<p>Ecosystem dynamics are driven by the interactions of the species within. Trophic interactions are structured by organisms’ acquisition and conversion of resources into biomass. This shapes species abundance and richness through variation in resource availability, competition, and trophic cascades. Despite the connections between trophic webs and biodiversity, data within and between these fields remain taxonomically siloed. We compile and organize data from ecological energetics, species-traits, nutrient allocation, and biodiversity research into unified, navigable datasets that bridge these research domains. These datasets focus primarily on temperate forest systems, although data from other ecosystems are additionally included. They include species-level variables relating to tree biomass and nutrient (nitrogen and phosphorus) allocation, alongside species-level consumption (attack rate), assimilation (assimilation efficiency and nitrogen assimilation efficiency), and body mass and nutrient content data for birds, invertebrates, and mammals across multiple trophic groups. Combined with group-level abundance-richness relationships, these data enable biomass- and nutrient-based trophic web development and estimation of species abundance and richness.</p>