BiSSL alumn Colton Brehm (MS graduate May 2020) just had his full-length research paper accepted in the Journal of Industrial Ecology! The paper, titled “Nestedness in eco-industrial networks: exploring linkage distribution to promote sustainable industrial growth,” investigates the use of nestedness – a structural characteristic of ecological food webs, to guide the design of Eco-Industrial Networks (EINs) to improve their sustainability, creating a more circular economy.
Abstract: “Eco-Industrial Networks (EINs) have gained support as a solution that simultaneously reduces environmental burdens and promotes economic interests. EINs operate under a mutualistic framework, where waste materials and energy are exchanged between industries to their mutual benefit, creating a diverse web of flows. Recent studies have focused on analogies between food webs (FWs) and EINs, measuring a network’s success at ecological imitation as representative of its sustainability. Studies have focused heavily on the number of links and nodes in a network, but have neglected the economic reality that each investment comes at the opportunity cost of all alternatives. This analysis focuses on the nestedness metric as used by ecologists to address this pivotal facet to the FW-EIN analogy. Nestedness describes an ecological strategy for the position of links between nodes in a network in a way that maximizes network cycling for a given number of connections. This metric presents many advantages for EIN design and analysis, including maturity independence, size normalization, and a strong statistical record in highly mutualistic ecological systems. Application of nestedness to EINs indicates a lower presence of nested structures and more randomness than what is typically seen in FWs. The industrial networks also display a correlation between high nestedness and internal cycles, suggesting that the reuse of materials and energy in EINs can be improved upon by increasing the nestedness of structures.”Brehm, C., & Layton, A. (2020). “Nestedness in eco-industrial networks: exploring linkage distribution to promote sustainable industrial growth.” Journal of Industrial Ecology. DOI: 10.1111/jiec.13057