| River Estuary Biological Processes: hierarchical model of the biological processes for the Columbia River Estuary (after Simenstad et al. 1984b). |
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| River Estuary Trophic Groups: simplified representation of major linkages between Columbia River Estuary trophic groups (from Weitkamp 1994) |
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| Lagoon Estuary: model structure for nitrogen cycling (after Webster & Harris 2004). DIN = dissolved inorganic nitrogen; DON = dissolved organic nitrogen. |
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