Translator Disclaimer
1 July 2013 Life History and Demography of Astragalus microcymbus Barneby (Fabaceae)
Michelle E. DePrenger-Levin, Jennifer M. Ramp Neale, Thomas A. Grant, Carol Dawson, Yasemin Ergüner Baytok
Author Affiliations +
Abstract

Astragalus microcymbus (Fabaceae) is a rare forb endemic to Gunnison County, Colorado. For 17 years, Denver Botanic Gardens and the U.S. Bureau of Land Management (Colorado State Office) have monitored four populations of this candidate species under the ESA in the South Beaver Creek Natural Area. Large, statistically significant population declines have been documented, as have prolonged dormancy, episodic fruit production, and herbivory. This study was initiated to learn about the life history of this rare species, determine the population trends, and examine management actions that will best support long-term survival of this species. Results indicate that while Astragalus microcymbus is declining in overall population size, it is following a large time scale cyclical pattern of growth and decline. Additional study is needed to fully understand the mechanisms driving mast seeding, prolonged dormancy, and population trends in this rare species.

Michelle E. DePrenger-Levin, Jennifer M. Ramp Neale, Thomas A. Grant, Carol Dawson, and Yasemin Ergüner Baytok "Life History and Demography of Astragalus microcymbus Barneby (Fabaceae)," Natural Areas Journal 33(3), 264-275, (1 July 2013). https://doi.org/10.3375/043.033.0305
Published: 1 July 2013
JOURNAL ARTICLE
12 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top