Video Experimental Relacionado
Updated: Dec 11, 2025
14:44
Field Collection and Laboratory Maintenance of Canopy-Forming Giant Kelp to Facilitate Restoration
Published on: June 7, 2024
2.1K
La navegación paleoindia, las tecnologías marítimas y la búsqueda de alimento costero en las Islas del Canal de
Jon M Erlandson1, Torben C Rick, Todd J Braje
1Museum of Natural and Cultural History, University of Oregon, Eugene, OR 97403, USA. jerland@uoregon.edu
Science (New York, N.Y.)
|March 10, 2011
Resumen
Los paleoindios en las Islas del Canal de California utilizaron abundantes recursos marinos, como lo demuestran las herramientas y los restos faunísticos en los sitios paleocoastal. Estos hallazgos revelan sofisticadas economías marítimas y estrategias de colonización temprana de las islas.
Área de la Ciencia:
- Arqueología Arqueología.
- Estudios paleoecológicos y medioambientales.
- La historia marítima es la historia marítima.
Sus antecedentes:
- Presencia paleoindio en América del Norte.
- Adaptación humana temprana a los entornos costeros.
- Desafíos de la colonización de las islas.
Objetivo del estudio:
- Para investigar las estrategias de subsistencia de los paleoindios en las Islas del Canal de California.
- Para analizar los conjuntos de fauna y artefactos de los sitios paleocoastal.
- Comprender el alcance del uso de los recursos marítimos y las capacidades marítimas.
Principales métodos:
- Excavación arqueológica y análisis de restos faunísticos.
- Análisis de artefactos líticos, incluyendo puntos de proyectil y bifaces.
- La datación por radiocarbono de capas arqueológicas.
Principales resultados:
- Identificación de diversos restos de fauna marina y acuática (aves, mamíferos marinos, peces).
- Descubrimiento de numerosos puntos de proyectil con tallo y medias lunas.
- Evidencia de sofisticada tecnología lítica, incluyendo herramientas bifaciales.
Conclusiones:
- Los paleoindios de las Islas del Canal poseían una economía marítima diversificada.
- Los sitios proporcionan una fuerte evidencia de la navegación temprana y la colonización de las islas.
- Las similitudes tecnológicas vinculan estos sitios con la tradición de los lagos pluviales occidentales.
Videos de Conceptos Relacionados
01:27Diversity of Archaea III
237
Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like...
237
01:24Diversity of Archaea II
335
Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
335
01:23Surface Appendages of Archaea
445
Archaeal surface appendages are highly specialized structures essential for environmental adaptation, encompassing roles in adhesion, biofilm formation, and motility. Among these appendages, pili and archaella stand out for their distinct morphologies and functionalities, enabling archaea to thrive in diverse and often extreme environments.Pili: Adhesion and Biofilm FormationPili are filamentous structures assembled from pilin protein subunits, primarily contributing to adhesion and biofilm...
445
01:30Diversity of Archaea I
385
Archaea, a domain of single-celled microorganisms, are classified into five major phyla based on genetic and biochemical characteristics: Euryarchaeota, Crenarchaeota, Thaumarchaeota, Korarchaeota, and Nanoarchaeota. Among these, the phylum Euryarchaeota is notable for its remarkable diversity in morphology, metabolism, and ecological adaptations.Morphological and Metabolic DiversityMembers of Euryarchaeota exhibit a variety of cellular shapes, including rods and cocci. Their metabolic pathways...
385
02:56The Fossil Record
26.8K
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
26.8K
00:48Optimal Foraging
13.1K
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.
13.1K