SU
MI
HU
ER
ON
Biovolume (106 mm3/ml)
0.0
1.0
2.0
3.0
4.0
SU
MI
HU
ER
ON
0.0
1.0
2.0
3.0
4.0
Biovolume (106 mm3/ml)
2*106 mm3/ml
1*106 mm3/ml
0.5*106 mm3/ml
Phytoplankton Biomass in Lake Huron, 1999
Spring
Summer
High degree of uniformity over lake.  Biomass levels lower than lower lakes, intermediate between Superior and Michigan.  Not huge difference between spring and summer.