NDLI: Optimal spatial management of an invasive plant using a model with above- and below-ground components

Content Provider	Springer Nature Link
Author	Hughes, M. Joseph Johnson, Elizabeth G. Armsworth, Paul R.
Copyright Year	2013
Abstract	Invasive species can disrupt and damage their non-native habitats and are often the focus of control efforts. Motivated by considering the control of kudzu (Pueria montana) by grazers, we model plant growth with above- and below-ground components where grazing pressure is applied in discrete pulses. We compare two strategies, one that manages for eradication and one that minimizes above-ground biomass to maximize a site’s aesthetic and recreational value (beautification). We then consider the spatial allocation of a limited budget to protect a prioritized target patch from invasion from neighboring patches. Optimal management for the beautification goal and eradication goal are similar when budgets are limited and when the initial invasion size is small. Management diverges when budgets or initial invasion size are large. As such, smaller management efforts have less of an imperative to carefully define their management goal. Additionally, our model suggests the ability of the invading plant to respond after control or disturbance, and not overall growth rate, is the important factor when considering differences in optimal management strategies between different goals. Non-target patches were controlled more often when budgets were larger, initial invasion sizes on the target patch were small, and growth rates were low. This pattern suggests that controlling even small non-target patches is only economically favorable when continued control of the target patch passes a threshold of diminishing returns, counter to classic results where small satellite populations are controlled first to prevent new growth.
Starting Page	1009
Ending Page	1020
Page Count	12
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	16
Issue Number	5
e-ISSN	15731464
Language	English
Publisher	Springer International Publishing
Publisher Date	2013-09-29
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biological invasions Eradication Spatial modeling Defensive management Kudzu Weed control Ecology Freshwater & Marine Ecology Plant Sciences Developmental Biology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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