دورية أكاديمية
Biogeochemical specialization of macrophytes and their role as a biofilter in the Selenga delta
| العنوان: | Biogeochemical specialization of macrophytes and their role as a biofilter in the Selenga delta |
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| المؤلفون: | G. L. Shinkareva, M. Yu. Lychagin, M. K. Tarasov, J. Pietroń, M. A. Chichaeva, S. R. Chalov |
| المصدر: | Geography, Environment, Sustainability, Vol 12, Iss 3, Pp 240-263 (2019) |
| بيانات النشر: | Lomonosov Moscow State University, 2019. |
| سنة النشر: | 2019 |
| المجموعة: | LCC:Geography (General) |
| مصطلحات موضوعية: | biogeochemistry, deltaic environment, heavy metals and metalloids in aquatic systems, macrophytes, hyperspectral images, Geography (General), G1-922 |
| الوصف: | This study aims to evaluate the biofiltration ability of higher aquatic vegetation of the Selenga delta as a barrier for heavy metals and metalloids (HMM) flows into the Lake Baikal. Main aquatic vegetation species have been collected from deltaic channels and inner lakes: Nuphar pumila, Potamogeton perfoliatus, P. pectinatus, P. natans, P. friesii, Butomus umbellatus, Myriophyllum spicatum, Ceratophyllum demersum, Phragmites australis. Analysis of the obtained data showed that regardless of the place of growth hydatophytes spiked water-milfoil (M. spicatum) and the fennel-leaved pondweed (P. pectinatus) most actively accumulate metals. Opposite tendencies were found for helophytes reed (Ph. australis) and flowering rush (B. umbellatus), which concentrate the least amount of elements. This supports previous findings that the ability to concentrate HMM increases in the series of surface – floating – submerged plants. Regarding river water, the studied macrophyte species are enriched with Mn and Co, regarding suspended matter – Mo, Mn and B, regarding bottom sediments – Mn, Mo and As. We identified two associations of chemical elements: S-association with the predominant suspended form of migration (Be, V, Co, Ni, W, Pb, Bi, Mn, Fe and Al) and D-association with the predominant dissolved form of migration (B, U, Mo, Cr, Cu, Zn, As, Cd, Sn and Sb). Due to these associations three groups of macrophytes were distinguished – flowering rush and reed with a low HMM content; small yellow pond-lily and common floating pondweed with a moderate accumulation of S-association and weak accumulation of D-association elements; and clasping-leaved pondweed, fennel-leaved pondweed, and pondweed Friesii accumulating elements of both S and D groups. The results suggest that macrophytes retain more than 60% of the total Mn flux that came into the delta, more than 10% – W, As, and from 3 to 10% B, Fe, Co, Mo, Cd, V, Ni, Bi, Be, Cu, Zn, Cr, U, Al. The largest contribution is made by the group of hydatophytes (spiked water-milfoil and pondweed), which account for 74 to 96% of the total mass of substances accumulated by aquatic plants. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2071-9388 2542-1565 |
| Relation: | https://ges.rgo.ru/jour/article/view/827; https://doaj.org/toc/2071-9388; https://doaj.org/toc/2542-1565 |
| DOI: | 10.24057/2071-9388-2019-103 |
| URL الوصول: | https://doaj.org/article/85a0a8117f514319b81bb36660199f11 |
| رقم الأكسشن: | edsdoj.85a0a8117f514319b81bb36660199f11 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20719388 25421565 |
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| DOI: | 10.24057/2071-9388-2019-103 |