WHEN - World Historical Ecology Network - arranges seminars and workshops on historical ecology. The networks is supported by Riksbankens Jubiuleumsfond.

The network's aim is to fuction as a tool for communication between researchers in different geographical regions and subjects who are involved in historical ecology.

Historical ecology unites methods, theories and perspectives from different sciences with the aim to understand complex historical connections between humans and the environment in different geographical levels and times.