Sedimentary DNA can reveal the past population dynamics of a pelagic copepod

Sedimentary DNA can reveal the past population dynamics of a pelagic copepod
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沉积DNA可以揭示远洋桡足类过去的种群动态

DOI:
10.1111/fwb.14096
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发表时间:
2023
期刊:
影响因子:
2.7
通讯作者:
Narumi Tsugeki
Narumi Tsugeki
中科院分区:
生物学2区
文献类型:
--
作者:
Kai Nakane;Xin Liu;Hideyuki Doi;Gael Dur;Michinobu Kuwae;Syuhei Ban;Narumi Tsugeki

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桡足类作为次级生产者发挥着关键的营养作用,将初级生产转移到更高的营养水平,例如鱼类。桡足类生产对成功补充鱼类有重大贡献。尽管很重要,但由于缺乏足够采样和分析的长期数据系列,几十年来对桡足类动力学的了解仍然有限。然而,为了更好地管理可持续水生生态系统和鱼类补充,迫切需要了解桡足类的长期动态。沉积 DNA (sedDNA) 一直在发展成为重建过去浮游生物动态的有用工具。本研究评估了针对琵琶湖(日本)中上层桡足类 Eodiaptomus japonicus 的 sedDNA 是否可以成为阐明其过去种群动态的有效工具。我们应用了针对两个沉积物核心上的线粒体细胞色素 C 氧化酶亚基 I 基因的定量聚合酶链反应方法,并将检测到的 sedDNA 浓度与独特的长期数据集进行了比较 大肠杆菌的人口特征、生物量、特定生长率、产量、亚卵和休眠卵。刺参的 sedDNA 浓度。从沉积物层中回收的刺参与原位产量、生物量和立即孵化卵的产量显着相关,但与休眠卵或特定生长率无关。我们的研究为有效使用 sedDNA 作为评估过去桡足类生产动态的跟踪工具提供了证据。
Copepods play a key trophic role as secondary producers, transferring primary production to higher trophic levels such as fish. Copepod production contributes significantly to successful fish recruitment. Despite their importance, knowledge of copepod dynamics over several decades remains limited due to the lack of long‐term data series with adequate sampling and analysis. However, an understanding of long‐term copepod dynamics is urgently required to strive toward better management for sustainable aquatic ecosystems and fish recruitment.Sedimentary DNA (sedDNA) has been developing as a useful tool for reconstructing past plankton dynamics. This study evaluates whether sedDNA targeting the pelagic copepod,Eodiaptomus japonicus, in Lake Biwa (Japan) can be an effective tool for elucidating its past population dynamics.We applied a quantitative polymerase chain reaction method targeting the mitochondrial cytochrome c oxidase subunit I gene on two sediment cores and compared the detected sedDNA concentrations with the unique long‐term dataset of demographic traits, biomass, specific growth rate, production, subitaneous eggs, and resting eggs ofE. japonicus.The sedDNA concentration ofE. japonicusrecovered from sediment layers correlated significantly with in situ production, biomass, and production of immediately hatching eggs but not with resting eggs or specific growth rate. Our study provides evidence for the effective use of sedDNA as a tracking tool for assessing past copepod production dynamics.
琵琶湖(日本)多年生桡足类 Eodiaptomus japonicus 的休眠卵
DOI: 10.1080/20442041.2019.1671766
发表时间: 2020
期刊: Inland Waters
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