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Respuestas de la comunidad de fitoplancton a los cambios ambientales en el Mar Amarillo
Yejin Kim1, Hyo-Keun Jang2, Seok-Hyun Youn2
1Department of Oceanography and Marine Research Institute, Pusan National University, Busan, 46241, South Korea; Ecological Risk Research Department, Korea Institute of Ocean Science & Technology, Geoje, 53201, South Korea.
Marine environmental research
|August 26, 2025
Resumen
Las comunidades de fitoplancton del Mar Amarillo están cambiando debido al calentamiento y los cambios de nutrientes. Las diatomeas pueden disminuir, reemplazadas por cianobacterias y primnesiofitas, lo que afecta a los ecosistemas marinos.
Área de la Ciencia:
- Ecología marina
- La oceanografía
- Investigación sobre el fitoplancton
Sus antecedentes:
- El Mar Amarillo (YS) es un ecosistema marino altamente productivo que se enfrenta a cambios ambientales.
- La dinámica del fitoplancton es crucial para comprender las redes alimentarias marinas y los ciclos biogeoquímicos.
Objetivo del estudio:
- Investigar la estructura de la comunidad de fitoplancton y su respuesta a los factores ambientales en el Mar Amarillo.
- Identificar los factores ambientales clave que influyen en la composición del fitoplancton.
Principales métodos:
- Cromatografía líquida de alto rendimiento (HPLC) para el análisis de pigmentos.
- Se emplearon análisis de clúster, análisis de redundancia (RDA), análisis de partición de varianza (VPA) y modelos aditivos generalizados (GAM).
- Análisis de muestras recogidas entre 2018 y 2020.
Principales resultados:
- Se identificaron cuatro comunidades distintas de fitoplancton.
- Las diatomeas dominaron en condiciones frías y ricas en nutrientes; las cianobacterias y las primnesiofitas prosperaron en aguas más cálidas y pobres en nutrientes.
- La temperatura y la disponibilidad de nutrientes se identificaron como los principales factores de la estructura de la comunidad.
Conclusiones:
- Se predice que el cambio climático y la contaminación por nutrientes alterarán la composición del fitoplancton YS, favoreciendo a los grupos no diatómicos.
- Los cambios en las comunidades de fitoplancton podrían afectar significativamente la red alimentaria, la productividad y los procesos biogeoquímicos del Mar Amarillo.
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