Marine Ecology, pp15-61. Ed. by Wulff, F., Field, J.G., and Mann, K.H. Springer Verlag, Berlin. 284pp. 2 Christian, R.R., Baird, D., Luczkovich, J., Johnson, J.J., Scharler, U.M., and Ulanowicz, R.E. 2005 [...] estuarine ecosystem function: energy diversion from consumers to microbes. Ecological Applications, 14: 805-822. Baird, D., and Heymans, J.J. 1996. Assessment of ecosystem changes in response to freshwater [...] graph. SIAM J. Comput. 4:77- 84. 3 Leontief, W. 1951. The Structure of the American Economy, 1919-1939. 2nd edn. Oxford University Press, New York. Levine, S.H. 1980. Several measures of trophic structure