Cristin-prosjekt-ID: 2512651
Sist endret: 28. juni 2021, 15:56

Cristin-prosjekt-ID: 2512651
Sist endret: 28. juni 2021, 15:56
Prosjekt

DiTail Marine Disposal of Mine Tailings: Impacts on Pelagic Ecosystem Components in Norwegian Fjords

prosjektleder

Pål Asgeir Olsvik
ved Fakultet for biovitenskap og akvakultur ved Nord universitet

prosjekteier / koordinerende forskningsansvarlig enhet

  • Nord universitet

Finansiering

  • Norges forskningsråd
    Prosjektkode: 281093

Tidsramme

Avsluttet
Start: 1. januar 2018 Slutt: 30. juni 2021

Beskrivelse Beskrivelse

Tittel

DiTail Marine Disposal of Mine Tailings: Impacts on Pelagic Ecosystem Components in Norwegian Fjords

Vitenskapelig sammendrag

The renewable energy industry has generated an increased demand for metals and minerals, and therefore more mining activity. Norway and a few other countries allow disposal of mine tailings in the marine environment. Placement of mine tailings in the marine environment might negatively affect ecosystems near discharge sites. Mine tailings consist mostly of finely crushed rock material remaining from the milling process but can also contain processing chemicals and metals. Fine-grained tailing particles are easily spread in the water column and represent a source of stress to organisms. Early life stages of animals, including larval stages of fish and copepods, are particularly vulnerable to stress, since their energy requirements for development and growth are high. In the DiTail project we studied how components of mine tailings (particles, metals, and processing chemicals) affect early life stages of marine fish and copepods at the molecular and physiological levels. Data from exposure experiments were used as input in dynamic energy balance models to predict ecosystem effects.

 

Our results show that particles are the main driver for impacts on early life stages of copepods and fish. Tailing particles were taken up and caused developmental delays in early life stages of Calanus finmarchicus. Interestingly, the presence of flocculation chemicals reduced this effect, probably due to a reduction of dispersed particle number. The energy budget model showed that these effects were caused by reduced food assimilation. Exposure to particles affected a broad range of metabolites linked to metabolism in C. finmarchicus, including energy metabolism, amino and free fatty acids, nucleic acids, and cofactors, and pathways that support growth. The strongest effect of particle exposure was seen on oxidative stress pathways. Surprisingly, Cu exposure alone did not induce oxidative stress at the studied concentrations in C. finmarchicus (<30 µg/L). Tailing particles attached to fish eggs, causing a loss of buoyancy and a reduced survival in concentrations that can be expected close to tailing release points. Metabolomics analysis of Atlantic cod eggs and larvae exposed Cu showed that eggs were less responsive than larvae. In contrast to the responses seen in C. finmarchicus, Cu exposure alone increased protein turnover and induced oxidative stress in early life stages of cod. The highest Cu concentration had a profound effect on energy metabolism, and disturbed energetic pathways including glycolysis, fatty acid synthesis and β-oxidation. In conclusion, the DiTail project shed light on the potential negative impact of discharge of mine tailings in the marine environment, and document that fine-grained particles can harm pelagic organisms.

prosjektdeltakere

prosjektleder

Pål Asgeir Olsvik

  • Tilknyttet:
    Prosjektleder
    ved Fakultet for biovitenskap og akvakultur ved Nord universitet

Trond Nordtug

  • Tilknyttet:
    Prosjektdeltaker
    ved Klima og miljø ved SINTEF Ocean

Raymond Nepstad

  • Tilknyttet:
    Prosjektdeltaker
    ved Klima og miljø ved SINTEF Ocean

Linn Hjelmeland Svendheim

  • Tilknyttet:
    Prosjektdeltaker
    ved Fakultet for biovitenskap og akvakultur ved Nord universitet

Tomasz Maciej Ciesielski

  • Tilknyttet:
    Prosjektdeltaker
    ved Institutt for biologi ved Norges teknisk-naturvitenskapelige universitet
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Resultater Resultater

Effects of marine mine tailing exposure on the development, growth, and lipid accumulation in Calanus finmarchicus.

Svendheim, Linn Hjelmeland; Jager, Tjalling; Olsvik, Pål Asgeir; Øverjordet, Ida Beathe; Ciesielski, Tomasz Maciej; Nordtug, Trond; Kristensen, Torstein; Hansen, Bjørn Henrik; Kvæstad, Bjarne; Altin, Dag mfl.. 2021, Chemosphere. OCEAN, NORD, NTNU, NEDERLAND, DIVNORSKVitenskapelig artikkel

Effects of mine tailing exposure on early life stages of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus).

Farkas, Julia; Nordtug, Trond; Svendheim, Linn Hjelmeland; Amico, Elettra; Davies, Emlyn John; Ciesielski, Tomasz Maciej; Jenssen, Bjørn Munro; Kristensen, Torstein; Olsvik, Pål Asgeir; Hansen, Bjørn Henrik. 2021, Environmental Research. OCEAN, NORD, NTNUVitenskapelig artikkel

Hva skjer når maten til fiskeyngelen har magen full av stein?

Farkas, Julia; Øverjordet, Ida Beathe. 2018, OCEANIntervju

An old topic of emerging concern: Impacts of mineral (mining) particles on early life stages of fish.

Farkas, Julia; Nordtug, Trond; Svendheim, Linn Hjelmeland; Amico, Elettra; Davies, Emlyn John; Ciesielski, Tomasz Maciej; Kvæstad, Bjarne; Olsvik, Pål Asgeir; Kristensen, Torstein; Hansen, Bjørn Henrik. 2020, Norwegian Environmental Toxicology Symposium. UIT, OCEAN, NORD, NTNUVitenskapelig foredrag
1 - 5 av 13 | Neste | Siste »