ESTUDIO DEL EFECTO DEL FUEGO SOBRE LA DIVERSIDAD DE DORILÁIMIDOS Y MONÓNQUIDOS EDÁFICOS (NEMATODA: DORYLAIMIDA Y MONONCHIDA) EN LA DEHESA DEL GUADIANA, PROVINCIA DE JAÉN
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2016-10-28
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Jaén: Universidad de Jaén
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[ES]En este trabajo se realiza un estudio sobre el efecto del fuego en la nematofauna (filo Nematoda) edáfica asociada a un pinar en la cuenca del Guadiana Menor, provincia de Jaén. Se han analizado un total de diez muestras, cinco recolectadas en un área quemada, y otras cinco en un área próxima no quemada. Se han identificado hasta nivel de especie un total de 646 individuos de 41 especies, 27 géneros y 11 familias, pertenecientes a los órdenes Dorylaimida y Mononchida. Se presentan datos de diversidad (riqueza de especies, géneros y familias por muestra) y de distribución: número de individuos de cada especie (abundancia) en cada muestra, y datos de frecuencia (número de muestras en que está presente cada especie). Los resultados obtenidos indican valores de diversidad y abundancia siempre menores en el área quemada, si bien las diferencias observadas son en general no significativas, debido seguramente al escaso número de muestras analizadas. La composición y estructura de la taxocenosis ha experimentado cambios cualitativos y cuantitativos tras el incendio puesto que las especies más representativas (más abundantes y/o más frecuentes) difieren de modo importante en ambas áreas. Dos especies Chitwoodiellus parafuscus y Crassolabium ettersbergense mostraron diferencias significativas en su distribución en el área quemada y no quemada, de modo que pueden ser buenas indicadoras de la calidad del suelo.
[EN]This contribution presents a study of the effects of fire on the soil nematode fauna (phylum Nematoda) associated with a pine forest in the Guadiana Menor basin, province of Jaén. Ten soil samples have been analyzed, five collected in a burned area, and other five in a close, not burned area. A total of 646 specimens have been identified up to species level, and they belong to 41 species, 27 genera and 11 families of the orders Mononchida and Dorylaimida. Given data concern diversity (species, genera and families richness per soil sample) and distribution: number of specimens of each species per soil sample (abundance) and number of soil samples in which each species is present (frequency). The results show lower values of both abundance and frequency in not burned area, but the observed differences are not significant in general, probably due to the low number of soil samples examined. Two species Chitwoodiellus parafuscus and Crassolabium ettersbergense showed, however, significant differences in their distribution in both areas, so they can be good bio-indicator of the quality of the soil. The composition and structure of the nematode community have suffered relevant changes after burning as the most representatives species (those more abundant and/or more frequent) significantly differ in both areas.
[EN]This contribution presents a study of the effects of fire on the soil nematode fauna (phylum Nematoda) associated with a pine forest in the Guadiana Menor basin, province of Jaén. Ten soil samples have been analyzed, five collected in a burned area, and other five in a close, not burned area. A total of 646 specimens have been identified up to species level, and they belong to 41 species, 27 genera and 11 families of the orders Mononchida and Dorylaimida. Given data concern diversity (species, genera and families richness per soil sample) and distribution: number of specimens of each species per soil sample (abundance) and number of soil samples in which each species is present (frequency). The results show lower values of both abundance and frequency in not burned area, but the observed differences are not significant in general, probably due to the low number of soil samples examined. Two species Chitwoodiellus parafuscus and Crassolabium ettersbergense showed, however, significant differences in their distribution in both areas, so they can be good bio-indicator of the quality of the soil. The composition and structure of the nematode community have suffered relevant changes after burning as the most representatives species (those more abundant and/or more frequent) significantly differ in both areas.