Spatial phylogenetics of the grasses in the Southern Cone provides insights into ecology and evolution of the family in South America

Registro completo

Título

Spatial phylogenetics of the grasses in the Southern Cone provides insights into ecology and evolution of the family in South America

Autor(es)

Aagesen, Lone; Salariato, Diego Leonel; Scataglini, María Amalia; Acosta, Juan Manuel; Denham, Silvia Suyai; Delfini Feliciano, Carolina

Afiliación(es) del/de los autor(es)

Aagesen, Lone. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; Argentina
Salariato, Diego Leonel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; Argentina
Scataglini, María Amalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; Argentina
Acosta, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; Argentina
Denham, Silvia Suyai. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Quilmes; Argentina
Delfini Feliciano, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; Argentina

Resumen

In this study we explored the distributions of grass genera in the Southern Cone of South America, applying several phylogenetic diversity metrics and randomization tests. Grasses appear to have been present in South America since its early evolution as tropical understory species more than 60 My years ago. During the course of evolution, grasses have adapted to all terrestrial biomes and become one of the most successful plant families on earth. At present, the Southern Cone contains nearly all terrestrial biomes and a wide range of humid to arid ecoregions. Analyzing 126.514 point occurrences and four plastid markers for 148 genera (91% of the native grass genera), we found that tropical humid regions hold the highest phylogenetic diversity with no observed bias in branch lengths. These results indicate that niche conservatism dominates the diversity pattern of grasses in the Southern Cone. We found significantly low phylogenetic diversity in the Arid Chaco and in the Patagonian Steppe, which suggest ecological filtering in both warm and cold arid regions. The Patagonian Steppe also holds significantly longer branches than expected by chance, as the native grass flora is mainly composed of distantly related Pooideae genera with a northern hemisphere origin. Short branches are found in the Uruguayan Savanna suggesting that these grasslands could be a cradle for grass diversity within the Southern Cone. The dated phylogeny supported the current view of a relatively recent evolution of the family within the Southern Cone with most diversification taking place from the middle Miocene and onwards.

Año de publicación

2023

Idioma

inglés

Formato (Tipo MIME)

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Clasificación temática de acuerdo a la FORD

Ciencias biológicas

Condiciones de uso

Acceso restringido por un tiempo determinado. Estará disponible en: bajo licencia Creative Commons https://creativecommons.org/licenses/by-nc-sa/2.5/ar/

Repositorio digital

CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas

Identificador de proyecto

Consejo Nacional de Investigaciones Científicas y Técnicas/22920200100029