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Auteur Judith Bieberich |
Documents disponibles écrits par cet auteur (2)
Affiner la rechercheAcorns of introduced Quercus rubra are neglected by European Jay but spread by mice / Judith Bieberich in Annals of forest research, 59 (2) (2016)
Titre : Acorns of introduced Quercus rubra are neglected by European Jay but spread by mice Type de document : Imprimé Auteurs : Judith Bieberich ; Marianne Lauerer ; G. Aas Année de publication : 2016 Article en page(s) : 249-258 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Quercus rubra L., 1753 Garrulus glandarius L. Quercus robur L. Cyanocitta cristata L. Sciurus carolinensis Sciurus niger L. Tamias striatus
L. Apodemus sylvaticus L. Apodemus flavicollis Clethrionomys glareolus Microtus arvalis Pitymys subterraneusRésumé : Northern Red Oak (Quercus rubra L.; native in North America) is regarded as an invasive species in Central Europe, where it is the most common non-indigenous broad-leafed tree species in forestry. The species’ impact on native ecosystems and thus its future management are discussed controversially. Because dispersal is an important step in an invasion process, we studied whether European Jays (Garrulus glandarius L.) and mice, both main dispersers of native oaks in Europe, mediate the dispersal of Q. rubra seeds. Morphological characteristics of Q. rubra and native Q. robur L. acorns were quantified according to their implications for dispersal. We tested experimentally whether and to what extent mice and jays collect acorns of both oak species and if their behavior depends on choice options (dual choice vs. no-choice). Acorns were offered on feeding platforms, controlled by scouting cameras. Results showed that Q. rubra acorns have a thicker pericarp, a rounder shape and a higher dry weight compared to acorns of Q. robur. In the behavioral assays jays avoided acorns of Q. rubra if they were offered together with those of Q. robur (dual choice) as well as when Q. rubra acorns were offered alone (no-choice). This selection behavior could be caused by the differences in morphological traits observed between the acorns of the two species. In contrast to jays, mice took acorns of both oak species likewise indicating that seed morphology does not affect the attractiveness of Red Oak acorns for rodents. In conclusion, Quercus rubra is collected by animals in Central Europe to a considerable amount but dispersal should be restricted to moderate distances mediated by mice, leading mainly to stabilizing and increasing existing populations rather than founding of new ones. Lien pérenne : DOI : 10.15287/afr.2016.522 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=154712
in Annals of forest research > 59 (2) (2016) . - 249-258Bieberich, Judith, Lauerer, Marianne, Aas, G. 2016 Acorns of introduced Quercus rubra are neglected by European Jay but spread by mice. Annals of forest research, 59(2): 249-258.Documents numériques
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Titre : Invasive Impatiens glandulifera: a driver of changes in native vegetation? Type de document : Imprimé Auteurs : Judith Bieberich ; Stefanie Müller ; Heike Feldhaar ; Marianne Lauerer Année de publication : 2021 Article en page(s) : 1320-1333 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Impatiens glandulifera Résumé : Biological invasions are one of the major threats to biodiversity worldwide and contribute to changing community patterns and ecosystem processes. However, it is often not obvious whether an invader is the “driver” causing ecosystem changes or a “passenger” which is facilitated by previous ecosystem changes. Causality of the impact can be demonstrated by experimental removal of the invader or introduction into a native community. Using such an experimental approach, we tested whether the impact of the invasive plant Impatiens glandulifera on native vegetation is causal, and whether the impact is habitat-dependent. We conducted a field study comparing invaded and uninvaded plots with plots from which I. glandulifera was removed and plots where I. glandulifera was planted within two riparian habitats, alder forests and meadows. A negative impact of planting I. glandulifera and a concurrent positive effect of removal on the native vegetation indicated a causal effect of I. glandulifera on total native biomass and growth of Urtica dioica. Species α-diversity and composition were not affected by I. glandulifera manipulations. Thus, I. glandulifera had a causal but low effect on the native vegetation. The impact depended slightly on habitat as only the effect of I. glandulifera planting on total biomass was slightly stronger in alder forests than meadows. We suggest that I. glandulifera is a “back-seat driver” of changes, which is facilitated by previous ecosystem changes but is also a driver of further changes. Small restrictions of growth of the planted I. glandulifera and general association of I. glandulifera with disturbances indicate characteristics of a back-seat driver. For management of I. glandulifera populations, this requires habitat restoration along with removal of the invader. Lien pérenne : DOI : 10.1002/ece3.7135 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=153195
in Ecology and evolution > 11 (3) (February 2021) . - 1320-1333Bieberich, Judith, Müller, Stefanie, Feldhaar, Heike, Lauerer, Marianne 2021 Invasive Impatiens glandulifera: a driver of changes in native vegetation? Ecology and evolution, 11(3): 1320-1333.Documents numériques
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