Phytoplankton Competition for Nutrients and Light in a Stratified Water Column

Phytoplankton compete for nutrients and light in a vertically heterogeneous environment determined by turbulent mixing. We analyzed a model of competition between two phytoplankton species in a stratified water column. We assume that the surface layer is uniformly mixed and that the deep layer is poorly mixed, as is commonly observed in lakes and oceans. We employed two analytical techniques, $I_{\mathrm{out}\,}-R theory in the mixed surface...