Critical tissue residue approach linking accumulated metals in aquatic insects to population and community-level effects
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Abstract
Whole body Zn concentrations in individuals (n = 825) from three aquatic insect taxa (mayflies Rhithrogena spp. and Drunella spp. and the caddisfly Arctopsyche grandis) were used to predict effects on populations and communities (n = 149 samples). Both mayflies accumulated significantly more Zn than the caddisfly. The presence/absence of Drunella spp. most reliably distinguished sites with low and high Zn concentrations; however, population densities of mayflies were more sensitive to increases in accumulated Zn. Critical tissue residues (634 μg/g Zn for Drunella spp. and 267 μg/g Zn for Rhithrogena spp.) caused a 20% reduction in maximum (90th quantile) mayfly densities. These critical tissue residues were associated with exposure to 7.0 and 3.9 μg/L dissolved Zn for Drunella spp. and Rhithrogena spp., respectively. A threshold in a measure of taxonomic completeness (observed/expected) was observed at 5.4 μg/L dissolved Zn. Dissolved Zn concentrations associated with critical tissue residues in mayflies were also associated with adverse effects in the aquatic community as a whole. These effects on populations and communities occurred at Zn concentrations below the U.S. EPA hardness-adjusted continuous chronic criterion.
Publication type | Article |
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Publication Subtype | Journal Article |
Title | Critical tissue residue approach linking accumulated metals in aquatic insects to population and community-level effects |
Series title | Environmental Science & Technology |
DOI | 10.1021/es200215s |
Volume | 45 |
Issue | 16 |
Year Published | 2011 |
Language | English |
Publisher | American Chemical Society |
Publisher location | Washington, D.C. |
Contributing office(s) | Central Mineral and Environmental Resources Science Center |
Description | 7 p. |
First page | 7004 |
Last page | 7010 |
Google Analytic Metrics | Metrics page |