Data/hora: 11/06/2024 00:15:14

Provedor de dados: 	5	
País: 	France	
Título: 	Beyond skepticism: uncovering cryptic refugia using multiple lines of evidence	
Autores: 	De Lafontaine, Guillaume; Amasifuen Guerra, Carlos Alberto; Ducousso, Alexis; Sanchez-goni, Maria-fernanda; Petit, Remy J.	
Data: 	2014-11	
Ano: 	2014	
Palavras-chave: 	Cryptic glacial refugia; Fagus sylvatica (European beech); Genetic structure; Heinrich stadials 1 and 2; Last glacial maximum; Late Pleniglacial interval; Microrefugia; Soil macrofossil charcoal.	
Resumo: 	The increasingly popular opinion that temperate plant and animal species persisted in many small refugia in Europe north of the main southern peninsular refugia directly challenges a classical paradigm. As indirect evidence for the existence of such glacial microrefugia readily accumulates, it is interesting to note that the few direct in situ occurrences of fossils testifying their local existence are almost always debated. Our recent study on European beech (Fagus sylvatica) refugia in south-western France was no exception to this trend. Yet, as mentioned by the philosopher Bertrand Russell, it is not possible ‘to get anywhere if we start from skepticism. We must start from a broad acceptance of whatever seems to be knowledge and is not rejected for some specific reason.’ We therefore believe that no a priori preference should be given to one of the two scenarios of migration from a distant macro-refugium or of survival in situ in small refugia. Microrefugia are by definition spatially restricted and include few and possibly less fit individuals, so that a direct assessment for their existence at the stand-scale is extremely challenging. In fact, without prior information on the possible location of these refugia, finding fossils testifying to their existence is akin to looking for a needle in a haystack. We believe that to uncover glacial micro-refugia, the fossil record needs not to be abundant, as long as the claims are reasonable and the dataset includes both indirect and robust direct field evidence for local presence during the most severe climatic conditions. The criticisms of Huntley extend beyond our own study to other recently published studies on so-called cryptic glacial refugia, that is putative microrefugia inferred indirectly from genetic analyses of extant populations, species distribution modeling (SDM) or regional-scale pollen analyses. As we will now show, considerable progress has been made recently in these fields that deserve to be more widely appreciated.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	https://archimer.ifremer.fr/doc/00289/40066/38821.pdf

https://archimer.ifremer.fr/doc/00289/40066/38822.docx

DOI:10.1111/nph.13089

https://archimer.ifremer.fr/doc/00289/40066/	
Editor: 	Wiley-blackwell	
Formato: 	application/pdf	
Fonte: 	New Phytologist (0028-646X) (Wiley-blackwell), 2014-11 , Vol. 204 , N. 3 , P. 450-454	
Fonte: 	2014 The Authors

info:eu-repo/semantics/openAccess

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