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Escala espacial de la diversidad de los eucariotas microbianos
Jessica L Green1, Andrew J Holmes, Mark Westoby
1Key Centre for Biodiversity and Bioresources, Department of Biological Sciences, Macquarie University, New South Wales 2109, Australia. jgreen@ucmerced.edu
Nature
|December 14, 2004
Resumen
La diversificación espacial microbiana muestra una baja rotación a través de grandes distancias y hábitats. A pesar de la gran diversidad local, los microorganismos exhiben una diversidad regional moderada, lo que afecta a la complejidad del ecosistema.
Área de la Ciencia:
- Ecología Ecología Ecología.
- Microbiología Microbiología.
- La investigación de la biodiversidad en la investigación de la biodiversidad.
Sus antecedentes:
- Comprender los patrones de distribución espacial es clave para la complejidad de los ecosistemas y la regulación de la biodiversidad.
- Los microorganismos juegan un papel crítico en la biogeoquímica y el funcionamiento del ecosistema, sin embargo, su diversificación espacial sigue siendo poco estudiada.
Objetivo del estudio:
- Para estimar cuantitativamente la rotación de las comunidades microbianas a escala local y regional.
- Para analizar la relación taxa-área para los eucariotas microbianos terrestres.
- Proyectar las relaciones de área de los taxones a escalas continentales utilizando patrones de rotación.
Principales métodos:
- Se utilizó el conjunto de datos de diversidad microbiana espacialmente explícito más grande (> 10 ^ 6 pares de muestras).
- Las tasas de rotación calculadas de la comunidad microbiana a través de diferentes distancias geográficas y hábitats.
- Examinó la relación taxa-área, comparando los eucariotas microbianos terrestres con los sistemas acuáticos.
Principales resultados:
- Las tasas de rotación microbiana fueron bajas a través de grandes distancias geográficas y similares dentro de hábitats distintos.
- Las tasas de rotación no aumentaron entre los diferentes tipos de vegetación.
- La relación taxa-área para los eucariotas microbianos terrestres fue relativamente plana (z = 0,074), consistente con los hábitats acuáticos, lo que sugiere una diversidad regional moderada a pesar de la alta diversidad local.
Conclusiones:
- Los patrones de diversificación espacial microbiana indican una diversidad regional moderada.
- Los patrones de rotación pueden extrapolarse para proyectar las relaciones de área-taxa en escalas continentales.
- La investigación futura debe centrarse en la recopilación de datos de disimilaridad de taxones intercontinentales para refinar estas proyecciones.
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