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dc.contributor.author | Buyens, Isabelle Patricia Rita![]() |
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dc.contributor.author | Raath-Krüger, Morgan Jade![]() |
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dc.contributor.author | Haddad, William A.![]() |
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dc.contributor.author | Le Roux, Peter Christiaan![]() |
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dc.date.accessioned | 2024-08-19T11:13:50Z | |
dc.date.available | 2024-08-19T11:13:50Z | |
dc.date.issued | 2023-07 | |
dc.description | DATA AVAILABILITY STATEMENT : Accompanying data and R scripts can be accessed at https://catal ogue.saeon.ac.za/recor ds/10.15493/ SAPRI.08172023. | en_US |
dc.description | SUPPORTING INFORMATION : APPENDIX S1. Pictures of the study site and species on sub-Antarctic Marion Island. APPENDIX S2. Variation of abiotic variables with elevation and aspect. APPENDIX S3. Scoria volumetric water content below Azorella selago, and mean (±SE) scoria moisture beneath A. selago and adjacent sites. APPENDIX S4. Vascular plant, hepatic, lichen and moss species occurrences on Azorella selago and adjacent sites. APPENDIX S5. The correlation between the competitive importance index and the relative interaction intensity index for species richness and cover of vascular plants, hepatics, mosses and lichens. APPENDIX S6. Competitive importance index from distal models for the richness and the cover of vascular plants, hepatics, mosses and lichens. APPENDIX S7. Competitive importance index from proximal models for the richness and cover of vascular plants, hepatics, mosses and lichens. APPENDIX S8. Mean (±SE) competitive importance index for the richness and cover of vascular plant, hepatic, moss and lichen species. APPENDIX S9. Changes in the competitive importance index for species richness (mean ± SE) with elevation (m a.s.l.) for vascular plants, hepatic lichens and mosses. APPENDIX S10. Changes in the competitive importance index for species cover (mean ± SE) with elevation (m a.s.l.) for vascular plants, hepatics, lichens and mosses. | en_US |
dc.description.abstract | QUESTION : Plant–plant interactions can strongly influence community structure and composition. The outcome of these interactions can vary considerably across space and is often linked to environmental conditions, with, for example, a higher prevalence of facilitative interactions typically being observed under greater environmental severity. To date, most studies have documented shifts from competitive to facilitative (or neutral) plant–plant and plant–lichen interactions along gradients of increasing environmental severity from pairwise interspecific interactions. However, few studies have examined if the outcome of these interactions for different taxonomic groups is dependent on environmental conditions across multiple environmental stress gradients. Location: Sub-Antarctic Marion Island. METHODS : We examine community-level variation in the response of four taxa (i.e., vascular plants, hepatics, mosses, and lichens) to an interaction with a long-lived cushion plant species (Azorella selago) that ameliorates microenvironmental conditions, testing how the effect of the cushion plant on the taxa varies along multiple stress gradients at the scale of a landform. RESULTS : Contrary to expectations, even when considering multiple proximate predictor variables, fine-scale spatial variation in the effect of A. selago on the taxa could not be explained. However, the outcome of the interaction with A. selago differed between taxonomic groups, with vascular plants benefitting and the non-vascular taxa experiencing neutral or negative impacts. CONCLUSIONS : This study highlights that the impacts of biotic interactions cannot always be generalized across plant groups, and that it is necessary to consider taxon-specific responses when predicting community-level impacts of biotic interactions. More generally, we demonstrate how complex spatial variation in environmental stressors can be explicitly considered when modelling variation in the outcome of plant–plant interactions. | en_US |
dc.description.department | Plant Production and Soil Science | en_US |
dc.description.librarian | am2024 | en_US |
dc.description.sdg | SDG-15:Life on land | en_US |
dc.description.sponsorship | The National Research Foundation's South African National Antarctic Programme; the National Research Foundation Innovation Master's Scholarship; the NRF Externally Funded UP Postdoctoral Fellowship Programme. | en_US |
dc.description.uri | http://www.wileyonlinelibrary.com/journal/jvs | en_US |
dc.identifier.citation | Buyens, I.P.R., Raath-Krüger, M.J., Haddad, W.A. & le Roux, P.C. (2023) Fine-scale variation in the effect of the cushion plant Azorella selago on vascular plants, mosses, hepatics and lichens in the sub-Antarctic. Journal of Vegetation Science, 34, e13200. Available from: https://DOI.org/10.1111/jvs.13200. | en_US |
dc.identifier.issn | 1100-9233 (print) | |
dc.identifier.issn | 1654-1103 (online) | |
dc.identifier.other | 10.1111/jvs.13200 | |
dc.identifier.uri | http://hdl.handle.net/2263/97717 | |
dc.language.iso | en | en_US |
dc.publisher | Wiley | en_US |
dc.rights | © 2023 The Authors. Journal of Vegetation Science published by John Wiley & Sons Ltd on behalf of International Association for Vegetation Science. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License. | en_US |
dc.subject | Cushion plant | en_US |
dc.subject | Facilitation | en_US |
dc.subject | Fine-scale variation | en_US |
dc.subject | Plant–lichen communities | en_US |
dc.subject | Plant–lichen interactions | en_US |
dc.subject | Plant–plant interactions | en_US |
dc.subject | Proximal variables | en_US |
dc.subject | Stress gradient | en_US |
dc.subject | Sub-Antarctic | en_US |
dc.subject | SDG-15: Life on land | en_US |
dc.title | Fine-scale variation in the effect of the cushion plant Azorella selago on vascular plants, mosses, hepatics and lichens in the sub-Antarctic | en_US |
dc.type | Article | en_US |