November 15, 2022

Imani's poster was titled, "Development of a high throughput method for quantifying Batrachochytrium dendribatidis".

Caitlin's talk was titled, "Bugs and Bd: Aquatic Macroinvertebrates as Potential Bd Reservoirs in East Bay, CA".

Both were a success!

November 14, 2022

Imani's project is titled, "Investigating immunogenetic diversity as a mechanism of host resilience across scales". 

Caitlin's project is titled, "Investigating the roles of aquatic macroinvertebrates in the resilience to disease in amphibians".

November 11, 2022

The paper titled, "Linking Lyme disease ecology and epidemiology: reservoir host identity, not richness, determines tick infection and human disease in California" was led by previous Briggs lab PhD alum, Dr. Andy MacDonald. An open access version of the paper can be found on Environmental Research Letters (

September 27, 2022

Pilot & Exploratory Projects (PEPs)

August 25, 2022

Her full dissertation can now be found on Google Scholar

June 28, 2022

The paper titled "Metabolites from the fungal pathogen Batrachochytrium dendrobatidis (bd) reduce Bd load in Cuban treefrog tadpoles" is a product from her undergrad work at U of Tampa. Congrats, Caitlin!

June 03, 2022

The Shoreliners' Broida-Hirschfelder Graduate Fellowship program is administered by the UCSB Graduate Division, and two recipients are selected by a UCSB Shoreliners selection committee. The UCSB Faculty Women's Club Broida-Hirschfelder Fellowship was first awarded in 1992. It was endowed by Ina Broida and Betty Hirschfelder, both long-time active members of the UCSB Faculty Women's Club. 

June 03, 2022

The award is made possible by Arthur Copeland, their family, and friends, and is given annually to an outstanding student in the biological sciences, to perpetuate the memory of Audrey Lynn Copeland and her appreciation of nature, enthusiasm for life, and enjoyment of her UCSB experience.

May 27, 2022

The pair will work on the project titled, "Elucidating the roles of aquatic invertebrates in amphibian pathogen dynamics".


May 26, 2022

Tatum's CCUT portfolio received high praises from anonymous reviewers such as: 

  • "... one of the most effective & engaging portfolios I have read. No wonder you are such an effective & engaging instructor." (Reviewer 3)
  • "... one of the best portfolios I have reviewed" (Reviewer 4)

We're not surprised by any of this! 


April 29, 2022

Titled, "Detection and isolation of Rickettsia tillamookensis (Rickettsiales: Rickettsiaceae) from Ixodes pacificus (Acari: Ixodidae) from multiple regions of California" is now out in the Journal of Medical Entomology

April 28, 2022

The project title is "Vector-borne Disease Risk Across Land-use Gradients in Rural Madagascar"

April 23, 2022

Titled, "ABCDE: Amphibian Batrachochytrium dendrobatidis Causes Devastating Extinctions"

April 23, 2022

Titled, "The effects of elevated temperatures associated with urbanization on Bd-zoospore grazing ability in Daphnia magna"

April 23, 2022

Titled, "Fieldwork: Collecting genetic samples to study disease dynamics between Batrachochytrium dendrobatidis and Amphibians"

April 23, 2022

EEMB held it's first undergraduate research symposium where Briggs lab undergrads Elise Cypher, Nuzha Baksh, & Navdeep Sandhu showcased their exciting research! Special thanks to the event organizers, including Caitling Nordheim, for putting on a great department event.


March 20, 2022

She will be looking at tick dynamics across restoration gradients in the backyard of UCSB at Coal Oil Point and North Campus Open Space.

March 16, 2022

Her previous quarter teaching Biometry remotely received glowing reviews and we're sure it will be the same this upcoming quarter!

February 22, 2022


December 08, 2021

The Nejat B. Ezal Fellowship Fund honors the memory of Nejat Ezal, a first year Ph.D. student in Marine Biology at UCSB in the early 1990's with an essay competition. 

