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The right tree in the right place for a clear reason is a nice slogan, but requires data that are not easily available. Functional diversity refers to the value, range, and relative abundance of functional characteristics (traits, in an ecological sense) in a given ecosystem. Functional diversity approaches are considered a powerful tool to quantify plant responses to environmental gradients and plant mediated effects of ecosystem processes. For instance they can improve our understanding of the relationship between tree diversity and ecosystem functioning. This is a research field that develops fast and global datasets of traits are available, particularly for natural ecosystems. In human intervened ecosystems such information is more limited but farmers/land managers are well aware of plant functions that include the use of products as well as provision of ecosystem services. Here we will present a list of attributes related to key ecosystems services, as identified from scientific knowledge and farmer perspectives, as well as databases available. Finally some brief examples of how these attributes can be used to assess ecosystem services will be presented.