NDLI: Estimation of the potential speed of range expansion of an introduced species: characteristics and applicability of the gamma model

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Estimation of the potential speed of range expansion of an introduced species: characteristics and applicability of the gamma model

Content Provider	Springer Nature Link
Author	Yamamura, Kohji Moriya, Seiichi Tanaka, Koichi Shimizu, Toru
Copyright Year	2006
Abstract	The potential speed at which the range of an introduced species expands in its optimal environment can be predicted by using the gamma model proposed by Yamamura (Popul Ecol 46:87–101, 2004). In this paper we first clarify the difference between the gamma model and Einstein’s Brownian motion model. We then apply the model to the ragweed beetle, Ophraella communa LeSage that rapidly expanded its distribution in Japan after it was first found in 1996. The parameters of the model are estimated by conducting a field experiment. The species’ net reproductive rate is examined in the laboratory. By combining these estimates, we estimate the potential speed of range expansion to be 82 km per generation and 329 km per year, while the observed speed is estimated to be 77 km per year, the observed speed being considerably slower than the potential speed. This discrepancy may be due to the low reproductive rate caused by mortality in the actual field. The applicability of the gamma model to the econometric data is also briefly discussed.
Starting Page	51
Ending Page	62
Page Count	12
File Format	PDF
ISSN	14383896
Journal	Population Ecology
Volume Number	49
Issue Number	1
e-ISSN	1438390X
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-11-21
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biological invasions Brownian motion Ophraella communa Dispersal Forestry Behavioural Sciences Evolutionary Biology Plant Sciences Zoology Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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Alpine dandelions originated in the native and introduced range differ in their responses to environmental constraints

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