Trend analysis shows decline of an endangered thermophilic springsnail (Pyrgulopsis bruneauensis) in southwestern Idaho

Publication Type:

Journal Article

Authors:

Myler, Cary D.; Mladenka, Greg C.; G. Wayne Minshall

Source:

Western North American Naturalist, Monte L. Bean Life Science Museum, Brigham Young University, Volume 67, Issue 2, p.199-205 (2007)

Call Number:

A07MYL01IDUS

URL:

https://ojs.lib.byu.edu/spc/index.php/wnan/article/view/27634

Keywords:

aquifer, Bruneau hot springsnail, Pyrgulopsis bruneauensis, SWAP, thermal springs

Abstract:

The authors analyzed population trend data during 1991–2004 for the Bruneau hot springsnail (Pyrgulopsis bruneauensis) from rangewide hot spring surveys completed along 4 km of Bruneau River. The objectives of this study were to analyze population trends and assess other measured parameters, such as water temperature, specific conductance, and groundwater decline, for changes that may influence population trends. Simple linear regression was used to determine significant relationships between measured parameters. Total numbers of hot springs surveyed in the 4-km reach are declining at a rate of ~5 hot springs per year, and numbers of hot springs containing P. bruneauensis in the same reach are declining at a rate of 3.75 per year. The decline of hot springs with and without P. bruneauensis was found to be significantly related to the decline of the thermal aquifer which underlies this area.

Notes:

ELECTRONIC FILE - Zoology: Invertebrates

SWAP (2/19/2016) citation:
Myler CD, Mladenka GC, Minshall GW. 2007. Trend analysis shows decline of an endangered thermophilic springsnail (Pyrgulopsis bruneauensis) in southwestern Idaho. [accessed 2015 Jun 1]; Western North American Naturalist. 67(2):199–205. https://journals.lib.byu.edu/spc/index.php/wnan/article/download/27634/2...