Biblioteca Digital de VanguardiaContribution of Amynthas gracilis (Megascolecidae) and Octolasion cyaneum (Lumbricidae) to soil physical stability : a mesocosm experiment
The contribution of the introduced species Amynthas gracilis (Kinberg, 1867) and Octolasion cyaneum (Savigny, 1826) to the physical stability of the soil was evaluated in a mesocosm experiment. Pore formation and stable aggregates were measured; as well as changes in bulk density, porosity, and soil...
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias
2016
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| Acceso en línea: | http://bdigital.uncu.edu.ar/8449 |
| _version_ | 1782341863817084928 |
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| author | Falco, Liliana Coviella, Carlos |
| author_facet | Falco, Liliana Coviella, Carlos |
| author_sort | Falco, Liliana |
| collection | Repositorio |
| description | The contribution of the introduced species Amynthas gracilis (Kinberg, 1867) and
Octolasion cyaneum (Savigny, 1826) to the physical stability of the soil was evaluated in
a mesocosm experiment. Pore formation and stable aggregates were measured; as well
as changes in bulk density, porosity, and soil moisture. Mesocosm pots were organized
into three treatments: 1- soil + Amynthas gracilis, 2- soil + Octolasion cyaneum and 3- soil
(control containers). The experiment ran for 13 weeks and it was conducted in controlled
conditions in a greenhouse. At the end of the experiment both treatments with earthworms
had higher number of pores and stable aggregates at the two considered depths
(0 - 5 cm and 5 - 10 cm). The presence of both earthworm species favors the formation
of a significantly higher proportion of stable aggregates larger than 5 mm (60%), when
compared to the control without worms. These structures helped maintaining bulk
density and porosity and improved water circulation. The results show that when
compared to the control, both treatments had a lower loss of pore space, lower bulk
density, and higher soil moisture, all attributable to earthworm presence. It is concluded
that, despite both being introduced species, in intensive agricultural systems, A. gracilis
and O. cyaneum can contribute to the maintenance of soil physical stability thus helping
to preserve the sustainability of agro-ecosystems, even if native species became rare or
locally extinct. |
| format | Artículo |
| id | uncu-8449 |
| institution | Biblioteca Digital - UNCUYO |
| language | Inglés |
| publishDate | 2016 |
| publisher | Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias
|
| record_format | ojs |
| spelling | uncu-84492017-02-15T16:15:09Z Contribution of Amynthas gracilis (Megascolecidae) and Octolasion cyaneum (Lumbricidae) to soil physical stability : a mesocosm experiment Contribución de Amynthas gracilis (Megascolecidae) y de Octolasion cyaneum (Lumbricidae) a la estabilidad física del suelo : una experiencia en mesocosmos Falco, Liliana Coviella, Carlos Lombriz de tierra Amynthas gracilis Octolasion cyaneum Propiedades físicas del suelo Agroecosistemas Pores Soil physical stability Aggregate stability Introduced species Earthworms The contribution of the introduced species Amynthas gracilis (Kinberg, 1867) and Octolasion cyaneum (Savigny, 1826) to the physical stability of the soil was evaluated in a mesocosm experiment. Pore formation and stable aggregates were measured; as well as changes in bulk density, porosity, and soil moisture. Mesocosm pots were organized into three treatments: 1- soil + Amynthas gracilis, 2- soil + Octolasion cyaneum and 3- soil (control containers). The experiment ran for 13 weeks and it was conducted in controlled conditions in a greenhouse. At the end of the experiment both treatments with earthworms had higher number of pores and stable aggregates at the two considered depths (0 - 5 cm and 5 - 10 cm). The presence of both earthworm species favors the formation of a significantly higher proportion of stable aggregates larger than 5 mm (60%), when compared to the control without worms. These structures helped maintaining bulk density and porosity and improved water