has participant process population of organisms population process A process that has as primary participant a population. Includes processes such as population growth, extinction, evolution, selection, and adaptation. Population processes may depend on the processes of individual organisms {e.g., population growth reflects the cumulative multicellular organism reproduction (GO:0032504) and death (GO:0016265) of all individuals in a population}, but cannot be described for an individual organism. Some of these processes (e.g., evolution, extinction) can also occur at the species level, so PCO distinguishes between, for example, population extinction and species extinction. The GO has the terms 'multi-organism process' (GO:0051704) and 'intraspecies interactions between organisms' (GO:0051703), but these categories are only defined for interactions between two individuals. It is unclear at this point if 'biological process' (GO:0008150) encompasses population processes. metadata incomplete