November 19, 2021

The proposal titled "Direct and indirect impacts on tick-borne disease risk from historic fire events" will revisit 4 UC natural reserves that experienced fire in the fall of 2020. 

November 05, 2021

The poster titled "Endemic lineages of Batrachochytrium dendrobatidis are associated with reduced chytridiomycosis-induced mortality in amphibians: evidence from a meta-analysis of experimental infection studies" was co-authored with Anat Belasen, Molly Bletz, Kelly Zamudio

October 01, 2021

NSF funds $12.5 million for a new research collaboration to study species’ resilience to infectious disease.


Working from UC Santa Barbara and from UCSB’s Sierra Nevada Aquatic Research Laboratory in Mammoth Lakes, co-principal investigators Cherie Briggs, Roland Knapp and Thomas Smith will focus their efforts on understanding factors driving amphibian resilience in California’s Sierra Nevada mountains, one of four ecosystems the institute will study.

October 01, 2021

Since 2018 

August 04, 2021

Imani was awarded an NSF scholarship and EEB Block grant to offset some of the costs of attending.

August 02, 2021
  • Tatum gave an oral presentation titled "Can we predict chytrid outbreaks without touching frogs?: a Bayesian approach.". Co-authored with Wendy Meiring and Cherie Briggs.
  • Kacie won best poster in the ESA Disease Ecology section titled "Lizard feeding enhances Ixodes pacificus vector competency to Borrelia burgdorferi" Co-authored with Lisa Couper, Anne Sapiro, Fauna Yarza, X. Frank Yang, Keith Clay, Chase Mateusiak, Seemay Chou, and Andrea Swei. 
July 20, 2021

with the help of Kana Suzuki, Iona McCabe, Max Roberts, Elise Cypher, and Nuzha Baksh, to work with Mountain Yellow-legged frogs!


Check out the gallery images taken by Max Roberts to be transported to the high sierras.

June 14, 2021

The title of her work "From specialist to generalist: a community ecology approach to understanding the disease dynamics of the amphibian-killing pathogen Batrachochytrium dendrobatidis" was presented via poster during the 18th Ecology and Evolution of Infectious Diseases Conference located at Infectious Diseases Research Institute of Montpellier, France.


Co-authors include Mark Wilber and Cherie Briggs

June 09, 2021


June 01, 2021

The research proposal was titled "Quantifying tick-borne disease risk across a spatiotemporal gradient".

May 11, 2021

Funded work is for field research on Mountain Yellow-legged frogs in the Eastern Sierras

May 11, 2021

The grant titled "Quantifying tick-borne disease risk across a spatiotemporal gradient in California" will collaborate with Andy MacDonald (UCSB Bren), Megan Saunders (California Department of Public Health), and local vector control agencies including Brian Cabrera at Santa Barbara County Vector Control to build an eco-epidemiological model of tick-borne disease risk throughout the state. 


News link can be found here:

December 02, 2020

The research project titled "Transmission dynamics of tick-borne pathogens across a latitudinal gradient" will take Sam to 11 UC Natural Reserves in 20201.

Highlighted in this article:

June 15, 2020

Kana Suzuki '21 - congrats on the double nomination!

June 15, 2020

Their work is featured in the “Friends of Sedgwick” August 2019 newsletter (


Kana Suzuki '21

December 11, 2019


December 04, 2019

Cherie was recognized for her "distinguished contributions to the field of disease ecology".

News article highlighting Cherie can be found here:

December 04, 2019

The proposal titled "Genetic drivers of host susceptibility and pathogen virulence in the chytrid-frog system across California" will take Imani to a multitude of reserves ranging from Mendocino to Mojave.

