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Göteborgs universitets publikationer

An almost completed pollution-recovery cycle reflected by sediment geochemistry and benthic foraminiferal assemblages in a Swedish–Norwegian Skagerrak fjord

Författare och institution:
Irina Polovodova Asteman (Institutionen för geovetenskaper); Daniela Hanslik (Institutionen för geovetenskaper); Kjell Nordberg (Institutionen för geovetenskaper)
Publicerad i:
Marine Pollution Bulletin, 95 ( 1 ) s. 126-140
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
During the 20th century Idefjord was considered one of the most polluted marine areas in Scandinavia. For decades it received high discharges from paper/pulp industry, which made it anoxic and extremely polluted by heavy metals and organic contaminants. Today the fjord is close to fulfil a complete pollution-recovery cycle, which is recorded in its sediment archives. Here we report results from five sediment cores studied for TC, C/N, heavy metals and benthic foraminifera. All of the cores have laminations deposited during 1940–1980s and indicative of long-lasting anoxia; high TC and heavy metal content, poor foraminiferal faunas and lack of macrofauna. The upper part of the cores deposited since 1980s shows a gradual pollutant decrease and partial foraminiferal recovery. The majority of foraminiferal species in Idefjord are agglutinated opportunistic and stress-tolerant taxa, which to some extent tolerate hypoxia and are early colonisers of previously disturbed environments. The current study demonstrates a value of benthic foraminiferal stratigraphy as a useful tool in understanding processes driving environmental degradation and recovery of coastal ecosystems.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Geovetenskap och miljövetenskap
Biologiska vetenskaper
Heavy metals Organic pollution Pulp and paper industry Environmental micropaleontology Bottom-water anoxia Ecological indicators
Postens nummer:
Posten skapad:
2015-06-16 16:38
Posten ändrad:
2015-06-18 13:37

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