Effects of mining industry waste waters on a shallow lake ecosystem in Karelia, north-west Russia

Holopainen, Ismo J.; Holopainen, Anna‐Liisa; Hämäläinen, Heikki; Rahkola-Sorsa, Minna; Tkatcheva, Victoria; Viljanen, Markku

doi:10.1023/b:hydr.0000008554.28228.14

Cited by 23 publications

(10 citation statements)

References 18 publications

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“…In the Niger Delta, conversion to agricultural lands is minimal, but conversion for urbanisation, that is wetland reclamation for residential, industrial and other developments, is prevalent. In addition, the Niger Delta is similar to other mineral-rich wetland ecosystems where mining activities are a pressure (Castilla and Nealler 1978;Parulekar et al 1986;Holopainen et al 2003). We also find that, for the most part, the principal pressures are those which do not derive directly from local community activity, which must go some way to explain why these communities perceive themselves as 'victims' of environmental change in the delta.…”

Section: Discussionmentioning

confidence: 58%

The Niger Delta wetlands: threats to ecosystem services, their importance to dependent communities and possible management measures

Adekola

Mitchell

2011

International Journal of Biodiversity Science, Ecosystem Servic

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The Niger Delta wetlands are changing rapidly, raising concern for the wetlands' health and for communities relying upon its ecosystem services. Knowledge on ecosystem service provision is important for effective ecosystem and livelihoods management, but is currently lacking for the Niger Delta. We synthesised literature and used the 'Drivers-pressure-state-impact-response' (DPSIR) framework to structure information on changes in the wetlands' ecosystem services and implications for dependent communities. The wetlands' ecosystem services are being eroded through oil and gas exploration, dredging, invasive plant infestation and wetland reclamation. This is exacerbated by rising demand for oil, population growth and weak governance. Mass fish migration, water pollution and reduction of wetland area are also evident, impacting ecosystem services and traditional livelihood systems. This has caused poverty; people have to buy goods that previously could be obtained from the wetlands. Effective wetland management will be aided by: recognition of ecosystem services' contributions to community well-being; understanding how benefits are distributed over time, space, stakeholder; and how these changes in response to pressures. Since key pressures in the wetland are anthropogenic, understanding the role of institutions in relation to the Niger Delta's ecosystem services is imperative.

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Section: Discussionmentioning

confidence: 58%

The Niger Delta wetlands: threats to ecosystem services, their importance to dependent communities and possible management measures

Adekola

Mitchell

2011

International Journal of Biodiversity Science, Ecosystem Servic

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“…In this context, iron-ore mines act as important sources of major metals, mainly Fe and Mn, but also associated trace metals into the environment (Ratha and Venkataraman 1995;Wong 1981;Zabowski et al 2001). Studies from temperate climates have shown that iron-ore mining and its tailing wastewaters usually show high levels of dissolved ions and particulate suspended matter, thus changing the water chemistry (Holopainen et al 2003) and the bioavailability of metals.…”

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confidence: 99%

Effects of iron-ore mining and processing on metal bioavailability in a tropical coastal lagoon

et al. 2008

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Background, aim, and scope In water systems, water quality and geochemical properties of sediments determine the speciation of trace metals, metal transport, and sediment-water exchange, influencing metal availability and its potential effects on biota. Studies from temperate climates have shown that iron-ore mining and tailing wastewaters, besides being a source of trace metals, usually show high levels of dissolved ions and particulate suspended matter, thus having the potential of indirectly changing metal bioavailability. For the first time in the tropics, we identified the effects of iron-ore mining and processing on metal bioavailability in a coastal lagoon. With an extensive sampling scheme, we investigated the potential sources of metals; the links among metal levels in water, sediments, and invertebrates; and the contrasting effects on metal speciation and bioavailability. Methodology The metals Fe, Mn, Al, Cr, Zn, Cu, Ni, Pb, Cd, Hg, and As were measured in water, sediments (surface and profiles), and invertebrates from Mãe-Bá Lagoon and in the sites directly influenced by the mining operations (tailing dams and nearby rivers). In addition, samples from two other lagoons, considered pristine, were analyzed. The study area is located in the southeast of Brazil (Iron Quadrangle Region and a coastal area of Espírito Santo State). General water characteristics included pH, dissolved organic carbon, alkalinity, and anion composition. Water metal speciation was assessed by a speciation model (Chemical Equilibria in Aquatic Systems). Grain-size distribution, organic carbon, carbonate, and acid volatile sulfide (AVS) were determined in sediments. Statistical methods included comparison of means by Mann-Whitney test, ordination and correlation analyses, and analysis of regression for geochemical normalization of metals with grain size. Results and discussion The dissolved metal concentrations, the total metal levels in sediments, and the normalization based on the fine sediment fraction showed that the mining operations constitute potential sources of Fe, Mn, Cr, Cu, Ni, Pb, As, and Hg to Mãe-Bá Lagoon. However, trace metal availability was reduced because of increased pH, hardness, and sulfide content (356 μmol/g) in the sites influenced by the mining. The lagoon showed similar water chemistry as in the mining sites, with metal bioavailability further decreased by the presence of dissolved organic carbon and chloride. Although AVS levels in the lagoon were low (0.48-56 μmol/g), metal bioavailability was reduced because of the presence of organic matter. Metal levels in invertebrates confirmed the predicted low metal bioavailability in Mãe-Bá Lagoon. The lagoon was considered moderately contaminated only by Hg and As. Conclusions The iron-ore mining and processing studied here constitute potential sources of metal pollution into the tropical lagoon. Contrary to expectations, however, it also J Soils Sediments

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“…Investigations from water tropical climates have shown that Iron ore tailings usually show higher concentrations of dissolved Iron and particulate suspended matter, thus changing the chemistry of water, sediment and bio accumulation [18]. TSM values range from 86.5 (st.13) to 280.5 mg/l (st.10) ( Table 1).…”

Section: Resultsmentioning

confidence: 99%

Impact of Iron Ore Tailing on Foraminifera of the Uppateru River Estuary, East Coast of India

Jayaraju¹,

Reddy²,

Reddy³

et al. 2011

JEP

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Benthic foraminiferal assemblages have been used to determine the effects of Iran ore tailing pollution on the marine environment. The present paper attempts to unveil pollution impact as responded by foraminiferal species of Uppateru estuary. The faunal data thus generated is compared with earlier data sets for possible adverse effects. There has been substantial reduction in total foraminiferal number (TFN), from 574 in 2006 to 213 in 2008 species (st.no.3) per10 gram sediment. Even the total species number (TSN) decreased from 27 in (st.no.8) 2006 to 8 (st.no.1) in 2008. Ammonia accounted for its share (68%), followed by Elphidium (7.4%) and Quinqueloculina (6.5%). These genera are considered to be robust and opportunistic type in the study area. This faunal variation in terms of density (TFN) may be owing to the pollution caused by iron ore tailing. This study also supports the view that benthic foraminiferal biota can be used as a tool to monitor marine pollution in general and estuarine environment in specific

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Effects of mining industry waste waters on a shallow lake ecosystem in Karelia, north-west Russia

Cited by 23 publications

References 18 publications

The Niger Delta wetlands: threats to ecosystem services, their importance to dependent communities and possible management measures

The Niger Delta wetlands: threats to ecosystem services, their importance to dependent communities and possible management measures

Effects of iron-ore mining and processing on metal bioavailability in a tropical coastal lagoon

Impact of Iron Ore Tailing on Foraminifera of the Uppateru River Estuary, East Coast of India

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