Her work is highlighted in the newsletter that can be found here:

October 15, 2019

The paper titled "Widespread chytrid infection across frogs in the Peruvian Amazon suggests critical role for low elevation in pathogen spread and persistence" was featured in Michigan News (


The article is linked here:

June 12, 2019

The grant titled "From specialist to generalist: a multidisciplinary approach to broadening our understanding of biotic and abiotic reservoirs of emerging fungal pathogens" was funded by National Institute of Health (NIH) Ecology and Evolution of Infectious Diseases for $2,383,00 to Cherie Briggs, Tatum Katz, Renwei Chen, Michelle O'Malley, Taegan McMahon, and Pieter Johnson.

December 04, 2018

Congratulations to undergraduate Yanelyn Perez on being accepted into the prestigious McNair Scholar Program!

October 04, 2018

Grace just published an article in Ecological Applications titled, Eco‐evolutionary rescue promotes host–pathogen coexistence! Congratulations!

Read more about her article at The Current and Discover Magazine!

December 08, 2017

Mark Wilber successfully defended and is officially Doctor Mark Wilber!

September 01, 2017

Our newest grad, Tatum Katz, was awarded a 2017 Mellichamp Fellowship in Systems Biology and Bioengineering by the Mellichamp Chairs in Systems Biology and Bioengineering. Congratulations Tatum!

November 30, 2016

Just accepted: Tom, Roland Knapp, and Angela Picco’s manuscript describing the presence of ranaviruses in mountain yellow-legged frogs (both Rana muscosa and R. sierrae), and its probably small contribution to overall Sierra Nevada frog declines, has been accepted for publication in Herpetological Biology and Conservation. Stay tuned: the article will appear in the open-access journal sometime in spring 2017.

October 19, 2016

The Mountain yellow-legged frog is on the cover of the October issue of Methods in Ecology and Evolution. This issue features Mark and Cherie’s article on using Integral Projection Models for modeling host-parasite systems.

October 06, 2016

October 03, 2016

Roland was interviewed by UCSBs The Current

August 01, 2016

Cherie Briggs was elected Fellow of the Ecological Society of America. For more information, click here.

June 01, 2016

Tom, Cherie, and Roland just published an article in Ecosphere titled Declines and extinctions of mountain yellow-legged frogs have small effects on benthic macroinvertebrate communities. You can check out the full article here.

June 01, 2016

Congratulations to Mary and Nathan who received the Worster Award to conduct dual graduate/undergraduate research this summer. They will conduct an experiment at the Sierra Nevada Aquatic Research Laboratory that examines correlations between environmental factors of multiple lakes invaded by Bd, and the outcome of the Mountain Yellow-Legged Frog population in each lake (persistence or die-off).

March 14, 2016

Andy and Tom both received post-docs! Andy is going to be working with Erin Mordecai on malaria at Stanford University and Tom is going to be working with Brian Halstead on garter snakes in the Sierra Nevada. Congratulations guys!

February 26, 2016

Mary is presenting her work on the reasons for persistence of Bd-infected Rana muscosa populations at the Mathias Symposium Saturday Feb. 26. Her talk is titled Genetic and environmental drivers for host population persistence vs. die-off in the face of pathogen invasion. More about the symposium and the UC Natural Reserve system can be found here.

January 28, 2016

Cherie was a member of a working group that published this report on how to manage the salamander chytrid fungus Batrachochytrium salamandrivorans in the United States.

December 16, 2015

TomCherie, and Roland Knapp’s manuscript Declines and extinctions of mountain yellow-legged frogs (MYLFs) have small effects on benthic macroinvertebrate communities has just been accepted for publication in Ecosphere! Stay tuned for a link to the published article!

December 01, 2015

Andy and Cherie just published a paper titled Truncated seasonal activity patterns of the western blacklegged tick (Ixodes pacificus) in central and southern California looking at the “patterns of seasonal activity and density of host-seeking western blacklegged ticks” in Southern California. Check out the paper here.

November 13, 2015

Cherie is a coauthor on a new paper looking at Bd immunity in Rana muscosa. The paper is titled Mountain Yellow-legged Frogs did not Produce Detectable Antibodies in Immunization Experiments with Batrachochytrium dendrobatidis and you can read more about it here.

