BMI Event at Six Mile Creek - Slaterville 600 Rd on 09/08/2018
Description Rationale
Details
Latitude, Longitude
42.3963, -76.3343
Miles from stream mouth
Date of sample
09-08-2018
Squares Replicate 1
3 / 24
Squares Replicate 2
2 / 24
Conducted Sampling
Lucy Gagliardo, Di Florini, Kelly Sams
Conducted Analysis
Lucy Gagliardo, Kelly Sams, Di Florini, Adrianna Hirtler
Impact Assessment Based on NYSDEC model and 100 organism count
Biological Assessment Profile 8.4
Total Family Richness 17.5
Family EPT Richness 8.5
Family Biotic Index 4.435
Percent Model Affinity 64
Percent Contribution of Dominant Family 18% Hydropsychidae
Sample Analysis Live
Organism Count and Metrics Calculations
R1 R2 Avg
Organism Density = Total Number of Organisms in Sample 1584 1716 1650
Number of organisms counted 198 143 170

Actual Count

R1 R2 Avg
Organism Density = Total Number of Organisms in Sample 1584 1716 1650
EPT Richness 11.0 12.0 11.5
Total Family Richness 19.0 22.0 20.5
Biotic Index 4.53 4.48 4.505
Dominant Family Hydropsychidae Chironomidae
Percent Contribution of Dominant Family 21 20 20
Percent Model Affinity 64 71 67
Percent Similarity Between Replicates 81 81 81
Biological Assessment Profile
Replicate 1 Replicate 2
Families in Major Groups T D T x D %C D T x D %C L
Ephemeroptera
Baetidae 6 7 42 3.5 2 12 1.4 1
Baetiscidae 4
Caenidae 6
Ephemerellidae 2
Heptageniidae 3 23 69 11.6 24 72 16.8 12
Isonychiidae 2 3 6 1.5 2 4 1.4 1
Ephemeridae 4
Leptophlebliidae 4 1 4 0.7
Metretopodidae 2
Polymitarcyidae 2
Potomanthidae 4
Siphlonuridae* 4
Leptohyphidae (Tricorythldae) 4
Ameletidae 0
Sub-total 33 17 29 20
Plecoptera
Perlidae 3 3 9 1.5 1 3 0.7 1
Capniidae 3
Chloroperlidae 0
Leuctridae 0
Nemouridae 2
Peltoperlidae 0
Perlodidae 2
Pteronarcyidae 0
Taeniopterygidae 2
Undetermined Plecoptera 2
Sub-total 3 2 1 1
Megaloptera
Corydalidae 4
Sialidae 4
Sub-total 0 0 0 0
Lepidoptera
Pyralidae 5
Sub-total 0 0 0 0
Trichoptera
Hydropsychidae 5 43 215 21.7 21 105 14.7 15
Hydroptilidae 6 2 12 1.4
Odontoceridae 0 4 0 2.0 4 0 2.8 2
Philopotamidae 3 5 15 2.5 1 3 0.7 1
Polycentropodidae 6 1 6 0.5
Rhyacophilidae 1 1 1 0.5 1 1 0.7 1
Undetermined Trichoptera 3
Brachycentridae 2
Glossosomatidae 1 2 2 1.0 1 1 0.7 1
Helicopsychidae 3 9 27 4.5 4 12 2.8 3
Lepidostomatidae 1
Leptoceridae 4
Limnephilidae 4
Molannidae 6
Phryganeidae 4
Psychomyiidae 2
Sericostomatidae 3
Uenoidae 3
Sub-total 65 33 34 24
Diptera
Athericidae 4 1 4 0.7
Ceratopgonidae 6 14 84 7.1 7 42 4.9 5
Tipulidae 4 7 28 3.5 4 16 2.8 3
Empididae 6
Undetermined Diptera 6
Blephariceridae 0
Simuliidae 5
Tabanidae 5
Stratiomyidae 7
Sub-total 21 11 12 8
Isopoda
Asellidae 8
Sub-total 0 0 0 0
Coleoptera
Elmidae 5 13 65 6.6 12 60 8.4 7
Psephenidae 4 18 72 9.1 20 80 14.0 9
Dryopidae 5
Gyrinidae 4
Haliplidae 5
Undetermined Coleoptera 5
Dytiscidae 5
Sub-total 31 16 32 22
Odonata
Coenagrionidae 8
Aeshnidae 5
Calopterygidae 6
Cordulegastridae 3
Corduliidae 2
Gomphidae 4 7 28 3.5 2 8 1.4 1
Lestidae 9
Libellulidae 2
Macromiidae 2
Sub-total 7 4 2 1
Amphipoda
Crangonyctidae 6
Gammaridae 6
Talitridae 8
Sub-total 0 0 0 0
Decapoda
Cambaridae or Astacidae 6
Sub-total 0 0 0 0
Other
Turbellaria 6 4 24 2.0 1 6 0.7 1
Nemertea 8 2 16 1.4
Hirudinea 7
Gastropoda 7
Pelecypoda 6
Hydrachnidae 6 2 12 1.0 1 6 0.7 1
Nematoda 5
Sub-total 6 3 4 3
Oligochaeta
Oligochaeta 9
Sub-total 0 0 0 0
Chironomidae
Chironomidae 6 32 192 16.2 29 174 20.3 16
Sub-total 32 16 29 20
Totals 198 100 143 100 81.0

