Species diversity promotes facilitation under stressful conditions
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Título: | Species diversity promotes facilitation under stressful conditions |
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Autor/es: | Danet, Alain | Bautista, Susana | Génin, Alexandre | Beckerman, Andrew P. | Anthelme, Fabien | Kéfi, Sonia |
Grupo/s de investigación o GITE: | Ecología Experimental de Zonas Áridas (DRYEX) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ecología | Universidad de Alicante. Instituto Multidisciplinar para el Estudio del Medio "Ramón Margalef" |
Palabras clave: | Biodiversity | Dryland | Ecosystem functioning | Facilitation | Functional traits | Plant–plant interactions |
Fecha de publicación: | 23-abr-2024 |
Editor: | John Wiley & Sons |
Cita bibliográfica: | Oikos. 2024. https://doi.org/10.1111/oik.10303 |
Resumen: | Climate change is expected to lead to a drier world, with more frequent and severe droughts, constituting a growing threat to biodiversity, especially in drylands. Positive plant−plant interactions, such as nurse plants facilitating beneficiary communities in their understorey, could mitigate such climate-induced stress. However, testing the real-world relevance of nurse facilitation under drought requires accounting for inter actions within the diverse beneficiary communities, which may reduce, or amplify the buffering effect of a nurse. Here, we investigated when and how the interactions among nurse plants and beneficiary community members buffered drought effects in a Mediterranean semiarid abandoned cropland. We transplanted sapling beneficiary communities of either one or three species either under a nurse or in open microsites for different soil moisture levels through watering. Net facilitative effects on survival and biomass were only observed when beneficiary communities were species-diverse and under drought (without watering), meaning that under these conditions, facilitation provided by the nurse had larger positive effects than the negative effects stemming from competition with the nurse and among beneficiary species. Nurses appear to be generating these increases in survival and biomass in drought conditions via two mechanisms commonly associated with watering in open sites: they generate complementarity among the beneficiaries and shift traits to lower stress profiles. Contrasting with watering, which was found to enhance competitive hierarchy, our study shows that nurses appear to alter species dominance, favouring the less competitive species. Our results highlight three mechanisms (complementarity, competitive dominance, and trait plasticity) by which nurse species could mitigate the loss of biodiversity and biomass production due to water stress. Maintaining and supporting nurse species is thus a potentially pivotal approach in the face of projected increase in drought conditions for many drylands across the world. |
Patrocinador/es: | The research study has received a funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 283068 580 (CASCADE project). SB was jointly supported by the grants CIPROM/2021/001, funded by the PROMETEO Program 2022, Conselleria de Innovación, Universidades, Ciencia y Sociedad Digital, Generalitat Valenciana, and PID2021-125517OB-I00, funded by MCIN/AEI/ 10.13039/501100011033 and by “ERDF A way of making Europe”. AG has received support from the European Union's Horizon 2020 research and innovation programme under the MSCA grant agreement no. 896159 (INDECOSTAB). AD and APB have received support from the Natural Environment Research Council under grant agreement no. NE/T003502/1 awarded to APB. |
URI: | http://hdl.handle.net/10045/142490 |
ISSN: | 0030-1299 (Print) | 1600-0706 (Online) |
DOI: | 10.1111/oik.10303 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2024 The Authors. Oikos published by John Wiley & Sons Ltd on behalf of Nordic Society Oikos. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1111/oik.10303 |
Aparece en las colecciones: | INV - DRYEX - Artículos de Revistas Investigaciones financiadas por la UE |
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