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Videos de Conceptos Relacionados

What is Biodiversity?01:19

What is Biodiversity?

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.
Keystone Species01:39

Keystone Species

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 pivotal role in the...
Ecological Niches02:02

Ecological Niches

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.Multiple species cannot occupy the exact same niche within their habitat. If the niches of two or more species overlap to a large extent, the competitive exclusion principle dictates that one species will outcompete the other, forcing it to...
Ecological Disturbance02:26

Ecological Disturbance

An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.Ecological disturbances can be caused by an event as small as the trampling of underbrush to an incident as wide-ranging as a forest...
Symbiosis00:58

Symbiosis

Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
Introduction to Microbial Ecology01:28

Introduction to Microbial Ecology

Microbial ecology examines the complex web of interactions and diversity among microorganisms within various ecosystems. This field seeks to understand how microbial populations adapt to and influence their environments and how these interactions shape broader ecological processes. Microbes are integral to ecosystem function, participating in nutrient cycling, energy flow, and the maintenance of environmental homeostasis.An ecosystem represents a dynamic interaction between living organisms...

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Video Experimental Relacionado

Updated: Jul 12, 2026

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ECOLOGÍA: ¿Cuándo importan muchas especies?

J Kaiser

    Science (New York, N.Y.)
    |September 5, 2007
    PubMed
    Resumen

    Más especies de hierba en parcelas experimentales a menudo conducen a un aumento de la productividad. Sin embargo, los científicos debaten si esto demuestra que la biodiversidad es esencial para la salud del ecosistema.

    Área de la Ciencia:

    • Ecología Ecología Ecología.
    • Ciencias ambientales Ciencias ambientales.

    Sus antecedentes:

    • La evidencia experimental sugiere una correlación positiva entre la riqueza de especies y la productividad del ecosistema en las comunidades de pastizales.
    • Existe un debate científico sobre las implicaciones de esta correlación para el papel crítico de la biodiversidad en el mantenimiento de la salud del ecosistema.

    Objetivo del estudio:

    • Explorar la relación entre la diversidad de especies vegetales y la productividad del ecosistema en entornos de pastizales experimentales.
    • Para abordar la discusión científica en curso sobre si las ganancias de productividad observadas en diversas parcelas significan la esencialidad de la biodiversidad para el funcionamiento del ecosistema.

    Principales métodos:

    • Utilizó parcelas experimentales de hierbas para manipular y observar la riqueza de especies.

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  • Productividad del ecosistema medida bajo diferentes niveles de biodiversidad.

    • Principales resultados:

    • Las parcelas experimentales con mayor riqueza de especies demostraron una mayor productividad.
    • El aumento observado en la productividad fue consistente en diferentes configuraciones experimentales.

    Conclusiones:

    • Si bien una mayor biodiversidad en los pastizales está relacionada con un aumento de la productividad, su esencialidad para la salud general del ecosistema sigue siendo un tema de debate científico.
    • Se necesita más investigación para establecer definitivamente el vínculo causal entre la biodiversidad y las funciones críticas del ecosistema.