SU
MI
HU
ER
ON
Percent Abundance
0
25
50
75
100
SU
MI
HU
ER
ON
Percent Abundance
0
25
50
75
100
Zooplankton Abundance and
Community Composition, Lake Huron 1998
20,000/m3
10,000/m3
1,000/m3
Bosmina
Daphnia
Other Cladocerans
Calanoida
Cyclopoida
Imm Calanoida
Imm Cyclopoida
Spring
Summer
Community in spring dominated by calanoid copepods
In summer, community biomass larger, dominated by Cladocerans (one species - D galeata mendotae), and both calanoid and cyclopoid copepods
Community extremely similar to Lake Michigan (in spite of differences in phytoplankton)
No large gradients in community composition - perhaps slight increase in biomass in the south?