Background and Aims: Intraspecific variation in foundation species of forest ecosystems can shape community and ecosystem properties, particularly when that variation has a genetic basis. Traits mediating interactions with other species are predicted by simple allocation models to follow ontogenetic patterns that are rarely studied in trees. The aim of this research was to identify the roles of genotype, ontogeny and genotypic trade-offs shaping growth, defence and reproduction in aspen.Methods: We established a common garden replicating >500 aspen genets in Wisconsin, USA. Trees were measured through the juvenile period into the onset of reproduction, for growth, defence chemistry (phenolic glycosides and condensed tannins), nitrogen, extrafloral nectaries, leaf morphology (specific leaf area), flower production and foliar herbivory and disease. We also assayed the TOZ19 sex marker and heterozygosity at ten microsatellite loci.Key Results: We found high levels of genotypic variation for all traits, and high heritabilities for both the traits and their ontogenetic trajectories. Ontogeny strongly shaped intraspecific variation, and trade-offs among growth, defence and reproduction supported some predictions while contradicting others. Both direct resistance (chemical defence) and indirect defence (extrafloral nectaries) declined during the juvenile stage, prior to the onset of reproduction. Reproduction was higher in trees that were larger, male and had higher individual heterozygosity. Growth was diminished by genotypic allocation to both direct and indirect defence as well as to reproduction, but we found no evidence of trade-offs between defence and reproduction.Conclusions: Key traits affecting the ecological communities of aspen have high levels of genotypic variation and heritability, strong patterns of ontogeny and clear trade-offs among growth, defence and reproduction. The architecture of aspen’s community genetics – its ontogeny, trade-offs and especially its great variability – is shaped by both its broad range and the diverse community of associates, and in turn further fosters that diversity.

The causes and consequences of global change are well-documented, as are mitigation and adaptation strategies. However, human actions continue to fail in building adequate socio-ecological resilience to the accelerating threats of global change. Translational science, which focuses on connecting scientific research to human benefits, is imperative to building resilience to a confluence of global change threats because it brings the implications of theory and empirical research into practice. Translational ecology, an approach to knowledge co-creation that is grounded in equitable, inclusive, empathetic, and just partnerships among administrators, policy makers, scholars, practitioners, and the public, has immense potential to bring about the rapid and expansive social, ecological and political changes necessary to build resilience to global change threats. Here, we articulate a need for greater engagement of ecologists and other professionals in translational initiatives addressing seven major resilience building challenges, and propose a framework that lowers barriers to participation and promotes stronger relationships among stakeholders. We recommend specific actions that ecologists can take based on their situation, as well as evidence and demonstrated need, to foster resilience building through their contributions to communication, policy, education, knowledge creation, leadership, and service as role models. We conclude with an urgent call for expansive engagement of ecologists and other professionals in initiatives that combat misinformation, partner equitably with communities in knowledge creation, cultivate empathy and compassion, bolster public trust in science, and ultimately build decentralized communities of practice that enable rapid and high-impact responses to global change.