Research Overview

Using bioinformatics, I integrate across -omics approaches to address eco-evolutionary questions related to microbe-microbe, microbe-host and microbe-environment interactions. I have expertise working with a variety of research systems ranging from sea to summit and with projects addressing questions about symbiosis, biogeography, land-to-sea transitions, community assembly, and characterization of understudied lineages (e.g. marine fungi).

Photo of seagrass

Environmental drivers of the seagrass microbiome

A series of projects investigating the potential biotic and abiotic drivers of microbiome assembly in seagrass beds including observing (1) differences across locations within a seagrass patch, (2) differences related to proximity to a marina and (3) succession during ammonification.

Photo of Cassie holding a core containing seagrass; Photo credit: Katy Dynarski

Seagrass-associated fungi

Not a lot is known about the diversity of marine fungi or what role fungi might play in associations with marine plants. This project seeks to survey the taxonomic and functional diversity of seagrass associated fungi and to determine the evolutionary and ecological importance of these associations.

Photo of CA wildflowers; Photo credit: Andrew Latimer

Grassland plant microbiomes

I am collaborating with Dr. Marina LaForgia, a postdoc at UC Davis, to study below-ground plant-microbe feedback loops during competition between native wildflowers and invasive grass species in California grasslands across varying precipitation regimes.

Photo of a crab

Land crab microbiomes

I am collaborating with Dr. Victoria Watson-Zink, a postdoc at Stanford University, to study the gut microbiomes of crabs across a gradient of terrestriality. We are interested in looking for patterns of co-evolution and convergent evolution in the gut microbiomes of land crabs.

Photo of phoronids taken by Ken-ichi Ueda; https://www.flickr.com/photos/ken-ichi/

Phoronid microbiomes

Phoronids are a tiny (~12 species) phyla of marine invertebrates that live inside protective chitinous tubes in the sediment. We sampled phoronids found inside and outside of seagrass beds to investigate their microbiome.

Photo of glassy-winged sharpshooter taken by Beatriz Vindiola

Glassy-winged Sharpshooter

The glassy-winged sharpshooter is a xylem feeding leafhopper, invasive to California and an important agricultural pest. We are working on genome improvements, as well as investigating mechanisms that might lead to insecticide resistance.

Photo of cicada taken by Katja Shulz; https://flickr.com/photos/86548370@N00/34795761016

Insect-associated fungi

Fungi have important roles as insect pathogens and symbionts. Using -omics, we begin to understand the biology behind complicated insect-microbe interactions.

Photo of Antartic sampling provided by Claudia Coleine.

Viruses from extreme environments

Viruses are some of the most prevalent entities on our planet, yet we know relatively little about their diversity. We searched metagenomic data from extreme environments to generate viral catalogs for future ecological work.

Photo of Arkashin Shurf, Kamchatka, Russia taken by Russell Neches; https://www.flickr.com/photos/rneches/

Miscellaneous projects

Currently these include (1) recovery of metagenome-assembled genomes (MAGs) from hot springs in Russia and (2) MAGs from aquariums, and (3) genomics of plant-associated bacteria.

Recent publications

Mycobiome and microbiome of sharpshooters

Our paper, "Geographical survey of the mycobiome and microbiome of Southern California glassy-winged sharpshooters. ", is now published in mSphere.

Metagenomic insight into invasion-driven shifts in the rhizosphere

Our paper, "Invasive plant species interact with drought to shift key functions and families in the native rhizosphere", is published in Plant and Soil.