Source: J0rgensen (2000b). 1Coffaro et al. (1997).

2Marques et al. (1997); Fonseca et al. (2000).

1969 1990 1991 1992 1993 1994 1995 1996 1997 1998 time (year)

Figure 9.8 Specific eco-exergy mean annual values: present scenario (continuous line), removal of Ulva, optimal strategy from cost-benefit point of view (dotted line), and nutrients load reduction from watershed (dashed line). Reprinted with permission.*

*Copyright © 2005 Handbook of Ecological Indicators for Assessment of Ecosystem Health, edited by S.E. Jorgensen, F-L Xu, R. Costanza, from chapter by J.M. Zaldivar et al. Two figures reproduced by permission of Taylor & Francis, a division of Informa plc.

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