September 16, 2015

MarkSara, and Cherie had their paper on methods for detecting parasite-induced host mortality from parasite intensity data accepted at the International Journal of Parasitology. You can check out an unofficial version of the paper here.

August 31, 2015

AndreaMary, and Cherie published a paper quantitatively evaluating the different methods used for detecting Batrachochytrium dendrobatidis in museum specimens. Check out the paper here.

August 20, 2015

Cherie just published a paper in Science which defines a general consumer-resource model, applicable to most (if not all) known consumer-resource interactions. You can check out the article here. For a nice summary check out the press release here.

August 15, 2015

Cherie, Andy, and Mark all gave talks at ESA. Check out the program here. Follow up blog post coming soon!

May 25, 2015

Briggs Lab undergraduates Jacob and An presented their research at the Undergraduate Research and Creative Activities session. Jacob was looking the effects of invasive trout on insect body size distributions in Sierra Nevada Lakes and An was looking at predator avoidance in Pacific Tree Frogs. Congratulations you two!

May 01, 2015

CherieMary, and Mark are coauthors on a paper just published in Frontiers in Ecology and the Environment titled Context-dependent conservation responses to emerging wildlife diseases. Check it out here!

March 15, 2015

Congratulations to Mark who advanced candidacy!

March 01, 2015

Mark’s paper titled Scale collapse and the emergence of the power law species-area relationship was just accepted for publication at Global Ecology and Biogeography.

January 16, 2015

Tom completed his dissertation defense! He gave an excellent talk on his research examining the response of Sierra Nevada aquatic communities to Bd-induced extinction events of Mountain Yellow-legged Frogs. Congratulations Tom!

December 11, 2014

Andrea completed her dissertation defense! She gave an excellent talk on her research involving the interaction between Bd and the amphibian microbial community. Congratulations Andrea!

October 21, 2014

Andrea J. and Cherie’s paper examining the influence of Bd on amphibian microbial communities was just accepted and the Proceeding of the National Academy of Science (PNAS). Congrats!

October 08, 2014

Check out Cherie’s new paper titled “Experimental evolution alters the rate and temporal pattern of population growth in Batrachochytrium dendrobatidis, a lethal fungal pathogen of amphibians”. You can find the pdf here.

October 04, 2014

Congratulations to Andrea who received the UCSB Shoreliners’ (Formerly Faculty Women’s Club) Broida-Hirschfelder Award by Shoreliners. She is pictured here receiving the award from UCSB Shoreliners’ president Claudia Chapman on October 3.

August 21, 2014

Congrats to Andy for passing his orals!

August 16, 2014

Emily, Mark, and Tom all gave successful and informative talks at the Ecological Society of America meeting. Click here for the full program. It was a great conference; full of ecology, networking and libations.

July 18, 2014

Mark received the Mellichamp Graduate Student Fellowship

July 17, 2014

He will be working with first generation, low income, minority students planning to attend graduate school. See more about the program here.

July 14, 2014

Jose Guerro, a high school student that Andy mentored last summer received a Gates Millennium Fellowship (full tuition and stipend for the duration of an undergraduate degree) to attend UCLA.

July 11, 2014

The paper is titled “Lyme disease risk influences human settlement in the wildland-urban interface: evidence from a longitudinal analysis of counties in the northeastern United States”. In this paper, we show that human populations respond to Lyme disease risk through settlement decisions, and in so doing identify a statistical problem common in previous analyses exploring the link between habitat fragmentation and human Lyme disease incidence. Proofs are back, just waiting to see it in print at this point.

June 26, 2014

Checkout out a bit about the award and Andrea’s work here.

May 23, 2014

Cherie and Andrea J.’s preproposal on chytrid microbe interactions was accepted!

May 06, 2014

Congratulations Jacob and Mark!

May 03, 2014

Congratulations Emily!