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相关概念视频

Sampling Plans01:23

Sampling Plans

155
Sampling is a crucial step in analytical chemistry, allowing researchers to collect representative data from a large population. Common sampling methods include random, judgmental, systematic, stratified, and cluster sampling.
Random sampling is a method where each member of the population has an equal chance of being selected for the sample. It involves selecting individuals randomly, often using random number generators or lottery-type methods. For example, when analyzing the properties of a...
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Stratified Sampling Method01:16

Stratified Sampling Method

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Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. The sampling method ensures that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
To choose a stratified sample, divide the population into groups called strata and then take a...
11.6K
Cluster Sampling Method01:20

Cluster Sampling Method

11.5K
Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
11.5K
Systematic Sampling Method01:17

Systematic Sampling Method

9.9K
Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
Systematic sampling is one of the simplest methods...
9.9K
What is Biodiversity?01:19

What is Biodiversity?

26.9K
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.
26.9K
Convenience Sampling Method00:55

Convenience Sampling Method

8.5K
Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population.
Convenience sampling is a non-random method of sample selection; this method selects individuals that are easily accessible and may result in biased data. For example, a marketing...
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相关实验视频

Updated: May 7, 2025

Deploying Community Scientists to Conduct Nondestructive Genetic Sampling of Rare Butterfly Populations
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LIFEPLAN:一个全球生物多样性采样设计.

Bess Hardwick1, Deirdre Kerdraon2, Hanna M K Rogers2

  • 1Organismal and Evolutionary Biology Research Programme, University of Helsinki, Helsinki, Finland.

PloS one
|December 31, 2024
PubMed
概括

在LIFEPLAN项目中,开发了五种全球实地采样方法,用于收集生物多样性数据,整合传感器技术和用于物种识别的自动处理. 这些协议确保在全球范围内为生态研究收集一致的数据.

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科学领域:

  • 生态生态学 生态生态学
  • 生物多样性科学 生物多样性科学
  • 环境监测 环境监测

背景情况:

  • 物种识别技术的快速进步需要标准化的全球数据收集方法.
  • 该LIFEPLAN项目解决了在各种环境中系统采集生物多样性数据的需求.
  • 现有的方法需要与新兴的基于传感器和自动化数据处理能力进行整合.

研究的目的:

  • 在LIFEPLAN项目中描述全球生物多样性数据收集的五种标准化现场采样方法.
  • 详细说明收集各种生物和环境数据的协议,包括图像,音频和DNA.
  • 建立未来比较和生物多样性监测技术进步的基准.

主要方法:

  • 开发和实施五种不同的现场采样技术.
  • 使用红外摄像头陷用于动物图像,音频记录器用于环境声音,马莱斯陷用于无脊椎动物DNA,气旋样本用于空气中的真菌DNA.
  • 系统地选择国际城市和自然采样地点,在特定地区设计嵌套规模.

主要成果:

  • 在全球各地成功部署了五种标准化采样方法.
  • 收集各种数据集,包括动物图像,环境音频录音和来自无脊椎动物,土壤和空气的DNA.
  • 强调全面的元数据收集,以确保数据的可用性和一致性.

结论:

  • 描述的LIFEPLAN采样方法为全球生物多样性评估提供了一个强大的框架.
  • 标准化协议有助于统一收集数据,这对于大规模的生态研究至关重要.
  • 这些方法具有适应性,并作为评估未来生物多样性监测技术改进的基准.