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Дата изменения: Tue Jan 10 13:08:32 2012 Дата индексирования: Mon Oct 1 23:56:45 2012 Кодировка: |
The chapter reviews the available literature about the adverse effects of excess nickel on plants and their
adaptation mechanisms. The study is focused on forest ecosystems exposed to extreme air pollution from the
nickel-processing industry in Northern Fennoscandia. Long-term deposition of heavy metals and sulphur has
caused strong soil contamination and severe damage to trees and ground vegetation, their structure, composition
and chemistry. Tree leaves, branches and bark as well as dwarf shrubs, mosses and lichens show clearly elevated
concentrations of nickel and copper in the surroundings of the smelters. Multivariate analyses show that changes
in the element composition of plants depend both on air pollution and on natural factors. Besides direct input
of pollutants from atmosphere, soil contamination and nutritional disturbance contribute significantly to the
observed changes. Despite decline in emissions, extreme pool of heavy metals accumulated in surface soils is
expected to influence plant metabolism and chemistry over a long period of time.
For soil scientists, ecologists, biologists, biogeochemists and forestry specialists.
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