Thermal tolerance and sociality explain the interactive role of bees in a pollination network

Numerous studies have explored the organization of pollination networks and the factors influencing these interactions at various spatial and temporal scales. Within these networks, species vary in their significance and influence on one another (i.e. their interactive roles), and understanding which factors determine this significance enables us to better comprehend the interconnected relationships that drive the resilience and diversity of ecosystems. Nevertheless, despite the ectothermic nature of bees and the potential impact of social behaviour on bee foraging patterns on plants, the amount of theoretical and empirical information available regarding how bee thermal tolerance limits and sociality affect their interactive roles within pollination networks remains relatively scarce. In this study, we assess how sociality and physiological (thermal tolerance) traits shape the interactive role of bees within a pollination network in a coastal environment of the Gulf of Mexico, Mexico. For sociality, we classified bees as eusocial, subsocial, and solitary while for the limits of thermal tolerance, we used both warmest (i.e. critical thermal maximum, CT max ) and coldest (i.e. critical thermal minimum, CT m in ) temperature. In general, we found that bees' sociality and thermal tolerance limits explain the interactive role of bees within the pollination network studied. Specifically, eusocial bees had a greater interactive role than subsocial and solitary bees. Moreover, we observed that bees with lower CT m ax and higher CT m in (i.e. less heat and cold tolerant) had greater interactive role. Our findings suggest that traits inherent to the life history of bees are valuable for predicting the interactive roles of bees within pollination networks and may have implications for various ecological, functional and evolutionary processes within ecosystems, including potential impacts resulting from climate change.