Optimizing Wetland Functions to Local Conditions in Connection

to Quarries

By Emma Svahn, Marcus Hall, and Sandra Nilsson 2016

We are going to present:

• Introduction and why we did this

• Methods and results

• Our suggestion for multifunctional wetland

Introduction • Today

- Increasing population- decrease in available habitats - Water scarcity (Öland) - Nitrogen based explosives

• Wetlands have decreased, red listed species and biodiversity

Solution - Wetland!

Questions How can Cementa

2) provide habitats for threatened species, and 3) increase the biodiversity through rehabilitation of ecosystem functions.

1) improve the quality of the water pumped from the quarry to the watershed (and eventually the Baltic Sea)

Dam Wetland

Study site

What we did • Nutrient concentrations • Water chemistry • Bioassay- Growth limiting nutrient • Biodiversity inventory

Results

• Turbid water (Particles)

• High nitrogen input and low nitrogen retention

• Low phosphorous concentrations

• Low biodiversity

Suggested layout Depth profile

Suggested layout Zonation

Conclusion

• Constructing a multifunctional wetland will - Increase nutrient removal - Increase biodiversity in connection to the quarry - Increase biodiversity on a landscape level

Thank you for listening!

…and thanks to HeidelbergCement Group Staffan Johnson, Cementa Degerhamn Börje Ekstam Karin Holmfeldt Sara Gunnarsson Elin Lindehoff Lina Mattsson Mireia Bertos-Fortis Terese Uddh Söderberg

Contact: Emma Svahn, es223ed@student.lnu.se Marcus Hall, mh223ik@student.lnu.se Sandra Nilsson, sn222kq@student.lnu.se