Relative importance of dietary uptake and waterborne exposure for a leaf-shredding amphipod exposed to thiacloprid-contaminated leaves.
Relative importance of dietary uptake and waterborne exposure for a leaf-shredding amphipod exposed to thiacloprid-contaminated leaves.
复制标题
DOI：
10.1038/s41598-017-16452-9
复制
发表时间：
2017-11-23
影响因子：
4.6
通讯作者：
Bundschuh M
中科院分区：
文献类型：
--
作者：
Englert D;Zubrod JP;Pietz S;Stefani S;Krauss M;Schulz R;Bundschuh M
系统性烟碱类化合物通常用于森林害虫管理计划。然而，含有类烟碱的衰老叶片可能会从处理过的树木掉落到附近的溪流中。在那里，切碎叶子的无脊椎动物由于其饮食（以类烟碱污染的叶子为食）或通过水相（从叶子中沥滤类烟碱）而受到特别的暴露-这是水生环境风险评估期间未考虑的一个事实。为了解开这些途径的相关性，我们使用的树叶从树木处理的类烟碱噻虫啉受片足类粉碎机Gammarus fossarum为21天（n = 40）无论是饮食，水或组合（饮食+水）的曝光。与对照组相比，饮食暴露导致钩虾叶消耗量（约35%）和脂质含量（约20%）减少，与水媒暴露途径（30%和22%）观察到的减少相似。在综合接触下观察到的效应大小表明，使用“独立作用”参考模型，效应的加和性在很大程度上是可以预测的。由于钩虾的累积量（与接触途径无关）高达280纳克/克噻虫啉，因此饮食接触也可能与捕食钩虾的捕食者有关。因此，忽视膳食暴露可能会低估系统性杀虫剂对生态系统完整性造成的环境风险，这要求在评估和登记化学压力时予以考虑。
Systemic neonicotinoids are commonly used in forest pest management programs. Senescent leaves containing neonicotinoids may, however, fall from treated trees into nearby streams. There, leaf-shredding invertebrates are particularly exposed due to their diet (feeding on neonicotinoid-contaminated leaves) or collaterally via the water phase (leaching of a neonicotinoid from leaves) – a fact not considered during aquatic environmental risk assessment. To unravel the relevance of these pathways we used leaves from trees treated with the neonicotinoid thiacloprid to subject the amphipod shredder Gammarus fossarum for 21 days (n = 40) either to dietary, waterborne or a combined (dietary + waterborne) exposure. Dietary exposure caused – relative to the control – similar reductions in gammarids’ leaf consumption (~35%) and lipid content (~20%) as observed for the waterborne exposure pathway (30 and 22%). The effect sizes observed under combined exposure suggested additivity of effects being largely predictable using the reference model “independent action”. Since gammarids accumulated – independent of the exposure pathway – up to 280 ng thiacloprid/g, dietary exposure may also be relevant for predators which prey on Gammarus. Consequently, neglecting dietary exposure might underestimate the environmental risk systemic insecticides pose for ecosystem integrity calling for its consideration during the evaluation and registration of chemical stressors.
登录
查看更多内容
影响因子：
4.1
作者：
Benton, Elizabeth P.;Grant, Jerome F.;Bailey, Joseph K.
通讯作者：
Bailey, Joseph K.
影响因子：
2.2
作者：
Dilling, Carla;Lambdin, Paris;Rhea, Rusty
通讯作者：
Rhea, Rusty
影响因子：
11.4
作者：
Englert, Dominic;Zubrod, Jochen P.;Bundschuh, Mirco
通讯作者：
Bundschuh, Mirco
DOI：
10.1007/s00244-007-9104-3
发表时间：
2008-08-01
影响因子：
4
作者：
Beketov, Mikhail A.;Liess, Matthias
通讯作者：
Liess, Matthias
影响因子：
5.7
作者：
Douglas, Margaret R.;Rohr, Jason R.;Tooker, John F.
通讯作者：
Tooker, John F.