This collection features five peer-reviewed reviews on ecosystem services delivered by forests. The first chapter summarises the current state of knowledge on the interactions between forest ecosystems and the climate system and the way in which forests influence the water cycle. The second chapter reviews the wealth of research on the range of species, functional groups and ecological processes which can develop as a result of the biodiversity in tropical forests. The chapter also considers the main threats to tropical forest biodiversity. The third chapter examines the importance of forest carbon content and the methods currently used to monitor it. The chapter also explores the mechanisms driving forest carbon storage and offers a considered discussion on whether forests should be considered sources or sinks of carbon. The fourth chapter highlights how sustainable forest management (SFM) can be used to maintain or enhance biodiversity in temperate and boreal forests. The chapter utilises two case studies to demonstrate successful implementation of SFM in Ireland and Canada. The final chapter considers the benefits of introducing agroforestry into agroecosystems, focussing on its influence on soil health. The chapter discusses the benefits of agroforestry systems on key soil physical, chemical and biological properties.