Researchers including Manchester University’s Dr. Sabrina Brown reconstruct environmental history of Yellowstone’s geyser basins
A study including work from a Manchester University professor reveals how climate and hydrothermal activity have shaped the vegetation, wildfire and aquatic ecosystem history of the Yellowstone Plateau over the past 15,000 years. The results of the National Science Foundation-funded project were published this week in the journal Proceedings of the National Academy of Sciences. Sabrina Brown, assistant professor of biology and environmental studies at Manchester University, has spent the last decade conducting research in the Greater Yellowstone Ecosystem. Her interest in Yellowstone National Park’s Lower Geyser Basin began in 2020 when she analyzed sediment samples from Goose Lake, noticing alongside coauthors Cathy Whitlock and Chris Schiller that its contents differed from those in lakebeds in other parts of the park, suggesting that distinct geologic factors may have influenced the lake’s evolution. Collaborators on the project included scientists from Montana State University, the U.S. Geological Survey, Oregon State University, Manchester University and Colorado State University. In this study, the team collected core samples from small lakes of different ages in the Lower Geyser Basin, which is Yellowstone’s largest geyser system. The lakes are closed, meaning that they have no inflowing or outflowing streams. Pollen records from the lakes indicate that after the ice receded, a grassy steppe ecosystem developed on the rhyolite volcanic soils. Steppe was replaced by a lodgepole pine forest that established between 12,800 and 11,000 years ago. Despite subsequent changes in climate, these pine forests have changed little in composition, leading the authors to suggest that lodgepole pine will continue to […]




