摘要
环境DNA(eDNA)是指生物有机体在环境中(例如土壤、沉积物或水体)遗留下的DNA片段。eDNA技术是指从环境中提取DNA片段进行测序以及数据分析来反映环境中的物种或群落信息。与传统方法相比, eDNA技术具有高灵敏度、省时省力、无损伤等优点。目前, eDNA技术已成为一种新的水生生物监测方法,主要应用于水生生物的多样性研究、濒危和稀有动物的物种状态及外来入侵动物扩散动态的监测等。本文从eDNA技术在水生生物多样性监测应用领域的发展历程、eDNA技术的操作流程以及其在监测淡水底栖大型无脊椎动物方面的应用进展、技术优势和局限性五个方面进行了综述。最后,本文对eDNA技术在淡水底栖大型无脊椎动物多样性监测应用的发展趋势和前景作出展望。
Environmental DNA(eDNA) refers to DNA fragments that organisms leave behind in their surrounding environment(such as soil,sediment and water).eDNA technology sequences theseDNA fragments and can provide information on taxonomic composition of benthic macroinvertebrate communities.Compared with traditional biological survey methods,eDNA technology is more sensitive,efficient and noninvasive.As a novel method for surveying aquatic organisms,eDNA techniques have been widely used in biodiversity assessments of aquatic organisms,including monitoring of endangered,rare and invasive species.In this review,we summarize recent developments in eDNA technology and focus primarily on the operational procedure and its application for freshwater benthic macroinvertebrate analyses.Finally,we discuss the advantages and potential caveats of current eDNA practices.
引文
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