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Journal Articles Anthropocene Year : 2020

The end of a myth: Solving the knotweeds invasion “problem”


Managing invasive species is currently a key issue for preserving biodiversity. The role of managers of transport infrastructure is essential because roads, railways and rivers are known to facilitate the spread of invasive species. This is the case for Fallopia spp. (knotweeds) in particular, which is a highly invasive species in Europe. Previous studies have indicated strong motivation among environmental managers to take action against this plant. Little is known, however, about the reasons for this motivation. This article seeks to better understand these motivations by focusing on the perceptions and management practices of managers working along transport infrastructures. To this end, a questionnaire survey was conducted on the Internet with 199 French managers of roads, rivers or railways. Results indicate that these managers act, above all, for reasons related to biodiversity but that their motivations and perceptions vary according to their knowledge and their management area (road, railway or river). These different professional cultures and the existence of institutional compartmentalization underline the need for greater cooperation among managers. Results also show that the managers' perceptions and practices have evolved over the last 10 years. In particular, actions that they implement and consider repetitive and ineffective today cause great discouragement. This finding underlines the need to evolve in the management of Fallopia spp. This species should no longer be perceived as a "problem" to solve once and for all but as an object to manage day after day using an adaptive strategy.

Dates and versions

hal-03129029 , version 1 (02-02-2021)



Marylise Cottet, Anne Rivière-Honegger, Lise Vaudor, Léa Colombain, Fanny Dommanget, et al.. The end of a myth: Solving the knotweeds invasion “problem”. Anthropocene, 2020, 30, pp.11/100240. ⟨10.1016/j.ancene.2020.100240⟩. ⟨hal-03129029⟩
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