The TESSA toolkit is an easy-to-use workbook that leads the user through the steps needed to assess the ecosystem services provided at a particular site.
It includes an introduction to the concepts of ecosystem services and natural capital, guidance on how to conduct a preliminary scoping appraisal to identify important services and beneficiaries, decision trees to identify the best methods to use for each service, and links to a set of simple low-cost methods for measuring ecosystem services either qualitatively or quantitatively.
It also provides worked examples, instructions for collecting site-specific data where appropriate and guidance on how to communicate results to decision-makers.