Climatic disequilibrium of recruit communities across a drought-induced die-off gradient in Mediterranean shrubland
Díaz Borrego, Raquel (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Pérez Navarro, María Ángeles (King's College London. Department of Geography)
Jaime, Luciana (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Elvira, Nuria J. (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Lloret Maya, Francisco (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2024
Resum:	Positive plant-plant interactions (facilitation) may enhance the recruitment and establishment of species less adapted to local macroclimatic conditions. A major cause of this effect is climatic buffering, which implies an increased mismatch between the macroclimatic conditions and the climatic requirements of the existing community - climatic disequilibrium - of plants living under canopies. Here we explore the effect of drought-induced defoliation of Mediterranean shrubland canopy on the recruitment of woody species. We analyzed the differences in the climatic disequilibrium across different categories of canopy defoliation and plant-plant interactions: facilitation, neutral and inhibition. Climatic disequilibrium was estimated as the Euclidean distance in the multivariate environmental space between observed macroclimate and community inferred climate. The inferred climate was calculated by averaging the coordinates of the species' climatic niche centroids, obtained from species distribution, weighted by the species' relative abundances in each community. We found that the recruiting community growing under canopy showed higher climatic disequilibrium than the community growing in the gaps. The facilitated recruiting community growing under dead and living canopy showed the highest disequilibrium, followed by the community growing under mid-affected canopy. The climatic disequilibrium of the recruiting communities experiencing neutral and inhibited interaction was not affected by canopy defoliation. These findings indicate that the climatic disequilibrium of the recruiting community is determined by the facilitation-competition balance. Living canopy provides climatic buffering, but it also implies competition, while dead canopy may provide some structural climatic buffering, without implying competition for resources. These results highlight the relevance of incorporating plant-plant interactions, particularly facilitation, to better forecast plant community responses to extreme climate events and climate change.
Ajuts:	Ministerio de Economía y Competitividad CGL2015-67419-R Agencia Estatal de Investigación PID2020-115264RB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1001 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00849
Nota:	Altres ajuts: acords transformatius de la UAB
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Climatic debt ; Climatic disequilibrium ; Drought-induced die-off ; Facilitation ; Global change ecology ; Plant population and community dynamics ; Plant recruitment ; Plant-plant interactions ; Species climatic niche
Publicat a:	Oikos, Vol. 2024, Issue 7 (July 2024) , art e10465, ISSN 1600-0706

DOI: 10.1111/oik.10465

11 p, 1.1 MB

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