Dormancy is a bet-hedging strategy used by a wide range of taxa, including microorganisms. It refers to an ability to enter a reversible state of low metabolic activity when faced with unfavorable environmental conditions, including energy limitation. Dormant microorganisms generate a seed bank, which comprises individuals that are capable of being resuscitated following environmental change. Thus, microbial dormancy may help maintain biodiversity and influence the stability of ecosystem processes.

After introducing a theoretical framework for microbial seed banks, Dr Lennon will present results from a meta-analysis on the prevalence of dormancy in a variety of ecosystems, including oceans, lakes, soils, and the human gut. In addition, he will discuss results demonstrating the importance of dormancy for the maintenance of microbial diversity and ecosystem functioning. Finally, Dr Lennon will present ongoing research which focuses on the mechanisms of bacterial resuscitation, and the implications of these processes under global climate change scenarios.