ETD PDF

Spatial and Seasonal Variability of Earthworms in Wheat Fields of the Inland Pacific Northwest

Citation

Walsh, Chelsea. (2015). Spatial and Seasonal Variability of Earthworms in Wheat Fields of the Inland Pacific Northwest. Theses and Dissertations Collection, University of Idaho Library Digital Collections. https://www.lib.uidaho.edu/digital/etd/items/walsh_idaho_0089n_10710.html

Title:
Spatial and Seasonal Variability of Earthworms in Wheat Fields of the Inland Pacific Northwest
Author:
Walsh, Chelsea
Date:
2015
Embargo Remove Date:
2017-09-01
Keywords:
agriculture Aporrectodea trapezoides climate earthworm IPNW Palouse
Program:
Plant, Soil and Entomological Sciences
Subject Category:
Soil sciences; Agriculture; Ecology
Abstract:

Spatial and temporal variations in soil conditions are expected to constrain earthworm-mediated benefits to crops and soil health in the Inland Pacific Northwest (IPNW). The objectives of this work were to describe the distribution and diversity of IPNW earthworms across regional and seasonal variation in soil conditions. In the springs of 2012-2013, 36 sites across the IPNW were sampled for earthworms and their density and diversity were measured. Aporrectodea trapezoides was the dominant species at all sites and a threshold for earthworm presence was observed at 330-370mm mean annual precipitation. A second study measured earthworm density and activity over 14 months at six sites in the annual cropping zone of the IPNW. Mean densities of 9 to 149 individuals m-2 over a 121-day active period were recorded. This work provides a starting point for determining the effects of earthworms on regional crop production and the potential impacts of climate change.

Description:
masters, M.S., Plant, Soil and Entomological Sciences -- University of Idaho - College of Graduate Studies, 2015
Major Professor:
Johnson-Maynard, Jodi L
Committee:
Eigenbrode, Sanford; Heinse, Robert; Huggins, David
Defense Date:
2015
Identifier:
Walsh_idaho_0089N_10710
Type:
Text
Format Original:
PDF
Format:
application/pdf

Contact us about this record

Rights
Rights:
In Copyright - Educational Use Permitted. For more information, please contact University of Idaho Library Special Collections and Archives Department at libspec@uidaho.edu.
Standardized Rights:
http://rightsstatements.org/vocab/InC-EDU/1.0/