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The Quintessential NaturalistHonoring the Life and Legacy of Oliver P. Pearson$
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Douglas Kelt and Deborah Kaspin

Print publication date: 2007

Print ISBN-13: 9780520098596

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520098596.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 01 July 2022

The Ecology and Evolutionary History of Oligoryzomys Longicaudatus in Southern South America

The Ecology and Evolutionary History of Oligoryzomys Longicaudatus in Southern South America

ECOLOGÍA E HISTORIA DE Oligoryzomys Longicaudatus En El Sur De SundÁMerica

(p.670) (p.671) The Ecology and Evolutionary History of Oligoryzomys Longicaudatus in Southern South America
The Quintessential Naturalist

R. Eduardo Palma

Fernando Torres-Pérez

Dusan Boric-Bargeto

University of California Press

This chapter determines the ecology and evolutionary relationships among populations whose results have been synthesized, using life-history traits as well as morphological, chromosomal, and molecular tools. It notes that Oligoryzomys longicaudatus is a conspicuous species of sigmodontine rodent from the southern cone of South America, inhabiting Mediterranean environments and both Temperate and Patagonian forests of Chile and Argentina. The chapter observes that O. longicaudatus exhibits high genetic homogeneity, in spite of inhabiting very distinctive ecogeographic areas across a wide latitudinal gradient. It notes that the evolutionary history of these species has been mediated primarily by the biogeographic events of Pleistocene, with a narrow association to the expansion and retraction of Temperate Forests during the Quatemary. The chapter observes that ecological traits show that these species differentiate from other sympatric sigmodontines in characters such as their large home range, high vagility, and almost exclusively granivorous diet.

Keywords:   ecology, evolutionary relationships, Oligoryzomys longicaudatus, sigmodontine rodent, South America, genetic homogeneity, ecogeographic areas, Pleistocene, Temperate Forests, Quatemary

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