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Show • Ecological Risk Assessment Northern Oquirrh Mountains Mean (standard deviation in parentheses) trophic transfer factors Table 21. for CoC based on 11 sampling sites in northern Oquirrh Mountains.1 Zinc Arsenic Cadmium Selenium 0.14 Copper EQ Lead 0.085 0.025 0.84 EQ (0.064) (0.10) 0.04-0.40 (0.036) (0.79) 0.14-1.15 Soil to all plants 0.061 0.066 EQ 0.014 0.55 EQ!:) (0.044) (0.085) 0.04-0.32 (0.017) (0.50) 0.10-0.72 son to grasses 0.10 0.20 EQo 0.032 1.08 EQ' (0.11) (0.13) 0.02-0.44 (0.047) (1.22) 0.19-1.61 Soil to forbs Soil to surface-dwelling 0.37 0.59 EQ 0.038 0.93 EQ invertebrates (0.56) (0.24) 0.07-1.53 (0.025) (0.70) 0.16-3.07 Plants to foliar invertebrate herbivores 1.00 8.02 2.22 1.55 2.21 (1.32) (9.21) (0.92) (0.83) Foliar invertebrates 2.06 1.10 (0.84) EQ1U 5.14 (4.79) 1.13 (2.41) (0.75) 0.33-1.36 0.66 (0.44) EQ" (herbivore to carnivore) 0.54-1.99 (0.17) Diet to Peromyscus 0.020 0.89 1.61 0.34 4.50 0.68 (0.53) (2.32) I, Iiver12 (0.025) (1.10) (2.19) Diet to Peromyscus whole 0.11 0.20 0.47 1.27 2.03 (0.17) EQ'4 boav (0.09) (0.11 ) (0.32) (1.53) (1.68) 0.34-0.98 Diet to herbivore liver" 0.073 1.79 EQ10 0.11 4.60 (0.118) (1.96) 0.30-0.98 (0.10) (4.45) 1.01 I' (0.30) Diet to herbivore whole 0.12 0.50 0.61 0.99 3.01 EQ10 body (0.10) (0.32) (0.58) (0.83) (2.74) 0.67-1.38 1 Cells marked MEa" represent cases where the TIF is significantly related to the CoC concentration of the source material, so the TIF is more appropriately presented as an equation. The range of TIF among sampling sites also is resented. TTF soil:all plants 3 4 5 6 7 8 s 10 11 12 = 0.719!(0.235±O.034) log soil Cu conc., n=11, R2=0.84, p<0.OOO1. TIF soil:all plants = 2.251-(0.762±O.083) log soil Zn conc., n=11, R2=0.90, p<0.OOO1. TIF soil:grasses = 0.557-(0.174±0.042) log soil Cu conc.), n=11, R2=0.66, p=0.OO25. TIF soil:grasses = 1.222-(0.403±0.063) log soil Zn conc., n=11, R2=0.82, p=0.OO01. TIF soil:forbs = 0.821-(0.273±0.038) log soil Cu conc., n=11, R2=0.85, p<O.OO01. TIF soil:forbs = 3.097-(1.066±O.160) log soil Zn conc., n=11, R2=0.83, p=O.OO01. I, TIF soil:surface-dwelling invertebrates = 0.086+exp(4.667+(-2.816)*log soil Cu cone.), n=11, R2= 0.88. TIF soil:surface-dwelling invertebrates = 5.954-(2.072±O.385) log soil Zn conc., n=11, R2= 0.74, p=0.OO04. TIF herbivorous:camivorous invertebrates = 1.381-(0.OO71±0.OO17) herbivore Cu conc., n=11, R2= 0.67, p=0.0021. TIF herbivorous:camivorous invertebrates = 0.645+exp(0.336+(-O.438)*herbivore Se cone.), n=11, R2= 0.68. Diet for Peromyscus assumed to be 61 % invertebrates and 37% plant material plus 2% soil based on Flake (1973) cited in USEPA (1993). 13 Diet for herbivorous mammals assumed to be 98% plant material plus 2% soil. Mean trophic transfer factor based on herbivore values from 7 of the 11 sampling sites. 14 15 16 (O.0042±O.0005) diet Zn conc., n=11, R2=0.88, p<0.OOO1. rTF diet herbivorous mammal liver = 1.032-(0.013±O.004) diet Cu conc., n=7, R2= 0.69, p=0.0198. rTF diet herbivore body = 1.86 (0.OO92±O.OOO9) diet Zn conc., n=11, R2=0.96, 0=0.0001. TIF dietPeromyscus body = 1.25 - - The TTF from plants to herbivorous foliar invertebrates ranged from 1.0 for As to 8.02 for Cd (Table 21), indicating that invertebrate CoC concentrations were generally higher than plants with a few exceptions in Pine Canyon (Appendix 9). The TTF from herbivorous to carnivorous invertebrates, on the other hand, were generally smaller and ranged from 0.66 for Pb to 2.06 for As, while the TTF for Cu and Se decreased with increasing CoC concentration in the herbivorous invertebrates (Table 21). The concentration of Se in herbivorous invertebrates invertebrates (range 0.45-13.7 mg/kg) varied more than in carnivorous (range 0.84-8.72 mg/kg). Consequently, the Se TTF from herbivorous to ecological planning and toxicology, inc. 53 |
