A systematic review of the effectiveness of liming to mitigate impacts of river acidification on fish and macro-invertebrates

Mant, R.C. and Jones, D.L. and Reynolds, B. and Ormerod, S.J. and Pullin, A.S. (2013) A systematic review of the effectiveness of liming to mitigate impacts of river acidification on fish and macro-invertebrates. Environmental Pollution, 179. pp. 285-293. DOI: 10.1016/j.envpol.2013.04.019

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The addition of calcium carbonate to catchments or watercourses � liming � has been used widely to mitigate freshwater acidification but the abatement of acidifying emissions has led to questions about its effectiveness and necessity. We conducted a systematic review and meta-analysis of the impact of liming streams and rivers on two key groups of river organisms: fish and invertebrates. On average, liming increased the abundance and richness of acid-sensitive invertebrates and increased overall fish abundance, but benefits were variable and not guaranteed in all rivers. Where B-A-C-I designs (before-after-control-impact) were used to reduce bias, there was evidence that liming decreased overall invertebrate abundance. This systematic review indicates that liming has the potential to mitigate the symptoms of acidification in some instances, but effects are mixed. Future studies should use robust designs to isolate recovery due to liming from decreasing acid deposition, and assess factors affecting liming outcomes.

Item Type: Article
Subjects: Research Publications
Departments: College of Natural Sciences > School of Environment, Natural Resources and Geography
Date Deposited: 09 Dec 2014 16:41
Last Modified: 23 Sep 2015 03:06
ISSN: 0269-7491
URI: http://e.bangor.ac.uk/id/eprint/758
Identification Number: DOI: 10.1016/j.envpol.2013.04.019
Publisher: Elsevier
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