Researchers seek to understand the impact of dam modification at Jasper Ridge Biological Preserve on the community composition and diversity of ectomycorrhizal (EM) and arbuscular mycorrhizal (AM) fungal communities that associate with Willows (Salix spp.). The team newly developed an automated microbial collection trap to couple collection of biological specimens with environmental data (temperature, pressure, humidity). This research plans to establish a baseline of mycorrhizal fungi and bacterial diversity, with potential to continue the study by monitoring changes following willow recovery over the next decade.

Research Questions and Objectives:

1. What is the current baseline composition of ectomycorrhizal (EM), arbuscular mycorrhizal (AM) fungal spores and mycorrhizal helper bacteria (MHB) within willow patches near the dam?

2. How does dam removal at Jasper Ridge affect the abundance and composition of microbial diversity in the ecosystem?

3. What are the immediate impacts on the mycorrhizal and MHB communities following willow removal?

4. How do changes in spore dispersal patterns influence the re-establishment potential of willows in a post-dam landscape?

5. What long-term shifts in fungal and bacterial community dynamics can be expected over a 5- to 10-year period following the restoration efforts?

As dual (EM and AM) mycorrhizal hosts, willows play a critical role in riparian ecosystems, stabilizing soils and enhancing nutrient cycling. The planned removal of willows during the dam clearance presents the opportunity to assess the baseline composition and diversity of the aerial and soil mycorrhizal community prior to disruption. Researchers aim to elucidate the role of spore dispersal dynamics on plant recovery and restoration efforts.

The team learns they are inaugural recipients of the Morgenthaler-Chiariello Grants for Research.