Identifying risks to ecosystems from contaminants needs a diversity of bioindicators, to understand the effects of these contaminants on a range of taxa. Molluscs are an ideal bioindicator because they are one of the largest phyla with extremely high ecological and economic importance. The aim of this study was to evaluate if laboratory bred has the potential to show the impact of contaminants from various land use activities and degree of pollution on a freshwater ecosystem. We assessed the impact of contaminants arising from runoff and direct discharges in Merri Creek by measuring organism level responses (survival, growth, and reproduction), and sub-organism level responses (glutathione S-transferase (GST) activity, lipid peroxidation (LPO) activity and catalase (CAT) activity) in snails after 28-d of deployment at nine sites in Merri Creek and one site in Cardinia Creek. In Merri Creek, the top two sites were reference sites (with low impact from human activities), while the rest were impact sites (impacted by various anthropogenic land uses). Cardinia Creek (an additional reference site) had lower human activity. High concentrations of heavy metals, nutrients, and/or synthetic pyrethroids (bifenthrin) dominated these sites, which are likely to have contributed towards the negative responses observed in the snails. There was little influence from environmental conditions and site location on the endpoints because we found a similar response at an additional reference site compared to the reference sites in Merri Creek. At the organism level, reproduction increased and/or reduced, while CAT was affected at the sub-organism level. has the potential to be a sensitive bioindicator for Australian conditions because the snails responded to varying concentrations of contaminants across different land use activities and showed similar sensitivity to found in other regions of the globe and other bioindicators.

中文翻译：

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Potamopyrgus antipodarum 有潜力检测各种土地利用活动对淡水生态系统的影响

识别污染物对生态系统的风险需要多种生物指示剂，以了解这些污染物对一系列类群的影响。软体动物是理想的生物指示剂，因为它们是最大的门之一，具有极高的生态和经济重要性。本研究的目的是评估实验室培育是否有可能显示各种土地利用活动污染物的影响以及淡水生态系统的污染程度。我们通过测量生物水平反应（生存、生长和繁殖）和亚生物水平反应（谷胱甘肽 S-转移酶 (GST) 活性、脂质过氧化 (LPO)）来评估 Merri Creek 径流和直接排放污染物的影响在 Merri Creek 的 9 个地点和 Cardinia Creek 的 1 个地点部署 28 天后，蜗牛中的活性和过氧化氢酶（CAT）活性）。在 Merri Creek，前两个地点是参考地点（人类活动影响较小），其余地点是影响地点（受各种人类活动土地利用的影响）。 Cardinia Creek（另一个参考地点）的人类活动较少。这些地点主要含有高浓度的重金属、营养物质和/或合成拟除虫菊酯（联苯菊酯），这可能导致了在蜗牛中观察到的负面反应。环境条件和站点位置对端点的影响很小，因为与 Merri Creek 的参考站点相比，我们在其他参考站点发现了类似的响应。在生物体水平上，繁殖增加和/或减少，而 CAT 在亚生物体水平上受到影响。有潜力成为澳大利亚状况的敏感生物指示剂，因为蜗牛对不同土地利用活动中不同浓度的污染物做出反应，并且表现出与全球其他地区和其他生物指示剂相似的敏感性。