9/11/2004 Columbia Slough Collection Results

Thanks once again to everyone for participating, and thanks to the Columbia Slough Watershed Council for supporting this project. You've helped us learn a lot about the Slough! Below are lists of macroinvertebrates collected at our three 9/11/2004 sample sites. I included images of the critters we collected, though a couple are relatives and not the actual species we collected. Enjoy, it's all because of your superb volunteer efforts! In 2005, we will gather even more samples and learn more about the diversity of life and biomonitoring in the Slough (click here to learn more about biomonitoring). If you have any questions or comments, just let me know.
Sincerely, JEff - jadams@xerces.org 503-232-6639 www.xerces.org

or side-by-side picture lists

21st Ave. Rest. Island
Columbia Slough
9/11/04

COMMON NAMES - SCIENTIFIC NAMES ___ #
SNAILS GASTROPODA
snails - Lymnaeidae ___ 15
left-handed snails - Pysa ___ 1

CRUSTACEANS CRUSTACEA
sowbugs - Caecidotea ___ 1
scuds - Hyalella ___ 11

MAYFLIES EPHEMEROPTERA
minnow mayfly - Callibaetis ___ 6

DRAGONFLIES DRAGONFLIES
bluet Coenagrion/Enallagma ___ 23

TRUE BUGS TRUE BUGS
water boatmen - Corixidae ___ 62

BEETLES COLEOPTERA
riffle beetle adult Dubiraphia (A) ___ 2
predaceous diving beetle adult Dytiscidae (A) ___ 1

TRUE FLIES DIPTERA
shore flies - Ephydridae (pupa) ___ 1

# OF TAXA ___ 9
# OF INDIVIDUALS ___ 82

Upstream of the Buffalo Slough Confluence
Columbia Slough
9/11/04

COMMON NAMES - SCIENTIFIC NAMES ___ #
SEGMENTED WORMS ANNELIDA
leeches - Helobdella stagnalis ___ 1

SNAILS GASTROPODA
snails - Lymnaeidae ___ 4
left-handed snails - Pysa ___ 9
planorbid or flat snails - Gyraulus/Menetus ___ 5
planorbid or flat snails - Vorticifex ___ 32
fingernail clams - Pisidium ___ 1

CRUSTACEANS CRUSTACEA
sowbugs - Caecidotea ___ 2
scuds - Hyalella ___ 1

DRAGONFLIES DRAGONFLIES
bluet - Coenagrion/Enallagma ___ 3
darner - Aeshna ___ 1

TRUE BUGS TRUE BUGS
water boatmen - Corixidae ___ 2

BEETLES COLEOPTERA
water scavenger beetle larvae - Enochrus (L) ___ 1

TRUE FLIES DIPTERA
midges - Chironomidae ___ 1

# OF TAXA ___ 13
# OF INDIVIDUALS ___ 63

Upstream of confluence with Columbia Slough
Buffalo Slough
9/11/04

COMMON NAMES - SCIENTIFIC NAMES ___ #
SEGMENTED WORMS ANNELIDA
worms - Oligochaeta ___ 6
leeches - Helobdella stagnalis ___ 5

SNAILS GASTROPODA
left-handed snails - Pysa ___ 4
planorbid or flat snails - Gyraulus ___ 1
planorbid or flat snails - Vorticifex ___ 1
fingernail clams - Pisidium ___ 3

CRUSTACEANS CRUSTACEA
sowbugs - Caecidotea ___ 2
scuds - Hyalella ___ 18
scuds - Crangonyx ___ 1

MAYFLIES EPHEMEROPTERA
minnow mayfly - Callibaetis ___ 4

DRAGONFLIES DRAGONFLIES
bluet - Coenagrion/Enallagma ___ 2

TRUE BUGS TRUE BUGS
water boatmen - Corixidae ___ 36

ALDERFLIES/FISHFLIES MEGALOPTERA
alderflies - Sialis ___ 13

BEETLES COLEOPTERA
crawling water beetle adult - Haliplus (A) ___ 1
weevil - Curculionidae ___ 1

TRUE FLIES DIPTERA
midges - Chironomidae ___ 77
shore flies - Ephydridae (pupa) ___ 1

# OF TAXA ___ 17
# OF INDIVIDUALS ___ 176