Density dependence in demography and dispersal generates fluctuating invasion speeds
Sullivan, Lauren L.
Miller, Tom E. X.
Neubert, Michael G.
Shaw, Allison K.
MetadataShow full item record
Mitigating the spread of invasive species remains difficult—substantial variability in invasion speed is increasingly well-documented, but the sources of this variability are poorly understood. We report a mechanism for invasion speed variability. The combined action of density dependence in demography and dispersal can cause invasions to fluctuate, even in constant environments. Speed fluctuations occur through creation of a pushed invasion wave that moves forward not from small populations at the leading edge but instead, from larger, more established populations that “jump” forward past the previous invasion front. Variability in strength of the push generates fluctuating invasion speeds. Conditions giving rise to fluctuations are widely documented in nature, suggesting that an important source of invasion variability may be overlooked.
Author Posting. © The Author(s), 2017. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Proceedings of the National Academy of Sciences of the United States of America 114 (2017): 5053-5058, doi:10.1073/pnas.1618744114.
Suggested CitationPreprint: Sullivan, Lauren L., Li, Bingtuan, Miller, Tom E. X., Neubert, Michael G., Shaw, Allison K., "Density dependence in demography and dispersal generates fluctuating invasion speeds", 2017-04, https://doi.org/10.1073/pnas.1618744114, https://hdl.handle.net/1912/8962
Showing items related by title, author, creator and subject.
Shyu, Esther; Pardini, Eleanor A.; Knight, Tiffany M.; Caswell, Hal (Ecological Society of America, 2013-12)The population effects of harvest depend on complex interactions between density dependence, seasonality, stage structure, and management timing. Here we present a periodic nonlinear matrix population model that incorporates ...
Fragment reattachment, reproductive status, and health indicators of the invasive colonial tunicate Didemnum vexillum with implications for dispersal Morris, James A.; Carman, Mary R. (2012-04)The invasive colonial tunicate Didemnum vexillum is now widespread in coastal and offshore waters of New England, USA. D. vexillum can inflict ecological and economic damage through biofouling and habitat modification. ...
Miller, Tom E. X.; Shaw, Allison K.; Inouye, Brian D.; Neubert, Michael G. (University of Chicago, 2011-04-07)Population models that combine demography and dispersal are important tools for forecasting the spatial spread of biological invasions. Current models describe the dynamics of only one sex (typically females). Such models ...