Search research articles

ACERCA DE JoVE

Visión General Liderazgo Blog Centro de Ayuda JoVE

AUTORES

Proceso de Publicación Consejo Editorial Alcance y Políticas Revisión por Pares Preguntas Frecuentes Enviar

BIBLIOTECARIOS

Testimonios Suscripciones Acceso Recursos Consejo Asesor de Bibliotecas Preguntas Frecuentes

INVESTIGACIÓN

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archivo

EDUCACIÓN

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Centro de Recursos para Profesores Sitio de Profesores

Términos y Condiciones de Uso

Política de Privacidad

Videos de Conceptos Relacionados

Population Growth

Population Growth

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.However, realistic environmental conditions limit the number of...

Threats to Biodiversity

Threats to Biodiversity

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...

What is Population Genetics?

What is Population Genetics?

A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.While some alleles of a given gene might be observed commonly, other variants...

Conservation of Declining Populations

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.

Generation Time

Generation Time

Bacterial generation time, the period required for a bacterial population to double during its exponential growth phase, serves as a critical measure of microbial growth dynamics under optimal conditions. This parameter varies significantly across bacterial species and can be influenced by factors such as temperature, pH, and the availability of nutrients. For example, Escherichia coli can achieve a generation time of approximately 20 minutes, while Mycobacterium tuberculosis exhibits a much...

Exponential Equations for Modeling Growth

Exponential Equations for Modeling Growth

Exponential models are essential for describing rapid, multiplicative changes in natural systems, such as population growth. When a population doubles at regular intervals, the process can be modeled using a suitable base. For instance, a bacterial culture that doubles every three hours follows the model n(t)=n0⋅2t/3, where n(t) is the population at the time t.A more general model uses the natural base e, especially for continuous growth. This takes the form n(t)=n0⋅ert, where r is the relative...

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por

Same author

Kinetic control of mammalian transcription elongation.

Nature structural & molecular biology·2025

Same author

Coefficients in Taylor's law increase with the time scale of water clarity measurements in a global suite of lakes.

Ecology letters·2024

Same author

Nanomechanics of wild-type and mutant dimers of the inner-ear tip-link protein protocadherin 15.

Proceedings of the National Academy of Sciences of the United States of America·2024

Same author

Quantifying how much host, pathogen, and other factors affect human protective adaptive immune responses.

Frontiers in immunology·2024

Same author

Taylor's law for exponentially growing local populations linked by migration.

Theoretical population biology·2023

Same author

Nanomechanics of wild-type and mutant dimers of the tip-link protein protocadherin 15.

bioRxiv : the preprint server for biology·2023

Search research articles

Video Experimental Relacionado

Updated: Jul 9, 2026

Freezing Human ES Cells

Freezing Human ES Cells

Published on: October 12, 2006

Población humana: el próximo medio siglo.

¹Rockefeller University and Columbia University, 1230 New York Avenue, Box 20, New York, NY 10021, USA. cohen@rockefeller.edu

Science (New York, N.Y.)

|November 15, 2003

Resumen

Se prevé que el crecimiento de la población mundial alcance los 2-4 mil millones para 2050, con cambios significativos hacia la urbanización y el envejecimiento de la población. Las elecciones humanas y los factores sociales darán cada vez más forma a estas tendencias demográficas.

Área de la Ciencia:

Demografía La demografía es la demografía.
Estudios de la población Estudios de la población
Sociología Sociología Sociología.

Sus antecedentes:

El siglo XXI se enfrenta a una dinámica demográfica sin precedentes, que incluye crecimiento, envejecimiento y urbanización.
Comprender estos cambios es crucial para la planificación global y la gestión de recursos.

Objetivo del estudio:

Para esbozar los principales cambios proyectados en la población humana para 2050.
Identificar las principales incertidumbres y factores que influyen en las tendencias demográficas.

Principales métodos:

Análisis de las proyecciones de población mundial.
Revisión de las influencias socioeconómicas, ambientales y culturales en la demografía.

Más Videos Relacionados

Population Replacement Strategies for Controlling Vector Populations and the Use of Wolbachia pipientis for Genetic Drive

Population Replacement Strategies for Controlling Vector Populations and the Use of Wolbachia pipientis for Genetic Drive

Published on: July 4, 2007

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Published on: July 4, 2007

Videos de Experimentos Relacionados

Last Updated: Jul 9, 2026

Freezing Human ES Cells

Freezing Human ES Cells

Published on: October 12, 2006

Population Replacement Strategies for Controlling Vector Populations and the Use of Wolbachia pipientis for Genetic Drive

Population Replacement Strategies for Controlling Vector Populations and the Use of Wolbachia pipientis for Genetic Drive

Published on: July 4, 2007

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Published on: July 4, 2007

Principales resultados:

Se proyecta un aumento de la población de 2 a 4 mil millones para 2050.
Aumento de la urbanización, especialmente en las regiones menos desarrolladas.
Un envejecimiento de la población mundial, con tasas de crecimiento decrecientes en las áreas desarrolladas.

Conclusiones:

La migración internacional y las estructuras familiares son las principales incertidumbres demográficas.
Los factores económicos, ambientales y culturales tienen un impacto significativo en las tendencias de la población.
Las elecciones humanas individuales y colectivas tendrán profundas consecuencias demográficas.