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首页> 外文期刊>Freshwater science >Environmental DNA as a new method for early detection of New Zealand mudsnails (Potamopyrgus antipodarum)
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Environmental DNA as a new method for early detection of New Zealand mudsnails (Potamopyrgus antipodarum)

机译：环境DNA作为新西兰泥指甲（Potamopyrgus antipodarum）早期发现的新方法

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摘要

Early detection of aquatic invasive species is a critical task for management of aquatic ecosystems. This task is hindered by the difficulty and cost of surveying aquatic systems thoroughly. The New Zealand mudsnail (Potamopyrgus antipodarum) is a small, invasive parthenogenic mollusk that can reach very high population densities and severely affects ecosystem functioning. To assist in the early detection of this invasive species, we developed and validated a highly sensitive environmental deoxyribonucleic acid (eDNA) assay. We used a dose-response laboratory experiment to investigate the relationship between New Zealand mudsnail density and eDNA detected through time. We documented that as few as 1 individual in 1.5 L of water for 2 d could be detected with this method, and that eDNA from this species may remain detectable for 21 to 44 d after mudsnail removal. We used the eDNA method to confirm the presence of New Zealand mudsnail eDNA at densities as low as 11 to 144 snails/m~2 in a eutrophic 5~(th)-order river. Combined, these results demonstrate the high potential for eDNA surveys to assist with early detection of a widely distributed invasive aquatic invertebrate.
机译：早期发现水生入侵物种是管理水生生态系统的关键任务。彻底调查水生系统的难度和成本阻碍了这项任务。新西兰泥螺（Potamopyrgus antipodarum）是一种小的侵入性孤雌软体动物，可以达到很高的种群密度，并严重影响生态系统的功能。为了帮助及早发现这种入侵物种，我们开发并验证了一种高度敏感的环境脱氧核糖核酸（eDNA）分析方法。我们使用剂量反应实验室实验来研究新西兰泥钉密度与随时间检测的eDNA之间的关系。我们记录了用这种方法在1.5升水中进行2 d检出的个体只有1例，而去除泥钉后，该物种的eDNA可能仍可检测到21到44 d。我们使用eDNA方法确定了富营养化5级（第4级）河中新西兰泥螺eDNA的存在，其密度低至11到144蜗牛/ m〜2。结合起来，这些结果证明了eDNA调查在协助早期发现广泛分布的侵入性水生无脊椎动物方面的巨大潜力。

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