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Fluorescently Labeled Bacteria as a Tracer to Reveal Novel Pathways of Organic Carbon Flow in Aquatic Ecosystems
Published on: September 13, 2019
El pastoreo bacteriano por las algas planctónicas del lago
Resumen
Las especies de algas de los lagos ingieren bacterias a un ritmo comparable al de los microflagelados marinos. Ciertas algas, como el Dinobryon, son importantes consumidores de bacterias en los ecosistemas acuáticos.
Área de la Ciencia:
- Ecología acuática ecología acuática.
- Microbiología Microbiología.
- Limología Limología.
Sus antecedentes:
- Las bacterias son un componente clave de las redes alimenticias acuáticas.
- Las algas generalmente se consideran productores primarios, pero algunas pueden consumir otros organismos.
- El papel de las algas en el consumo de bacterias dentro de los ecosistemas de agua dulce no se entiende completamente.
Objetivo del estudio:
- Para investigar las capacidades de ingestión bacteriana de las especies comunes de algas de los lagos.
- Para comparar las tasas de ingestión bacteriana de algas con las de otros microorganismos acuáticos.
- Evaluar el impacto general de algas específicas en las poblaciones bacterianas en el agua de los lagos.
Principales métodos:
- Cultivo de seis especies comunes de algas de los lagos.
- Cuantificación de las tasas de ingestión bacteriana por las algas.
- Comparación de las tasas de eliminación de bacterias por las algas frente al zooplancton (crustáceos, rotiferos, ciliados).
Principales resultados:
- Se confirmó que seis especies comunes de algas de los lagos ingieren bacterias.
- Las tasas de ingestión de algas observadas fueron similares en magnitud a las de los microflagelados marinos.
- Una biomasa significativa de las especies Dinobryon eliminó las bacterias de manera más efectiva que una combinación de crustáceos, rotiferos y ciliados.
Conclusiones:
- Ciertas especies de algas de los lagos son capaces de un consumo significativo de bacterias.
- Las algas, particularmente Dinobryon, pueden desempeñar un papel sustancial en la regulación de las poblaciones bacterianas en entornos de agua dulce.
- Este hallazgo pone de relieve un vínculo trófico previamente subestimado en los ecosistemas lacustres.
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