Browsing by Subject "mineraalit"

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  • Mykrä, Heikki; Kuoppala, Minna; Nykänen, Vesa; Tolonen, Katri; Turunen, Jarno; Vilmi, Annika; Karjalainen, Satu Maaria (Elsevier, 2021)
    Journal of Environmental Management 278, Part 2 (2021), 111532
    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.
  • Nordenskiöld, Adolf Erik (Helsingfors, 1855)
  • Kaikkonen, Laura; Helle, Inari; Kostamo, Kirsi; Kuikka, Sakari; Törnroos, Anna; Nygård, Henrik; Venesjärvi, Riikka; Uusitalo, Laura (American Chemical Society, 2021)
    Environmental Science & Technology 55: 13, 8502-8513
    Seabed mining is approaching the commercial mining phase across the world’s oceans. This rapid industrialization of seabed resource use is introducing new pressures to marine environments. The environmental impacts of such pressures should be carefully evaluated prior to permitting new activities, yet observational data is mostly missing. Here, we examine the environmental risks of seabed mining using a causal, probabilistic network approach. Drawing on a series of interviews with a multidisciplinary group of experts, we outline the cause-effect pathways related to seabed mining activities to inform quantitative risk assessments. The approach consists of (1) iterative model building with experts to identify the causal connections between seabed mining activities and the affected ecosystem components, and (2) quantitative probabilistic modelling to provide estimates of mortality of benthic fauna in the Baltic Sea. The model is used to evaluate alternative mining scenarios, offering a quantitative means to highlight the uncertainties around the impacts of mining. We further outline requirements for operationalizing quantitative risk assessments, highlighting the importance of a cross-disciplinary approach to risk identification. The model can be used to support permitting processes by providing a more comprehensive description of the potential environmental impacts of seabed resource use, allowing iterative updating of the model as new information becomes available.
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)
  • Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia (Helsingin yliopisto, kulttuurien tutkimuksen laitos, arkeologia, 2002)