Havens, K. E., A. C. Tyler, J. Hauxwell, S. Thomas, K. J. McGlathery , I. Valiela, J. Cebrian, A. D. Steinman, and S. J. Hwang. in press. Complex interactions between primary producers in shallow marine and freshwater ecosystems: Implications for community responses to nutrient stress. In . Environmental Pollution. Keywords=nitrogen, macroalgae, lagoon, microalgae, phytoplankton, metabolism, autotrophic, heterotrophic End_keywords Notes= submitted by kjm4k@virginia.edu, Thu Apr 12 17:17:47 EDT 2001 End_notes