Range expansion and potential distribution of the invasive grass Bromus tectorum in southern South America on the base of herbarium records
We reconstructed the invasion history and modelled the potential distribution of the invasive grass Bromus tectorum in southern South America. On the base of herbarium data, we described two aspects of B.tectorum's range expansion over time: area of occupancy and extent of occurrence. A maximum...
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2013
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01401963_v97_n_p230_Biganzoli http://hdl.handle.net/20.500.12110/paper_01401963_v97_n_p230_Biganzoli |
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paper:paper_01401963_v97_n_p230_Biganzoli2023-06-08T15:11:05Z Range expansion and potential distribution of the invasive grass Bromus tectorum in southern South America on the base of herbarium records Area of occupancy Arid ecosystem Exotic grass Extent of occurrence Habitat distribution model Patagonia arid environment biological invasion dispersal ecological modeling grass herbarium invasive species population distribution precipitation (climatology) range expansion Patagonia We reconstructed the invasion history and modelled the potential distribution of the invasive grass Bromus tectorum in southern South America. On the base of herbarium data, we described two aspects of B.tectorum's range expansion over time: area of occupancy and extent of occurrence. A maximum entropy model was used to identify both climatic variables associated with B.tectorum's current distribution and potentially invasible areas. The area-of-occupancy curve showed a steady increase of the occupied area since the first collection in 1937, with no obvious asymptote. However, the extent-of-occurrence curve indicated that range expansion was not homogeneous through time, but faster between 1965 and 1980. Most invasible areas were arid and semiarid with markedly Mediterranean precipitation regime. Within this susceptible region, there were large areas containing only a few known records of B.tectorum. Our results indicate that B. tectorum has successfully expanded over much of southern South America. In addition, there seems to be room for further local invasion (i.e. an increase of its area of occupancy) over large susceptible areas within the invaded region. Overall, our results confirm the suitability of southern South America's arid environments to B.tectorum invasion, and stress the importance of long-distance dispersal in accelerating its expansion across the region. © 2013 Elsevier Ltd. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01401963_v97_n_p230_Biganzoli http://hdl.handle.net/20.500.12110/paper_01401963_v97_n_p230_Biganzoli |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Area of occupancy Arid ecosystem Exotic grass Extent of occurrence Habitat distribution model Patagonia arid environment biological invasion dispersal ecological modeling grass herbarium invasive species population distribution precipitation (climatology) range expansion Patagonia |
| spellingShingle |
Area of occupancy Arid ecosystem Exotic grass Extent of occurrence Habitat distribution model Patagonia arid environment biological invasion dispersal ecological modeling grass herbarium invasive species population distribution precipitation (climatology) range expansion Patagonia Range expansion and potential distribution of the invasive grass Bromus tectorum in southern South America on the base of herbarium records |
| topic_facet |
Area of occupancy Arid ecosystem Exotic grass Extent of occurrence Habitat distribution model Patagonia arid environment biological invasion dispersal ecological modeling grass herbarium invasive species population distribution precipitation (climatology) range expansion Patagonia |
| description |
We reconstructed the invasion history and modelled the potential distribution of the invasive grass Bromus tectorum in southern South America. On the base of herbarium data, we described two aspects of B.tectorum's range expansion over time: area of occupancy and extent of occurrence. A maximum entropy model was used to identify both climatic variables associated with B.tectorum's current distribution and potentially invasible areas. The area-of-occupancy curve showed a steady increase of the occupied area since the first collection in 1937, with no obvious asymptote. However, the extent-of-occurrence curve indicated that range expansion was not homogeneous through time, but faster between 1965 and 1980. Most invasible areas were arid and semiarid with markedly Mediterranean precipitation regime. Within this susceptible region, there were large areas containing only a few known records of B.tectorum. Our results indicate that B. tectorum has successfully expanded over much of southern South America. In addition, there seems to be room for further local invasion (i.e. an increase of its area of occupancy) over large susceptible areas within the invaded region. Overall, our results confirm the suitability of southern South America's arid environments to B.tectorum invasion, and stress the importance of long-distance dispersal in accelerating its expansion across the region. © 2013 Elsevier Ltd. |
| title |
Range expansion and potential distribution of the invasive grass Bromus tectorum in southern South America on the base of herbarium records |
| title_short |
Range expansion and potential distribution of the invasive grass Bromus tectorum in southern South America on the base of herbarium records |
| title_full |
Range expansion and potential distribution of the invasive grass Bromus tectorum in southern South America on the base of herbarium records |
| title_fullStr |
Range expansion and potential distribution of the invasive grass Bromus tectorum in southern South America on the base of herbarium records |
| title_full_unstemmed |
Range expansion and potential distribution of the invasive grass Bromus tectorum in southern South America on the base of herbarium records |
| title_sort |
range expansion and potential distribution of the invasive grass bromus tectorum in southern south america on the base of herbarium records |
| publishDate |
2013 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01401963_v97_n_p230_Biganzoli http://hdl.handle.net/20.500.12110/paper_01401963_v97_n_p230_Biganzoli |
| _version_ |
1768544680005337088 |