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Exportación de biomasa de algas del derretimiento del hielo marino del Ártico
Antje Boetius1, Sebastian Albrecht, Karel Bakker
1Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, 27515 Bremerhaven, Germany. antje.boetius@awi.de
Science (New York, N.Y.)
|February 16, 2013
Resumen
En el Ártico, la biomasa de algas de hielo se hundió en el fondo del mar profundo durante un mínimo récord de hielo marino en verano. Este hallazgo ayuda a evaluar los impactos del cambio climático en los ecosistemas del Ártico.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Biología Marina Biología Marina.
- Ciencias del clima Ciencias del clima Ciencias del clima
Sus antecedentes:
- La producción primaria bajo el hielo en el Ártico está limitada por la estacionalidad, la cubierta de hielo y la estratificación de la columna de agua que limita la disponibilidad de nutrientes.
- La extensión del hielo marino del Ártico alcanzó un mínimo récord en el verano de 2012, un período crítico para el crecimiento de algas bajo el hielo.
Objetivo del estudio:
- Investigar la deposición de la biomasa de algas de hielo en el fondo del mar profundo en las cuencas del Ártico central durante un período de mínimo récord de hielo marino.
- Contribuir con datos para evaluar los efectos del cambio climático en la productividad, la biodiversidad y la función ecológica del Ártico.
Principales métodos:
- El buque de investigación Polarstern realizó un crucero en las cuencas centro-orientales del Ártico (82°89°N, 30°130°E) en el verano de 2012.
- Se recogieron medidas de deposición de biomasa de algas de hielo en el fondo del mar profundo.
Principales resultados:
- Se observó una deposición generalizada de biomasa de algas de hielo en las cuencas del Ártico central.
- La tasa promedio de deposición se midió en 9 gramos de carbono por metro cuadrado.
Conclusiones:
- El estudio destaca una exportación significativa de la producción primaria al mar profundo en el Ártico central.
- Los hallazgos proporcionan datos cruciales para comprender las consecuencias ecológicas de la disminución del hielo marino del Ártico debido al cambio climático.
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