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Gap dynamics in perennial subalpine grasslands: trends and processes change during secondary succession / Vigdis Vandvik in Journal of ecology, 92 (2004) 

Public Citation [article]  inJournal of ecology > 92 (2004) . - 86-96 Titre : Gap dynamics in perennial subalpine grasslands: trends and processes change during secondary succession Type de document : Imprimé Auteurs : Vigdis Vandvik Année de publication : 2004 Article en page(s) : 86-96 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Prairies humides et hautes communautés herbeuses [CBNPMP-Thématique] Revégétalisation Résumé : 1 Revegetation of gaps may affect the floristic composition of subalpine grasslands during secondary succession. Six hypotheses concerning overall effects, gap-size and edge effects, and changes in these during secondary succession, are tested using principal response curves (PRCs), a recent derivative of partial redundancy analysis. 2 In a field experiment, large (625 cm2) and small (39 cm2) gaps and controls were established in a replicated successional series (0, 10 and 40 years after abandonment). Colonization modes were quantified in year 1, and the floristic composition was monitored twice yearly over four growing seasons. 3 Micro-successions in gaps account for 8.8–12.2% of the compositional variance. Size effects add 3.3–5.5% per successional stage, while edge effects appear only in the mid-successional stage (adding 1.6%). Seed colonization rates are comparable with those observed in temperate systems, and the effects on community composition are considerable (initial gap response, size effect). In contrast, changes in local competitive regimes have weaker effects (revegetation dynamics after the first year, edge effects). This may be attributed to the slow growth rates of alpine plants and the short growing season in subalpine climates, as well as to the infertile soils of the semi-natural grasslands. 4 A majority (74%) of the species are affected by gaps, but their responses are not consistent across successional stages. Species that recruit into gaps primarily as seedlings, and locally rare species, become relatively more dependent on gaps for local population persistence during succession. 5 These experiments give insight into the effects of gap revegetation processes for community composition and population persistence in these perennial grasslands. During secondary succession, changes in disturbance regime affect the gap revegetation processes and the probability for local population persistence for gap-enhanced species. Lien pérenne : DOI : 10.1111/j.1365-2745.2004.00842.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=151811 Vandvik, Vigdis 2004 Gap dynamics in perennial subalpine grasslands: trends and processes change during secondary succession. Journal of ecology, 92: 86-96.

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Consultable Article (2004) URL

Impact of nitrogen deposition on species richness of calcareous grasslands in Europe - some preliminary results / Didier Alard (2011) 

Public Citation est un extrait de Nitrogen deposition and Natura 2000 / W. Kevin Hicks (2011)  Titre : Impact of nitrogen deposition on species richness of calcareous grasslands in Europe - some preliminary results Type de document : Extrait d'ouvrage Auteurs : Didier Alard ; Edu Dorland (1974-) ; C. Dupre ; C. Stevens ; Cassandre Gaudnik ; Emmanuel Corcket ; N. Dise ; Martin Diekmann ; Roland Bobbink ; Per Arild Aarrestad ; Vigdis Vandvik ; D. Gowing Année de publication : 2011 Importance : p. 154-160 Résumé : This paper seeks to determine whether N-deposition has a negative impact on the species richness of calcareous grasslands at a European wide scale. 100 calcareous grasslands across the Atlantic region of Europe were sampled in one season. Species composition and richness of vegetation communities were compared to some key environmental drivers (climate and N deposition) indirectly estimated via surrogates (latitude, longitude, N concentration in bryophyte tissue). There are marked differences in species composition across the calcareous grasslands of the Atlantic biogeographic zone within Europe. Contrasts in mean species richness between regions are also detectable at a European wide scale. These natural gradients may mask any footprint of N deposition on vegetation at a European-wide scale. For grasslands located along the western range of distribution, there are indications of a decline in species richness as N concentration in moss increases. This suggests that N deposition may be reducing biodiversity in calcareous grasslands at a wide scale, but that this impact can only be detected at the regional, rather than cross-European, level. Further research is needed to investigate the impact of N deposition on calcareous grasslands, particularly through the direct assessment of potential drivers as well as the characterisation of variations in species pools at the European scale. Lien pérenne : HAL : hal-02806606 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150039 Alard, Didier, Dorland, Edu (1974-), Dupre, C., Stevens, C., Gaudnik, Cassandre, Corcket, Emmanuel, Dise, N., Diekmann, Martin, Bobbink, Roland, Aarrestad, Per Arild, Vandvik, Vigdis, Gowing, D. 2011 Impact of nitrogen deposition on species richness of calcareous grasslands in Europe - some preliminary results. In: Nitrogen deposition and Natura 2000. COST office, [S.l.]: 154-160.

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Consultable Chapitre 5.6 (2011) Adobe Acrobat PDF

Summary for policymakers of the thematic assessment report on invasive alien species and their control of the intergovernmental science-policy platform on biodiversity and ecosystem services / Helen E. Roy (2023) 

Public Citation Titre : Summary for policymakers of the thematic assessment report on invasive alien species and their control of the intergovernmental science-policy platform on biodiversity and ecosystem services Type de document : Électronique Auteurs : Helen E. Roy ; Aníbal Pauchard ; Peter Stoett ; Tanara Renard Truong ; Sven Bacher ; Bella S. Galil ; Philip Eric Hulme ; Tohru Ikeda ; Kavileveettil Sankaran ; Melodie A. McGeoch ; Laura A. Meyerson ; Martin A. Nuñez ; Alejandro Ordonez ; Sebataolo J. Rahlao ; Evangelina Schwindt ; Hanno Seebens ; Andy W. Sheppard ; Vigdis Vandvik Editeur : Bonn : IPBES secretariat Année de publication : 2023 Importance : 52 p. ISBN/ISSN/EAN : 978-3-947851-35-5 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Lien pérenne : DOI : 10.5281/zenodo.7430692 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152476 Roy, Helen E., Pauchard, Aníbal, Stoett, Peter, Renard Truong, Tanara, Bacher, Sven, Galil, Bella S., Hulme, Philip Eric, Ikeda, Tohru, Sankaran, Kavileveettil, McGeoch, Melodie A., Meyerson, Laura A., Nuñez, Martin A., Ordonez, Alejandro, Rahlao, Sebataolo J., Schwindt, Evangelina, Seebens, Hanno, Sheppard, Andy W., Vandvik, Vigdis , 2023. Summary for policymakers of the thematic assessment report on invasive alien species and their control of the intergovernmental science-policy platform on biodiversity and ecosystem services. IPBES secretariat, Bonn. 52 pp.

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Consultable Rapport (2023) URL