期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 760, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.143358
关键词
Environmental risk assessment; Ecosystem integrity; Heavy metals; Potentially toxic elements; South African savanna biome; Wildlife management
资金
- Department of Science and Technology [64756]
- National Research Foundation SARChI chair of Mammalian Behavioural Ecology and Physiology, South Africa [64756]
- University of Pretoria Post-graduate Scholarship Programme
- Tswalu Foundation, South Africa
This study conducted the widest range assessment of trace elements in protected terrestrial wildlife reserves in the South African savannah biome, revealing the presence of various potentially toxic elements in sediment and vegetation, indicating the potential deleterious consequences of environmental contamination with trace elements.
The savannah biome supports unique biodiversity and provides a multitude of ecosystem services. Defining background concentrations for trace elements in the environment is beneficial for the determination of nutrient deficiencies/hotspots and for the management of pollution. Sediment and corresponding vegetation samples were collected around 48 surface water points in two savannah wildlife areas for assessment and comparison of 20 trace elements using ICP-MS. Site-specific and matrix-specific differences were evident for essential B, Co, Cu, Fe, Mn, Mo, Ni, Se and Zn, potentially toxic As, Cd, Cr, Hg, Pb and V and additional elements Al, Ba, Sb, Sn and Sr analysed. Sediment and vegetation from all sampled locations at both sites contained single or multiple potentially toxic elements at various concentrations. Although the presence of all elements can be linked to underlying geology and geochemistry specific to each site, evidence of anthropogenic cause was also evident at both sites. This paper covers the widest range of trace elements assessed in protected terrestrial wildlife reserves in the South African savannah biome to date and highlights the potential for deleterious consequences of trace element contamination of the environment. (C) 2020 Elsevier B.V. All rights reserved.
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