Stream Invertebrate Survey
Streamkeepers Handbook and Modules Module 4
Stream Location and Conditions
| Stream Name/Nearest Town: Nicoamen River, south of Lytton | Date: August 29, 2001 |
Watershed Code: |
| Organization Name:The Pacific Streamkeepers Federation | Steam Segment # |
| Stream Section # |
| Contact Person: Zo Ann Morten |
Phone # 604-986-5059 |
| Sampler used, mesh size, total area sampled: serber, 363 microns, .092 metres | # of 30cm x 30cm samples: 1 |
Survey Location
Boulder, cobble creek between road crossing to forestry campground/logging road. 10m upstream of trans Canada hwy bridge.
| Time: 12:45 pm | Weather: | clear |
| Turbidity: greater than depth | Temperature: | Air: 240 Water: 140 |
Invertebrate Survey Field Data
| COLUMN A |
COLUMN B |
COLUMN C |
COLUMN D |
| Pollution Tolerance |
Number Counted |
Number of Taxa |
Common Name |
CATEGORY 1
(pollution
intolerant) |
7 |
3 | Caddisfly Larva (EPT) |
| 0 |
0 | Dobsonfly (hellgrammite) |
| 0 |
0 | Gilled Snail |
| 86 |
12 | Mayfly Nymph (EPT) |
| 2 |
1 | Riffle Beetle |
| 14 |
3 | Stonefly Nymph (EPT) |
| 0 |
0 | Water Penny |
| Subtotal |
109 |
19 |
Subtotal |
CATEGORY 2
(somewhat tolerant
of pollution) |
0 |
0 | Alderfly Larve |
| 0 |
0 | Aquatic Beetle |
| 0 |
0 | Aquatic Sowbug |
| 0 |
0 | Clam, Mussel |
| 0 |
0 | Cranefly Larva |
| 0 |
0 | Crayfish |
| 0 |
0 | Damselfly Larva |
| 0 |
0 | Dragonfly Larva |
| 0 |
0 | Fishfly Larva |
| 0 |
0 | Scud |
| 1 |
1 | Watersnipe Larva |
| Subtotal |
1 |
1 |
Subtotal |
CATEGORY 3
(pollution
tolerant) |
0 |
0 | Aquatic Worm |
| 0 |
0 | Blackfly Larva |
| 0 |
0 | Leech |
| 32 |
3 | Midge Larva (chironomid) |
| 1 |
1 | Planarian |
| 0 |
0 | Pouch and Pond Snails |
| 0 |
0 | true Bug Adult |
| 0 |
0 | Water Mite |
| Subtotal |
45 |
7 |
Subtotal |
| TOTAL |
155 |
27 | TOTAL |
Invertebrate Survey Interpretation
A) Abundance and Density
From page 27 of Module 4 Invertebrate Survey in the Streamkeepers handbook and Modules
| Abundance: 155 |
| Density: 1722.22 |
B) Predominant Taxon: Mayfly
C) Water Quality Assessments:
| Pollution Tolerant Index |
| Good |
Acceptable |
Marginal |
Poor |
| >22 |
22-17 |
16-11 |
greater than 11 |
|
Pollution Tolerance Index:
7 (acceptable) |
| EPT Index |
| Good |
Acceptable |
Marginal |
Poor |
| >8 |
5-8 |
2-5 |
0-1 |
|
EPT Index:
18 (good) |
| EPT to Total Ratio |
| Good |
Acceptable |
Marginal |
Poor |
| 0.75 - 1.00 |
0.50 - 0.75 |
0.25 - 0.50 |
0 - 0.25 |
|
EPT to Total Ratio:
.69 (acceptable) |
D) Diversity Assessments:
| Total Number of Taxa: 27 |
| Predominant Taxon Ratio |
| Good |
Acceptable |
Marginal |
Poor |
| 0 - .40 |
0.40 - 0.60 |
0.60 - 0.80 |
0.80 - 1.0 |
|
Predominant Taxon Ratio:
.55 (acceptable) |
E) Site Assessment Rating:
| Site Assessment Rating |
| Good |
Acceptable |
Marginal |
Poor |
| 0.75 - 1.00 |
0.50 - 0.75 |
0.25 - 0.50 |
0 - 0.25 |
|
| Site Assement Rating |
| Index or Ratio |
Rating |
| Pollution Tolerance Index |
3 |
| EPT Index |
4 |
| EPT to Total Ratio |
3 |
| Predominant Taxon Ratio |
3 |
| Total |
13 |
| Average |
3.25
(acceptable) |
|
General Comments - Unknown Bugs
none
|
Return to Site 3
Top of Page
This page courtesy of The Pacific Streamkeepers Federation
October 01, 2001
|