thumbnail

Within- and between-year dispersal of American Avocets among multiple western Great Basin wetlands

Wilson Bulletin

By:
, ,

Links

  • The Publications Warehouse does not have links to digital versions of this publication at this time

Abstract

Connectivity of discrete habitat patches may be described in terms of the movements of individual organisms among such patches. To examine connectivity of widely dispersed alkali lake systems, we recorded post-breeding and subsequent breeding locations of color-banded American Avocets (Recurvirostra americana) in the western U.S. Great Basin, from 1995-1997. Among individuals observed during the post-breeding/premigratory season, over half of the 188 breeding adults were observed at lakes other than their breeding locations, whereas 70% of 125 post-fledged young were observed only at their natal lake systems. Of 46 breeding adults observed in consecutive years, only eight (17%) dispersed between different lake systems. Only 8% of chicks were observed after their first year, and only 1.3% returned to the natal area in subsequent breeding seasons. Adult and recently fledged birds from the southernmost breeding site were regularly observed in post-breeding aggregations at lakes several hundred kilometers to the north, suggesting seasonal differences in habitat quality at the lake systems studied. These results indicate the importance of maintaining habitat for post-breeding movements.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Within- and between-year dispersal of American Avocets among multiple western Great Basin wetlands
Series title:
Wilson Bulletin
Volume
111
Issue:
3
Year Published:
1999
Language:
English
Contributing office(s):
Forest and Rangeland Ecosystem Science Center
Description:
p. 314-320
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
314
Last page:
320
Number of Pages:
7