Environmental DNA captures elasmobranch diversity in a temperate marine ecosystem
Environmental DNA captures elasmobranch diversity in a temperate marine ecosystem
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环境 DNA 捕捉温带海洋生态系统中软骨鱼类的多样性
作者：
Liu Z
许多鲨鱼、鳐鱼和鳐鱼都受到商业渔业活动的高度威胁，对它们的分布、多样性和丰度有一个清晰的认识可以指导保护措施。然而，调查和监测elasmobranch物种可能是高度侵入性或资源密集型的，利用非侵入性的基于环境DNA的方法可以克服这些问题。在这里，我们使用在每年周期（2017-2018）定期从表面和底部水域收集的环境DNA （eDNA）研究了西英吉利海峡板鳃纲群落的空间和季节变化。我们在eDNA样本中总共恢复了13种板蝗科物种，并且转化的eDNA读取数与从105年时间序列拖网数据（1914-2018）中解析的物种（每小时）捕获量呈正相关。这些结果表明，eDNA能够检测和半定量地反映该地区历史上优势和罕见的elasmobranch物种的流行情况。值得注意的是，在相同的采样年份（2017-2018年），eDNA在同一地区的每次采样事件中记录的物种数量多于传统拖网调查。在eDNA内恢复了几种受威胁的物种，包括波状鳐、鼠鲨和长尾鲨。利用eDNA，我们发现了采样站之间和季节之间的板鳃草群落差异，但采样深度之间没有差异。总的来说，我们的研究结果表明，基于非侵入性eDNA的方法可以用于研究温带陆架生境中整个板形纲群落的多样性和丰度的空间和季节变化。鉴于在人类影响的海洋环境中，许多板鳃亚目受到威胁，eDNA分析有望提供其多样性和分布的关键信息，为保护重点监测和管理提供信息。
Many sharks, skates, and rays (elasmobranchs) are highly threatened by the activities of commercial fisheries, and a clear understanding of their distributions, diversity, and abundance can guide protective measures. However, surveying and monitoring elasmobranch species can be highly invasive or resource‐intensive, and utilization of non‐invasive environmental DNA‐based methods may overcome these problems. Here, we studied spatial and seasonal variation in the elasmobranch community of the Western English Channel using environmental DNA (eDNA) collected from surface and bottom waters periodically over an annual cycle (2017–2018). In total we recovered 13 elasmobranch species within eDNA samples, and the number of transformed eDNA reads was positively associated with species (hourly) catch data resolved from 105‐year time series trawl data (1914–2018). These results demonstrate the ability of eDNA to detect and semi‐quantitatively reflect the prevalence of historically dominant and rare elasmobranch species in this region. Notably, eDNA recorded a greater number of species per sampling event than a conventional trawl survey in the same area over the same sampling years (2017–2018). Several threatened species were recovered within the eDNA, including undulate ray, porbeagle shark, and thresher shark. Using eDNA, we found differences in elasmobranch communities among sampling stations and between seasons, but not between sampling depths. Collectively, our results suggest that non‐invasive eDNA‐based methods can be used to study the spatial and seasonal changes in the diversity and abundance of whole elasmobranch communities within temperate shelf habitats. Given the threatened status of many elasmobranchs in human‐impacted marine environments, eDNA analysis is poised to provide key information on their diversity and distributions to inform conservation‐focused monitoring and management.
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经过半个多世纪的观察，天使鲨几乎消失了
影响因子：
3.1
作者：
Hiddink J
通讯作者：
Hiddink J
雌性小斑角鲨Scylorhinus canicula L.的年繁殖周期及其内分泌控制
DOI：
--
发表时间：
1979
期刊：
影响因子：
--
作者：
J. Sumpter;J. M. Dodd
通讯作者：
J. M. Dodd
影响因子：
4.6
作者：
Kelly, Ryan P.;Shelton, Andrew Olaf;Gallego, Ramon
通讯作者：
Gallego, Ramon
标记-重捕标记的鳉科空间生态学及其对评估渔业相互作用和海洋保护区功效的影响
影响因子：
2.4
作者：
Simpson S
通讯作者：
Simpson S
DOI：
10.1098/rspb.2016.0717
发表时间：
2016-07-13
影响因子：
4.7
作者：
Lea, James S. E.;Humphries, Nicolas E.;Sims, David W.
通讯作者：
Sims, David W.