. 2012 survey assessments and analysis of fish, macroinvertebrates and herpetofauna in the Otter Creek coal tracts area of Powder River County. Aquatic ecology; Aquatic invertebrates; Fishes; Amphibians; Reptiles. control site. Using the MTDEQ multimethc index (MIVII), four of the five sites (9 of 13 samples) were ranked non-impaired (good to excellent biological integrity), while two samples from Home Creek and one each from Tenmile and Otter #16 were ranked impaired (Table 4, Figure 5). Table 4. Macroinvertebrate sample characteristics and various metrics used for the DEQ MMI. Total Plains %
. 2012 survey assessments and analysis of fish, macroinvertebrates and herpetofauna in the Otter Creek coal tracts area of Powder River County. Aquatic ecology; Aquatic invertebrates; Fishes; Amphibians; Reptiles. control site. Using the MTDEQ multimethc index (MIVII), four of the five sites (9 of 13 samples) were ranked non-impaired (good to excellent biological integrity), while two samples from Home Creek and one each from Tenmile and Otter #16 were ranked impaired (Table 4, Figure 5). Table 4. Macroinvertebrate sample characteristics and various metrics used for the DEQ MMI. Total Plains % Ind. Total Total MMI EPT Non Site ID CollDate ID'ed Sample Taxa Index Tax % EPT HBI Insect OTTER_23t 5/19/2012 405 810 12 OTTER_22t 5/19/2012 581 4,648 31 OTTER_22ts 7/31/2012 521 16,672 23 OTTER_22tf 10/16/2012 535 2,274 42 0TTER_16t 5/19/2012 511 1,022 33 0TTER_16ts 7/30/2012 594 1,931 31 0TTER_16tf 10/15/2012 554 1,108 33 OTTERJTt 5/19/2012 481 1,924 31 OTTERJTts 7/30/2012 573 2,292 33 OTTERJTtf 10/15/2012 592 2,368 37 OTTER_lAt 5/20/2012 558 3,488 24 OTTER_lAts 7/30/2012 520 4,160 31 OTTER_lAtf 10/15/2012 517 3,231 26 Figure 5. DEQ MMI scores across sites and seasons. Line is the impairment threshold at 37. 70 60 o 50 tft s S 4U t at > 30 c o ^ (J m 20 E 10. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Stagliano, David M. ,author; Farmer, Pat; Montana Natural Heritage Program; Westech Environmental Services. [Helena, Montana]: Montana Natural Heritage Program
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Keywords: ., bh, booksubjectamphibians, booksubjectfishes, booksubjectreptiles
