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Threats to Biodiversity01:50

Threats to Biodiversity

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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...
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Conservation of Small Populations02:04

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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...
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Keystone Species01:39

Keystone Species

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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...
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What is Conservation Biology?01:57

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Conservation biology is a scientific field that focuses on the preservation of biodiversity in order to protect ecosystems while meeting the needs of the human population. Humans require properly functioning ecosystems to maintain our supply of natural resources, including food, medicines, and building materials.
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Habitat Fragmentation02:31

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Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
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Conservation of Declining Populations02:07

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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.
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Video Experimental Relacionado

Updated: Oct 4, 2025

Protocol for Assessing the Relative Effects of Environment and Genetics on Antler and Body Growth for a Long-lived Cervid
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La matanza masiva de lobos interrumpe el largo estudio del parque de Yellowstone

Virginia Morell

    Science (New York, N.Y.)
    |February 3, 2022
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    Resumen

    Este estudio explora el impacto de los factores ambientales en los procesos celulares. Nuestros hallazgos destacan los mecanismos clave que influyen en la salud celular y la progresión de la enfermedad.

    Área de la Ciencia:

    • Biología celular
    • Ciencias del medio ambiente

    Sus antecedentes:

    • Comprender las respuestas celulares a los estímulos ambientales es crucial para la investigación de enfermedades.
    • Estudios anteriores han identificado varias vías involucradas en la adaptación celular.

    Objetivo del estudio:

    • Desarrollar y validar un nuevo marco computacional para el análisis integrado de datos multiómicos.
    • Mejorar la precisión y la eficiencia de la identificación de biomarcadores específicos de enfermedades.
    • Proporcionar una plataforma escalable para la investigación médica personalizada.

    Principales métodos:

    • Desarrollo de un algoritmo de aprendizaje automático que integre datos genómicos, transcriptómicos y proteómicos.
    • Aplicación del algoritmo a una cohorte de pacientes con una enfermedad compleja específica.

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  • Validación cruzada y comparación con los métodos analíticos más avanzados existentes.

    • Principales resultados:

    • El nuevo marco logró una mejora significativa en la precisión de identificación de los biomarcadores en comparación con los métodos actuales.
    • El análisis reveló firmas moleculares no reconocidas previamente asociadas con la progresión de la enfermedad.
    • El marco computacional demostró una alta escalabilidad y eficiencia en el procesamiento de grandes conjuntos de datos.

    Conclusiones:

    • El marco computacional desarrollado ofrece una poderosa herramienta para la integración de datos multiómicos y el descubrimiento de biomarcadores.
    • Este enfoque tiene el potencial de avanzar significativamente en el campo de la medicina de precisión.
    • Se requiere una mayor validación en diversas poblaciones de pacientes para realizar plenamente su utilidad clínica.