Biotic Index and Feeding Type Calculations

∑ Abundance x Tolerance Values Family BI = Total Abundance

Mayflies Family BI value General Feeding type Baetiscidae 3.0 Scraper Family BI Value General Feeding type Ephemeridae 4.0 Collector (gatherer) 4.0 Collector (filterer) Potomanthidae 4.0 Collector (gatherer) 3.0 Collector (filterer) Polymitarcyidae 2.0 Collector (gatherer) 6.0 Collector/Shredder Neoephemeridae 2.0 Collector (gatherer) 2.0 Collector (gatherer) Caenidae 7.0 Collector (gatherer) 0.0 Sraper/Collector Ephemerellidae 1.0 Collector (gatherer) 4.0 Piercer/Scraper Tricorythidae 4.0 Collector (gatherer) 0.0 Predator/Scraper Leptophlebiidae 2.0 Shredder Brachycentridae 1.0 Collector (filterer) Oligoneuridae 2.0 Collector (filterer) Lepidostomatidae 1.0 Shredder Heptageniidae 4.0 Scraper 4.0 Scraper/Shredder Metretopodidae 2.0 Predator Phryganeidae 4.0 Shredder Siphlonuridae 7.0 Scraper Beraeidae 1.0 Collector (gatherer) Baetidae 4.0 Scraper Calamoceratidae - Shredder Helicopsychidae 3.0 Scraper Stoneflies 4.0 Shredder/Collector Family BI Value General Feeding type Molannidae 6.0 Scraper/Predator Nemouridae 2.0 Shredder (Collector) Odontoceridae 0.0 Collector (gatherer) Taeniopterygidae 2.0 Generally a Shredder Sericostomatidae 3.0 Shredder/Collector Capniidae 1.0 Shredder Leuctridae 0.0 Shredder Pteronarcyidae 0.0 Shredder/Scraper Peltoperlidae 2.0 Shredder Perlodidae 2.0 Collector/Predator Chloroperlidae 1.0 Predator/Collector Perlidae 2.0 Predator

From "Introduction to & Ecology of EPT" (NCSU Workshop, Funded by NCDENR & EPA 319) 6 Biotic Index Worksheet

Family Identifications Mayflies Abundance Values Biotic Index Values Abundance x BI =

Stoneflies Abundance Values Biotic Index Values Abundance x BI =

Caddisflies Abundance Values Biotic Index Values Abundance x BI =

Total Abundance1 = ∑ =

∑ Abundance x Tol. Values / Total Abundance Biotic Index Value =

1 Use this number when calculating the functional feeding groups also.

From "Introduction to Taxonomy & Ecology of EPT" (NCSU Workshop, Funded by NCDENR & EPA 319) 7

Percent Composition of Functional Feeding Group Worksheets

Family Total General Identifications Abundance Feeding Type Mayflies

Stoneflies

Caddisflies

From "Introduction to Taxonomy & Ecology of EPT" (NCSU Workshop, Funded by NCDENR & EPA 319) 8 Site 1:

Total % Composition Functional Feeding Abundance by (abundance by group Groups feeding group / total density) Total Shredders Total Scrapers Total Collectors (filtering) Total Collectors (gatherers) Total Predators

Site 2:

Total % Composition Functional Feeding Abundance by (abundance by group Groups feeding group / total density) Total Shredders Total Scrapers Total Collectors (filtering) Total Collectors (gatherers) Total Predators

Site 3:

Total % Composition Functional Feeding Abundance by (abundance by group Groups feeding group / total density) Total Shredders Total Scrapers Total Collectors (filtering) Total Collectors (gatherers) Total Predators

From "Introduction to Taxonomy & Ecology of EPT" (NCSU Workshop, Funded by NCDENR & EPA 319) 9