Assessing mining impacts: The influence of background geochemical conditions on diatom and macroinvertebrate communities in subarctic streams

Show full item record



Permalink

http://hdl.handle.net/10138/337070

Citation

Heikki Mykrä, Minna Kuoppala, Vesa Nykänen, Katri Tolonen, Jarno Turunen, Annika Vilmi, Satu Maaria Karjalainen. Assessing mining impacts: The influence of background geochemical conditions on diatom and macroinvertebrate communities in subarctic streams. Journal of Environmental Management 278, Part 2 (2021), 111532, ISSN 0301-4797. https://doi.org/10.1016/j.jenvman.2020.111532

Files in this item

Total number of downloads: Loading...

Files Size Format View Description
Title: Assessing mining impacts: The influence of background geochemical conditions on diatom and macroinvertebrate communities in subarctic streams
Author: Mykrä, Heikki; Kuoppala, Minna; Nykänen, Vesa; Tolonen, Katri; Turunen, Jarno; Vilmi, Annika; Karjalainen, Satu Maaria
Publisher: Elsevier
Date: 2021
Language: en
Belongs to series: Journal of Environmental Management 278, Part 2 (2021), 111532
ISSN: 0301-4797
DOI: https://doi.org/10.1016/j.jenvman.2020.111532
URI: http://hdl.handle.net/10138/337070
Abstract: Mining has changed landscapes locally in northern Fennoscandia and there is an increasing pressure for exploitation of the remaining mineral deposits of the region. Mineral deposits, even if unmined, can strongly influence stream water chemistry, stream biological communities and the ability of organisms to tolerate stressors. Using data sampled from six mining areas with three active (gold and chrome), two closed (gold) and one planned mine (phosphate), we examined how mineral deposits and mining influence water chemistry and diatom and macroinvertebrate communities in subarctic streams in Finnish Lapland. We supplemented the data by additional samples compiled from databases and further assessed how variation in background geological conditions influences bioassessments of the impacts arising from mining. We found that water specific conductivity was elevated in our study streams draining through catchments with a high mineral potential. Mining effects were mainly seen as increased concentration of nitrogen. Influence of mineral deposits was detected in composition of diatom and macroinvertebrate communities, but communities in streams in areas with a high mineral potential were as diverse as those in streams in areas with a low mineral potential. Mining impacts were better detected for diatoms using a reference condition based on sites with a high than low mineral potential, while for macroinvertebrates, the responses were generally less evident, likely because of only minor effects of mining on water chemistry. Community composition and frequencies of occurrence of macroinvertebrate taxa were, however, highly similar between mine-influenced streams and reference streams with a high potential for minerals indicating that the communities are strongly structured by the natural influence of mineral deposits. Incorporating geochemistry into the reference condition would likely improve bioassessments of both taxonomic groups. Replicated monitoring in potentially impacted sites and reference sites would be the most efficient framework for detecting environmental impacts in streams draining through mineral-rich catchments.
Description: Highlights • Mineral deposits influence water chemistry and composition of benthic communities. • Catchments with high potential for minerals and mining have unique stream communities. • Atypical background geology should be integrated in bioassessment of mining.
Subject: bioassessment
biodiversity
community composition
mineral deposits
reference condition
rivers
mining industry
subarctic region
minerals
Finland
Subject (ysa): arviointi
biodiversiteetti
biologiset menetelmät
eliöyhteisöt
joet
kaivostoiminta
koostumus
levät
mineraalit
piilevät
päästöt
selkärangattomat
subarktinen alue
vesikemia
virtavedet
Suomi
Ekologia
Evoluutiobiologia
Geotieteet
Ympäristötiede
Rights: In Copyright 1.0
Full text embargoed until: 2023-01-16


This item appears in the following Collection(s)

Show full item record