Terrestrial and riparian environments are intricately linked through the exchange of resources; however, these subsidies are most often measured in terms of biomass quantity, with comparatively less attention given to nutritional quality. The quality of these trophic linkages is expected to vary depending on the community composition of the organisms. In this study, we examined whether the presence of freshwater mussel beds influences the nutritional quality of aquatic insect subsidies, and whether such variation is reflected in the condition and physiological metrics of riparian predators. We sampled web-building riparian spiders (family Tetragnathidae) and emergent insects from sites featuring and lacking mussel beds, as well as three different creeks within Kisatchie National Forest, Louisiana. To characterize subsidy quality and predator responses, we conducted fatty acid analyses on both insects and spiders, measured spider body condition, and assessed immune function. In parallel, we quantified the emergent insect community composition, biomass, and fatty acid content to characterize nutrient availability and quality. Together, these data will be used to evaluate links between aquatic community structure, subsidy quality, and terrestrial predator health. This work aims to advance understanding of how benthic community composition may influence the nutritional pathways connecting aquatic and riparian food webs. Preliminary analyses indicate no detectable differences in spider body condition between mussel and non-mussel sites.