STAP prepared this note summarizing definitions and guidelines on ecosystem-based management to support consistent understanding and implementation of the term. The note responds to a recommendation to STAP by the Independent Evaluation Office of the GEF to provide this summary. At the start, the note summarizes definitions of ecosystem-based approaches and presents brief descriptions of guidelines that could be consulted when designing GEF projects on ecosystem-based management. The note then offers examples of additional STAP guidance that could be used to support the design and implementation of ecosystem-based approaches.