CALIFORNIA
STREAMSIDE
BIOSURVEY DATA WORKSHEET
(make multiple copies of this blank data sheet, one for each
sample)
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Date
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Stream
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Location
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Sample No.
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Stream Type Sampled:
o
Rock-bottom Riffle
o
Mud-bottom Channel (circle substrates sampled: wood / bank / plants /
bottom sediment)
INVERTEBRATE
INDICATOR GROUP COUNTS:
#
= Counts (actual number counted in each group, out of a minimum 100 total)
A
= Abundance category (R = rare <5%; C = common 5-25%; D = dominant >25%)
S
= Index Score (from Table of Index Scores)
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#
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%
A
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S
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Sensitive
Category I
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#
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%
A
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S
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Intermediate
Category II
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#
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%
A
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S
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Tolerant
Category III
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___
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Mayflies
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___
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Riffle Beetles
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___
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Midges
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___
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Stoneflies
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___
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Netspinning
Caddisflies
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___
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Black Flies
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___
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Caddisflies
(w/o netspinners)
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___
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Alderflies
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___
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Dragon- or
damselflies
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___
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Hellgrammites and (Dobson -
Fishflies)
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___
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Crane Flies &
Other Diptera
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___
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Leeches
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Sum
Score
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___
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Other
Water Beetles
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___
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Snails
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___
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Flatworms
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___
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Clams
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___
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Other/Unknown
Invertebrates
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___
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Scuds
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Sum
Score
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___
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Segmented
Worms
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Sum
Score
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Biological Index of Water Quality
= [Sum
Scores of categories I + II + III ]
Water Quality Rating [ ]
(see Rating Table)
Comparison to Reference Biol. Index [
]
Total Number # Groups Counted (all categories) = ______
SCI (sequential comparison index for n=50) = ____
Measures
of water quality (if test kits available):
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Temperature
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Dissolved Oxygen
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Alkalinity
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Turbidity
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Other?
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Appearance of
water:
clear
turbid
foam
oils
greenish
Description
of other surrounding environmental features such as
landscape and land:
INVERTEBRATE PICTURE KEY
from The California Streamside Biosurvey by Herbst,
Feng, and Gregorio
I.
SENSITIVE CATEGORY
|
Mayflies
Insect
order Ephemeroptera
Usually
have 3 tails, gills on abdomen, and feed on algae or
organic particles (detritus).
Size:
Usual- 5-10 mm,
Range- 2-15 mm
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|
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Stoneflies
Insect
order Plecoptera
Two
tails, gills on thorax but not abdomen.
Large predators and small detritovores.
Size:
Usual- 10-20 mm,
Range- 5-30 mm
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Caddisflies
Insect
order Trichoptera
Usually
construct a case but may be without, and commonly
feed on detritus or algae.
Size:
Usual- 5-10 mm,
Range- 2-25 mm
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Hellgrammites
(fishflies or dobsonflies)
Insect
order Megaloptera, Family Corydalidae
The
larvae are large and active predators, with dark
heads and long gills along the abdomen.
Size:
Usual- 20-30 mm,
Range- 10-70
mm
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II.
INTERMEDIATE CATEGORY
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Riffle
Beetles
Insect
order Coleoptera, Family Elmidae
Adults
& larvae of these small stout beetles are
dark brown, and feed on detritus & algae.
Size:
Usual- 3-5 mm,
Range- 2-10 mm
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ADULT
LARVA
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Net-Spinning
Caddisflies
Order
Trichoptera, Family Hydropsychidae
These
caddisflies attach their case to rocks and
spin a net to capture fine particle food.
Size:
Usual-
5-10 mm,
Range- 3-15 mm
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|
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Alderflies
Order
Megaloptera, Family Sialidae
Medium
size predators with gill filaments on the
sides and tip of abdomen.
Size:
Usual- 5-15 mm,
Range- up
to 25 mm
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|
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Crane
Flies (and other Diptera)
Insect
order Diptera, Family Tipulidae
Larvae
maggot-like, segmented, gills at hind
end finger-like, often feed on detritus.
Size:
Usual- 5-10
mm,
Range- up to 50 mm
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Other
Water Beetles
(Order Coleoptera)
Families
Dytiscidae & Hydrophilidae
Adults
are active swimmers, both adults and
larvae are predators or scavengers.
Size:
Usual 3-10 mm,
Range- 2-30
mm
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ADULT
LARVA
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Flatworms
(Class Turbellaria)
Order
Tricladida (commonly Planarians)
No
segments, often darker above and
lighter below, predators and
scavengers.
Size:
Usual- 5-10 mm,
Range- 3-20 mm
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Other
/ Unknown Invertebrates
Includes
mostly rare taxa of insects and
non-insects but should be counted.
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NO PICTURE
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III. TOLERANT
CATEGORY
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Midges
Insect
order Diptera, Family Chironomidae
Small
fly larvae, often feed on fine
particles.
Size:
Usual- 2-4 mm,
Range- 1-10 mm
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Black
Flies
Insect
order Diptera, Family Simuliidae
Hourglass
body-shape, particle
filter-feeder.
Size:
Usual- 4-8 mm,
Range- 2-12 mm
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Dragon-
and Damselflies
Insect
order Odonata
Stout-bodied
predators with extendable
jaws.
Size:
Usual- 10-15 Range-
5-40 mm
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Leeches
Class
Hirudinea
Body
flattened, segments &
sucker, predators.
Size:
Usual- 10-20 mm,
Range- 5-40 mm
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Snails
Class
Gastropoda
Turban/
spiral-shaped shell, feed
on algae.
Size:
Usual- 5-10 mm,
Range- 2-20 mm
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Clams
("fingernail")
Class
Bivalvia, Family
Sphaeriidae
Shells
speckled black / white,
feed on detritus.
Size:
Usual- 2-5 mm,
Range- 2-15 mm
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Scuds
("sideswimmers")
Crustacean
order Amphipoda
White-yellow,
flat, many legs,
varied food.
Size:
Usual- 4-8 mm,
Range- 2-12 mm
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Segmented
Worms
Class
Oligochaeta
Round
body many segments,
feed on detritus.
Size:
Usual- 3-10 mm,
Range- up
to 50 mm
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