Integrating local and ecological knowledge to assess the benefits of trees for ecosystem services: A holistic process-based methodology

Urban Farm DB summary

A study in intensive farming systems of Central Portugal developed a methodology integrating species, trait and crop data, pest predation indicators and local farmers' expertise to estimate pest consumption by birds. Using point count data and each species' energy requirements and life-cycle characteristics, it estimated birds' daily invertebrate consumption and examined the relationship between birds and service provision along a tree gradient. Relating habitat requirements to pest control services via species guilds, the study found higher predation in annual crops close to trees or woody vegetation than in crop-only plots. After analyzing the methodology's main challenges and strengths, the study concludes that farmers' participation improved the accuracy and results of the analysis and that the methodology's holistic character can guide stakeholders and policymaking more effectively.