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La dinámica trófica de los ecosistemas de abajo hacia arriba determina la producción de peces en el noreste del
Daniel M Ware1, Richard E Thomson
1Aquatic Ecosystem Associates, 3674 Planta Road, Nanaimo, BC V9T 1M2, Canada.
Science (New York, N.Y.)
|April 23, 2005
Resumen
Los ecosistemas marinos muestran un fuerte control de abajo hacia arriba, donde la disponibilidad de fitoplancton influye directamente en las poblaciones de zooplancton y peces. Este vínculo trófico es evidente a lo largo de la costa oeste de América del Norte, particularmente en regiones productivas como Washington y Columbia Británica.
Área de la Ciencia:
- Ecología marina Ecología marina.
- Pesca Ciencia Pesca Ciencia
- Oceanografía La oceanografía es la oceanografía.
Sus antecedentes:
- Los ecosistemas marinos exhiben complejas interacciones tróficas influenciadas tanto por los procesos de abajo hacia arriba como de arriba hacia abajo.
- Comprender estos controles es crucial para una gestión y conservación efectivas de la pesca.
Objetivo del estudio:
- Investigar la importancia relativa del control de abajo hacia arriba frente al de arriba hacia abajo en las interacciones tróficas marinas.
- Para correlacionar la producción primaria con el rendimiento pesquero a lo largo del margen continental del oeste de América del Norte.
Principales métodos:
- Utilizados datos anuales de capturas de peces.
- Empleó mediciones de clorofila derivadas de satélites (SeaWiFS).
- Se analizaron datos de zooplancton para regiones costeras específicas.
Principales resultados:
- Se identificaron variaciones significativas a lo largo de la costa en la producción primaria retenida.
- Se encontró una fuerte correlación entre la producción primaria y el rendimiento de los peces residentes.
- La productividad y el rendimiento pesquero más altos observados en Washington y el sur de la Columbia Británica.
- Se han confirmado fuertes vínculos tróficos de abajo hacia arriba desde el fitoplancton hasta los peces en áreas regionales.
Conclusiones:
- Las interacciones tróficas de los ecosistemas marinos están significativamente influenciadas por el control ascendente, impulsado por la producción primaria.
- La disponibilidad de fitoplancton es un determinante clave del rendimiento pesquero en las aguas costeras.
- Estos vínculos de abajo hacia arriba son detectables a escala regional, lo que informa sobre la gestión basada en el ecosistema.
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