Abstract
Abstract Rodent biogeographic studies are disproportionately scarce in Iran, however, they are an ideal system to understand drivers of biodiversity distributions in the country. The aims of the present research are to determine (i) the pattern of rodent richness across the country, (ii) quantify their elevational distribution patterns, and (iii) explore the underlying mechanisms. To reach these goals, an updated species list was compiled based on the latest taxonomic revisions, published until December 2021. We mapped all 76 rodent species distributions to develop the first map of rodent richness in Iran. We furthermore investigated their elevational distribution patterns in the following four geographic regions based on 100 m intervals; the Zagros Mountains, north of Alborz Mountains, south of Alborz and Kopet-Dagh mountains, and central and east mountains. North-east of Iran, Zagros Mountains, Alborz Mountains, and northwestern of Iran showed the highest richness and were identified as biodiversity hotspots of rodents in the country. This study highlights the importance of past climate change as the key driver of rodent richness in Iran. We showed that rodents’ elevational distribution patterns differ among geographic regions. Areas and elevational zones with the highest species richness should be prioritized for the conservation planning of rodents in Iran.
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