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Dispersión global de las especies de eucariotas microbianos que viven en libertad
1Centre for Ecology and Hydrology (Windermere), Ferry House, Ambleside, Cumbria LA22 0LP, UK. bjf@ceh.ac.uk
Science (New York, N.Y.)
|May 11, 2002
Resumen
La dispersión microbiana es ubicua, lo que significa que las barreras geográficas rara vez limitan el movimiento de las especies. Esto sugiere un bajo número de especies globales y suficiente diversidad local para las funciones del ecosistema.
Área de la Ciencia:
- Ecología microbiana ecología microbiana.
- Ciencia de la biodiversidad ciencia de la biodiversidad.
- La dinámica de los ecosistemas.
Sus antecedentes:
- Las poblaciones microbianas exhiben un gran número de individuos.
- Las barreras geográficas rara vez impiden la dispersión microbiana.
- Esto desafía las perspectivas ecológicas tradicionales sobre la biodiversidad.
Objetivo del estudio:
- Proponer un marco alternativo para comprender la biodiversidad microbiana.
- Reevaluar la escala y la dinámica de la distribución de las especies microbianas.
- Conectar la diversidad microbiana con el funcionamiento del ecosistema.
Principales métodos:
- Análisis conceptual de los patrones de dispersión microbiana.
- Revisión de la literatura existente sobre ecología microbiana y biogeografía.
- Síntesis de datos sobre la abundancia y distribución microbiana.
Principales resultados:
- La dispersión microbiana es efectivamente no restringida por la geografía, denominada dispersión ubicua.
- La riqueza mundial de especies microbianas es probablemente más baja de lo que se suponía anteriormente.
- La riqueza de especies locales es siempre adecuada para mantener las funciones del ecosistema.
Conclusiones:
- Se necesita un cambio de paradigma para comprender la biodiversidad microbiana.
- El enfoque debe estar en la riqueza local y la redundancia funcional.
- La diversidad global puede ser menos crítica para la estabilidad del ecosistema que la diversidad local.
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