Document Type

Article

Publication Date

3-2010

Publication Title

Biological Invasions

Disciplines

Biology | Weed Science

Abstract

Microstegium vimineum (Japanese stiltgrass) is a non-native weed whose rapid invasion threatens native diversity and regeneration in forests. Using data from a 4 year experiment tracking new invasions in different habitats, we developed a spatial model of patch growth, using maximum likelihood techniques to estimate dispersal and population growth parameters. The patches expanded surprisingly slowly: in the final year, the majority of new seedlings were still within 1 m of the original patch. The influence of habitat was not as strong as anticipated, although patches created in roadside and wet meadow habitats tended to expand more rapidly and had greater reproductive ratios. The long-term projections of the patch growth model suggest much slower spread than has typically been observed for M. vimineum. The small scale of natural dispersal suggests that human-mediated dispersal, likely influenced by forest road management, is responsible for the rapid spread of this invasive species.

Comments

This work was partially supported by the National Research Initiative of the USDA-CSREES, grant number 2007-02917.

DOI

10.1007/s10530-009-9463-y

Version

Postprint

Volume

12

Issue

3

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