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<br />Nine [axa of benthic mac roinvertebrates were identified (Mariah, 1980). No obli- <br />gate rheophiles were noted, Tube worms (Tubifex sp.) were dominant, i.e. hund- <br />reds were collected. Fingernail clams (Shpaerium sp.), mayflies (Callibaetis <br />sp.) and midges (Procladius sp.) were com<son. The other species were represented <br />by six or fewer specimens. <br />The third site (Site 4kN3-NW 1/4, NW 1/4, Section 34, T6N, R91W) was a 3 to 4 inch <br />deep pool (7.6-10.2 cm) about one foot wide and two to three fee[ in length iso- <br />lated at the base of a head cut. The temperature was 19.5°C (61.2°F) and the <br />bottom was sand and gravel. Both [he inflow into the pool (depositional zone) <br />and out of it was sampled. <br />Seven taxa of benthic macroinvertebrates were identified <Mariah, 1980). He <br />obligate rheophiles were collected. Anthomyiids (Limnophora sp.) were the most <br />common and all other species were represented by only one or two specimens. <br />• The fourth site (Site 4kN4-NW 1/4, NW 1/4, Section 34, T6N, R91W) was a narrow <br />(4-6 inches) and relatively fast moving section (three feet long) below a small <br />pool (about one and one-half fee[ across and in length) formed by' another head <br />cut. The temperature was 20°C (68°F) and the bottom was sand and gravel. <br />Ten [axa of benthic mac roinvertebrates were identified (Mariah, 1980). One (1) <br />obligate rheophile species, blackfly larvae (Simulium), was collected. However, <br />they only represented 5.9 percent of the specimens collected. Seed shrimp <br />(Ostracoda), tube worms (Tubifex), and midges (Procladius) were the most preva- <br />lent. The other species were represented by a single specimen. <br />Most Os[racoda, P.ennak (1980), are collected from mud bottoms of lentic and lotic <br />habitats where there is little or no current. Tubifex and Procladius are predom- <br />inantly lentic or Lotic depositional in habitants. Zimmerman (1980) felt that <br />the Simulium sp. were probably accidental to this site. Simulidae can in fact be <br />found in most lotic habitats from the smallest trickle to [he largest river (Mer- <br />ritt and Cummins, 1978). <br /> <br />J-7 <br />