Distribution of metals and arsenic in soils of Central Victoria (Creswick-Ballarat), Australia
- Authors: Sultan, Khawar
- Date: 2007
- Type: Text , Journal article
- Relation: Archives of Environmental Contamination and Toxicology Vol. 52, no. 3 (2007), p. 339-346
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- Description: A soil-sampling campaign was conducted to identify and map heavy-metal contamination in the Ballarat-Creswick area of Central Victoria, Australia, with respect to mining activities and natural background levels in soils. The distribution and concentrations of both lithology- (Fe, Al, and Mn) and pollution-sensitive elements (Zn, As, Pb, Cu, Cr, Ni, and Co) were documented in surface soils (approximately 0 to 10 cm, fraction <2 mm, n = 85). The total heavy-metal and metalloid contents in soils decreased in the order Fe >> Al >> Zn > Mn >> As > Pb > Cu ≈ Ni ≈ Cr > Co. Mean levels of Zn (273 mg/kg) and As (39 mg/kg) in soils were well above normal global ranges and could be of local importance as a source of contamination. Extreme soil levels of Ni, Cr, Pb, and Fe were found in old mining waste material and pointed to the anthropogenic influence on the environment. Most of the measured elements showed marked spatial variations except Co. As contents were significantly higher than the tolerable level (ANZECC (1992) guidelines), with values up to 395.8 mg/kg around the mine tailings site. Mn soil contents were strongly associated with Co and Ni contents in most soils. High Fe contents (average approximately 41,465 mg/kg) in soils developed on basalt bedrock were correlated with Zn contents (average 400 mg/kg), and it is highly likely that Fe-oxides serve as sinks for Zn under near-neutral soil pH (6.3) conditions. Between the two major bedrock lithologic units, Ordovician sediments and Tertiary basalt, a clear enrichment of metals was found in the latter that was reflected in high background levels of elements. Among the various size fractions, silt (average approximately 45.1%) dominated most of the soils. In general and with a few exceptions, the concentrations of measured elements did not show significant correlations to other measured soil parameters, e.g., clay, silt and sand size fractions, organic matter, soil pH, and cation exchange capacity. © 2007 Springer Science+Business Media, Inc.
- Description: C1
- Description: 2003004769
Macroinvertebrate communities in willow (Salix spp.) and reed beds (Phragmites australis) in central Victorian streams in Australia
- Authors: Jayawardana, Chandamali , Westbrooke, Martin , Wilson, Michael , Hurst, Cameron
- Date: 2006
- Type: Text , Journal article
- Relation: Marine and Freshwater Research Vol. 57, no. 4 (2006), p. 429-439
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- Description: Exotic willows (Salix spp.) are widespread riparian tree species of rivers in temperate Australia and New Zealand. Despite being considered as a weed of national significance, little is known about the habitat value of willows and the impact on aquatic biota of vegetation change following willow management programmes. Macroinvertebrate fauna in root habitats of willows and Phragmites australis habitats were examined in three central Victorian rivers to understand the effect of such littoral habitat changes on macroinvertebrates. Data were analysed using Partially Nested Factorial ANOVA with season, river and habitat as main effects. Habitat structure had a significant effect (P < 0.05) on macroinvertebrate community assemblage. However, effect of habitat was not consistent among seasons. The greatest community differences among habitats were observed during winter and least separation during autumn. Taxa responsible for community differences among habitats were also identified. Species richness and abundance did not show consistent variation among habitats over different rivers or seasons. This study provided some indication of the macroinvertebrate community changes that would take place in situations where riparian vegetation changes takes place from willows to P. australis. © CSIRO 2006.
- Description: C1
- Description: 2003001620
Aboriginal spatial organization in far northwest Victoria - A reconstruction
- Authors: Clark, Ian , Ryan, Edward
- Date: 2008
- Type: Text , Journal article
- Relation: South Australian Geographical Journal Vol. 107, no. (2008), p. 15-48
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- Description: This paper is concerned to re-examine Aboriginal spatial organization in the far northwest region of Victoria from Mildura to the Victorian border with South Australia. RMW Dixon (Working Papers) has noted that there is a multiplicity of names of groups in this region, and their status must be resolved. It does this by examining the primary sources and nineteenth century reconstructions such as Thomas, Goodwin, Smyth, Mathews, and Howitt, and then through a more critical analysis of twentieth century reconstructions such as Tindale. It finds that south of the Murray River and west of Mildura there were two language groups: Keramin (which included Jarijari at Mildura) and Yuyu to their west. Keramin at Mildura claimed country on both sides of the Murray River, however the Yuyu were only on the southern side of the river. The northern side of the Murray River belonged to Marawara, the southernmost dialect of Pakantji. The presence of the Marawara south of the Murray River is considered a post-contact adaptation.