ERI Reports

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ERI Reports are prepared by researchers affiliated with ERI to disseminate findings from externally funded research. ERI Reports are peer-reviewed and published on the University of Waikato Research Commons, making them credible, citable, and available as a public resource. They also serve to illustrate the diversity of research within ERI and the capabilities of ERI researchers.

Recent Submissions

Now showing 1 - 5 of 90
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    Alum dosing at Waitangi Soda Springs – bioavailability of aluminium in 2016
    (Report, 2017) Ling, Nicholas
    Continuous alum dosing of the Waitangi Soda Springs at Lake Rotoehu commenced in 2010 to reduce inflows of dissolved reactive phosphorus to Lake Rotoehu. Analyses of bioaccumulation in the tissues of kōura and goldfish from Lake Rotoehu were undertaken on animals collected in November 2016 for comparison with data from previous years and control locations to determine the bioavailability and bioaccumulation of aluminium to satisfy annual resource consent conditions 11.7 and 11.8 of resource consent 65966. Lake Rotoehu goldfish showed slightly elevated aluminium concentrations in the gills indicating enhanced exposure to aluminium as a result of alum discharge from the Waitangi Soda Springs but no evidence of significant bioaccumulation in internal tissues.
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    Utuhina Stream monitoring 2015: Effects of continuous alum dosing on fish and aquatic invertebrates
    (Report, Environmental Research Institute, The University of Waikato, 2016) Ling, Nicholas
    This report presents the results of an ongoing assessment of the fish and aquatic macroinvertebrate communities of the Utuhina Stream from 2006 to 2015, and an assessment of the bioavailability of aluminium in fish and koura to satisfy annual resource consent conditions 9.6, 9.8 and 9.7, respectively, for the discharge of alum.
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    Utuhina Stream monitoring 2016: In-stream alum dosing effects on fish and aquatic invertebrates
    (Report, Environmental Research Institute, The University of Waikato, 2017) Ling, Nicholas
    This report presents the results of an ongoing assessment of the fish and aquatic macroinvertebrate communities of the Utuhina Stream from 2006 to 2016, and an assessment of the bioavailability of aluminium in fish and koura to satisfy Bay of Plenty Regional Council’s annual resource consent conditions 9.6, 9.8 and 9.7, respectively, for consent 65321 for the discharge of alum to the Utuhina Stream.
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    Puarenga Stream alum dosing – effects on Lake Rotorua/Sulphur Bay biota 2016
    (Report, Environmental Research Institute, The University of Waikato, 2017) Ling, Nicholas
    Continuous alum dosing of the Puarenga Stream commenced in early 2010 to reduce inflows of dissolved reactive phosphorus to Lake Rotorua. Analyses of bioaccumulation in the tissues of macrobiota were undertaken in February 2016 for comparison to comparable samples obtained prior to and since the commencement of alum dosing to satisfy annual resource consent conditions 8.7 and 8.8 of resource consent 65559. No significant effects of alum dosing could be distinguished. Bioavailable aluminium in the vicinity of Sulphur Bay appears to be primarily influenced by the major geothermal activity of this region. Lake water chemistry in the vicinity of Sulphur Bay is heavily influenced by the direction of geothermal flows emanating from the Bay. No significant differences in aluminium bioaccumulation were observed in any species compared to samples obtained prior to the commencement of alum dosing. Continuous alum dosing of the Puarenga Stream since 2010 apparently does not result in adverse effects to Lake Rotorua shoreline biota nor cause any apparent increase in aluminium bioaccumulation in lake biota in the vicinity of Sulphur Bay.
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    Fish removal from New Zealand Steel Ltd’s water intake pond at North Head sand mine
    (Report, Environmental Research Institute, University of Waikato, 2016) Hicks, Brendan J.; Sjardin, C; Tempero, Grant Wayne; Powrie, Warrick
    Tonkin & Taylor contracted the University of Waikato remove fish by boat electrofishing, and to estimate fish abundance, in the water intake pond of Waikato North Head Mining Ltd’s sand mining site at North Head Mine, Ghezzie Road, Otaua, on the true right bank of the lower Waikato River. This removal was necessitated by failure of a screen intended to exclude fish and its repair.