Participation of Small Mammals in the Biogenic Transit of Trace Elements under Chemical Pollution of the Environment

IF 0.7 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS

Geochemistry International Pub Date : 2023-10-25 DOI:10.1134/S0016702923100099

S. V. Mukhacheva, V. S. Bezel’

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Abstract—The paper considers the participation of small mammals (SM) in the migration of essential (Cu, Zn) and toxic (Cd, Pb) trace elements (TEs) in forest ecosystems under conditions of severe industrial pollution of the environment (1990–2000) by a large copper smelter (Middle Urals, Russia) and after a significant reduction of its emissions (2010–2019). The peculiarity of transit food flows (TFF) in the pollution gradient was determined by the composition and abundance of animals of different trophic groups (phytophages, mixophages, zoophages), as well as the specifics of their diet. The reduction of emissions was accompanied by positive changes in the SM communities expressed in an increase in the abundance of some species and structural rearrangements of trophic groups (TG), which led to partial changes in the composition and amount of food consumed, as well as the concentrations of TEs in them. By the end of the observation period in the background zone, the animal-controlled TFFs remained stable for most TEs (Cu, Zn, Cd), and decreased by a factor of 2 for Pb, but not as a result of reduced emissions. At the polluted areas, the TFF value has not changed for Zn, has increased for Cd, and has decreased for Cu and Pb. It was concluded that in the taiga zone the main contribution to the dynamics of biogenic TEs flows in time and space was made by a group of mixophages that dominated in the pollution gradient.

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环境化学污染下小型哺乳动物参与微量元素的生物转运

摘要——本文考虑了小型哺乳动物（SM）在大型铜冶炼厂（俄罗斯中乌拉尔）严重工业污染环境的条件下（1990-2000年），以及在排放量显著减少后（2010-2019年），参与森林生态系统中必需（Cu，Zn）和有毒（Cd，Pb）微量元素（TE）的迁移。污染梯度中过境食物流（TFF）的特性取决于不同营养群（植食性动物、混合食性动物、浮游动物）的组成和丰度，以及它们的饮食特点。排放量的减少伴随着SM群落的积极变化，表现为一些物种的丰度增加和营养群的结构重排，这导致食物的组成和消耗量以及其中TE的浓度发生部分变化。在背景区的观察期结束时，动物控制的TFF对大多数TE（Cu、Zn、Cd）保持稳定，对Pb降低了2倍，但不是排放减少的结果。在污染区，Zn的TFF值没有变化，Cd的TFF值更高，Cu和Pb的TFF降低。结果表明，在针叶林地区，对生物TEs在时间和空间上流动的动力学的主要贡献是由一组在污染梯度中占主导地位的混合食管。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geochemistry International 地学-地球化学与地球物理

CiteScore

1.60

自引率

12.50%

发文量

审稿时长

1 months

期刊介绍： Geochemistry International is a peer reviewed journal that publishes articles on cosmochemistry; geochemistry of magmatic, metamorphic, hydrothermal, and sedimentary processes; isotope geochemistry; organic geochemistry; applied geochemistry; and chemistry of the environment. Geochemistry International provides readers with a unique opportunity to refine their understanding of the geology of the vast territory of the Eurasian continent. The journal welcomes manuscripts from all countries in the English or Russian language.