Find out about the circle of life in the microhabitat of an oak tree. Explore Ecosystems: Tree dives into the diverse wonder of the life that an oak tree supports (and is supported by). This habitat is home to birds, beetles, squirrels, spiders and more. Readers find out how this ecosystem works through the lives of these animals. It explores how tree life relies not only on other living things, but on non-living things, such as the soil, climate and wind. The importance of balance in the natural world is a key theme - showing how animals large and tiny have an impact on their environment. The Explore Ecosystems series is a perfect introduction to habitats for readers aged 7 and up. Titles in the series In a Desert In an Ocean In a Pond In a Rainforest On a Savannah In a Tree.