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dc.contributor.author
Mathiasen, Paula
dc.contributor.author
Ignazi, Griselda
dc.contributor.author
Premoli Il'grande, Andrea Cecilia
dc.date.available
2023-01-06T16:58:40Z
dc.date.issued
2021-11
dc.identifier.citation
Mathiasen, Paula; Ignazi, Griselda; Premoli Il'grande, Andrea Cecilia; Biogeographically marginal: source of evolutionary novelties and future potential; Elsevier Science; Forest Ecology and Management; 499; 11-2021; 1-12
dc.identifier.issn
0378-1127
dc.identifier.uri
http://hdl.handle.net/11336/183772
dc.description.abstract
Towards distribution margins, populations are thought to be genetically impoverished due to isolation and genetic drift acting in often small border populations. Here we analyse the hypothesis that contrary to expectations, populations towards the dry Nothofagus pumilio range are relicts of a past distribution, and thus hold comparable levels of genetic diversity than central ones using conserved chloroplast DNA (cpDNA) sequences. We sampled fresh leaf tissue from a total of 70 natural populations along a precipitation gradient in Northern Patagonia, Argentina, from central (N = 33), i. e. humid, to marginal (N = 37), i. e. dry, locations which were analysed by cpDNA sequencing and phylogeographic methods. We also analysed the fate of populations under global scenarios by ecological niche models. The analysis of a total of 186 cpDNA sequences yielded nine different haplotypes, eight and six of which were present in marginal and central regions, respectively. We identified four new haplotypes for the species, three were exclusive to the marginal region and one was also new for the Nothofagus subgenus. Haplotypes were latitudinally structured as previously documented, yet those from marginal and central regions diverged synchronically at ~3.5 Ma. Coalescence analyses yielded larger effective population sizes for marginal populations, except for the northernmost group, and divergence between regions occurred from early to late Pleistocene. Neutrality tests developed to infer past population size changes showed population stability for marginal and central regions yet current range retraction. Future distributions by ecological niche models predict population decay in both central and marginal regions with a stronger effect in the latter. Our results show that marginal populations are as genetically diverse and demographically stable as central ones and their genetic makeup may assure their long-lasting persistence. Unique variants and genetically-based adaptive traits of the former may be used as germplasm sources for restoration under forecasted droughts.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CENTRAL-MARGINAL
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CHLOROPLAST DNA
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FUTURE RANGE
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GENETIC DIVERSITY
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LONG-TERM PERSISTENCE
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STABLE POPULATIONS
dc.subject.classification
Genética y Herencia
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Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Biogeographically marginal: source of evolutionary novelties and future potential
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-10-06T13:13:34Z
dc.journal.volume
499
dc.journal.pagination
1-12
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Mathiasen, Paula. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Patagonia Norte. Instituto de Investigaciones En Biodiversidad y Medioambiente. Subsede San Martín de Los Andes-inibioma | Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Instituto de Investigaciones En Biodiversidad y Medioambiente. Subsede San Martín de Los Andes-inibioma.; Argentina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
dc.description.fil
Fil: Ignazi, Griselda. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Patagonia Norte. Instituto de Investigaciones En Biodiversidad y Medioambiente. Subsede San Martín de Los Andes-inibioma | Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Instituto de Investigaciones En Biodiversidad y Medioambiente. Subsede San Martín de Los Andes-inibioma.; Argentina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
dc.description.fil
Fil: Premoli Il'grande, Andrea Cecilia. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Patagonia Norte. Instituto de Investigaciones En Biodiversidad y Medioambiente. Subsede San Martín de Los Andes-inibioma | Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Instituto de Investigaciones En Biodiversidad y Medioambiente. Subsede San Martín de Los Andes-inibioma.; Argentina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
dc.journal.title
Forest Ecology and Management
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0378112721006861
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.foreco.2021.119596
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