05536272 DATA: Benthic Macroinvertebrates, 2000

ILLINOIS RIVER BASIN

05536272 NORTH CREEK BELOW 183RD STREET NR THORNTON, IL

LOCATION.-- Lat 41°33'25", long 87°35'46", in NW¼ SW¼ SW¼ sec.35, T.36N., R.14E., Cook County, Hydrologic Unit 07120003, 36 feet downstream of Bridge on Cottage Grove Road.

DRAINAGE AREA.-- 22.38 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE

PARTIAL RECORD: Miscellaneous discharge measurements, water year 2000.

SURFACE-WATER QUALITY

MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000.

BIOLOGICAL

BENTHIC MACROINVERTEBRATES: Water year 2000.

FISH: Water year 2001.

HABITAT: Water year 2000.

REMARKS FOR CURRENT YEAR.--Benthic macroinvertebrate community samples were collected as part of the National Water-Quality Assessment program (NAWQA) in the upper Illinois River Basin. One quantitative sample was collected in accordance with the NAWQA protocols (Cuffney and others, 1993). The quantitative sample was a composite of macroinvertebrates from about 10 submerged tree branches. Branches were cut underwater, gathered in a 425µm mesh net, and invertebrates were washed or picked from the branches. The average length and average diameter of each branch were measured and used to calculate an approximate surface area. All samples were processed by the USGS National Water-Quality Laboratory. Phylum, Class, Order, Suborder, Family, Subfamily, and Tribe are listed and arranged according to the USGS National Water-Quality Laboratory taxonomic hierarchy. Reach A begins 36 feet downstream of Cottage Grove Bridge and continues downstream for 656 feet. The surface area sampled at reach A was 0.35 m².

BENTHIC MACROINVERTEBRATES
[sp., species; A, Adults; LV, Larvae; P, Pupae; X, present; -, not found or not applicable; dam., damaged; imm., immature; indet., indeterminate; mount, poor mount; ref., reference]

PHYLUM
	Class
		Order							Reach A
			(Suborder)						7/12/2000
				Family
					Subfamily			Life stage	Quantitative sample		Laboratory notes
						(Tribe)
							Taxon		Abundance (count)	Density (number/m²)

CNIDARIA
	Hydrozoa
		Hydroida
				Hydridae
							Hydra sp.	-	3	9	-
PLATYHELMINTHES
	Turbellaria
							Turbellaria	-	174	495	-
MOLLUSCA
	Gastropoda
		Basommatophora
				Ancylidae
							Ancylidae	-	3	9	indet.
ANNELIDA
	Oligochaeta
		Tubificida
			(Tubificina)
				Tubificidae
							Tubificidae	-	3	9	-
		Enchytraeida
				Enchytraeidae
							Enchytraeidae	-	3	9	-
ARTHROPODA
	Arachnida
							Acari	-	6	17	-
	Malacostraca
		Isopoda
			(Asellota)
				Asellidae
							Caecidotea sp.	-	891	2535	-
	Insecta
		Collembola
							Collembola	-	3	9	-
		Ephemeroptera
			(Setisura)
				Heptageniidae
							Heptageniidae	L	22	63	imm.; dam.
							Stenacron interpunctatum (Say)	L	10	28	-
							Stenacron sp.	L	27	77	-
		Hemiptera
			(Heteroptera)
				Veliidae
					Microveliinae
							Microvelia sp.	L	3	9	-
		Coleoptera
			(Polyphaga)
				Elmidae
							Macronychus glabratus Say	L	15	43	-
		Diptera
			(Nematocera)
				Chironomidae
					Chironominae
						(Chironomini)
							Dicrotendipes sp.	L	6	17	-
							Phaenopsectra sp.	L	3	9	-
							Polypedilum sp.	L	60	171	-
							Stenochironomus sp.	L	15	43	-
					Orthocladiinae
							Brillia sp.	L	6	17	-
					Tanypodinae
						(Pentaneurini)
							Ablabesmyia sp.	L	6	17	-
			(Brachycera)
							Brachycera	P	9	26	-
				Tabanidae
							Tabanus sp.	L	3	9	-

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data