Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

What are Populations and Communities?00:30

What are Populations and Communities?

33.7K
Overview
33.7K
Conservation of Small Populations02:04

Conservation of Small Populations

13.1K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
13.1K
Distribution and Dispersion00:54

Distribution and Dispersion

21.6K
To understand intra-specific interactions in populations, scientists measure the spatial arrangement of species individuals. This geographic arrangement is known as the species distribution or dispersion. Highly territorial species exhibit a uniform distribution pattern, in which individuals are spaced at relatively equal distances from one another. Species that are highly tied to particular resources, such as food or shelter, tend to concentrate around those resources, and thus exhibit a...
21.6K
Keystone Species01:39

Keystone Species

21.5K
Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a...
21.5K
Mutation, Gene Flow, and Genetic Drift01:09

Mutation, Gene Flow, and Genetic Drift

57.9K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
57.9K
Trophic Efficiency00:46

Trophic Efficiency

20.3K
Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
20.3K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Exosome-mediated hepatocellular carcinoma progression by modulating macrophage metabolic reprogramming and macrophage M2 polarization via exosome-derived hsa_circ_0057320-miR-28-5p/E2F6 axis.

Journal of translational medicine·2026
Same author

Microbiome-Wide Association Studies of Host Beneficial Microbes and Their Functional Mechanisms and Promising Applications in Sustainable Crops.

Plant, cell & environment·2026
Same author

Antioxidant Nanozymes: From Rational Design to Biomedical Applications.

Research (Washington, D.C.)·2026
Same author

The burden and unique patterns of extraintestinal manifestations in Chinese inflammatory bowel disease: a nationwide multicenter investigation.

Clinical and experimental medicine·2026
Same author

Regulation of Myogenic Cell Apoptosis, UPS, and Autophagy During Mammalian Skeletal Myogenesis.

Cells·2026
Same author

Global trends in the burden of inflammatory bowel disease from 1990 to 2021: socioeconomic and sex-specific disparities with exploratory mendelian randomization analyses.

Clinical and experimental medicine·2026

相关实验视频

Updated: May 31, 2025

Using Pharmacological Manipulation and High-precision Radio Telemetry to Study the Spatial Cognition in Free-ranging Animals
08:28

Using Pharmacological Manipulation and High-precision Radio Telemetry to Study the Spatial Cognition in Free-ranging Animals

Published on: November 6, 2016

6.7K

阿穆尔软海 (Pelodiscus maackii) 种群规模,结构和空间分布

Xiaochen Hou1, Haitao Shi2

  • 1School of Life Science, Tonghua Normal University, Tonghua 134001, China.

Animals : an open access journal from MDPI
|January 25, 2025
PubMed
概括

保护中国东北部的阿穆尔软海 (AST) 是至关重要的. 这项研究估计了AST种群密度,并确定了关键息地,为有效的保护策略提供了重要的数据.

关键词:
阿穆尔的软海.封闭的人口封闭人口.保护 保护 保护连续时间捕获再捕获方法.人口大小 人口规模.

更多相关视频

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging
09:19

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Published on: April 18, 2025

314
Assessing Intertidal Populations of the Invasive European Green Crab
06:48

Assessing Intertidal Populations of the Invasive European Green Crab

Published on: September 16, 2020

5.9K

相关实验视频

Last Updated: May 31, 2025

Using Pharmacological Manipulation and High-precision Radio Telemetry to Study the Spatial Cognition in Free-ranging Animals
08:28

Using Pharmacological Manipulation and High-precision Radio Telemetry to Study the Spatial Cognition in Free-ranging Animals

Published on: November 6, 2016

6.7K
Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging
09:19

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Published on: April 18, 2025

314
Assessing Intertidal Populations of the Invasive European Green Crab
06:48

Assessing Intertidal Populations of the Invasive European Green Crab

Published on: September 16, 2020

5.9K

科学领域:

  • 生态生态学 生态生态学
  • 保护生物学 保护生物学
  • 类学 类学 类学 类学

背景情况:

  • 淡水的保护需要了解种群动态和分布.
  • 中国东北部的阿穆尔软贝 (AST) 由于意识和保护不足,面临着人口急剧下降.
  • 对于这种脆弱的物种,迫切需要采取保护措施.

研究的目的:

  • 调查乌苏里河珠宝岛地区的阿穆尔软贝 (AST) 种群密度和结构.
  • 使用连续时间捕获-重新捕获方法来估计封闭群体中的AST群体大小.
  • 分析环境变量对研究区域内AST分布的影响.

主要方法:

  • 在2022年进行了一项为期三个月的标记回收研究.
  • 分析了35个未成年捕获的捕获-重新捕获数据 (来自23个标记的个体的12个重新捕获).
  • 调查的地点根据自然特征被分为七个部分,以评估环境影响.

主要成果:

  • 估计的AST群体大小为40.79 ± 9.75个体 (0.663 ± 0.158只/ha).
  • 大约35.4-85.2%的估计人口在研究期间被标记.
  • 在各个区域中,AST的分布有很大差异,91%的捕获发生在植被海岸线和水道2中.

结论:

  • 这项研究为AST种群评估和保护提供了必要的基线数据.
  • 这些发现强调了植被海岸线和AST特定水道的重要性.
  • 有信息的保护策略是必要的,以应对阿穆尔软海的减少.