Biomass production (i.e. growth) is the net gain of energy and materials over time. There is great diversity in such relationships at most biological scales (cells to ecosystems). We strive to identify central tendencies in such functions, and discover sources of variation as we work toward a predictive understanding of biomass production. We do not focus on unitary or pairs of elements. We study most of the 20-odd biogenic elements encompassing any unit (e.g., cell, lake) as a complex system. We approach this problem with minimal taxonomic and disciplinary boundaries, although we are passionate about freshwaters.