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Trace element composition of woody vegetation in mongolian citiesтезисы доклада
- Авторы: Kosheleva N.E., Kasimov N.S., Sorokina O.I., Timofeev I.V., Kisselyova T.M.
- Сборник: Biogenic-abiogenic interactions in natural and anthropogenic systems. V International Symposium
- Тезисы
- Год издания: 2014
- Место издания: VVM Publishing Ltd Saint-Petersburg
- Первая страница: 127
- Последняя страница: 128
- Аннотация: The study aims to evaluate the changes of trace element (TE) content in urban vegetation associated with emissions of industry, heating power complex, traffic and mining of non-ferrous metals. For environmental and geochemical assessment of woody species about 160 samples of poplar leaves and 44 samples of larch needles were collected in Mongolian cities and their suburbs during 2010-2013. The concentrations of Mn, Fe and 20 the most dangerous TEs in the samples were measured using ICP method and compared with the background values to display the anthropogenic disturbance of chemical composition of Populus laurifolia and Larix sibirica. The study areas included two large multi-industrial cities (Ulaanbaatar and Darkhan) and a city with mining and processing copper and molybdenum ore (Erdenet). To identify regional geochemical features of background plants their TE composition was compared with the TE concentrations in annual world biomass gain (Dobrovol’sky, 1998). For urban plants growing in different land-use zones enrichment factors relative to background values were calculated. Ecological state of trees was diagnosed via ratios Fe/Mn and Pb/Mn. Changes of TE contents in leaves and needles due to the air and soil pollution were assessed using the coefficient of biogeochemical transformation Zv, which reflected the disruption of normal ratio between TEs in plant organs (Kosheleva et al., 2012).
- Добавил в систему: Кошелева Наталья Евгеньевна