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• W2898071163 startingPage "e1510414" @default.
• W2898071163 abstract "Hispaniola once had a large and diverse endemic rodent community. Today, a single species, Plagiodontia aedium, survives alongside invasive murids. Ecological adaptations and resource competition among species have not been previously studied. Here, we undertake the first investigation of the foraging ecology of the endemic taxa using estimated body mass and carbon and oxygen isotope values in incisor enamel. Our sample includes nine endemic taxa, eight of which are extinct, from two Holocene cave assemblages in southern Haiti. We also measured isotopic signatures for the invasive genus Rattus to explore potential niche overlap and competition between introduced and endemic fauna. We expected to detect isotopic evidence for niche partitioning among phylogenetically related rodents with similar morphological adaptations. We find clear differences in body mass and isotope values among rodent taxa. The combination of carbon and oxygen isotopes suggests that some taxa lived in the forest understory, whereas others likely frequented the canopy or open habitats. We may also be able to distinguish dietary preferences (e.g., folivory, frugivory, and potentially trophic omnivory). Small individuals attributed to an undescribed species of Isolobodon are isotopically distinct from their congeners, I. montanus and I. portoricensis, and appear to have relied to a modest degree on C4 foods. Rattus had a broad generalist niche, which coincided with several endemics, including extant P. aedium. Although preliminary, these data shed light on how a closely related community of island rodents partitions resources and provide context for understanding the ecological role that invasive species may play in extinction processes and future conservation efforts." @default.
• W2898071163 created "2018-10-26" @default.
• W2898071163 creator A5023846597 @default.
• W2898071163 creator A5026842772 @default.
• W2898071163 date "2018-09-03" @default.
• W2898071163 modified "2023-09-27" @default.
• W2898071163 title "Deciphering the isotopic niches of now-extinct Hispaniolan rodents" @default.
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• W2898071163 doi "https://doi.org/10.1080/02724634.2018.1510414" @default.
• W2898071163 hasPublicationYear "2018" @default.
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