UI Center for Research on Invasive Species and Small Populations UI Center for Research on Invasive Species and Small Populations University of Idaho College of Natural Resources University of Idaho College of Agricultural and Life Sciences Image Map
Aug 082012
 

Jodi Johnson-MaynardAssociate Professor of Soil Science
Plant, Soil, and Entomological Sciences

(208) 885-9245
jmaynard@uidaho.edu

 

Biography

Dr. Jodi Johnson-Maynard received a MS in Soil Science from the University of Idaho and a PhD in Soil and Water Sciences from the University of California, Riverside. Jodi’s research is focused on earthworm ecology, carbon and nitrogen cycling and soil-plant interactions. She also advises undergraduate and graduate students and teaches Soil 205, The Soil Ecosystem. For the past five years Jodi has served on the Idaho Carbon Sequestration Advisory Committee, a group focused on outreach and education relating to carbon sequestration and credit trading. more info

CRISSP Research

Current research in our laboratory on native earthworms is directly related to CRISSP since it deals with small (extremely small) populations. Earthworm populations in the Palouse region are dominated by exotic species. Through some combination of land use change and competition with introduced species, native earthworms are rare and appear to occur in isolated patches. Further research is needed to better understand the ecology of native species and the factors that have contributed to their decline. Another area of interest in our laboratory is the co-evolution of plants and soils. The ability of some invasive plant species, a main focus of CRISSP, to alter soil conditions once they are established has been documented. Chemical and physical changes occurring in the soil after invasion may benefit the invasive plant. In parts of the Clearwater National Forest in Idaho bracken fern invades following timber harvest. Once bracken is established natural conifer regeneration is virtually non-existent. We have been studying the ability of bracken fern to alter soil chemical properties as a mechanism to explain the lack of secondary succession within these areas. Better knowledge of the role that soil plays in biological invasions may lead to better methods of predication and control.

CRISSP Classes

(click on the links below for more information)

Soil 205 – The Soil Ecosystem

 August 8, 2012
Aug 072012
 

Title: Giant Palouse Earthworm
Student: Yaniria Sanchez-de Leon
Department: Plant, Soil, and Entomological Sciences

Project Summary

Driloleirus americanus is the only known native earthworm in the Palouse region. The main habitat of this earthworm is Palouse Prairie which has largely been converted to agricultural lands. Before the earthworm was found by a CRISSP-funded graduate student (Yaniria Sanchez-de Leon) working in our lab in 2005, it was thought to be extinct. Currently we are focusing on determining the range of this rare earthworm and testing methods to identify habitat using less destructive sampling methods.

For more information, email the PI: Dr. Jodi Johnson-Maynard

Giant Palouse Earthworm in comparison to the invasive A. trapezoides (the most common earthworm within the Palouse region)

Giant Palouse Earthworm in comparison to the invasive A. trapezoides (the most common earthworm within the Palouse region)

Yaniria Sanchez-de Leon sampling in a native Palouse prairie remnant.

Yaniria Sanchez-de Leon sampling in a native Palouse prairie remnant.

 August 7, 2012