uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Toxicity of inorganic aluminium at spring snowmelt-In-stream bioassays with brown trout (Salmo trutta L.)
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics. (Erkenlabratoriet)
2012 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 437, 422-432 p.Article in journal (Refereed) Published
Abstract [en]

Although the acid load has decreased throughout Scandinavia, acidic soils still mobilise aluminium (Al) that is harmful to brown trout. We hypothesise that there are thresholds for Al toxicity and that the toxicity can be traced from the water content to gill accumulation and the consequential physiological effects. During snowmelt, yearlings were exposed to a gradient of pH and inorganic monomeric Al (Al-i) in humic streams to study the toxic effects and mortality. Gill Al and physiological blood analyses [haemoglobin (Hb), plasma chloride (P-Cl) and glucose (Glu)] were measured. As the water quality deteriorated, Al accumulated on the gills; Hb and Glu increased; P-Cl decreased, and mortality occurred. Moribund fish had significantly increased gill Al and Hb, suggesting that respiratory disturbances contributed to mortality. Decreased P-C and plasma availability indicated an ion regulatory disturbance and possibly circulatory collapse. Al-i should be less than 20 mu g/L, and pH higher than 5.0, to sustain healthy brown trout populations. These thresholds can be used to fine-tune lime dose, as both Al-i and pH levels have to be balanced to prevent harm in the recovering aquatic biota. Although Al is tightly linked to pH, local variation in Al availability in soil and bedrock affects the Al release and subsequent toxic Al-i episodes in some catchment areas.

Place, publisher, year, edition, pages
2012. Vol. 437, 422-432 p.
Keyword [en]
Acidification, Brown trout, Thresholds Al-i & pH, Gill accumulation Al, Blood physiology, Liming strategy
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-189913DOI: 10.1016/j.scitotenv.2012.08.006ISI: 000310941000048OAI: oai:DiVA.org:uu-189913DiVA: diva2:582885
Available from: 2013-01-07 Created: 2013-01-04 Last updated: 2013-01-07Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Rydin, Emil
By organisation
Department of Ecology and Genetics
In the same journal
Science of the Total Environment
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 210 hits
ReferencesLink to record
Permanent link

Direct link