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Fuentes de fósforo para las malezas acuáticas: ¿agua o sedimentos?
Science (New York, N.Y.)
|February 29, 1980
Resumen
Las plantas acuáticas absorben principalmente el fósforo de los sedimentos, incluso en aguas ricas en nutrientes. Esta investigación destaca los macrófitos sumergidos como actores clave en el ciclo de los nutrientes, actuando como bombas de nutrientes en los ecosistemas acuáticos.
Área de la Ciencia:
- Botánica acuática La botánica acuática es la botánica acuática.
- Limología Limología.
- El ciclo de los nutrientes.
Sus antecedentes:
- Los macrófitos acuáticos son cruciales para los ecosistemas de los lagos.
- La disponibilidad de fósforo a menudo limita el crecimiento de las plantas acuáticas.
- La fuente primaria de fósforo para los macrófitos sumergidos sigue siendo objeto de debate.
Objetivo del estudio:
- Determinar la principal fuente de fósforo para los macrófitos acuáticos sumergidos en entornos naturales.
- Para cuantificar la contribución de los sedimentos a la absorción de fósforo de los macrófitos en diferentes estados tróficos.
Principales métodos:
- Se realizaron experimentos in situ con nueve especies comunes de macrófitos acuáticos.
- Las plantas se cultivaron en bahías mesotróficas, ligeramente eutróficas e hipertróficas.
- La absorción de fósforo de los sedimentos se midió durante el crecimiento de las plantas.
Principales resultados:
- Todas las especies de macrófitos estudiadas obtuvieron todo su fósforo de sedimentos en condiciones mesotróficas y levemente eutróficas.
- Bajo condiciones hipertróficas, los sedimentos aún suministran un promedio del 72% del fósforo total absorbido por los macrófitos.
- Esto demuestra una dependencia consistente y significativa del fósforo en los sedimentos.
Conclusiones:
- Los macrófitos acuáticos sumergidos dependen abrumadoramente de los sedimentos para su suministro de fósforo en entornos naturales.
- Estas plantas funcionan como importantes bombas de nutrientes, transfiriendo el fósforo de los sedimentos a la columna de agua abierta.
- Comprender esta dinámica es fundamental para gestionar los niveles de nutrientes y la eutrofización en los ecosistemas acuáticos.
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