BMI Event at Fall Creek - Downstream of Lake St on 09/25/2016
Description Rationale
Details
Latitude, Longitude
42.4533, -76.4957
Miles from stream mouth
Date of sample
09-25-2016
Squares Replicate 1
3 / 12
Conducted Sampling
Paul Allderige, Fred and Janet Rimmel, Adrianna Hirtler
Conducted Analysis
Paul Allderige, Carol Hardy, Adrianna Hirtler
Impact Assessment Based on NYSDEC model and 100 organism count
Biological Assessment Profile 7.4
Total Family Richness 11.0
Family EPT Richness 8.0
Family Biotic Index 3.88
Percent Model Affinity 63
Percent Contribution of Dominant Family 40% Heptageniidae
Sample Analysis Preserved
Organism Count and Metrics Calculations
R1
Organism Density = Total Number of Organisms in Sample 1516
Number of organisms counted 379

Actual Count

R1
Organism Density = Total Number of Organisms in Sample 1516
EPT Richness 8.0
Total Family Richness 15.0
Biotic Index 3.87
Dominant Family Heptageniidae
Percent Contribution of Dominant Family 35
Percent Model Affinity 65
Percent Similarity Between Replicates 0
Biological Assessment Profile
Replicate 1
Families in Major Groups T D T x D %C L
Ephemeroptera
Baetidae 6 12 72 3.2
Baetiscidae 4
Caenidae 6 24 144 6.3
Ephemerellidae 2 10 20 2.6
Heptageniidae 3 136 408 35.9
Isonychiidae 2 28 56 7.4
Ephemeridae 4
Leptophlebliidae 4
Metretopodidae 2
Polymitarcyidae 2
Potomanthidae 4
Siphlonuridae* 4
Leptohyphidae (Tricorythldae) 4
Ameletidae 0
Sub-total 210 55
Plecoptera
Perlidae 3 2 6 0.5
Capniidae 3
Chloroperlidae 0
Leuctridae 0
Nemouridae 2
Peltoperlidae 0
Perlodidae 2
Pteronarcyidae 0
Taeniopterygidae 2
Undetermined Plecoptera 2
Sub-total 2 1
Megaloptera
Corydalidae 4
Sialidae 4
Sub-total 0 0
Lepidoptera
Pyralidae 5
Sub-total 0 0
Trichoptera
Hydropsychidae 5 49 245 12.9
Hydroptilidae 6
Odontoceridae 0
Philopotamidae 3 38 114 10.0
Polycentropodidae 6
Rhyacophilidae 1
Undetermined Trichoptera 3
Brachycentridae 2
Glossosomatidae 1
Helicopsychidae 3
Lepidostomatidae 1
Leptoceridae 4
Limnephilidae 4
Molannidae 6
Phryganeidae 4
Psychomyiidae 2
Sericostomatidae 3
Uenoidae 3
Sub-total 87 23
Diptera
Athericidae 4
Ceratopgonidae 6
Tipulidae 4 1 4 0.3
Empididae 6 1 6 0.3
Undetermined Diptera 6
Blephariceridae 0
Simuliidae 5
Tabanidae 5
Stratiomyidae 7
Sub-total 2 1
Isopoda
Asellidae 8 1 8 0.3
Sub-total 1 0
Coleoptera
Elmidae 5 48 240 12.7
Psephenidae 4 15 60 4.0
Dryopidae 5
Gyrinidae 4
Haliplidae 5
Undetermined Coleoptera 5
Dytiscidae 5
Sub-total 63 17
Odonata
Coenagrionidae 8
Aeshnidae 5
Calopterygidae 6
Cordulegastridae 3
Corduliidae 2
Gomphidae 4
Lestidae 9
Libellulidae 2
Macromiidae 2
Sub-total 0 0
Amphipoda
Crangonyctidae 6
Gammaridae 6
Talitridae 8
Sub-total 0 0
Decapoda
Cambaridae or Astacidae 6
Sub-total 0 0
Other
Turbellaria 6
Nemertea 8
Hirudinea 7
Gastropoda 7
Pelecypoda 6
Hydrachnidae 6
Nematoda 5 1 5 0.3
Sub-total 1 0
Oligochaeta
Oligochaeta 9
Sub-total 0 0
Chironomidae
Chironomidae 6 13 78 3.4
Sub-total 13 3
Totals 379 100 0.0

