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Biogeografía de comunidades bacterianas de crioconita a través de continentes
Qianqian Ge1,2,3, Zhiyuan Chen1,2,3, Yeteng Xu1,2,3
1Yulong Snow Station of Cryosphere and Sustainable Development, State Key Laboratory of Cryospheric Science and Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China.
Microorganisms
|January 28, 2026
Resumen
Las comunidades microbianas en la crioconita de glaciares muestran distintos patrones biogeográficos influenciados por la latitud y el desarrollo humano. Los procesos estocásticos, como la limitación de la dispersión, dominan el ensamblaje de la comunidad microbiana a través de los continentes, especialmente a escalas espaciales más grandes.
Área de la Ciencia:
- Ecología microbiana
- Biogeografía
- Glaciología
Sus antecedentes:
- Los patrones de distribución microbiana son clave para comprender la función del ecosistema y los impactos del cambio global.
- Los agujeros de crioconita ofrecen un entorno único y cerrado ideal para estudiar la biogeografía microbiana y el ciclo biogeoquímico.
- La comprensión de las comunidades microbianas en la crioconita es crucial para predecir la evolución de los ecosistemas de la criosfera.
Objetivo del estudio:
- Analizar las comunidades bacterianas en la crioconita de glaciares a escala transcontinental.
- Elucidar la distribución biogeográfica y los procesos de ensamblaje de comunidades de bacterias de crioconita.
- Investigar la influencia de factores geográficos, climáticos y antropogénicos en las comunidades microbianas.
Principales métodos:
- Análisis de comunidades bacterianas en muestras de crioconita de glaciares.
- Análisis estadístico de la composición de especies, la diversidad y la diversidad beta.
- Evaluación de los mecanismos de ensamblaje de comunidades, incluidos los procesos estocásticos y deterministas.
Principales resultados:
- Las comunidades bacterianas de crioconita estaban dominadas por Proteobacteria, Cyanobacteria, Bacteroidota y Actinobacteriota.
- La diversidad bacteriana estuvo influenciada por la latitud y el Índice de Desarrollo Humano (IDH), mostrando una relación en forma de joroba con la latitud.
- La diversidad beta siguió un patrón de decaimiento por distancia, y los procesos estocásticos, particularmente la limitación de la dispersión, predominaron en el ensamblaje de la comunidad, especialmente a escalas espaciales más grandes.
Conclusiones:
- Los factores geográficos y antropogénicos dan forma conjuntamente a la diversidad bacteriana en la crioconita.
- Los procesos estocásticos son los principales impulsores del ensamblaje de comunidades microbianas en la crioconita, con efectos dependientes de la escala.
- Las influencias antropogénicas son críticas para predecir el futuro de los ecosistemas de la criosfera bajo el cambio global.
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