Video Experimental Relacionado
Updated: May 6, 2026
07:24
In Situ Hybridization Techniques for Paraffin-Embedded Adult Coral Samples
Published on: August 31, 2018
6.8K
La biodiversidad de mamíferos en Madagascar está controlada por las corrientes oceánicas
1Department of Earth Sciences, University of Hong Kong, Pokfulam Road, Hong Kong, China.
Nature
|January 22, 2010
Resumen
El estudio apoya la "hipótesis del sorteo", que muestra que las corrientes antiguas facilitaron el rafting de mamíferos a Madagascar. Esto desafía las teorías de puente terrestre y revalida el rafting como un mecanismo clave de dispersión del Cenozoico.
Área de la Ciencia:
- La biogeografía es la biogeografía.
- Biología evolutiva Biología evolutiva.
- La paleoceanografía es la paleoceanografía.
Sus antecedentes:
- La fauna única de Madagascar se explica por la "hipótesis del sorteo", que propone que los antepasados de los mamíferos fueron arrastrados desde África.
- La validez de esta hipótesis se debate, con algunos estudios que favorecen los puentes de tierra sobre el rafting.
- Investigaciones anteriores cuestionaron la viabilidad del rafting debido a las inconsistentes corrientes oceánicas.
Videos de Conceptos Relacionados
01:17What is an Ecosystem?
38.7K
Overview
38.7K
01:19What is Biodiversity?
28.1K
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.
28.1K
01:50Threats to Biodiversity
21.9K
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...
21.9K
02:39Gene Flow
30.8K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
30.8K
01:27Diversity of Protists IV
2.1K
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
2.1K
01:30Marine Microbial Ecology
74
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
74