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Macroinvertebrate Update Title Page
Tables

Table 1.

Number of random sample sites for macroinvertebrates by study reach and aquatic strata.

Study reach	Year	Backwater contiguous	Impoundeda	Side channel	Main channel border	Total
Pool 4	1992	49b	24	24	25	122
	1993	57	44	10	10	121
	1994	60	45	10	10	125
	1995	56	44	10	11	121
	1996	50	44	17	10	121
	1997	55	44	11	11	121
	1998	57	44	11	9	121
	1999	55	44	10	11	120
	2000	56	44	11	9	120
	2001	57	44	10	8	119
	2002	57	44	10	10	121
	2003c	–	–	–	–	–
	2004	57	44	10	10	121
aImpounded area for Pool 4 is Lake Pepin, a Tributary Delta Lake. bContains backwater contiguous and contiguous floodplain shallow aquatic areas. cSampling not conducted in 2003 because of budget constraints.

 

Study reach	Year	Backwater contiguous	Impounded	Side channel	Main channel border	Total
Pool 8	1992	47	14	23	25	109
	1993	29	52	18	10	109
	1994	32	49	19	12	112
	1995	31	49	19	10	109
	1996	31	49	19	10	109
	1997	34	49	19	10	112
	1998	34	47	18	10	109
	1999	31	49	19	10	109
	2000	31	48	18	10	107
	2001	31	49	19	9	108
	2002	31	49	19	10	109
	2003	31	49	19	10	109
	2004	31	45	19	10	105

 

Study reach	Year	Backwater contiguous	Impounded	Side channel	Main channel border	Total
Pool 13	1992	48	24	21	25	118
	1993	43	47	14	15	119
	1994	48	47	15	15	125
	1995	44	45	11	15	115
	1996	43	47	13	15	118
	1997	43	46	14	15	118
	1998	43	46	14	15	118
	1999	43	46	14	15	118
	2000	42	47	14	15	118
	2001	43	46	13	15	117
	2002	43	46	14	15	118
	2003	43	45	14	15	117
	2004	43	46	14	15	118

 

Study reach	Year	Backwater contiguous	Impounded	Side channel	Main channel border	Total
Pool 26	1992	30	31	29	27	117
	1993	32	27	4	3	66
	1994	40	27	38	19	124
	1995a	39	27	1	–	67
	1996	37	25	32	18	112
	1997	12	30	30	15	87
	1998	12	12	31	17	72
	1999	40	27	33	17	117
	2000	40	28	34	16	118
	2001	35	27	35	18	115
	2002	28	27	34	15	104
	2003b	–	–	–	–	–
	2004	33	27	34	17	111
aSampling not completed because of high water. bSampling not conducted in 2003 because of budget constraints.

 

Study reach	Year	Side channel	Main channel border	Total
Open River Reach	1992	46	46	92
	1993a	—	—	—
	1994	49	35	84
	1995	71	42	113
	1996	69	38	107
	1997a	—	—	—
	1998	65	43	108
	1999	65	43	108
	2000	52	45	97
	2001b	—	—	—
aSampling not conducted in 1993 or 1997 because of high water. bSampling discontinued in 2001.

 

Study reach	Year	Backwater contiguous	Side channel	Main channel border	Total
La Grange Pool	1992	23	38	41	102
	1993	25	35	38	98
	1994	41	42	41	124
	1995	24	35	38	97
	1996	33	33	32	98
	1997	24	35	40	99
	1998	24	34	41	99
	1999	24	35	39	98
	2000	26	32	41	99
	2001	25	33	40	98
	2002	24	35	40	99
	2003a	–	–	–	–
	2004	24	35	40	99
aSampling not conducted in 2003 because of budget constraints.

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Content manager: Jennie Sauer

July 18, 2006
Page Last Modified: April 17, 2018