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Wasting disease in Oregon seagrass beds

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https://ir.library.oregonstate.edu/concern/defaults/f1881v69q

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  • Seagrass is a keystone species that provides important habitat, erosion control, and carbon sequestration to estuarine ecosystems. However, Labyrinthula Zosterae, a parasite responsible for seagrass wasting disease, has been observed along the west coast of the US. Its negative effects on seagrass beds put many coastal and estuarine ecosystems at risk. The goal of this project was to determine if there is a seasonal pattern in the growth and spread of L. zosterae, and if so, what it is. Secondary objectives include finding other factors that have a significant contribution to the lifecycle of L. zosterae. Over the course of the project, two main sites containing seagrass beds in Yaquina Bay were monitored. Samples of seagrass blades were collected over regular sampling trips and evaluated for the presence and severity of L. zosterae. Bed density was also evaluated during each sampling trip. Through long term sampling, the prevalence of seagrass wasting disease in the chosen seagrass beds has shown a repeated seasonal pattern. A correlation between wasting disease prevalence in the bed and the severity of the disease has also been observed. While data collection and analysis is still ongoing, these results provide good background on L. zosterae’s behavior, which will give us a foundation for developing methods to reduce its spread and impact.
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