Aquatic Macroinvertebrate Summary Data 



9/19/00 



Site NameiShields River 



Site ID: Johnstone station 



TOTAL ABUNDANCE 

 Ephemeroptera + Plecoptera + 

 Trichoptera (EPT) abundance 



TOTAL NUMBER OF TAXA 

 Number EPT laxa 



TAXONOMIC GROUP COMPOSITION 



328 



132 



20 

 8 



GROUP 



Misc. Taxa 



Odonata 



Ephemeroptera 



Plecoptera 



Hemiptera 



Megaloptera 



Trichoptera 



Lepidoptera 



Coleoptera 



Diptera 



Chrionomidae 



#TAXA ABUNDAN PERCENT 



CONTRIBUTION OF DOMINANT TAXA 



TAXON ABUNDANCE 



Hydropsyche sp 



Orthocladius sp 



Optioservus sp. 



Physidae 



Lepidostoma sp.-sand case larv. 



SUBTOTAL 5 DOMINANTS 



Amiocentrus aspilus 



Chcolopus sp. 



Zaitzevia sp. 



Eukiefferiella Pseudomontana C 



Acan 



TOTAL DOMINANTS 



SAPROBIC INDICES 

 Hilsenhoff Biotic Index 



4.89 



RATIOS OF TAX GROUP ABUNDANCES 

 EPT/Chironorrudae 



1.20 



FUNCTIONAL FEEDING GROUP (FFG) COMPOSITION 



GROUP #TAXA ABUNDAN PERCENT 



Predator 



Parasite 



Collector-gatherer 



Collector-filterer 



Macroph>1e-herbivore 



Piercer-herbivore 



Scraper 



Shredder 



Xylophage 



Ommvore 



Unknown 



RATIOS OF FFG ABUNDANCES 

 Scraper/Collector-filterer 

 Scraper/(Scraper + C filterer) 

 Shredder/Total organisms 



DFVERSrrY MEASURES 

 Shannon H (loge) 

 Shannon H (log2) 

 Evenness 

 Simpson D 



1.66 

 2.39 

 0.55 

 0.16 



COMMUNITY VOLTINISM ANALYSIS 

 TYPE ABUNDANCE PERCENT 



Multivoltine 109 33 31 



Umvoltine 171 52.06 



Semivoltine 48 14.63 



Tolerant 

 Intolerant 

 C linger 



#TAXA ABUNDANCE PERCENT 



6 85 25.91 



000 



10 171 52.13 



