Satellite patches, patch expansion, and doubling time as decision metrics for invasion control: Pennisetum ciliare expansion in southwestern Arizona
AffiliationUniv Arizona, Sch Nat Resources & Environm
MetadataShow full item record
PublisherCAMBRIDGE UNIV PRESS
CitationWeston, J., McClaran, M., Whittle, R., Black, C., & Fehmi, J. (2019). Satellite patches, patch expansion, and doubling time as decision metrics for invasion control: Pennisetum ciliare expansion in southwestern Arizona. Invasive Plant Science and Management, 12(1), 36-42. doi:10.1017/inp.2019.3
Rights© Weed Science Society of America, 2019
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
AbstractEssential variables to consider for an efficient control strategy for invasive plants include dispersion pattern (i.e., satellite or invasion front) and patch expansion rate. These variables were demonstrated for buffelgrass [Pennisetum ciliare (L.) Link], a C-4 perennial grass introduced from Africa, which has invaded broadly around the world. The study site was along a roadway in southern Arizona (USA). The P. ciliare plant distributions show the pattern of clumping associated with the satellite (nascent foci) colonization pattern (average nearest neighbor test, z-score -47.2, P <0.01). The distance between patches ranged from 0.743 to 12.8 km, with an average distance between patches of 5.6 km. Median patch expansion rate was 271% over the 3-yr monitoring period versus 136% found in other studies of established P. ciliare patches. Targeting P. ciliare satellite patches as a control strategy may exponentially reduce the areal doubling time, while targeting the largest patches may have less effect on the invasion speed.
Note6 month embargo; published online: 1 May 2019
VersionFinal accepted manuscript
SponsorsU.S. Air Force's 56th Range Management Office at Luke Air Force Base; Arizona Agricultural Experimental Station; Harry Wayne Springfield Endowment Scholarship