Diversity and structure of bird and mammal communities in the Semiarid Chaco Region: response to agricultural practices and landscape alterations
Tesis para obtener el grado de Doctor of Philosophy (PhD) en Life Sciences, del Imperial College London, en 2015
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| Format: | info:ar-repo/semantics/tesis doctoral biblioteca |
| Language: | eng |
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Imperial College London, Gran Bretaña
2015-03
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| Subjects: | Pájaros, Mamíferos, Agricultura, Paisaje, Conservación de la Naturaleza, Medio Ambiente, Birds, Mammals, Agriculture, Landscape, Nature Conservation, Environment, Región Chaco Semiárido, Argentina, |
| Online Access: | http://hdl.handle.net/20.500.12123/6204 https://spiral.imperial.ac.uk/handle/10044/1/38615 |
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oai:localhost:20.500.12123-62042021-08-18T17:53:46Z Diversity and structure of bird and mammal communities in the Semiarid Chaco Region: response to agricultural practices and landscape alterations Decarre, Julieta Carbone, Chris (supervisor) Banks-Leite, Cristina (supervisora) Pájaros Mamíferos Agricultura Paisaje Conservación de la Naturaleza Medio Ambiente Birds Mammals Agriculture Landscape Nature Conservation Environment Región Chaco Semiárido, Argentina Tesis para obtener el grado de Doctor of Philosophy (PhD) en Life Sciences, del Imperial College London, en 2015 The conversion of land from natural environments to human-managed areas has been particularly pronounced in the semiarid Chaco Region. In this context, it is critical to understand the impacts that these major changes have on species diversity. The specific aims of this thesis were to understand: i) how the different human-modified environments influenced the distribution of the bird assemblages in the current agricultural matrix; ii) which local and landscape scale characteristics best explained species richness and relative abundance of mammals; and iii) what is the relationship between biodiversity and profit for both taxa, and given this relationship, to what extent can conservation and production objectives be simultaneously achieved. Bird and mammal community data was gathered in seven different habitats of an agricultural matrix and inside a National Park. Bird species richness and abundance were extremely low in highly modified environments (agriculture plots), but increased significantly in intermediate, or low modified habitats (silvopasture plots, forest outside and inside the National Park, respectively). Richness and capture frequency of mammals increased gradually across the gradient of habitat modification, from low numbers in agricultural habitats to a maximum in National Park forests. Changes in species composition with production intensification differed between birds and mammals. The bird communities were similar for low- and intermediate-intensity farming, with constant number of species, abundance and community integrity. However, further intensification led to an abrupt decline, defining a clear threshold. Mammal species richness was maintained in low-yield farming, relative abundance declined with increasing production, favoured by a wildlife-friendly farming approach. In contrast to birds, mammal community integrity decreased exponentially with increased levels of intensification, showing that only protected or well-preserved forests can support some habitat-restricted species. The results suggest that a combined strategy is the best option to achieve conservation and production targets that include both taxa. Instituto de Recursos Biológicos Fil: Decarre, Julieta. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina 2019-10-25T11:43:56Z 2019-10-25T11:43:56Z 2015-03 info:ar-repo/semantics/tesis doctoral info:eu-repo/semantics/doctoralThesis info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/6204 https://spiral.imperial.ac.uk/handle/10044/1/38615 eng info:eu-repo/semantics/openAccess application/pdf Imperial College London, Gran Bretaña |
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Biblioteca Central del INTA Argentina |
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eng |
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Pájaros Mamíferos Agricultura Paisaje Conservación de la Naturaleza Medio Ambiente Birds Mammals Agriculture Landscape Nature Conservation Environment Región Chaco Semiárido, Argentina Pájaros Mamíferos Agricultura Paisaje Conservación de la Naturaleza Medio Ambiente Birds Mammals Agriculture Landscape Nature Conservation Environment Región Chaco Semiárido, Argentina |
| spellingShingle |
Pájaros Mamíferos Agricultura Paisaje Conservación de la Naturaleza Medio Ambiente Birds Mammals Agriculture Landscape Nature Conservation Environment Región Chaco Semiárido, Argentina Pájaros Mamíferos Agricultura Paisaje Conservación de la Naturaleza Medio Ambiente Birds Mammals Agriculture Landscape Nature Conservation Environment Región Chaco Semiárido, Argentina Decarre, Julieta Diversity and structure of bird and mammal communities in the Semiarid Chaco Region: response to agricultural practices and landscape alterations |
| description |
Tesis para obtener el grado de Doctor of Philosophy (PhD) en Life Sciences, del Imperial College London, en 2015 |
| author2 |
Carbone, Chris (supervisor) |
| author_facet |
Carbone, Chris (supervisor) Decarre, Julieta |
| format |
info:ar-repo/semantics/tesis doctoral |
| topic_facet |
Pájaros Mamíferos Agricultura Paisaje Conservación de la Naturaleza Medio Ambiente Birds Mammals Agriculture Landscape Nature Conservation Environment Región Chaco Semiárido, Argentina |
| author |
Decarre, Julieta |
| author_sort |
Decarre, Julieta |
| title |
Diversity and structure of bird and mammal communities in the Semiarid Chaco Region: response to agricultural practices and landscape alterations |
| title_short |
Diversity and structure of bird and mammal communities in the Semiarid Chaco Region: response to agricultural practices and landscape alterations |
| title_full |
Diversity and structure of bird and mammal communities in the Semiarid Chaco Region: response to agricultural practices and landscape alterations |
| title_fullStr |
Diversity and structure of bird and mammal communities in the Semiarid Chaco Region: response to agricultural practices and landscape alterations |
| title_full_unstemmed |
Diversity and structure of bird and mammal communities in the Semiarid Chaco Region: response to agricultural practices and landscape alterations |
| title_sort |
diversity and structure of bird and mammal communities in the semiarid chaco region: response to agricultural practices and landscape alterations |
| publisher |
Imperial College London, Gran Bretaña |
| publishDate |
2015-03 |
| url |
http://hdl.handle.net/20.500.12123/6204 https://spiral.imperial.ac.uk/handle/10044/1/38615 |
| work_keys_str_mv |
AT decarrejulieta diversityandstructureofbirdandmammalcommunitiesinthesemiaridchacoregionresponsetoagriculturalpracticesandlandscapealterations |
| _version_ |
1756007616459309057 |