circulation. The results show that when compared to the control, both treatments had a lower loss of pore space, lower bulk density, and higher soil moisture, all attributable to earthworm presence. It is concluded that, despite both being introduced species, in intensive agricultural systems, A. gracilis and O. cyaneum can contribute to the maintenance of soil physical stability thus helping to preserve the sustainability of agro-ecosystems, even if native species became rare or locally extinct. En un experimento de mesocosmos se evaluó la contribución a la estabilidad física del suelo de las especies introducidas Amynthas gracilis (Kinberg, 1867) y Octolasion cyaneum (Savigni, 1826). Se midió la formación de poros y de agregados estables, así como cambios en la densidad aparente, porosidad y humedad del suelo. Los contenedores de los mesocosmos fueron organizados en tres tratamientos: 1- suelo + A. gracilis, 2. Soil + O. cyaneum, and 3. Soil (contenedores control). El experimento se realizó a lo largo de 13 semanas en condiciones controladas en invernáculo. Al final del experimento los tratamientos con ambas especies generaron poros y mostraron mayor proporción de agregados estables a las dos profundidades consideradas (0 - 5 cm y 5 - 10 cm). Ambas especies de lombrices facilitaron la generación de una proporción significativamente mayor de agregados mayores a 5 mm (60%), en comparación con los controles sin lombrices. Estas estructuras ayudaron a mantener la densidad aparente y la porosidad y mejoraron la circulación de agua. Los resultados muestran que, comparados con el control, ambos tratamientos tuvieron una menor pérdida de espacio de poros, menor densidad aparente y mayor humedad de suelo, todos atribuibles a la presencia de las lombrices. Se concluyó que, a pesar de ser ambas especies introducidas, en sistemas agrícolas intensivos A. gracilis y O. cyaneum pueden contribuir al mantenimiento de la estabilidad del suelo, ayudando así a preservar la sustentabilidad de los agroecosistemas, aun cuando las especies nativas puedan convertirse en raras o localmente extintas. Fil: Falco, Liliana. Universidad Nacional de Luján Fil: Coviella, Carlos. Universidad Nacional de Luján Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias 78 Revista de la Facultad de Ciencias Agrarias Vol. 48, no. 1 Revista de la Facultad de Ciencias Agrarias, Vol. 48, no. 1 2016-06-01 eng Inglés http://bdigital.uncu.edu.ar/8411 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar/ article info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias http://bdigital.uncu.edu.ar/8449 |
| spellingShingle | Lombriz de tierra Amynthas gracilis Octolasion cyaneum Propiedades físicas del suelo Agroecosistemas Pores Soil physical stability Aggregate stability Introduced species Earthworms Falco, Liliana Coviella, Carlos Contribution of Amynthas gracilis (Megascolecidae) and Octolasion cyaneum (Lumbricidae) to soil physical stability : a mesocosm experiment |
| title | Contribution of Amynthas gracilis (Megascolecidae) and Octolasion cyaneum (Lumbricidae) to soil physical stability
: a mesocosm experiment |
| title_full | Contribution of Amynthas gracilis (Megascolecidae) and Octolasion cyaneum (Lumbricidae) to soil physical stability
: a mesocosm experiment |
| title_fullStr | Contribution of Amynthas gracilis (Megascolecidae) and Octolasion cyaneum (Lumbricidae) to soil physical stability
: a mesocosm experiment |
| title_full_unstemmed | Contribution of Amynthas gracilis (Megascolecidae) and Octolasion cyaneum (Lumbricidae) to soil physical stability
: a mesocosm experiment |
| title_short | Contribution of Amynthas gracilis (Megascolecidae) and Octolasion cyaneum (Lumbricidae) to soil physical stability
: a mesocosm experiment |
| title_sort | contribution of amynthas gracilis (megascolecidae) and octolasion cyaneum (lumbricidae) to soil physical stability
: a mesocosm experiment |
| topic | Lombriz de tierra Amynthas gracilis Octolasion cyaneum Propiedades físicas del suelo Agroecosistemas Pores Soil physical stability Aggregate stability Introduced species Earthworms |
| url | http://bdigital.uncu.edu.ar/8449 |