demonstration of why I am concerned, this is supposed to cycle through four views: 1) only green “watershed derived units of nutrients” 2) plus ten red/orange “units of nutrients introduced by returning salmon” 3) mixture of twenty (ten each color) units of nutrients 4) remaining ten (mixed color) nutrients after smolts have removed same number of units of nutrients as adults introduced –NOTE that the ratio of red to green is the same as when the adult contribution was first mixed