Olivia J. Graham, PhD
@o_jgraham
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Postdoc @CornellEEB | Exploring impacts of 🐌🦠☀️🌡 on #seagrass disease ecology | she/her | #oceanoptimism
In/on/under the water
Joined October 2017
Ever wonder if herbivores help spread plant pathogens in our oceans like they do on land? 🤔. ✨Stoked✨ to share our paper @ESAEcology showing how #eelgrass herbivores facilitate transmission of seagrass wasting #disease:. (🎨: Raquel Santamaria Germani)
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Delighted to share our team’s #eelgrass work today @HopkinsMarine! . Swing by Agassiz @ 12 PM to learn about health and resilience of #eelgrass in the Northeast Pacific 🌊🌱
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RT @CornellEEB: EEB's prof emerita @DrewHarvell and her lab, part of collaborative research team showing how herbivores like sea snails can….
news.cornell.edu
Cornell plant and computer science experts joined forces to show how herbivores like sea snails can promote the spread of seagrass wasting disease. Grazing by small herbivores was associated with a...
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Finally, delighted my photo made the cover of this month's @ESAEcology issue! So glad #eelgrass is getting some love 🥰
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Terrific collab on these papers! 🙌.@ocean_Critter @deannabeatty @ginnyeckert_ak @brendanh0gan @timlhawthorne @HessingLewis @PrenticeCarolyn @fionatomasn @BoYangGeo @DrewHarvell @JEmmettDuffy.@CornellEEB @AtkinsonCenter @CornellCIS.@MarineBiol_FHL @SmithsonianEnv.
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Overall, these papers show impacts of herbivores on disease dynamics in eelgrass. They highlight how biological processes can have ecosystem-level impacts (ex: disease outbreaks). Understanding these processes can help us determine why meadows respond differently to stressors!
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The second, led by @lillian_aoki, shows herbivore grazing was associated w +29% disease prevalence in meadows from AK to southern CA, USA. Herbivore presence—and type of herbivore—are important in influencing eelgrass health.
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Our first shows the role of herbivores in facilitating disease transmission via grazing scars. We also demonstrate that herbivores have different feeding preferences (for diseased or healthy eelgrass).
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Thanks to @CornellNews for featuring our team’s recent 2 papers in @ESAEcology on the role of eelgrass herbivores in seagrass wasting disease dynamics!.🌊🌱🐌🦠.
news.cornell.edu
Cornell plant and computer science experts joined forces to show how herbivores like sea snails can promote the spread of seagrass wasting disease. Grazing by small herbivores was associated with a...
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What do you get when you combine:.🖥️ scientists.🌊 ecologists.🌱🐌🦠 #eelgrass, herbivores, and a pathogen?. Latitudinal-scale studies showing the impact of marine herbivores on plant pathogen transmission! 😲. Terrific collab with many partners 👏 @CornellCIS @CornellEEB.
An team from @CornellCAS, @CornellCALS and @CornellCIS joined forces to show how herbivores like sea snails can promote the spread of seagrass wasting disease.
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RT @SImarineGEO: Passionate about marine biology, travel, and working with amazing people? We are #hiring two positions: a technician to h….
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Want to learn about Marine #DiseaseEcology? 🌊🦠. Apply to take a training workshop @MarineBiol_FHL (June 11-July 2, 2025) with Dr. Maya Groner! 😁. Generous scholarships available! 💸. Apps due Feb. 1 ⏰. Check it out: 👀.
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Our paper was published in Environmental Microbiology 1 yr ago (but I was in Costa Rica at the time). Better late than never to share it! 😅. If you have trouble accessing it, please DM me! 📨.
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Big thanks to my terrific co-authors and contributors! 👏. 🦠dream team: @eadamczyk8 @SiobhanSchenk Laura Parfrey. 🔴 13 @cornellCALS undergrad co-authors, who helped run the experiments. Go, Big Red!. 🙌 @DrewHarvell @cornellEEB @cornellCSCU @MarineBiol_FHL.
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Between diseased and asymptomatic eelgrass from a natural meadow, bacterial composition and richness varied in one of the two years. This suggests that the influence of disease on the eelgrass microbiome may vary with environment. 🌊☀️
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1) Eelgrass with an *intact* microbiome had higher disease levels compared to eelgrass with an experimentally altered microbiome 🤯. This was the *opposite* of what we'd expected and does not show a protective role of the eelgrass microbiome against disease.
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So, we embarked on a quest to better understand how the #eelgrass microbiome influences seagrass wasting disease interactions. Here are a few key takeaways: 💡.
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Microbiomes can have outsized impacts on plant and animal health. 🦠. We're learning more about bacteria living on #seagrass leaves, but there's still much to explore about how they interact with pathogens.
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Does the eelgrass #microbiome protect against disease? . Does the microbiome vary between diseased and asymptomatic eelgrass? 🤔. My team explored these questions via experiments and field surveys at @MarineBiol_FHL. Check it out!.. (🎨: Sylvia Heredia)
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RT @DrewHarvell: IceIce disease is lower on algal farms with seagrass. Congrats to our team @JoleahLamb, @EvanFiorenza , NurAbu, @Atkinson….
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