Our research group pursues fundamental questions that delve into the mechanisms and dynamics of plant-microbe-soil interactions, while applied questions aim to harness this knowledge for practical applications in agriculture and environmental management. Microbial dynamics in crop rhizospheres
We are investigating the composition, diversity, and functioning of microbial communities in the rhizosphere of various crops such as corn. Our research aims to uncover how specific root exudates shape microbial diversity and influence nutrient cycling, ultimately impacting agricultural productivity.
Current projects (1) Effect of drought stress on root exudate metabolomes and rhizosphere microbial communities of corn Collaborator: CRRI (2) Quantifying changes in corn root exudates and rhizosphere microbial communities under varying N availability Collaborator: CRRI (3) Soil and root-associated bacterial and fungal communities of Zea mays Collaborators: Julie Shaffer & Paul Twigg (UNK), CRRI
The role of microbial diversity in ecological restoration
We are investigating how soil microbial communities contribute to ecosystem restoration success. By studying the role of microbial diversity and function in recovering degraded landscapes, our research aims to assess how specific plants foster microbial communities that enhance soil fertility and facilitate plant establishment.
Current projects (1) Estimating landscape-level contributions in EGS from the Conservation Reserve Program in Nebraska Collaborators: Wuellner, Reichart, Jonas-Bratten (UNK), and Uden, Little, Roy (UNL) (2) Soil microbial responses to season-long intensive grazing Collaborators: Chris Helzer (TNC), Mitch Stephenson (UNL) (3) Recovery of soil microbial communities following manure decomposition Collaborator: Chris Helzer (TNC) (4) Effects of seed-mix diversity on microbial diversity, productivity, and soil carbon dynamics Collaborator: Chris Helzer (TNC) (5) Effects of eastern redcedar removal on soil bacterial and fungal community composition and diversity Collaborator: Sarah Bailey (PPRI)
Microbial mediators of pigweed invasion We are investigating how soil microbial communities contribute to the establishment and spread of pigweed (Amaranthus spp.) invasions. Our research aims to uncover whether shifts in microbial diversity play a role in enhancing pigweed's competitive advantage.
Current projects (1) Response of soil bacterial and fungal communities to Amaranthus retroflexus & palmerii in Zea mays Collaborators: Julie Shaffer & Paul Twigg (UNK), CRRI (2) Potential shifts of AM fungal dominance associated with invasion of redroot pigweed in corn fields Collaborators: CRRI, USDA
Soil microbial dynamics amidst widespread tree decline
North American landscapes are being transformed by widespread tree decline and mortality caused by an increase in drought, fires, and pest outbreaks. We are interested in how tree loss following these disturbance events alters soil microbial communities, soil biogeochemical processes, and ultimately the recovery of these forests.
Current projects (1) Fungal community responses to hemlock woolly adelgid infestation Collaborators:Serita Frey (UNH), David Orwig (Harvard Forest)