Sebastian Diehl

Sebastian Diehl is a Professor at Umeå University's Department of Ecology, Environment and Geoscience. His research focuses on mathematical modeling of aquatic ecosystem dynamics, with particular emphasis on consumer-resource interactions and climate change impacts on northern lake ecosystems.

• Current affiliations: Umeå University (Department of Ecology, Environment and Geoscience)
• Previous affiliations: Ludwig-Maximilians-Universität München (Professor of Aquatic Ecology)
• Academic background: Biology undergrad from University of Göttingen, PhD in Animal Ecology from Umeå University (1994)

Research interests center around aquatic ecosystem dynamics in response to environmental change, including:

• Climate change effects on lake ecosystems (temperature and terrestrial nutrient inputs)
• Mathematical modeling of consumer-resource interactions
• Benthic-pelagic coupling in nutrient and energy flows
• Phytoplankton-zooplankton dynamics under environmental stressors
• Trophic interactions in stream and lake systems
• Stoichiometric constraints on ecosystem function

His recent publications (2025-2020) demonstrate an integrated approach combining mathematical modeling with experimental validation through field studies and lab experiments, focusing particularly on:

• Climate-induced regime shifts in lake ecosystems
• Stoichiometric mismatch in warming systems
• Functional response modeling
• Vertical niche partitioning in plankton
• Resource acquisition trade-offs
• Browning impacts on primary producers

Administrative roles include:

• Final examiner for PhD education
• Chair of Umeå Marine Science Centre advisory council
• Steering group member of Integrated Science Lab (IceLab)