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H eadwater M acro-invertebrate F ield E valuation I ndex (HMFEI)

H eadwater M acro-invertebrate F ield E valuation I ndex (HMFEI). Photo by Garrett Rauckhorst. HMFEI Basics. WHAT is it? A rapid bio-assessment field method using benthic macroinvertebrates A method to predict the number of cool water taxa present WHY use it?

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H eadwater M acro-invertebrate F ield E valuation I ndex (HMFEI)

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  1. Headwater Macro-invertebrate Field Evaluation Index(HMFEI) Photo by Garrett Rauckhorst

  2. HMFEI Basics • WHAT is it? • A rapid bio-assessment field method using benthic macroinvertebrates • A method to predict the number of cool water taxa present • WHY use it? • A good predictor of Primary Headwater Habitat (PHWH) stream class • A good method of separating Class II PHWH streams from Class I and Class III PHWH streams

  3. HMFEI Basics continued • HOW use it? • Collect macro-invertebrates using standard protocol • Identify specimen to appropriate taxonomic level • Multiply each taxon1 by its value as identified on the HMFEI field form • Use the HMFEI table to classify the stream. • WHEN use it? • If HHEI is ambiguous2

  4. Macro-invertebrate Identification • A useful key for benthic macroinvertebrates can be found at http://www.wvdep.org/Docs/13545_WVSOS%20Couplet%20key.pdf The Dichotomous Key begins on page 6 Couplet Key begins on page 15

  5. Field Guide to Aquatic Invertebrates • Another good online identification resource can be found at http://www.wvdep.org/Docs/12924_Guide_to_Aquatic_Invertebrates.pdf • Includes identification to family level

  6. Table Summaries

  7. Integrity of HMFEI Field identification usually inferior to voucher sample identification A thorough field collection of all habitats required Collector needs taxonomic experience Photo by Katie Eppley

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