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Lessons learnt from large-scale eradication of Australian swamp stonecrop Crassula helmsii in a protected Natura 2000 site / Janneke M.M. (van der) Loop in Management of biological invasions, 13 (1) (2022) 

Public Citation [article]  inManagement of biological invasions > 13 (1) (2022) . - 101-117 Titre : Lessons learnt from large-scale eradication of Australian swamp stonecrop Crassula helmsii in a protected Natura 2000 site Type de document : Imprimé Auteurs : Janneke M.M. (van der) Loop ; Martijn (van de) Loo ; Wouter de Vries ; Laura S. (van) Veenhuisen ; Hein H. (van) Kleef ; Rob S. E. W. Leuven Année de publication : 2022 Article en page(s) : 101-117 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Crassula helmsii (Kirk) Cockayne, 1907 Résumé : The eradication of the aquatic invasive Australian swamp stonecrop Crassula helmsii in North-western Europe usually fails. This is especially true for areas where this plant species is abundant and wide spread or the probability of re-infestation is high due to hydrological connectivity with other infested surface waters or wetlands. Therefore, the large-scale eradication of this invader is often assumed not to be cost-effective. In 2018, C. helmsii was eradicated in a wetland of 4.5 ha covering interconnected humid dune valleys on the Wadden Island of Terschelling in the Netherlands. The total costs of this large-scale project were estimated to be 1.5 million euro. The applied method was excavation of infested locations and replenishing these areas with clean (uncontaminated by C. helmsii) sand to restore boundary conditions suitable for recovery of the treated habitats in this Natura 2000 site. An eight step approach was implemented to eradicate the invasive plant species. Aftercare consisted of a monitoring program with six-weekly vegetation surveys for early detection of any regrowth of C. helmsii and assessment of the effectiveness of the eradication measures. The eradication of C. helmsii was regarded successful since this fast growing plant species was not observed in the areas of concern during a period of at least two years. The results of a strength, weaknesses, opportunities and threads (SWOT) analysis revealed that the method for eradication of this invasive plant species was effective to secure nature values but also complex, time consuming and costly. Our lessons learnt and recommendations for management will help other nature managers making the right decisions in determining appropriate eradication measures for C. helmsii. Lien pérenne : DOI : 10.3391/mbi.2022.13.1.06 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152449 Loop, Janneke M.M. (van der), Loo, Martijn (van de), Vries, Wouter de, Veenhuisen, Laura S. (van), Kleef, Hein H. (van), Leuven, Rob S. E. W. 2022 Lessons learnt from large-scale eradication of Australian swamp stonecrop Crassula helmsii in a protected Natura 2000 site. Management of biological invasions, 13(1): 101-117.

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The ecosystem resilience approach to control the invasive alien species Australian swamp stonecrop (Crassula helmsii) / Janneke M.M. (van der) Loop in Restoration ecology, 31(3) (2023) 

Public Citation [article]  inRestoration ecology > 31(3) (2023) . - e13844 Titre : The ecosystem resilience approach to control the invasive alien species Australian swamp stonecrop (Crassula helmsii) Type de document : Imprimé Auteurs : Janneke M.M. (van der) Loop ; Hein H. (van) Kleef ; Laura S. (van) Veenhuisen ; Leon L. Lamers ; Rob S. E. W. Leuven Année de publication : 2023 Article en page(s) : e13844 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Crassula helmsii (Kirk) Cockayne, 1907 Résumé : The invasive Australian swamp stonecrop (Crassula helmsii) threatens species characteristic of shallow soft water lakes and pools, among others, in Europe. Anthropogenic disturbances, including restoration actions, of these ecosystems cause open niches in their littoral zones and allow C. helmsii to form dominant stands, especially under nutrient enrichment. Eradication of this invasive alien, amphibious, and clonal plant is, however, difficult and costly once a large population has established. For this reason, we here explore an ecosystem resilience approach (ERA) to control this invasive alien species. This approach includes suppressing the species by facilitating the occurrence and expansion of native vegetation. This requires a setback of C. helmsii's abundance by actively reducing its biomass, and the rehabilitation of optimal environmental conditions for native species. Our ERA study in four nature areas reveals that the introduction of native species makes the ecosystem more resilient against alien invasions, as shown by a lower abundance of this invasive plant species. Therefore, we state that ERA can effectively be applied in practice to decrease the invasibility of ecosystems by C. helmsii. Effectiveness, costs and benefits, and recommendations for application in practice are discussed. Overall, we argue that incorporating ERA in nature and water management will provide sustainable solutions in terms of biodiversity as well as more cost-effective applications for invasive alien species prevention and control. Lien pérenne : DOI : 10.1111/rec.13844 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152460 Loop, Janneke M.M. (van der), Kleef, Hein H. (van), Veenhuisen, Laura S. (van), Lamers, Leon L., Leuven, Rob S. E. W. 2023 The ecosystem resilience approach to control the invasive alien species Australian swamp stonecrop (Crassula helmsii). Restoration ecology, 31(3): e13844.

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Consultable Article (2023) URL