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相关概念视频

What is Biodiversity?01:19

What is Biodiversity?

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Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.
32.8K
Biodiversity and Human Values01:24

Biodiversity and Human Values

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Human civilization relies on biodiversity in many ways. Sudden changes in species biodiversity result in environmental changes that can modify weather patterns and therefore human civilizations.
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Threats to Biodiversity01:50

Threats to Biodiversity

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There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
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Measuring Biodiversity07:49

Measuring Biodiversity

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Quadrats and Transects
ExpandIn this activity, you will be using quadrats along transect lines to take biodiversity measurements of the plant species in three distinct habitats near your classroom. Begin by splitting into groups. Four works best.
Select one person in your group to be the data recorder. The other three will be the data collectors.
Next, take one quadrat, or hula hoop, per group and place it on one side of one transect, or rope, next to a knot to allow identification of the plant...
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Measuring Biodiversity05:41

Measuring Biodiversity

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Diverse ecosystems are important for the health of the planet and our survival as humans; it is therefore incredibly important for us to understand and measure biodiversity, which is defined as the variability among living organisms in an ecosystem. Biodiversity can be measured at many different levels including genetic, species, community, and ecosystem. One way to measure biodiversity is to assess species richness of an ecosystem, which is the total number of distinct species within a local...
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Assessment of DNase Activity by Ratiometric Fluorescence Resonance Energy Transfer04:55

Assessment of DNase Activity by Ratiometric Fluorescence Resonance Energy Transfer

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This study presents a simple, user-friendly ratiometric FRET assay for the detection and quantitative assessment of DNase activity, and demonstrates its application in the analysis of a weak...
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相关实验视频

Updated: Jan 20, 2026

Assessment of DNase Activity by Ratiometric Fluorescence Resonance Energy Transfer
04:55

Assessment of DNase Activity by Ratiometric Fluorescence Resonance Energy Transfer

Published on: July 25, 2025

693

基于eRNA的生物多样性评估:呼吁优化DNase处理

Fuwen Wang1,2, Wei Xiong1,2, Xuena Huang1

  • 1Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.

Molecular ecology resources
|January 19, 2026
PubMed
概括

环境DNA (eDNA) 污染可能导致环境RNA (eRNA) 元编码中的假阳性,高估生物多样性. 对于 eRNA 准确的生物多样性评估,DNase 处理至关重要.

关键词:
DNase处理 DNase处理的方法生物多样性评估评估生物多样性评估环境 DNA DNA 环境 DNA这是环境RNARNA.有错误的阳性结果.

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Biodiversity in the Ecosystem
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Measuring Biodiversity

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相关实验视频

Last Updated: Jan 20, 2026

Assessment of DNase Activity by Ratiometric Fluorescence Resonance Energy Transfer
04:55

Assessment of DNase Activity by Ratiometric Fluorescence Resonance Energy Transfer

Published on: July 25, 2025

693
Biodiversity in the Ecosystem
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Biodiversity in the Ecosystem

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Measuring Biodiversity
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Measuring Biodiversity

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科学领域:

  • 生态生态学 生态生态学
  • 分子生态学分子生态学
  • 环境监测 环境监测

背景情况:

  • 环境RNA (eRNA) 的元编码是生物多样性评估的一个关键工具.
  • 共同提取的环境DNA (eDNA) 在eRNA研究中可能导致错误的阳性物种检测.
  • 从eDNA污染中区分真正的eRNA信号是一个重大挑战.

研究的目的:

  • 量化剩余eDNA对基于eRNA的生物多样性评估的影响.
  • 评估DNase治疗在缓解eDNA转载效应方面的有效性.
  • 评估因eDNA污染而导致的物种丰富性和社区组成的变化.

主要方法:

  • 作为一个模型系统,利用一条淡水河接收废水处理厂的废水.
  • 将DNase处理和未处理的eRNA样本进行比较,以评估eDNA的影响.
  • 分析了鱼类物种丰富度和社区组成的变化.

主要成果:

  • 与处理过的样本相比,未经处理的eRNA样本的分类丰富度超过25%.
  • 剩余的eDNA膨胀了分类群的丰度,一些分类群的数量增加了10倍以上.
  • 社区成分分析显示,eDNA污染造成的重大扭曲.

结论:

  • 共同提取的eDNA显著扭曲了eRNA生物多样性估计,产生了错误的阳性.
  • 对于使用eRNA进行准确的当代社区分析,DNase处理是必不可少的.
  • 为实现标准化和可靠的eRNA监测,建议优化DNase治疗方案.