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, Agustina Novillo Instituto de Biodiversidad Neotropical (CCT-CONICET TUCUMAN) , Residencia Universitaria Horco Molle s/n, CP 4017, Tucumán , Argentina Corresponding author: Agustina Novillo, Instituto de Biodiversidad Neotropical (CCT-CONICET TUCUMAN), Residencia Universitaria Horco Molle s/n, CP 4017, Tucumán, Argentina. Email: agustina.novillo@conicet.gov.ar Search for other works by this author on: Oxford Academic Cecilia Lanzone Laboratorio de Genética Evolutiva FCEQyN (IBS, CONICET-UNaM) , Félix de Azara 1552, CP 3300, Misiones , Argentina Search for other works by this author on: Oxford Academic J Pablo Jayat Unidad Ejecutora Lillo (CONICET-Fundacion Miguel Lillo) , Miguel Lillo 251, CP 4000, Tucumán , Argentina Search for other works by this author on: Oxford Academic Pablo Teta División Mastozoología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” , Av. Angel Gallardo 470 - C1405DJR, Buenos Aires , Argentina Search for other works by this author on: Oxford Academic Agustina A Ojeda Laboratorio de Filogeografía, Taxonomía Integrativa y Ecología (LFTIE-IADIZA-CCT-CONICET Mendoza) , Avenida Ruiz Leal s/n, Parque General San Martín, CC 507, CP 5500, Mendoza , Argentina Search for other works by this author on: Oxford Academic Luciana Cristobal Instituto de Biodiversidad Neotropical (CCT-CONICET TUCUMAN) , Residencia Universitaria Horco Molle s/n, CP 4017, Tucumán , Argentina Search for other works by this author on: Oxford Academic Ricardo A Ojeda Laboratorio de Filogeografía, Taxonomía Integrativa y Ecología (LFTIE-IADIZA-CCT-CONICET Mendoza) , Avenida Ruiz Leal s/n, Parque General San Martín, CC 507, CP 5500, Mendoza , Argentina Search for other works by this author on: Oxford Academic
Journal of Mammalogy, Volume 105, Issue 2, April 2024, Pages 230–240, https://doi.org/10.1093/jmammal/gyad123
Published:
08 January 2024
Article history
Received:
28 December 2022
Accepted:
11 December 2023
Published:
08 January 2024
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Agustina Novillo, Cecilia Lanzone, J Pablo Jayat, Pablo Teta, Agustina A Ojeda, Luciana Cristobal, Ricardo A Ojeda, Beta diversity patterns in Andean rodents: current and historical factors as drivers of turnover and nestedness, Journal of Mammalogy, Volume 105, Issue 2, April 2024, Pages 230–240, https://doi.org/10.1093/jmammal/gyad123
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Abstract
The Andes are known to be one of the most species-rich regions on Earth, with their origination promoting formation of new habitats and acting as climatic barriers. This orogenic event was structured latitudinally with 3 major segments having different formation times and with different environmental and historical conditions. The Andean region has been historically important in the evolutionary history of small mammals and is considered the region of Earth with the highest values of rodent species richness and turnover. Therefore, the region provides an excellent opportunity to evaluate mechanisms involved in structuring rodent assemblages and beta diversity patterns. Here, we assessed spatial patterns of rodent beta diversity along the Andes Mountains, with specific goals of examining patterns of turnover and nestedness as 2 recognized processes that drive species composition. We explored the role of spatial, climate, and historical factors on beta diversity patterns using geographic range maps for 432 rodent species to construct a species presence–absence matrix. We used piecewise regressions to identify latitudinal breakpoints in turnover and nestedness, and conducted multiple regressions and variation-partitioning approaches to assess the contribution of each set of postulated drivers in shaping beta diversity patterns. Beta diversity decreases from north to south. The highest turnover was located at the Northern Andes (5°N and 10°S) and western-central Andes (20°S and 35°S). Nestedness was higher below 40°S and in some areas of the western-central Andes between 15° and 20°S. Turnover and nestedness registered breakpoints coincident with the Central and Southern Andes limit. Turnover explained most of the beta diversity for all segments, although within the Southern Andes there was also some contribution of nestedness. In all segments, beta diversity was mainly explained by spatial factors with minor contributions from spatially structured climate (Northern Andes), interaction of all factors (Central Andes), and the interaction between current climate and history (Southern Andes).
Resumen
Los Andes son reconocidos como una de las regiones más ricas en especies de la tierra, ya que su levantamiento favoreció la formación de nuevos hábitats y actuó como barrera climática. Este evento orogénico se estructuró latitudinalmente en 3 segmentos, cada uno con tiempos de formación características ambientales y condiciones históricas diferentes. La región Andina ha sido un importante escenario en la historia evolutiva de los pequeños mamíferos y es considerada la región con mayor riqueza y recambio de especies. Por lo tanto, es un excelente escenario para evaluar los mecanismos que estructuran los patrones de diversidad beta del ensamble de roedores. Aquí evaluamos el patrón espacial de la diversidad beta de roedores a lo largo de la Cordillera de los Andes, descomponiéndolo en recambio y anidamiento, con el fin de comprender los procesos subyacentes que determinan la composición de especies. Exploramos el papel de los factores espaciales, climáticos e históricos sobre los patrones de diversidad beta utilizando mapas de distribución geográfica para 432 especies de roedores obtenidos de la Base de Datos de Diversidad de Mamíferos y construimos una matriz de presencia-ausencia de especies (PAM). Utilizamos regresiones por tramos (picewise) para identificar los puntos de quiebre latitudinales en recambio y anidamiento, y realizamos regresiones múltiples y partición de la varianza para evaluar la contribución de cada conjunto de factores en la conformación de los patrones de diversidad beta. La diversidad beta disminuye de Norte a Sur, con un mayor recambio en los Andes del Norte (5°N y 10°S) y en la zona central oeste (20°S y 35°S). El anidamiento fue más alto por debajo de los 40º S y en algunas áreas del centro oeste entre los 15° y 20°S. Tanto el recambio como el anidamiento registraron puntos de quiebre coincidentes con el límite entre el segmento Central y el Sur. El recambio explica la mayor parte de la diversidad beta para todos los segmentos, aunque el anidamiento contribuye también a la diversidad beta de los Andes del Sur. En todos los segmentos andinos la diversidad beta se explicó principalmente por factores espaciales con una menor contribución del clima actual (NA), por la interacción de todos los factores (CA) y la interacción entre el clima histórico con el actual (SA).
Andes, beta diversity, environmental drivers, historic processes, rodents, spatial processes
Andes, diversidad beta, factores ambientales, procesos históricos y espaciales, roedores
© The Author(s) 2024. Published by Oxford University Press on behalf of the American Society of Mammalogists, www.mammalogy.org.
This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/pages/standard-publication-reuse-rights)
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research articles
Associate Editor: Alexandre Percequillo Alexandre Percequillo Associate Editor Search for other works by this author on: Oxford Academic
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