Table Bc09: Relative Abundance of Taxonomic Classes of Benthos Collected in the Headwater Diversion Basin

Table Bc09: Relative Abundance of Taxonomic Classes of Benthos Collected in the Headwater Diversion Basin

(From MDC Natural Heritage data base)
  Castor River RM 6 & RM 41 Whitewater R. RM 36
Class No. Taxa No./10 ft2 % Comp No. Taxa No./10 ft2 % Comp
Annelida 2 109 17.6 1 22 1.3
Amphipoda       1 1 </1
Isopoda       1 4 0.2
Decapoda 1 3 0.5 1 <1 <.1
Ephemeroptera 23 176 28.3 17 360 21.4
Odonata 6 5 0.8 4 2 0.1
Plecoptera 8 16 2.6 11 121 7.2
Hemiptera 1 1 0.2 1 1 <.1
Megaloptera       2 8 0.5
Trichoptera 14 23 3.7 16 434 25.9
Lepidoptera 1 1 0.1      
Coleoptera 12 54 8.6 9 55 3.3
Diptera 9 207 33.3 12 664 39.6
Gastropoda 4 5 0.8 2 1 0.1
Plecypoda 1 22 3.5 1 1 0.1
Miscellaneous 1 1 0.1 4 3 0.2
Totals 83 623   83 1,677  
No. of samples   7     4  
No. of organisms   4,342     6,703  
  Crooked Ck. RM 22 Basin Totals
Class No. Taxa No./10 ft2 % Comp No. Taxa Ave#/10 ft2 % Comp
Annelida 2 4 0.5 3 58 6.2
Amphipoda 2 1 0.1 2 <1 <.1
Isopoda       1 1 0.2
Decapoda 1 2 0.2 1 2 0.1
Ephemeroptera 19 480 61.7 27 306 32.4
Odonata 3 2 0.3 7 3 0.3
Plecoptera 10 25 3.2 21 46 4.9
Hemiptera       1 1 <.1
Megaloptera 2 3 0.3 3 3 0.2
Trichoptera 11 81 10.4 19 148 15.7
Lepidoptera 1 <1 <.1 1 <1 <.1
Coleoptera 7 16 2.1 14 44 4.7
Diptera 9 162 20.8 13 317 33.6
Gastropoda 1 1 0.2 4 3 0.3
Plecypoda       2 10 1.1
Miscellaneous 2 2 0.2 4 1 0.3
Totals 70 779   123 943  
No. of samples   4     15  
No. of organisms   3,112     14,157  

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