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Starting WiSe 2018/2019

LocationTopic, SpeakerInvited by
2018-10-25 16:00
  W15 0-023

2018-11-01 16:00
  W15 0-023
"Facilitation and feedbacks in seagrass communities: testing the role and context dependency of ecosystem engineers"
Lukas Meysick (Åbo Akademi University Turku, Finland) Functional Marine Biodiversity

Ecosystem engineering species have a profound influence on surrounding communities by modifying and creating the habitat. Eelgrass, Zostera marina, constitutes one of the main habitat providers in otherwise minor structured marine soft sediments in the northern hemisphere. By decreasing hydrodynamic forces and providing shelter from predators, Zostera meadows can host a diverse community, including multiple bivalve species. Studies assume that in return, bivalves can facilitate the occurrence of Zostera by stabilising the sediment, increasing light penetration and increasing nutrient availability through deposition. Yet such interspecific interactions between engineering species are complex and assumed context dependent. This challenges to predict the outcome of changing conditions, for example caused by a loss of key ecosystem functions. We conducted several field and controlled aquarium as well as wave and current flume experiments to explore the conditionality of eelgrass-bivalve interactions. First results indicate both positive and negative interactions between the two ecosystem engineers. Thereby underlying hydrodynamic conditions can have a profound effect on the outcome and strength of these mutual interactions. We believe that further insights in the relationship between benthic plants and bivalves can have great relevance also for ongoing seagrass and soft bottom restoration and management efforts but also contribute to detect possible threats to current biogenic benthic habitats.

Jan Freund
2018-11-08 16:00
  W15 0-023
TBA (or 15.11)
Usman Mirza (Wageningen University and Research Centre, Netherlands) Complex systems
Ulrike Feudel
2018-11-15 16:00
  W15 0-023
TBA (or 08.11)
Usman Mirza (Wageningen University and Research Centre, Netherlands) Complex systems
Ulrike Feudel
2018-11-22 16:00
  W15 0-023

2018-11-29 16:00
  W15 0-023

2018-12-06 16:00
  W15 0-023

2018-12-13 16:00
  W15 0-023

2018-12-20 16:00
  W15 0-023
TBA
Martin Rasmussen (Imperial College London, UK) Qualitative Theory of Nonautonomous and Random Dynamical Systems
Ulrike Feudel
2019-01-10 16:00
  W15 0-023

2019-01-17 16:00
  W15 0-023

2019-01-24 16:00
  W15 0-023

2019-01-31 16:00
  W15 0-023

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