Aquatic community structure and stream habitat in a karst agricultural landscape

Ecological Processes

Table 3 Aquatic macroinvertebrates collected from 22 sites on the South Fork Whitewater River, Minnesota, USA

Taxa	Number	Percent	Number of sites
Non-insects
Gammarus	1146	8.46	20
Hirundinea	91	0.67	14
Physella	171	1.26	15
Sphaeriidae	23	0.17	4
Faxonius	20	0.15	4
Oligochaeta	12	0.09	5
Dugesia	1	0.01	1
Plecoptera
Pteronarcys	1	0.01	1
Ephemeroptera
Caenis	34	0.25	8
Baetis	3011	22.21	20
Stenonema	54	0.40	11
Isonychia	4	0.03	2
Tricorythodes	198	1.46	11
Hexagenia	2	0.01	1
Heptagenia	4	0.03	1
Ephemerella	280	2.07	2
Trichoptera
Brachycentrus	917	6.77	17
Hydropsyche	3870	28.55	19
Cheumatopsyche	713	5.26	14
Coleoptera
Optioservus	989	7.30	20
Stenelmis	319	2.35	20
Macronychus	41	0.30	12
Dubiraphia	4	0.03	1
Megaloptera
Sialis	6	0.04	2
Odonata
Boyeria	2	0.01	2
Gomphus	1	0.01	1
Unidentified damselfly	1	0.01	1
Hemiptera
Corixidae	3	0.02	1
Diptera
Chironomidae	915	6.75	22
Dicranota	156	1.15	16
Antocha	26	0.19	7
Chrysops	2	0.01	2
Tipula	50	0.37	10
Atherix	17	0.13	5
Empididae	13	0.10	6
Simulium	453	3.34	10
Limnophora	2	0.01	2
Limonia	1	0.01	1
Pericoma	1	0.01	1
Total	13,554	100.00	22