Mercury accumulation in adults of two large species of diving beetles (Coleoptera: Dytiscidae)

Udodenko, Yu. G.; Seleznev, D. G.; Прокин, А. А.; Ivanova, Elena; Zemlyanukhin, A. I.

doi:10.15298/rusentj.28.1.04

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…In any case, considering the average sample weight used (0.048 g) and the detection limit of the DMA 80 (0.0003 ng) [Hg], Hg must have been below 0.1 ng/g or 10 -4 mg/kg in every composite sample. That is less than reported values for any insect samples from polluted or control areas so far, including forest, rice paddies, rivers and wetlands (Cristol et al 2008;Rimmer et al 2010;Obrist et al 2011;Zhang et al 2012;Wang et al 2013;Ortiz et al 2015;Abeysinghe et al 2017;Udodenko et al 2019;Luo et al 2020). Leaf Hg values suggest that folivorous species are exposed to more Hg in diet than in other study areas and, within our study site, higher in colony than in control islands.…”

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confidence: 69%

Mercury movement from Hg-enriched wetland soils to arboreal food webs: a weak role for folivory

Zabala

Frederick

2023

Wetlands Ecol Manage

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Mercury (Hg) is a toxicant of concern, particularly in aquatic food webs. Mercury can move to terrestrial systems through consumption of aquatic prey or emergence of insects with aquatic larval phases. The possible movement of Hg from sediments to wetland plants and into terrestrial food webs though primary consumers has received less attention. We investigated differences and correlations in Hg in soil, wood and leaves of willows (Salix caroliniana) and folivorous beetles from a wetland with enhanced levels of Hg. Further, we compared samples from tree islands that had enriched Hg in soil through bird guano with control islands. Hg in any sample type did not correlate with Hg in any other sample type from the same island. We found higher [Hg] in soils and significantly higher [Hg] in leaves from colony islands, while [Hg] in beetles appeared to be higher in control islands. In any case, despite comparatively high [Hg] in soil and leaves, Hg in folivorous beetles was below detection levels and lower than that reported from other studies. We conclude that movement of Hg from wetland trees to terrestrial food webs through wetland vegetation is negligible in this ecosystem.

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