Summer 



600 



E 



^400 



o 



"O 



c 

 ro 



CO 

 3 

 O 



200 



Day 



Nutrients 

 Salinity 



0L 



o 



JL 



A 



J 



lu 



u 



7 14 22 7 14 22 7 14 22 

 3 10 17 3 10 17 3 10 17 

 Low Medium High 

 10 ppt 



7 14 22 7 14 22 7 14 22 



3 10 17 3 10 17 3 10 17 



Low Medium High 



20 ppt 



Jl 



ll 



7 14 22 7 14 22 7 14 22 



3 10 17 3 10 17 3 10 17 



Low Medium High 



33 ppt 



Winter 



50 1 



40 



30 



20 



10- 







Week 



Nutrients 



Salinity 



en 



cu 



CD 



mi 



01234 01234 01234 



Low Medium High 

 10 ppt 



Ln 



01234 01234 01234 



Low Medium High 

 20 ppt 



nl I I II II I n 



ji 



01234 01234 01234 



Low Medium High 

 33 ppt 



Figure 4.2. Results of manipulative experiments that varied water salinity and nutrient 

 concentrations (using Milorganite additions) in microcosms at Tijuana Estuary. The phytoplankton 

 response in the summer experiment is shown as increased cell density; the macroalgal response in 

 the winter experiment is shown as increased biomass. Reprinted with permission from Rudnicki 

 (1986) and Fong (1986). 



83 



