Ecological drivers of plant genetic diversity at the southern edge of geographical distributions: Forestal vines in a temperate region
Título del documento: Ecological drivers of plant genetic diversity at the southern edge of geographical distributions: Forestal vines in a temperate region
Revista: Genetics and molecular biology
Base de datos: PERIÓDICA
Número de sistema: 000418157
ISSN: 1415-4757
Autors: 1
2
1
Institucions: 1Universidade Federal do Rio Grande do Sul, Departamento de Genetica, Porto Alegre, Rio Grande do Sul. Brasil
2Universidade Federal de Goias, Departamento de Ecologia, Goiania, Goias. Brasil
Any:
Volum: 41
Paginació: 318-326
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico
Resumen en inglés The Tropical Niche Conservatism hypothesis is one of the most relevant theories to explain why tropical diversity is high, although the mechanisms underlying this hypothesis require further clarification. A possible research avenue to address the underlying mechanisms includes determining population-level processes associated with such a hypothesis, in particular by trying to identify how adaptation may occur in extreme niche conditions at the edges of species ranges. However, the determinants of molecular diversity at the edges of geographical distributions of tropical taxa are still poorly known. Here we assessed which environmental variables determine diversity in nuclear and plastid genetic markers for populations of four Passiflora species in the southern limit of their geographical distribu - tions. Climatic factors can drive genetic diversity, and their importance varies according to the marker. The primary predictors are variables representing higher temperatures during cold periods of the year and higher precipitation during dry periods. We concluded that, although these species are present in colder areas at the edge of their range, Tropical Niche Conservatism acts as a restraining force on genetic diversity in southern populations of Passiflora
Disciplines Biología
Paraules clau: Ecología,
Genética,
Evolución y filogenia,
Bordes,
Distribución geográfica,
Diversidad genética,
Passiflora,
Conservadurismo,
Nichos ecológicos,
Conductores ambientales
Keyword: Ecology,
Genetics,
Evolution and phylogeny,
Edges,
Geographical distribution,
Genetic diversity,
Passiflora,
Conservatism,
Ecological niche,
Environmental drivers
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