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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, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 30 July 2021

Ratada 2001: A Rodent Outbreak Following the Flowering of Bamboo (Chusquea Culeou) in Southwestern Argentina

Ratada 2001: A Rodent Outbreak Following the Flowering of Bamboo (Chusquea Culeou) in Southwestern Argentina

Ratada 2001: Una IrrupciÓn De Roedores Siguiendo Al Florecimiento De BambÚ (Chusquea Culeou) En El Suroeste De La Argentina

Chapter:
(p.177) Ratada 2001: A Rodent Outbreak Following the Flowering of Bamboo (Chusquea Culeou) in Southwestern Argentina
Source:
The Quintessential Naturalist
Author(s):

Richard D. Sage

Oliver P. Pearson

Javier Sanguinetti

Anita K. Pearson

Publisher:
University of California Press
DOI:10.1525/california/9780520098596.003.0008

This chapter observes that in the spring of 2000, Chusquea culeou bamboo, the dominant understory plant in the Valdivian forest habitat in southwestern Argentina, flowered over a latitudinal range of 100km and produced a massive amount of seed. It notes that reproductive activity of rodents in the area continued into the subsequent autumn and winter, when rodent numbers reached peak levels and large numbers of drowned rodents appeared on beaches. The chapter further notes that owls and foxes reached high numbers, and that the mean age in populations of Oligoryzomys longicaudatus and Abrothrix longipilis declined. It also observes that in the following (second) spring, reproduction was delayed or suppressed, and by the following (second) autumn populations had declined to unusually low levels. The chapter notes that by the third year after flowering, rodent numbers had returned to levels characteristic of the population in this area.

Keywords:   Chusquea culeou bamboo, Valdivian forest, southwestern Argentina, rodents, owls and foxes, Oligoryzomys longicaudatus, Abrothrix longipilis, reproduction, population

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