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Ajouter le résultat dans votre panierThe invasive herb Lupinus polyphyllus can reduce plant species richness independently of local invasion age / Marju Prass in Biological invasions, 24 (2022)
Titre : The invasive herb Lupinus polyphyllus can reduce plant species richness independently of local invasion age Type de document : Imprimé Auteurs : Marju Prass ; Satu Ramula ; Miia Jauni ; D. Johan Kotze Année de publication : 2022 Article en page(s) : 425-436 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Résumé : The ecological impacts of invasive species may change or accumulate with time since local invasion, potentially inducing further changes in communities and the abiotic environment. Yet, time since invasion is rarely considered when investigating the ecological impacts of invasive non-native species. To examine the effect of time since invasion on the ecological impacts of Lupinus polyphyllus, a perennial nitrogen-fixing herb, we surveyed vascular plant communities in the presence and absence of L. polyphyllus in young, intermediate, and old semi-natural grassland sites (ca. 5, 10, 15 years representing both time since lupine invasion and plant community age). We analyzed vascular plant community composition, vascular plant species richness, and the cover of various ecological plant groups and L. polyphyllus. In contrast to our hypotheses, we found no change in the mean cover of L. polyphyllus (about 35%) with time since local invasion, and an ordination did not suggest marked changes in plant community composition. L. polyphyllus was associated with lower species richness in invaded plant communities but this effect did not change with time since invasion. Invaded plant communities were also associated with lower occurrence of generalist, oligotrophic (low-nutrient-adapted) and copiotrophic (nutrient-demanding) species but no temporal dynamics were detected. We conclude that even the intermediate cover of L. polyphyllus can reduce plant species richness, but the ecological impact caused by this invader might not dramatically change or accumulate with time since invasion. Lien pérenne : DOI : 10.1007/s10530-021-02652-y Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150018
in Biological invasions > 24 (2022) . - 425-436Prass, Marju, Ramula, Satu, Jauni, Miia, Kotze, D. Johan 2022 The invasive herb Lupinus polyphyllus can reduce plant species richness independently of local invasion age. Biological invasions, 24: 425-436.Documents numériques
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Titre : Comparing common fountain grass removal techniques: cost efficacy and response of native plant community Type de document : Imprimé Auteurs : Helen I. Rowe ; Tiffany A. Sprague ; Paul Staker Année de publication : 2022 Article en page(s) : 3817-3830 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Pennisetum setaceum (Forssk.) Chiov., 1923 Résumé : Fountain grass (Pennisetum setaceum) is a globally pervasive invasive species and a prime example of an escaped horticultural ornamental. In areas where it is not naturally found, it displaces native plant communities and disrupts ecological systems and processes. Cost-effective removal efforts that protect the native plant community are needed for its control. We conducted an experiment from March 2018 to March 2021 in 5 m × 5 m plots to test the efficacy and record costs for common removal techniques (cut and herbicide, herbicide one or two times per year, manual removal) in the Sonoran Desert, Arizona, United States. Each treatment took 2.5 years to achieve control in the plots, and treatments did not negatively affect the native plant community. The response of native plants was mediated by year, such that native cover in treatment plots recovered to similar levels as uninvaded control plots with sufficient rainfall. Plots that received the manual removal treatment had almost five more native plant species than the invaded control treatment (22.7 ± 1.63 compared to 18.1 ± 1.61). Herbicide applied in spring and fall increased efficacy of removals in the first year but was not significantly different from the other treatments averaged over year. Herbicide once per year was most cost effective across different sized areas. Manual removal was also cost effective in small areas (< 0.06 hectares) but was more expensive than herbicide twice a year in larger areas. Our results provide a toolset that enables managers to select removal treatments based on a balance of convenience, resources, and scale of the infestation. Lien pérenne : DOI : 10.1007/s10530-022-02879-3 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=151701
in Biological invasions > 24 (2022) . - 3817-3830Rowe, Helen I., Sprague, Tiffany A., Staker, Paul 2022 Comparing common fountain grass removal techniques: cost efficacy and response of native plant community. Biological invasions, 24: 3817-3830.Documents numériques
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