Functional distance is driven more strongly by environmental factors than by genetic relatedness in Juniperus thurifera
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RESEARCH PAPER
Functional distance is driven more strongly by environmental factors than by genetic relatedness in Juniperus thurifera L. expanding forest stands Jesus Villellas 1 & Irene Martín-Forés 1,2 & Stephanie Mariette 3 & Marie Massot 3 & Erwan Guichoux 3 & Belén Acuña-Míguez 1 & Arndt Hampe 3 & Fernando Valladares 1,4 Received: 16 April 2020 / Accepted: 11 June 2020 # INRAE and Springer-Verlag France SAS, part of Springer Nature 2020
Abstract & Key message In our study of colonisation of abandoned farmland by Juniperus thurifera L., environmental and geographic distances were stronger drivers of functional differentiation among trees than genetic distance and tree intrinsic features. However, these effects varied both along the colonisation gradient and across predictors’ values, highlighting the complexity of the conditions under which functional diversity of forests is maximised. & Context Forest expansion after land abandonment is changing Mediterranean landscapes, but the underlying ecological and evolutionary processes remain poorly understood. & Aims We evaluated whether forest expansion reduces within-stand tree functional distances and whether its environmental, geographical and genetic drivers vary along the expansion gradient. & Methods We sampled Juniperus thurifera in mature, transition and expanding stands along a colonisation gradient in Spain. We measured functional traits, genetic relatedness, surrounding vegetation cover and intrinsic features (size, phytosanitary status)
Jesus Villellas and Irene Martín-Forés are the co-first authors Handling Editor: Raquel Alfaro-Sánchez Contributions of the co-authors: AH, IMF and FV conceived the study. IMF and BAM carried out sampling. SM, MM and EG performed genetic analyses. JV performed the statistical analyses and wrote the original draft with the help from IMF, AH, FV and BAM. All authors revised and approved the final manuscript. This article is part of the topical collection on Establishment of secondgrowth forests in human landscapes: ecological mechanisms and genetic consequences * Jesus Villellas [email protected]
Arndt Hampe [email protected] Fernando Valladares [email protected]
Irene Martín-Forés [email protected]; [email protected] Stephanie Mariette [email protected]
1
Departamento Biogeografía y Cambio Global, Museo Nacional de Ciencias Naturales, MNCN-CSIC, E-28006 Madrid, Spain
Marie Massot [email protected]
2
School of Biological Sciences, The University of Adelaide, Davies, Waite Campus, Adelaide, Australia
Erwan Guichoux [email protected]
3
BIOGECO, INRA, University of Bordeaux, 33610 Cestas, France
4
Departamento de Biología y Geología, Física y Química Inorgánica, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain
Belén Acuña-Míguez [email protected]
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Annals of Forest Science
(2020) 77:66
on trees. We calculated within-stand pairwise functional distances and quantified the effects of genetic relatedness, geographic distance, veget
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