The second edition of Forest Adaptation Resources: Climate Change Tools and Approaches for Land Managers, like its predecessor, is intended to provide perspective, information, and tools to land managers considering how to adapt forest ecosystems to a changing climate. Broadly, adaptation includes all adjustments, both planned and spontaneous, in natural and human systems in response to climatic changes and subsequent effects (Parry et al. 2007). In this document, however, we focus on planned, ecosystem-based adaptation activities that use a range of strategies and approaches for sustainable management, conservation, and restoration of forests in order to maintain ecosystem integrity and provide environmental benefits to people.