Is it worthy to use environmental DNA instead of scientific trawling or video survey to monitor taxa in soft-bottom habitats?

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research Pub Date : 2024-08-05 DOI:10.1016/j.marenvres.2024.106667

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引用次数: 0

Abstract

Non-extractive techniques such as video analysis are increasingly used by scientists to study marine communities instead of extractive methods such as trawling. Currently, environmental DNA (eDNA) analysis is seen as a revolutionary tool to study taxonomic diversity. We aimed to determine which method is the most appropriate to describe fish and commercial invertebrate diversity comparing bottom trawl hauls, video transects and seawater eDNA. Our results reveal that video detected the lowest number of taxa and trawling the highest. eDNA analysis is powerful to describe marine bony fish communities, but some taxa of importance for the ecosystem such as elasmobranchs, crustaceans or molluscs are poorly detected. This may be due to several factors such as marker specificity, incomplete reference gene databases or low DNA release in the environment. For now, the various methods provide different information and none is exhaustive enough to be used alone for biodiversity characterisation.

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用环境 DNA 代替科学拖网或视频调查来监测软底栖息地的分类群是否值得？

科学家们越来越多地使用视频分析等非提取技术来研究海洋生物群落，而不是使用拖网等提取方法。目前，环境 DNA（eDNA）分析被视为研究分类多样性的革命性工具。我们旨在通过比较底拖网、视频横断面和海水 eDNA，确定哪种方法最适合描述鱼类和商业无脊椎动物的多样性。我们的结果表明，视频检测到的分类群数量最少，而拖网检测到的分类群数量最多。eDNA 分析在描述海洋硬骨鱼类群落方面非常强大，但对生态系统非常重要的一些分类群，如箭鱼、甲壳类或软体动物却检测不到。这可能是标记特异性、参考基因数据库不完整或环境中 DNA 释放量低等因素造成的。目前，各种方法提供了不同的信息，但都不够详尽，不能单独用于生物多样性特征描述。

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来源期刊

Marine environmental research 环境科学-毒理学

CiteScore

5.90

自引率

3.00%

发文量

217

审稿时长

46 days

期刊介绍： Marine Environmental Research publishes original research papers on chemical, physical, and biological interactions in the oceans and coastal waters. The journal serves as a forum for new information on biology, chemistry, and toxicology and syntheses that advance understanding of marine environmental processes. Submission of multidisciplinary studies is encouraged. Studies that utilize experimental approaches to clarify the roles of anthropogenic and natural causes of changes in marine ecosystems are especially welcome, as are those studies that represent new developments of a theoretical or conceptual aspect of marine science. All papers published in this journal are reviewed by qualified peers prior to acceptance and publication. Examples of topics considered to be appropriate for the journal include, but are not limited to, the following: – The extent, persistence, and consequences of change and the recovery from such change in natural marine systems – The biochemical, physiological, and ecological consequences of contaminants to marine organisms and ecosystems – The biogeochemistry of naturally occurring and anthropogenic substances – Models that describe and predict the above processes – Monitoring studies, to the extent that their results provide new information on functional processes – Methodological papers describing improved quantitative techniques for the marine sciences.