100 Count is obtained by backing actual count down to 100 using statistics so that metrics calculations are consistent with NYSDEC model, which is based on counting 100 organisms in a sample

R1 R2 Avg
Organism Density = Total Number of Organisms in Sample
EPT Richness 10.0 7.0 8.5
Total Family Richness 18.0 17.0 17.5
Biotic Index 4.31 4.56 4.435
Dominant Family Hydropsychidae Chironomidae
Percent Contribution of Dominant Family 18 21 19
Percent Model Affinity 63 66 64
Percent Similarity Between Replicates 79 79 79
Biological Assessment Profile 8.7 8.0 8.35
Replicate 1 Replicate 2
Families in Major Groups T D T x D %C D T x D %C L
Ephemeroptera
Baetidae 6 2 12 2.0 1 6 1.0 1.0
Baetiscidae 4
Ephemerellidae 2
Heptageniidae 3 11 33 11.0 12 36 12.0 11.0
Isonychiidae 2 3 6 3.0 2 4 2.0 2.0
Ephemeridae 4
Leptophlebliidae 4 1 4 1.0
Metretopodidae 2
Polymitarcyidae 2
Potomanthidae 4
Siphlonuridae* 4
Ameletidae 0
Caenidae 6
Leptohyphidae (Tricorythldae) 4
Sub-total 16 16
Plecoptera
Perlidae 3 2 6 2.0 1.0 1.0
Capniidae 3
Chloroperlidae 0
Leuctridae 0
Nemouridae 2
Peltoperlidae 0
Perlodidae 2
Pteronarcyidae 0
Taeniopterygidae 2
Undetermined Plecoptera 2
Sub-total 2 0
Megaloptera
Corydalidae 4
Sialidae 4
Sub-total 0 0
Lepidoptera
Pyralidae 5
Sub-total 0 0
Trichoptera
Hydropsychidae 5 18 90 18.0 16 80 16.0 16.0
Hydroptilidae 6 2.0
Odontoceridae 0 2 0 2.0 4 0 4.0 2.0
Philopotamidae 3 2 6 2.0
Polycentropodidae 6
Rhyacophilidae 1 1 1 1.0 1.0 1.0
Brachycentridae 2
Glossosomatidae 1 1 1 1.0 1.0
Helicopsychidae 3 8 24 8.0 2 6 2.0 2.0
Lepidostomatidae 1
Leptoceridae 4
Limnephilidae 4
Molannidae 6
Phryganeidae 4
Psychomyiidae 2
Sericostomatidae 3
Uenoidae 3
Undetermined Trichoptera 3
Sub-total 32 22
Diptera
Athericidae 4 1 4 1.0
Ceratopgonidae 6 7 42 7.0 4 24 4.0 4.0
Tipulidae 4 5 20 5.0 3 12 3.0 3.0
Empididae 6
Blephariceridae 0
Simuliidae 5
Tabanidae 5
Stratiomyidae 7
Undetermined Diptera 6
Sub-total 12 8
Isopoda
Asellidae 8
Sub-total 0 0
Coleoptera
Elmidae 5 4 20 4.0 10 50 10.0 4.0
Psephenidae 4 13 52 13.0 17 68 17.0 13.0
Dryopidae 5
Gyrinidae 4
Haliplidae 5
Undetermined Coleoptera 5
Dytiscidae 5
Sub-total 17 27
Odonata
Coenagrionidae 8
Aeshnidae 5
Calopterygidae 6
Cordulegastridae 3
Corduliidae 2
Gomphidae 4 4 16 4.0 2 8 2.0 2.0
Lestidae 9
Libellulidae 2
Macromiidae 2
Sub-total 4 2
Amphipoda
Crangonyctidae 6
Gammaridae 6
Talitridae 8
Sub-total 0 0
Decapoda
Cambaridae or Astacidae 6
Sub-total 0 0
Other
Turbellaria 6 1 6 1.0 1 6 1.0 1.0
Nemertea 8 2 16 2.0
Hirudinea 7
Gastropoda 7
Pelecypoda 6
Nematoda 5
Hydrachnidae 6 1 6 1.0 1 6 1.0 1.0
Sub-total 2 4
Oligochaeta
Oligochaeta 9
Sub-total 0 0
Chironomidae
Chironomidae 6 15 90 15.0 21 126 21.0 15.0
Sub-total 15 21
Totals 100 100 100 105
Physical Survey
Physical Characteristics of Stream
Stream Size
Gradient
Water Level
Average stream width at sampling location 8.0 m
Average stream depth at sampling location 0.1 m
Upstream Dam within 1 km?
Recent Precipitation
Precipitation day of sampling
Precipitation previous two days
Water Appearance/Odor
Turbidity substantially greater than natural conditions?
Oily film, grease globules, or unusual odor or color present?
Algae or Weed Growth: Substantially greater than natural conditions?
Surrounding Land Use
Forest Cover
Agriculture
Human Habitation
Commercial/Industrial
Temperature
Air temperature, in degrees Centigrade 13
Water temperature, in degrees Centigrade 15
