Variation in Zn, C, and N isotope ratios in three stream insects
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 μg/g dry weight (dw) in water str...
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| Format: | Article |
| Language: | English |
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Canadian Science Publishing
2016-11-01
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| Series: | FACETS |
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| Online Access: | http://www.facetsjournal.com/doi/10.1139/facets-2016-0023 |
| _version_ | 1818132252315353088 |
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| author | R. Douglas Evans Wei Wang Hayla E. Evans R. Bastian Georg |
| author_facet | R. Douglas Evans Wei Wang Hayla E. Evans R. Bastian Georg |
| author_sort | R. Douglas Evans |
| collection | DOAJ |
| description | 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 μg/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 μg/g dw and 125 ± 26 μg/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 < 0.05) among the three species suggesting differences in trophic positioning. Similar to the Zn isotope ratios, δ 13C values for the water striders (−28.61‰ ± 0.98‰) were significantly different than those of the stoneflies and caddisflies, i.e., −30.75‰ ± 1.33‰ and −30.68‰ ± 1.01‰, respectively. The data suggest that the differences observed in Zn ratios relate to food source for these insects. Similar to their carbon sources, Zn in water striders appears to be primarily of terrestrial origin, and of aquatic origin for the other two species. |
| first_indexed | 2024-12-11T08:33:52Z |
| format | Article |
| id | doaj.art-7de41df57fc445b6894749a8a031a993 |
| institution | Directory Open Access Journal |
| issn | 2371-1671 2371-1671 |
| language | English |
| last_indexed | 2024-12-11T08:33:52Z |
| publishDate | 2016-11-01 |
| publisher | Canadian Science Publishing |
| record_format | Article |
| series | FACETS |
| spelling | doaj.art-7de41df57fc445b6894749a8a031a9932022-12-22T01:14:24ZengCanadian Science PublishingFACETS2371-16712371-16712016-11-01120521610.1139/facets-2016-0023Variation in Zn, C, and N isotope ratios in three stream insectsR. Douglas Evans0Wei Wang1Hayla E. Evans2R. Bastian Georg3School of the Environment, Trent University, 1600 West Bank Drive, Peterborough, ON K9L 0G2, Canada; Water Quality Centre, 1600 West Bank Drive, Peterborough, ON K9L 0G2, CanadaSchool of the Environment, Trent University, 1600 West Bank Drive, Peterborough, ON K9L 0G2, CanadaSchool of the Environment, Trent University, 1600 West Bank Drive, Peterborough, ON K9L 0G2, Canada; Water Quality Centre, 1600 West Bank Drive, Peterborough, ON K9L 0G2, CanadaWater Quality Centre, 1600 West Bank Drive, Peterborough, ON K9L 0G2, CanadaTotal 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 μg/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 μg/g dw and 125 ± 26 μg/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 < 0.05) among the three species suggesting differences in trophic positioning. Similar to the Zn isotope ratios, δ 13C values for the water striders (−28.61‰ ± 0.98‰) were significantly different than those of the stoneflies and caddisflies, i.e., −30.75‰ ± 1.33‰ and −30.68‰ ± 1.01‰, respectively. The data suggest that the differences observed in Zn ratios relate to food source for these insects. Similar to their carbon sources, Zn in water striders appears to be primarily of terrestrial origin, and of aquatic origin for the other two species.http://www.facetsjournal.com/doi/10.1139/facets-2016-0023food sourcestream insectszinccarbonnitrogen isotope ratios |
| spellingShingle | R. Douglas Evans Wei Wang Hayla E. Evans R. Bastian Georg Variation in Zn, C, and N isotope ratios in three stream insects FACETS food source stream insects zinc carbon nitrogen isotope ratios |
| title | Variation in Zn, C, and N isotope ratios in three stream insects |
| title_full | Variation in Zn, C, and N isotope ratios in three stream insects |
| title_fullStr | Variation in Zn, C, and N isotope ratios in three stream insects |
| title_full_unstemmed | Variation in Zn, C, and N isotope ratios in three stream insects |
| title_short | Variation in Zn, C, and N isotope ratios in three stream insects |
| title_sort | variation in zn c and n isotope ratios in three stream insects |
| topic | food source stream insects zinc carbon nitrogen isotope ratios |
| url | http://www.facetsjournal.com/doi/10.1139/facets-2016-0023 |
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