基于环境 DNA 的水生入侵物种表现出截然不同的季节可探测性模式:对监测的影响

IF 2.8 2区 生物学 Q2 ECOLOGY
Christopher I. Rounds, Todd W. Arnold, Chan Lan Chun, Josh Dumke, Anna Totsch, Adelle Keppers, Katarina Edblad, Samantha M. García, Eric R. Larson, Jenna K. R. Nelson, Gretchen J. A. Hansen
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引用次数: 0

摘要

水生入侵物种(AIS)是对淡水生物多样性和生态系统服务的全球性威胁。在广泛的空间范围内记录 AIS 的流行情况对于有效管理和早期发现至关重要。然而,传统的 AIS 监测成本高昂,而且很少能达到有效管理所需的分辨率和规模。使用环境 DNA(eDNA)监测 AIS 有可能以传统方法的一小部分成本实现大范围监测,但必须首先解决与 eDNA 检测概率在不同环境、季节和具有不同生活史的多个物种之间如何变化有关的关键问题。为了量化利用 eDNA 采样检测 AIS 概率的时空变化,我们调查了 20 个已知有四种水生入侵物种的湖泊:鲤鱼(Cyprinus carpio)、锈小龙虾(Faxonius rusticus)、刺水蚤(Bythotrephes longimanus)和斑马贻贝(Dreissena polymorpha)。我们在每个湖泊的 10 个地点采集水样,在整个开放水域季节采集 5 次,共采集了 1,000 份水样。使用定量聚合酶链反应和物种特异性检测方法来确定水样中是否存在每个物种的 eDNA。通过贝叶斯占据模型,我们量化了湖泊和地点特征以及朱利安日期对 eDNA 检测概率的影响。eDNA的检测概率随季节而变化,季节变化具有物种特异性,并与物种的生活史有关。斑马贻贝 eDNA 通常是我们的目标物种中最容易检测到的,检测概率在仲夏达到峰值,此时只需要 6 个水样就能达到 95% 的检测概率(80% 贝叶斯可信区间:3-12 个样本)。刺水蚤 eDNA 的检测峰值也出现在仲夏至夏末,但总体而言是最难检测的物种,需要 160 个样本才能达到 95% 的检测概率(80% 贝叶斯可信区间:67-1,616 个样本)。鲤鱼的 eDNA 在春季最易检测到,锈螯虾的 eDNA 在初秋最易检测到,这与关键的生活史事件相对应。在每个物种一年中的最佳时间段采集 eDNA 样本,可将达到 95% 检测概率所需的样本数量减少一个数量级或更多。我们的研究结果对有意将 eDNA 用作多物种监测工具的决策者很有意义,并突出了生活史对 eDNA 监测效果的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Aquatic invasive species exhibit contrasting seasonal detectability patterns based on environmental DNA: Implications for monitoring

Aquatic invasive species exhibit contrasting seasonal detectability patterns based on environmental DNA: Implications for monitoring

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来源期刊
Freshwater Biology
Freshwater Biology 生物-海洋与淡水生物学
CiteScore
5.90
自引率
3.70%
发文量
162
审稿时长
2 months
期刊介绍: Freshwater Biology publishes papers on all aspects of the ecology of inland waters, including rivers and lakes, ground waters, flood plains and other freshwater wetlands. We include studies of micro-organisms, algae, macrophytes, invertebrates, fish and other vertebrates, as well as those concerning whole systems and related physical and chemical aspects of the environment, provided that they have clear biological relevance. Studies may focus at any level in the ecological hierarchy from physiological ecology and animal behaviour, through population dynamics and evolutionary genetics, to community interactions, biogeography and ecosystem functioning. They may also be at any scale: from microhabitat to landscape, and continental to global. Preference is given to research, whether meta-analytical, experimental, theoretical or descriptive, highlighting causal (ecological) mechanisms from which clearly stated hypotheses are derived. Manuscripts with an experimental or conceptual flavour are particularly welcome, as are those or which integrate laboratory and field work, and studies from less well researched areas of the world. Priority is given to submissions that are likely to interest a wide range of readers. We encourage submission of papers well grounded in ecological theory that deal with issues related to the conservation and management of inland waters. Papers interpreting fundamental research in a way that makes clear its applied, strategic or socio-economic relevance are also welcome. Review articles (FRESHWATER BIOLOGY REVIEWS) and discussion papers (OPINION) are also invited: these enable authors to publish high-quality material outside the constraints of standard research papers.
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