CO2 skader fiskeriet

Der er for meget CO2 i verdenshavene, som nu er ved at blive for sure. Det skader havets plankton og rejer.

Havene er blevet 30 procent mere sure end før industrialiseringen, og det har konsekvenser. Syre fra CO2-udslip skader plankton med kalkskeletter, som både fisk og hvaler ernærer sig på.

Havene opløste hen ad vejen rigtig meget CO2, men de enorme mængder gennem årene betyder, at de kan ikke længere opløse så meget af den. Forskere beregner, at havvandet fremover kun vil være i stand til at optage en fjerdedel af menneskers udslip.

Dyr som er kalkdannede kommer derfor i fare. Det gælder snegle, rejer, andre krebsdyr og adskillige planktonarter.

Fisk og hvaler kan leve af planktonorganismersom ikke er kalkdannede, men i så fald vil det omvælde havenes økosystemer og sandsynligvis påvirke fiskeriet.

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