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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Autores principales:	Biganzoli, F., Larsen, C., Rolhauser, A.G.
Formato:	JOUR
Lenguaje:	English
Materias:	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
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_01401963_v97_n_p230_Biganzoli
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_01401963_v97_n_p230_Biganzoli
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spelling	todo:paper_01401963_v97_n_p230_Biganzoli2023-10-03T14:58:21Z Range expansion and potential distribution of the invasive grass Bromus tectorum in southern South America on the base of herbarium records Biganzoli, F. Larsen, C. Rolhauser, A.G. 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. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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)
language	English
orig_language_str_mv	English
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 Biganzoli, F. Larsen, C. Rolhauser, A.G. 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.
format	JOUR
author	Biganzoli, F. Larsen, C. Rolhauser, A.G.
author_facet	Biganzoli, F. Larsen, C. Rolhauser, A.G.
author_sort	Biganzoli, F.
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
url	http://hdl.handle.net/20.500.12110/paper_01401963_v97_n_p230_Biganzoli
work_keys_str_mv	AT biganzolif rangeexpansionandpotentialdistributionoftheinvasivegrassbromustectoruminsouthernsouthamericaonthebaseofherbariumrecords AT larsenc rangeexpansionandpotentialdistributionoftheinvasivegrassbromustectoruminsouthernsouthamericaonthebaseofherbariumrecords AT rolhauserag rangeexpansionandpotentialdistributionoftheinvasivegrassbromustectoruminsouthernsouthamericaonthebaseofherbariumrecords
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Range expansion and potential distribution of the invasive grass Bromus tectorum in southern South America on the base of herbarium records

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