Cited by 14Mercury impact and mitigation studiesFire effects on ecosystemsIsotope Analysis in Ecology

The effects of wildfire on mercury and stable isotopes (δ15N, δ13C) in water and biota of small boreal, acidic lakes in southern Norway

Moreno, Clara E., Fjeld, Eirik, Lydersen, Espen·2016·Environmental Monitoring and Assessment

Abstract

Effects of wildfire on main water chemistry and mercury (Hg) in water and biota were studied during the first 4 post-fire years. After severe water chemical conditions during hydrological events a few months following the wildfire, the major water chemical parameters were close to pre-fire conditions 4 years after the fire. Concentrations of total Hg and methyl Hg in the surface water 4 years after the fire ranged between 1.17-2.63 ng L(-1) and 0.053-0.188 ng L(-1), respectively. Both variables were positive and strongly correlated with total organic carbon (TOC), TOC-related variables (color, UV absorbance), total phosphorous, and total iron. In addition, MeHg was positively correlated with total nitrogen and chlorophyll-a. The concurrence of increased concentrations of nutrients and chlorophyll-a in the lakes, the more enriched δ(15)N-signatures and higher Hg levels in fish 2 years after the fire, might be a result of the wildfire. However, natural factors as year-to-year variations in thermocline depth and suboxic status in the lakes make it difficult to draw any strong conclusions about wildfire effects on Hg in the biota from our investigated lakes.

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Crossref · 10.1007/s10661-016-5148-z

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  • Mercury increased in rainbow trout, brown trout and European perch in Canadian and Norwegian lakes impacted by wildfires.

    “For example, mercury increased in rainbow trout (Oncorhynchus mykiss), brown trout (Salmo trutta) and European perch (Perca fluviatilis) in Canadian and Norwegian lakes impacted by wildfires (Kelly et al., 2006; Moreno et al., 2016).”
  • Factors affecting mercury increases in fish after wildfires included higher water concentrations of mercury and methylmercury, as well as a restructuring of the food web and lengthening of trophic pathways, leading to greater potential for bioaccumulation.

    “Factors affecting this increase included both higher water concentrations of mercury and methylmercury following wildfires, as well as a restructuring of the food web and lengthening of trophic pathways, leading to greater potential for bioaccumulation.”

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Authors
Moreno, C. E., Fjeld, E., & Lydersen, E.
Affiliations
  • University of South-Eastern Norway (NO)
  • Norwegian Institute for Water Research (NO)
Corresponding author
  • Moreno, Clara E.
  • Fjeld, Eirik
  • Lydersen, Espen
Venue
Environmental Monitoring and Assessment
Published
2016-02-20
Volume
188
Issue
3
Pages
178-178
ISSN
  • 0167-6369 (ISSN-L)
  • 1573-2959
OpenAlex
W2286986678
Cited by
14
References
115
Citations by year
2026: 3 · 2025: 1 · 2024: 1 · 2022: 2 · 2021: 1 · 2020: 2 · 2019: 2 · 2018: 1 · 2016: 1
FWCI
0.73
Type
journal article
Language
en
Open access
closed
Locations
  • Environmental Monitoring and Assessment (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Norwegian Research Council
  • Telemark University College
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Mercury impact and mitigation studies
  • Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
  • Physical Sciences › Environmental Science › Ecology › Isotope Analysis in Ecology
Keywords
wildfire effects, mercury, methylmercury, stable isotopes, nitrogen-15, carbon-13, boreal lakes, acidic lakes, lake water chemistry, mercury in fish, total organic carbon, nutrients, chlorophyll a, post-fire recovery, southern Norway
MeSH terms
Animals, Environmental Monitoring, Fires, Fishes, Mercury, Nitrogen, Nitrogen Isotopes, Norway, Water Pollutants, Chemical, Biota, Lakes

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