“…Absolute values of all nutrient traits, except N a , were significantly higher at 14°C than 22°C in both thermal affiliation groups (Supporting Information: Figure S3), while STVs showed significant shifts in P m and P a when species were transplanted away from their thermal means (Figure 5). For cold-affiliated species, higher leaf nutrients coincide with higher photosynthetic capacities at their cooler, home temperatures (Cox et al, 2023); as temperatures rise, faster enzymatic reactions allow carbon assimilation to be maintained with fewer photosynthetic enzymes (Arcus et al, 2016;van de Weg et al, 2012;Wang et al, 2020). N and P are both essential in carbon fixation, with N heavily invested in Rubisco and P modulating RuBP regeneration (Bahar et al, 2017;Bar-On & Milo, 2019;Bloomfield et al, 2014;Dusenge et al, 2021), but lower concentrations of both nutrients are required at lower photosynthetic capacities.…”