Buffelgrass Expansion Rate and Dispersal Type on Recently Invaded Barry M. Goldwater Range of Southwestern Arizona
Land managers have struggled to develop successful control strategies to address buffelgrass invasion in the Sonoran Desert. Two important variables for control strategies are dispersal type and patch expansion rate (i.e. satellite or invasion front). We investigated these variables along a highway...
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ndltd-arizona.edu-oai-arizona.openrepository.com-10150-6133862016-06-18T03:00:59Z Buffelgrass Expansion Rate and Dispersal Type on Recently Invaded Barry M. Goldwater Range of Southwestern Arizona Damery-Weston, Jaron Fehmi, Jeffrey S. McClaran, Mitch Whittle, Richard Invasive Sonoran Desert Spread Expansion Natural Resources Buffelgrass Land managers have struggled to develop successful control strategies to address buffelgrass invasion in the Sonoran Desert. Two important variables for control strategies are dispersal type and patch expansion rate (i.e. satellite or invasion front). We investigated these variables along a highway invaded within the last 10 years located south of Gila Bend, Arizona, USA. Dispersal type was calculated by documenting the location of each buffelgrass individual along a 16 km stretch of highway and using an average nearest neighbor analysis in ArcMap 10.2.2. Thirty-six patches were monitored for four years along a 56 km stretch of highway 85 by documenting the outlines of each patch. Dispersal type registered as satellite dispersal (i.e. clustered on the Nearest Neighbor test), z-score = -47.2, p < 0.01. Patch expansion exhibited a median doubling time of 0.81 years. The results of the dispersal type analysis represent an opportunity to enhance control strategies, by targeting buffelgrass satellites and theoretically reducing patch expansion exponentially. The patch expansion rates for buffelgrass were faster than found in past research, giving land managers a clearer understanding buffelgrass patch expansion behavior. 2016 text Electronic Thesis http://hdl.handle.net/10150/613386 http://arizona.openrepository.com/arizona/handle/10150/613386 en_US Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. The University of Arizona. |
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en_US |
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Invasive Sonoran Desert Spread Expansion Natural Resources Buffelgrass |
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Invasive Sonoran Desert Spread Expansion Natural Resources Buffelgrass Damery-Weston, Jaron Buffelgrass Expansion Rate and Dispersal Type on Recently Invaded Barry M. Goldwater Range of Southwestern Arizona |
description |
Land managers have struggled to develop successful control strategies to address buffelgrass invasion in the Sonoran Desert. Two important variables for control strategies are dispersal type and patch expansion rate (i.e. satellite or invasion front). We investigated these variables along a highway invaded within the last 10 years located south of Gila Bend, Arizona, USA. Dispersal type was calculated by documenting the location of each buffelgrass individual along a 16 km stretch of highway and using an average nearest neighbor analysis in ArcMap 10.2.2. Thirty-six patches were monitored for four years along a 56 km stretch of highway 85 by documenting the outlines of each patch. Dispersal type registered as satellite dispersal (i.e. clustered on the Nearest Neighbor test), z-score = -47.2, p < 0.01. Patch expansion exhibited a median doubling time of 0.81 years. The results of the dispersal type analysis represent an opportunity to enhance control strategies, by targeting buffelgrass satellites and theoretically reducing patch expansion exponentially. The patch expansion rates for buffelgrass were faster than found in past research, giving land managers a clearer understanding buffelgrass patch expansion behavior. |
author2 |
Fehmi, Jeffrey S. |
author_facet |
Fehmi, Jeffrey S. Damery-Weston, Jaron |
author |
Damery-Weston, Jaron |
author_sort |
Damery-Weston, Jaron |
title |
Buffelgrass Expansion Rate and Dispersal Type on Recently Invaded Barry M. Goldwater Range of Southwestern Arizona |
title_short |
Buffelgrass Expansion Rate and Dispersal Type on Recently Invaded Barry M. Goldwater Range of Southwestern Arizona |
title_full |
Buffelgrass Expansion Rate and Dispersal Type on Recently Invaded Barry M. Goldwater Range of Southwestern Arizona |
title_fullStr |
Buffelgrass Expansion Rate and Dispersal Type on Recently Invaded Barry M. Goldwater Range of Southwestern Arizona |
title_full_unstemmed |
Buffelgrass Expansion Rate and Dispersal Type on Recently Invaded Barry M. Goldwater Range of Southwestern Arizona |
title_sort |
buffelgrass expansion rate and dispersal type on recently invaded barry m. goldwater range of southwestern arizona |
publisher |
The University of Arizona. |
publishDate |
2016 |
url |
http://hdl.handle.net/10150/613386 http://arizona.openrepository.com/arizona/handle/10150/613386 |
work_keys_str_mv |
AT damerywestonjaron buffelgrassexpansionrateanddispersaltypeonrecentlyinvadedbarrymgoldwaterrangeofsouthwesternarizona |
_version_ |
1718309110951182336 |