Evidence of a planktonic food web response to changes in nutrient input dynamics in the Mar Menor coastal lagoon, Spain

Nutrient input dynamics in the Mar Menor coastal lagoon has recently changed as a consequence of changes in agricultural practises. An interannual comparison of the environmental variables and the planktonic biomass size-spectra was performed between 1988 and 1997. While nitrate concentration was low in 1988, the values in 1997 increased considerably. Since 1995, two alloctonous jellyfish species (Rhyzostoma pulmo and Cotylorhiza tuberculata) occurred in large numbers in summer time and reached peak abundance in summer of 1997. The size-spectra analysis comparison revealed that, in spite of changes in nutrient input that stimulated the growth of larger phytoplankton cells, there were no significant differences in the spectra slope which followed a similar seasonal trend in both years. However, the plankton biovolume considered under the size range compared (between 2 and 1000 mum diameter) was, paradoxically, always lower in 1997. Given that there were higher nutrient levels in 1997, this finding suggest a strong top-down control mechanism of size structure. Gut contents of jellyfishes showed their preference for large diatoms, tintinnids, veliger larvae and copepods, corroborating that size structure in these assemblages can be subject to top-down control. The implication of these results is that the feeding activities of large gelatinous zooplankton (jellyfishes) may play an important role controlling the consequences of eutrophication within the Mar Menor coastal lagoon.

Datos y Recursos

Cite como

Perez-Ruzafa A. Gilabert J. Gutierrez J.M. Fernandez A.I. Marcos C. y Sabah S. Evidence of a planktonic food web response to changes in nutrient input dynamics in the Mar Menor coastal lagoon Spain. Springer Nature, 2002. https://doi.org/10.1023/A:1020343510060

Clipboard Icon
Recuperado: 21 Jan 2025 06:05:13
RIS BibTeX

Metadatos
Descargar
DCAT-AP/NTI-RISP

Información básica
Tipo de recurso Artículo
Fecha de creación 05-11-2024
Fecha de última modificación 21-01-2025
Mostrar histórico de cambios
Identificador de los metadatos 34924575-747a-5019-8213-54c655ae4dc6
Idioma de los metadatos Español
Temáticas (NTI-RISP)
Categoría del conjunto de alto valor (HVD) Observación de la Tierra y medio ambiente
Categoría temática ISO 19115 biota
URI de palabras clave
Información bibliográfica
Nombre del autor Perez-Ruzafa, A., Gilabert, J., Gutierrez, J.M., Fernandez, A.I., Marcos, C. y Sabah, S.
Nombre del editor Springer Nature
Identificador alternativo DOI: 10.1023/A:1020343510060
Identificador del autor
Email del autor angelpr@um.es
Web del autor
Procedencia
Declaración de linaje
Perfil de Metadatos
Notas sobre la versión
Versión