Toolkit for Ecosystem Service Site-based Assessment (TESSA)
The Toolkit for Ecosystem Service Site-based Assessment (TESSA) was developed in 2014, through a collaboration of six institutions (BirdLife, Anglia Ruskin University, University of Cambridge, RSPB, Tropical Biology Association and UNEP WCMC), with support from scientists and practitioners from multiple disciplines. The toolkit provides accessible guidance on low-cost methods for how to evaluate the benefits people receive from nature at particular sites in order to generate information that can be used to influence decision making. It includes resources such as; guidance on conducting a preliminary site scoping appraisal, decision trees for selecting appropriate methods, descriptions of over 50 methods for assessing ecosystem services, case studies and guidance on reporting.
TESSA is primarily aimed at conservation practitioners, although the methods may be applicable to a wide range of users, such as natural resource managers or development organisations. The tools are applicable to developing and developed countries, and across terrestrial and wetland habitat (though currently excluding marine areas). The current version (1.2) provides methods for assessing global climate regulation, flood protection, water provision, water quality improvement, harvested wild goods, cultivated goods and nature-based recreation. You can request to download TESSA from the BirdLife website (link below), as well as access user guidance and videos.
Information on BirdLife International website – http://www.birdlife.org/worldwide/science/assessing-ecosystem-services-tessa
Tool download – http://tessa.tools/