| 要旨トップ | 目次 | 日本生態学会第64回全国大会 (2017年3月、東京) 講演要旨
ESJ64 Abstract


一般講演(ポスター発表) P2-F-221  (Poster presentation)

The influence of time since introduction on the demography of invasive species and the consequences for management

*横溝裕行(National Institute for Environmental Studies), 高田壮則(Hokkaido University), 深谷肇一(The Institute of Statistical Mathematics), John Lambrinos(Oregon State University)

Several processes likely act to change the demographic rates of introduced species over time, and this changing demography could influence the optimal management of invasive populations. Optimal management strategies should be derived based on the demography. However, we have a poor understanding of the degree to which the demography of introduced species changes following initial introduction. We used published matrix population models of introduced plant populations to test how population growth rate and elasticity change with time since introduction. We did not find a significant relationship between population growth rate and time since introduction. However, elasticity to stasis increased while elasticity to growth decreased with time since introduction. Broadly, as time since introduction progressed the elasticities of the introduced plant populations became more similar to those that have been reported for native species. These results suggest that the optimal management strategy should be derived incorporating elasticity through time, especially when the time scope of management is long or the available demographic data were obtained in the past.


日本生態学会