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Personal profile

Research profile

I'm a freshwater and marine ecologist by training with 15plus years of experience in river ecology, freshwater restoration, decision support theory, and collaborative, spatial management planning. In my research I combine these topics to – often in multi-disciplinary teams and with local government representatives and communities – investigate alternative ways of solving complex environmental decision problems with a focus on the concurrent protection of freshwater biodiversity and sustainable use of ecosystem services.

My research targets fundamental and applied questions inspired by my three-year hiatus from academia at the Swiss Environmental Agency as well as by my extensive international research, teaching and leadership experience in Switzerland, Italy, Germany, Australia, New Zealand and Spain.

Research website: https://sdlanghans.weebly.com/

Expertise related to UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):

  • SDG 3 - Good Health and Well-being
  • SDG 5 - Gender Equality
  • SDG 6 - Clean Water and Sanitation
  • SDG 13 - Climate Action
  • SDG 14 - Life Below Water
  • SDG 15 - Life on Land

Education/Academic qualification

PhD in freshwater ecology, Dr. sc. ETH Zürich

1 Nov 200231 Dec 2006

Award Date: 24 May 2007

Master of Advanced Studies in Secondary and Higher Education, Didactic diploma

1 Oct 200030 Sep 2002

Award Date: 18 Dec 2002

Studies in systematic biology and zoology, Dipl. Natw. ETH, Swiss Federal Institute of Technology Zurich

1 Oct 199630 Sep 2000

Award Date: 15 Nov 2000


  • Environment
  • Freshwater ecology
  • Ecosystem-based management
  • River restoration
  • Systematic conservation planning
  • Benthic macroinvertebrates
  • Organic matter decomposition
  • Freshwater biodiversity conservation
  • Multi-criteria value and utility theory
  • Multi-criteria decision analysis
  • Stakeholder engagement
  • Spatial mathematical optimisation
  • EU Water Framework Directive


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