Habitat Assessment Factors
Assessment FactorExcellentGoodFairPoor
Riffle SizeWell-developed riffle, as wide as stream & as long as 2x stream widthRiffle as wide as stream but riffle length less than 2x stream widthRiffle not as wide as stream and length less than 2x stream widthRiffles or run virtually non-existent
Substrate size (at BMI collection site)Cobble predominates; boulders, gravel commonCobble less abundant; boulders and gravel commonGravel, boulders or bedrock prevalent; some cobbleLarge boulders and bedrock or sand & silt prevalent; cobble lacking
Shelter for fishSnags, submerged logs, undercut banks, or other stable habitat are found in over 50% of the siteSnags, submerged logs, undercut banks, or other stable habitat are found in 30-50% of the siteSnags, submerged logs, undercut banks, or other stable habitat are found in 10-30% of the siteSnags, submerged logs, undercut banks, or other stable habitat are found in less than 10% of the site
Embeddedness (at BMI collection site)Rocks in stream <25% embedded; very little sand, silt, or mudRocks 25-50% embedded; can easily turn over rocksRocks 50-75% embedded and firmly stuck in sedimentsRocks >75% embedded; bottom mostly sand, silt, or mud
Flow pattern (deep is > 2 ft)All 4 patterns present: slow/deep, fast/shallow, fast/deep, slow/shallowOnly 3 of 4 flow patterns presentOnly 2 of 4 flow patterns presentDominated by 1 flow pattern
Channel AlterationStream straightening, dredging, artificial embankments, dams or bridge abutments absent or minimal; stream with meandering patternSome stream straightening, dredging, artificial embankments or dams present, usually near bridge abutments; no recent channel alterationArtificial embankments present to some extent on both banks; and 40-80% of stream site straightened, dredged, or otherwise alteredBanks shored with gabion or cement; over 80% of the stream site straightened and disrupted
Stream bank cover and stability*Banks stable; no evidence of erosion; bank covered by vegetation or rockModerately stable; small areas of erosion; most of bank covered by vegetation or rockLargely unstable; almost half of bank has areas of erosion or is not covered by vegetation or rockUnstable, eroded; less than half of bank covered by egetation or rock, or rock slumping into creek
Disruption of riparian bank coverage* (land bordering stream bank)Mature trees and vegetation; most growing naturally; no disturbance by forestry, grazing, or mowingTrees, woody plants, soft green plants dominate; some disruption but not affecting full plant growth potentialObvious disruption; patches of bare soil, cultivated fields or closely cropped vegetation are the normNot much natural vegetation left or it has been removed to 3” in height
Width of riparian vegetation zone*More than 35 meters wide; human activities have not impacted zoneZone 12-35 yards wide; marginal impact from human activitiesZone 6-12 yards wide; impact from human activities evidentZone less than 6 yards wide; lots of nearby human activities
LitterNo litter (metal or plastic)Very little litter; accidentally droppedLitter fairly common; purposely droppedLots of litter present; obviously dumped

* Where the two banks were very different, the worst side was assessed.

Stream Bottom Survey
Silt/clay/mud
Sand
Gravel 32
Cobbles 64
Boulders 4
Bedrock
Predominant Cobble Embededness

0-25%