for the subsidized marsh and the unsubsidized marsh were the same in both marshes. Lake water pumped into the subsidized marsh largely increased the emergy of total nitrogen and total phosphorus compared to that entering the unsubsidized marsh. This implies that the emergy flux of free nonrenewable energy sources influencing self-organization contributed 26% of the total emergy flow to the subsidized marsh. Liquid fuel used to operate the hydraulic pumps and the physical structure of the pump system itself are the two nonrenewable purchased energy sources that were included in the subsidized marsh system and that contributed 68% of its total emergy flow.

Table 9.9 Summary of emergy evaluation

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