07/31/2013 Env Bd Packet - Laserfiche WebLink

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• • • In the lab, analysis was done to identify macroinvertebrates from each sampling site. Using taxonomic keys, SHEP volunteers identified the Kingdom, Phylum, Class, Order and Family of macroinvertebrate organisms. Once identified, samples were sorted, labeled and scored. 4.1.4a Field Sampling Results for Hardwood Creek "Above" Site Historical Field Results for Hardwood Creek `Above' Site Date # Identified Family Biotic Index EPT Number of Families Dominant Family Dominant Family Overall Field Sampling Results: 09/08/07 162 7.2 4 24 Hyalellidae 41% 09/20/08 143 6.3 5 19 Decapoda 24% 9/12/09 193 6.6 4 18 Chironomidae 38% 9/11/10 121 6.0 3 18 Hyalellidae 30% 8/20/11 115 5.0 3 13 Gammaridae 43% 10/2/12 177 5.0 5 18 Heptageniidae 39.5% Cross -Check Results: N/A • Ephemeroptera • Plecoptera ▪ Tricoptera • Diptera • Coleoptera • Oligochaeta • Other Hardwood Creek `Above' Data Summary Family Biotic Index (FBI): Our 2012 SHEP field sampling results produced a score of 5.0 for the Hardwood Creek `Above' site. This score corresponds to a "Good" rating on the Family Biotic Index stream health chart. This is consistent with 2011 results (5.0), and represents a continued improvement in stream health from 2007 (7.2) to 2012 (5.0). A larger, more diverse sample was identified. However, with more families with high tolerance values, the FBI score remained stable. Number of individuals: A large sample offers more confidence for a more reliable data set. SHEP protocol requires a minimum of 100 individual invertebrates to be picked and identified per sample. 177 invertebrates were identified in this sample. This sample size is adequate.