Invasion of Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) in landscapes of the Amazonian deforestation arc
Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) is an invasive endogeic earthworm that has colonized most land transformed by human activities in the humid tropics. When installed, populations can change soil physical properties, biogeochemical processes and microbial communities. The aim of...
| Autor principal: | Marichal, Raphael |
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| Outros Autores: | Martinez, Alex Feijoo, Praxedes, Catarina, Ruiz, Dario, Carvajal, Andres F., Oszwald, Johan, Hurtado, Maria del Pilar, Brown, George G., Grimaldi, Michel, Desjardins, Thierry, Sarrazin, Max, Decaëns, Thibaud, Velasquez, Elena, Lavelle, Patrick |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Elsevier
2010
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| Acesso em linha: |
http://repositorio.museu-goeldi.br/handle/mgoeldi/169 |
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ir-mgoeldi-169 |
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ir-mgoeldi-1692019-07-17T17:52:00Z Invasion of Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) in landscapes of the Amazonian deforestation arc Marichal, Raphael Martinez, Alex Feijoo Praxedes, Catarina Ruiz, Dario Carvajal, Andres F. Oszwald, Johan Hurtado, Maria del Pilar Brown, George G. Grimaldi, Michel Desjardins, Thierry Sarrazin, Max Decaëns, Thibaud Velasquez, Elena Lavelle, Patrick Invasive earthworms Land transformation Amazônia Pontoscolex corethrurus Ecologia animal Minhocas Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) is an invasive endogeic earthworm that has colonized most land transformed by human activities in the humid tropics. When installed, populations can change soil physical properties, biogeochemical processes and microbial communities. The aim of this study was to determine whether P. corethrurus establishment is a result of (1) a competitive exclusion of native earthworm species or (2) the exploitation of a new niche created by anthropogenic disturbance that native earthworm species cannot use. We tested these hypotheses by doing a survey of earthworm communities in 270 sites that represented the diversity of land use systems encountered in two contrasted regions of the Amazonian arc of deforestation located in Brazil and Colombia respectively. When present in forests, P. corethrurus had no negative effect on the native species communities that had similar (epigeic species) or even higher densities (endogeic species) in the presence of the invasive species. These results suggest the absence of competitive exclusion. The first two axes of a PCA multivariate analysis of communities represented the densities of native species (axis 1) and P. corethrurus (axis 2) respectively. This suggests that respective densities of the two groups respond to different conditions and that their variations are independent. The density of P. corethrurus co-varied with soil N content and pH in Colombian sites while the densities of other species did not. Our results thus suggest that this invasive species, unlike native species, is able to feed and develop in environments where litter resources are decreased while soils have been enriched in C and nutrients by deforestation and burning. We discuss the reasons why some primary forests in Central America have large populations of P. corethrurus. 2010-10-16T21:46:48Z 2010-10-16T21:46:48Z 2010-10-15 artigo MARICHAL, Raphael et al. Invasion of Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) in landscapes of the Amazonian deforestation arc. Applied Soil Ecology, 2010. doi:10.1016/j.apsoil.2010.09.001 0929-1393 http://repositorio.museu-goeldi.br/handle/mgoeldi/169 en application/pdf Elsevier |
| institution |
Repositório Institucional - Museu Paraense Emílio Goeldi |
| collection |
RepositorioEmilioGoeldi |
| language |
English |
| topic |
Invasive earthworms Land transformation Amazônia Pontoscolex corethrurus Ecologia animal Minhocas |
| spellingShingle |
Invasive earthworms Land transformation Amazônia Pontoscolex corethrurus Ecologia animal Minhocas Marichal, Raphael Invasion of Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) in landscapes of the Amazonian deforestation arc |
| topic_facet |
Invasive earthworms Land transformation Amazônia Pontoscolex corethrurus Ecologia animal Minhocas |
| description |
Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) is an invasive endogeic earthworm that has colonized most land transformed by human activities in the humid tropics. When installed, populations can change soil physical properties, biogeochemical processes and microbial communities. The aim of this study was to determine whether P. corethrurus establishment is a result of (1) a competitive exclusion of native earthworm species or (2) the exploitation of a new niche created by anthropogenic disturbance that native earthworm species cannot use. We tested these hypotheses by doing a survey of earthworm communities in 270 sites that represented the diversity of land use systems encountered in two contrasted regions of the Amazonian arc of deforestation located in Brazil and Colombia respectively. When present in forests, P. corethrurus had no negative effect on the native species communities that had similar (epigeic species) or even higher densities (endogeic species) in the presence of the invasive species. These results suggest the absence of competitive exclusion.
The first two axes of a PCA multivariate analysis of communities represented the densities of native species (axis 1) and P. corethrurus (axis 2) respectively. This suggests that respective densities of the two groups respond to different conditions and that their variations are independent. The density of P. corethrurus co-varied with soil N content and pH in Colombian sites while the densities of other species did not. Our results thus suggest that this invasive species, unlike native species, is able to feed and develop in environments where litter resources are decreased while soils have been enriched in C and nutrients by deforestation and burning. We discuss the reasons why some primary forests in Central America have large populations of P. corethrurus. |
| format |
Artigo |
| author |
Marichal, Raphael |
| author2 |
Martinez, Alex Feijoo Praxedes, Catarina Ruiz, Dario Carvajal, Andres F. Oszwald, Johan Hurtado, Maria del Pilar Brown, George G. Grimaldi, Michel Desjardins, Thierry Sarrazin, Max Decaëns, Thibaud Velasquez, Elena Lavelle, Patrick |
| author2Str |
Martinez, Alex Feijoo Praxedes, Catarina Ruiz, Dario Carvajal, Andres F. Oszwald, Johan Hurtado, Maria del Pilar Brown, George G. Grimaldi, Michel Desjardins, Thierry Sarrazin, Max Decaëns, Thibaud Velasquez, Elena Lavelle, Patrick |
| title |
Invasion of Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) in landscapes of the Amazonian deforestation arc |
| title_short |
Invasion of Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) in landscapes of the Amazonian deforestation arc |
| title_full |
Invasion of Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) in landscapes of the Amazonian deforestation arc |
| title_fullStr |
Invasion of Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) in landscapes of the Amazonian deforestation arc |
| title_full_unstemmed |
Invasion of Pontoscolex corethrurus (Glossoscolecidae, Oligochaeta) in landscapes of the Amazonian deforestation arc |
| title_sort |
invasion of pontoscolex corethrurus (glossoscolecidae, oligochaeta) in landscapes of the amazonian deforestation arc |
| publisher |
Elsevier |
| publishDate |
2010 |
| url |
http://repositorio.museu-goeldi.br/handle/mgoeldi/169 |
| _version_ |
1787135640010227712 |
| score |
11.653393 |