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 8.0 8.0
Total Family Richness 11.0 11.0
Biotic Index 3.88 3.88
Dominant Family Heptageniidae
Percent Contribution of Dominant Family 40 40
Percent Model Affinity 63 63
Percent Similarity Between Replicates 0 0
Biological Assessment Profile 7.4 7.4
Replicate 1 Replicate 2
Families in Major Groups T D T x D %C D T x D %C L
Ephemeroptera
Baetidae 6 4 24 4.0
Baetiscidae 4
Ephemerellidae 2 2 4 2.0
Heptageniidae 3 40 120 40.0
Isonychiidae 2 5 10 5.0
Ephemeridae 4
Leptophlebliidae 4
Metretopodidae 2
Polymitarcyidae 2
Potomanthidae 4
Siphlonuridae* 4
Ameletidae 0
Caenidae 6 3 18 3.0
Leptohyphidae (Tricorythldae) 4
Sub-total 54 0
Plecoptera
Perlidae 3 1 3 1.0
Capniidae 3
Chloroperlidae 0
Leuctridae 0
Nemouridae 2
Peltoperlidae 0
Perlodidae 2
Pteronarcyidae 0
Taeniopterygidae 2
Undetermined Plecoptera 2
Sub-total 1 0
Megaloptera
Corydalidae 4
Sialidae 4
Sub-total 0 0
Lepidoptera
Pyralidae 5
Sub-total 0 0
Trichoptera
Hydropsychidae 5 12 60 12.0
Hydroptilidae 6
Odontoceridae 0
Philopotamidae 3 7 21 7.0
Polycentropodidae 6
Rhyacophilidae 1
Brachycentridae 2
Glossosomatidae 1
Helicopsychidae 3
Lepidostomatidae 1
Leptoceridae 4
Limnephilidae 4
Molannidae 6
Phryganeidae 4
Psychomyiidae 2
Sericostomatidae 3
Uenoidae 3
Undetermined Trichoptera 3
Sub-total 19 0
Diptera
Athericidae 4
Ceratopgonidae 6
Tipulidae 4
Empididae 6
Blephariceridae 0
Simuliidae 5
Tabanidae 5
Stratiomyidae 7
Undetermined Diptera 6
Sub-total 0 0
Isopoda
Asellidae 8
Sub-total 0 0
Coleoptera
Elmidae 5 20 100 20.0
Psephenidae 4 4 16 4.0
Dryopidae 5
Gyrinidae 4
Haliplidae 5
Undetermined Coleoptera 5
Dytiscidae 5
Sub-total 24 0
Odonata
Coenagrionidae 8
Aeshnidae 5
Calopterygidae 6
Cordulegastridae 3
Corduliidae 2
Gomphidae 4
Lestidae 9
Libellulidae 2
Macromiidae 2
Sub-total 0 0
Amphipoda
Crangonyctidae 6
Gammaridae 6
Talitridae 8
Sub-total 0 0
Decapoda
Cambaridae or Astacidae 6
Sub-total 0 0
Other
Turbellaria 6
Nemertea 8
Hirudinea 7
Gastropoda 7
Pelecypoda 6
Nematoda 5
Hydrachnidae 6
Sub-total 0 0
Oligochaeta
Oligochaeta 9
Sub-total 0 0
Chironomidae
Chironomidae 6 2 12 2.0
Sub-total 2 0
Totals 100 100 0 0
Physical Survey
Physical Characteristics of Stream
Stream Size
Gradient
Water Level
Average stream width at sampling location 4.0 m
Average stream depth at sampling location 0.3 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 15
Water temperature, in degrees Centigrade 16
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 2
Gravel 19
Cobbles 42
Boulders 29
Bedrock 8
Predominant Cobble Embededness

25-50%