Global Mercury Assimilation by Vegetation
| العنوان: | Global Mercury Assimilation by Vegetation |
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| المؤلفون: | Daniel Obrist, Jun Zhou |
| المصدر: | Environmental Science & Technology. 55:14245-14257 |
| بيانات النشر: | American Chemical Society (ACS), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Biomass (ecology), Biogeochemical cycle, Lichens, 010504 meteorology & atmospheric sciences, Biome, chemistry.chemical_element, Bryophyta, Mercury, General Chemistry, Vegetation, 010501 environmental sciences, 15. Life on land, Plant litter, 01 natural sciences, Mercury (element), Deposition (aerosol physics), chemistry, 13. Climate action, Environmental chemistry, Soil water, Environmental Chemistry, Environmental science, Ecosystem, Environmental Monitoring, 0105 earth and related environmental sciences |
| الوصف: | Assimilation of mercury (Hg) by vegetation represents one of the largest global environmental Hg mass fluxes. We estimate Hg assimilation by vegetation globally via a bottom-up scaling approach using tissue Hg concentrations synthesized from a comprehensive database multiplied by respective annual biomass production (NPP). As global annual NPP is close to annual vegetation die-off, Hg mass associated with global NPP approximates the transfer of Hg from plants to soils, which represents an estimate of vegetation-mediated atmospheric deposition. Annual vegetation assimilation of Hg from combined atmospheric and soil uptake is estimated at 3062 ± 607 Mg yr-1, which is composed of 2491 ± 551 Mg yr-1 from aboveground tissue uptake and 571 ± 253 Mg yr-1 from root uptake. Assimilation of atmospheric Hg amounts to 2422 ± 483 Mg yr-1 when considering aboveground tissues only. Atmospheric assimilation increases to 2705 ± 504 Mg yr-1 when considering that root Hg may be partially derived from prior foliar uptake and transported internally to roots. Estimated atmospheric Hg assimilation by vegetation is 54-137% larger than the current model and litterfall estimates, largely because of the inclusion of lichens, mosses, and woody tissues in deposition and all global biomes. Belowground, about 50% of root Hg was taken up from soils with currently unknown ecological and biogeochemical consequences. |
| تدمد: | 1520-5851 0013-936X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::610603b336a1d7ecfd7d4ef5f6ba1c89 https://doi.org/10.1021/acs.est.1c03530 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....610603b336a1d7ecfd7d4ef5f6ba1c89 |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 15205851 0013936X |
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