Simulating climate change in a tropical rainforest understorey using active air warming and CO addition.

Future climate-change effects on plant growth are most effectively studied using microclimate-manipulation experiments, the design of which has seen much advance in recent years. For tropical forests, however, such experiments are particularly hard to install and have hence not been widely used. We present a system of active heating and CO fertilization for use in tropical forest understoreys, where passive heating is not possible.