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Greater Sage-GrouseEcology and Conservation of a Landscape Species and Its Habitats$
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Steven Knick

Print publication date: 2011

Print ISBN-13: 9780520267114

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520267114.001.0001

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Greater Sage-Grouse Population Dynamics and Probability of Persistence

Greater Sage-Grouse Population Dynamics and Probability of Persistence

Chapter:
(p.292) (p.293) Chapter Fifteen Greater Sage-Grouse Population Dynamics and Probability of Persistence
Source:
Greater Sage-Grouse
Author(s):

Edward O. Garton

John W. Connelly

Jon S. Horne

Christian A. Hagen

Ann Moser

Michael A. Schroeder

Publisher:
University of California Press
DOI:10.1525/california/9780520267114.003.0016

A study was conducted to analyze Greater Sage-Grouse (Centrocercus urophasianus) populations throughout the species' range by accumulating and estimating counts of males at 9,870 leks identified since 1965. A substantial number of leks are censused each year throughout North America providing a combined total of 75,598 counts through 2007, with many leks having more than thirty years of information. These data sets represent the only long-term database available for Greater Sage-Grouse. The study covered thirty Greater Sage-Grouse populations and all leks surveyed in seven Sage-Grouse Management Zones (SMZs) identified in the Greater Sage-Grouse Comprehensive Conservation Strategy. Model forecasts suggest significant population declines; at least 13% of the populations but none of the SMZs may decline below effective population sizes of fifty within the next three decades, while at least 75% of the populations and 29% of the SMZs are likely to decline below effective population sizes of 500 within 100 years if current conditions and trends persist.

Keywords:   Sage-Grouse Management Zones, Greater Sage-Grouse, Centrocercus urophasianus, leks, population sizes, population declines

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