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

Modeling with Differential Equations01:25

Modeling with Differential Equations

255
Population dynamics can be described mathematically by considering the population size P(t) as a function of time. The rate of change of the population is then represented by the derivative of P(t). A simple assumption is that the rate of growth is proportional to the size of the population itself. This leads to an exponential growth model, where the population increases rapidly without bound. While this is a useful first approximation, it does not reflect realistic long-term...
255
Population Growth00:57

Population Growth

29.5K
Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.
29.5K
Optimal Foraging00:48

Optimal Foraging

14.2K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
14.2K
Mechanistic Models: Compartment Models in Individual and Population Analysis01:23

Mechanistic Models: Compartment Models in Individual and Population Analysis

335
Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...
335
Ecological Niches02:02

Ecological Niches

27.4K
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
27.4K
Growth Models with Integration: Problem Solving01:27

Growth Models with Integration: Problem Solving

149
In population modeling, integration provides a systematic way to determine accumulated quantities from known rates of change. One such application arises in ecology, where the total weight of a fish population in a body of water is referred to as its biomass. When the rate of growth of this biomass is known as a function of time, calculus can be used to determine the total biomass at a future date.Growth Rate and Biomass FunctionLet the growth rate of the fish population be represented by a...
149

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

Integrating infection intensity and aggregation into the dynamics of pathogens with within-host replication.

The Journal of animal ecology·2026
Same author

A parasite-inclusive food web for the California rocky intertidal zone.

Scientific data·2026
Same author

Stressor interactions affect myxozoan abundance in a 42-year dataset from the Pearl River, Louisiana, USA.

Parasitology·2026
Same author

Generalized dynamics of cross-feeding bacteria.

Journal of the Royal Society, Interface·2026
Same author

Dynamic mean and variance of microparasite load give key insights into population dynamics and underlying mechanisms.

Journal of the Royal Society, Interface·2026
Same author

Functional motifs in food webs and networks.

Proceedings of the National Academy of Sciences of the United States of America·2026

相关实验视频

Updated: Apr 5, 2026

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
07:41

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Published on: July 30, 2019

8.1K

环境学理论 一个一般的消费者资源人口模型

Kevin D Lafferty1, Giulio DeLeo2, Cheryl J Briggs3

  • 1Western Ecological Research Center, U.S. Geological Survey, Marine Science Institute, University of California-Santa Barbara, Santa Barbara, CA, USA. klafferty@usgs.gov.

Science (New York, N.Y.)
|August 22, 2015
PubMed
概括

这项研究为消费者与资源的互动提供了一个一般模型,统一了捕食者与猎物和寄生虫与宿主之间的动态. 它揭示了普遍的和功能反应,并澄清了生态建模中的假设.

更多相关视频

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
10:20

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter

Published on: March 12, 2013

14.1K
Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
20:36

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Published on: July 4, 2007

9.3K

相关实验视频

Last Updated: Apr 5, 2026

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
07:41

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Published on: July 30, 2019

8.1K
Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
10:20

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter

Published on: March 12, 2013

14.1K
Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
20:36

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Published on: July 4, 2007

9.3K

科学领域:

  • 生态学
  • 数学生物学
  • 理论生态学

背景情况:

  • 食物网的动态是由捕食者-猎物,寄生虫-宿主和草食植物的相互作用驱动的.
  • 现有模型通常使用不同的状态来描述消费者活动和资源反应.

研究的目的:

  • 为消费者与资源的互动制定一个一般的数学框架.
  • 统一和比较不同的生态模型.
  • 导出消费者成功的条件并分析模型假设.

主要方法:

  • 定义的一般消费者活动状态 (查询,攻击,消费) 和资源响应状态 (易受,暴露,摄入,耐药).
  • 确定了11种消费者策略的一般模型,将它们数学分为捕食者,寄生虫和微型捕食者.
  • 消费者成功的衍生条件,包括充足的功能反应.

主要成果:

  • 为分析和比较消费者资源模型建立了一个统一的框架.
  • 一个普遍的和功能反应是消费者成功的条件.
  • 该框架有助于创建具有透明假设和数学谱系的简单模型.

结论:

  • 一般模型为了解各种生态相互作用提供了强大的工具.
  • 从这个总体框架中推导出经典模型揭示了潜在的假设和局限性.
  • 这种方法提高了生态建模研究的清晰度和可比性.