Sammanfattning

An ecosystem-based management of a large sea can give heterogeneous nutrient load targets for different parts of the sea. Cost effective solutions to heterogeneous nutrient reductions targets based on ecological conditions are compared with the same overall nutrient reductions to the Baltic Sea. To this end, a numerical programming model is used, which includes eight different nutrient abatement measures (fertilizer and livestock reduction, cultivation of catch crops, reduced airborne nitrogen emissions, improved cleaning at sewage treatment plants, construction of wetlands and buffer strips, and mussel farming) in 21 catchments of the Baltic Sea. The results indicate that the cost for the international agreement on maximum load targets to different marine basins amounts to 5.3 billion euro. This is more than twice as large as the cost for the same total nutrient load targets to the Baltic Sea without specific targets for the marine basins. However, the resulting nutrient loads to the different marine basins deviate from the basin targets where the loads are lower for some basins but can exceed that for one basin, Baltic Proper, by approximately 22 per cent. Whether or not the ecological costs and benefits from deviations in basin targets under the Baltic Sea targets exceed the excess abatement cost of 2.9 billion euro for achieving the marine basin targets remains to be verified.

Nyckelord

cost-effectiveness; ecosystem-based nutrient load targets; Baltic Sea

Publicerad i

Water
2020, Volym: 12, nummer: 10, artikelnummer: 2679
Utgivare: MDPI

SLU författare

• Gren, Ing-Marie

  • Institutionen för ekonomi, Sveriges lantbruksuniversitet
    

• Tirkaso, Wondmagegn Tafesse

  • Institutionen för ekonomi, Sveriges lantbruksuniversitet
    

Globala målen

Bevara och nyttja haven och de marina resurserna på ett hållbart sätt för en hållbar utveckling


UKÄ forskningsämne

Ekologi


Publikationens identifierare

DOI: https://doi.org/10.3390/w12102679

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/109121