Range expansion of nonindigenous caribou in the Aleutianarchipelago of Alaska

Biological Invasions
By: , and 

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Abstract

Caribou (Rangifer tarandus) are nonindigenous to all but the eastern-most island of the Aleutian archipelago of Alaska. In 1958–1959, caribou were intentionally introduced to Adak Island in the central archipelago, and the population has at least tripled in recent years subsequent to the closure of a naval air facility. Although dispersal of caribou to adjacent islands has been suspected, no historical documentation has occurred to date. Herein, we report consistent detections of caribou sign on the adjacent island of Kagalaska over 2 summer field seasons (2010–2011), and visual detection of caribou on that island during the summer of 2011. Ecological impacts of caribou on Kagalaska are not strongly apparent at the present time and we do not know how many animals permanently occupy the island. However, establishment of a reproductively viable resident population on Kagalaska is worrisome and could set the stage for a step-wise invasion of additional nearby islands.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Range expansion of nonindigenous caribou in the Aleutianarchipelago of Alaska
Series title Biological Invasions
DOI 10.1007/s10530-012-0195-z
Volume 14
Issue 9
Year Published 2012
Language English
Publisher Kluwer Academic Publishers
Publisher location Dordrecht
Contributing office(s) Western Ecological Research Center
Description 6 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Biological Invasions
First page 1779
Last page 1784
Country United States
State Alaska
Other Geospatial Aleutian Islands