TY - JOUR T1 - Variation in Zn, C, and N isotope ratios in three stream insects AU - Evans, R. Douglas AU - Wang, Wei AU - Evans, Hayla E. AU - Georg, R. Bastian Y1 - 2016/11/16 PY - 2016 DA - 2017/01/01 N1 - doi: 10.1139/facets-2016-0023 DO - 10.1139/facets-2016-0023 T2 - FACETS JF - FACETS SP - 205 EP - 216 VL - 1 PB - Canadian Science Publishing N2 - Total Zn concentrations and Zn isotope ratios were measured, using multicollector inductively coupled plasma (ICP)-mass spectrometry (MS), in three species of aquatic insects collected from a stream in Peterborough, Ontario, Canada. Total Zn levels averaged 193?±?88 ?g/g dry weight (dw) in water striders (Heteroptera: Gerridae, Aquarius remigis) and were significantly higher than the concentrations measured in stonefly nymphs (Plecoptera: Perlidae, Acroneuria abnormis) and caddisfly larvae (Trichoptera: Limnephilidae, Pycnopsyche guttifer), i.e., 136?±?34 ?g/g dw and 125?±?26 ?g/g dw, respectively. Average delta values for 66Zn/64Zn in the water striders were approximately 0.7? lighter (?1.2??±?1.0?) and were significantly different than those measured for stoneflies (?0.45??±?0.62?) and caddisflies (?0.51??±?0.54?). Nitrogen isotope ratios were significantly different (P?