncomfortable for a long stay can have natural
and anthropogenic genesis, but the spatial structure of such biogeochemical provinces is in
any case formed of a combination of natural and technogenic fields of chemical elements.
Features of structural organization and the difference in factors and specific time of
their formation allow their separation on one hand and help in identification of
areas with different ecological risks due to overlay of the two structures on the
other.
Geochemistry of soil cover reflects the long-term result of the naturally balanced
biogeochemical cycles, therefore the soil geochemical maps of the undisturbed areas may
serve the basis for evaluation of the natural geochemical background with due regard
to the main factors of geochemical differentiation in biosphere. Purposeful and
incidental technogenic concentrations and dispersions of chemical elements of
specific (mainly mono- or polycentric) structure are also fixed in soils that serve as
secondary sources of contamination of the vegetation cover and local food chains.
Overlay of the two structures forms specific heterogeneity of modern biogeochemical
provinces with different risk for particular groups of people, animals and plants
adapted to specific natural geochemical background within particular concentration
interval.
The developed approach is believed to be helpful for biogeochemical regionalizing of
modern biosphere (noosphere) and for spatially adequate ecogeochemical evaluation of the
environment and landuse decisions. It allows production of a set of applied geochemical maps
such as: 1) health risk due to chemical elements deficiency and technogenic contamination
accounting of possible additive effects; 2) adequate soil fertilization and melioration with
due regard to secondary redistribution of chemical elements; 3) selection of areas
adequate for the short- and long-term ecogeochemical monitoring; 4) selection of
areas as global and regional biogeochemical standards. The approach was used to
evaluate contribution of stable iodine deficiency and radioactive iodine fallout to
distribution of thyroid diseases among population of the Bryansk region [1], to
evaluate natural transformation of the initially uniform spatial structure of N, P,
K in agricultural fields [2] and radiocesium in forest and flood plain landscapes
[3].
The work has been partly supported by the Russian Foundation for Basic Research
(grants 07-05-00912; 10-05-01148; 13-05-00823).
References
Korobova E.M., S.L. Romanov, A.I. Kuvylin, E.I. Chesalova, V.Yu. Beriozkin,
I.V. Kurnosova. Modern natural and technogenic iodine biogeochemical
provinces: spatial structure and health effects. Goldschmidt 2011, Prague,
August 14-19, 2011. Mineralogical Magazine, 75, 3, June 2011, Goldschmidt
abstracts 2011, www.minersoc.org, 1224.
Romanov S.L. Patterns of the structure of nitrogen, phosphorous and potassium
fields in landscape systems of Belorussia. Thesis. Moscow, Moscow State
University, 1991, 20 p.
Korobova E.M., Romanov S.L., 2009. A Chernobyl 137Cs contamination study
as an example for the spatial structure of geochemical fields and modeling of the
geochemical field structure. Chemometrics and Intelligent Laboratory Systems
99, 1–8. |
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