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Natalie Brown kneels beside a humming wet lab setup at ���Ĺ��� University-Lock Haven, calipers in hand, measuring the promise of Pennsylvania’s streams. The master’s candidate in biology regularly tests how everyday rocks could supercharge freshwater mussel recovery in the West Branch Susquehanna River, blending her geology roots with cutting-edge experiments. 

Her work is directly supporting a landmark restoration project showing strong progress, positioning her for a breakout career in environmental science.

Freshwater mussels like the eastern elliptio are unsung heroes of aquatic ecosystems. As filter feeders, they strain plankton, sediments and pollutants from the water column, clarifying streams and creating ideal conditions for fish, invertebrates and other species to thrive. A single mussel can filter up to 15 gallons daily, but populations have plummeted — some by 90% — due to habitat loss, pollution, dams and climate pressures. Brown’s thesis targets aragonite, a calcium carbonate mineral vital for shell growth, and how local geology influences its availability.

Her research feeds into the West Branch Susquehanna River Mussel Restoration Project, a three-year, $410,000-plus initiative funded by the National Fish and Wildlife Foundation's Chesapeake WILD grant. Partners including Lock Haven, the Pennsylvania Fish and Boat Commission, Western Pennsylvania Conservancy and the Susquehanna River Basin Commission aim to reintroduce eastern elliptio, eastern lampmussel and yellow lampmussel to over 40 miles upstream of Lock Haven's Tidlow Dam, where mussels vanished due to legacy pollution from mining and industry.

Lab innovation powers real-world restoration

In a campus lab unavailable just two years ago, Brown oversees 16 meticulously crafted mesocosms — mini stream ecosystems in bins. Half feature limestone bags, a carbonate rock rich in aragonite precursors; the other half hold sandstone, which lacks them. She pumps in water sourced from nearby Buffalo and Pine Creeks, isolating variables to test her hypothesis: Limestone elevates aragonite saturation, fueling faster mussel growth and survival in restoration sites.

The experiment, now two weeks in, runs through this spring. Brown took initial measurements of shell lengths and weights using precise calipers; come May, she’ll recheck for changes. 

“This controlled setup pinpoints rock chemistry’s role — impossible in the field amid flow rates, temperature swings or invasives,” she explained. Results will inform project partners on ideal release sites, ensuring juvenile mussels from silos and hatcheries thrive.

Recent field events highlighted progress: Staff pulled mussel silos from the West Branch to measure juvenile survival and growth in real time. Early data confirms water quality has rebounded enough for reintroduction, thanks to mine remediation, reforestation and riparian buffers — a far cry from the river's "dead zone" past.

Brown amplifies her lab work with GIS analysis of decade-old Susquehanna Basin surveys spanning Pennsylvania, New York and Maryland. Patterns emerge: Carbonate-rich zones host denser eastern elliptio populations, while sandstone areas lag — directly relevant to the West Branch, once stripped bare upstream of Tidlow Dam.

Conservation faces tight budgets and timelines. “Money, resources and time limit everything,” Brown noted. Her data guides partners to limestone-heavy stretches, boosting success for the $985,000 total commitment (grant plus matches). Project tactics include infesting American eels with mussel larvae in LHU labs — eels captured downstream, glochidia from broodstock — then releasing them to spread larvae naturally.

Dan Spooner, her advisor, sourced Brown's mussels and co-built mesocosms, embodying Lock Haven’s role. “Few spots offer this space, support and proximity to restoration sites,” she said.

Conference win spotlights project momentum

Mid-experiment, Brown claimed Best Student Podium Presentation at the American Fisheries Society Pennsylvania Chapter Conference at Bucknell. She pitched mussel-fish symbiosis (eels as hosts), prior studies and her setup to 80 experts, tying into the West Branch effort.

“Validation from pros dedicated to fisheries,” she said. Built on Celebration of Scholarship talks and class projects, it unlocked data offers — stream metrics, land-use records — supercharging her GIS. “Networking beyond campus lines up collabs and jobs,” she added.

Brown’s geology bachelor’s sparked her pivot: Aragonite links rocks to shells. “It bridged my worlds,” she recalled. Lock Haven, amid ridges and creeks, equips her uniquely for projects like this.

Thesis done, Brown eyes freshwater roles at agencies, fisheries or Ph.D.s, mussels her focus. Her toolkit — lab skills, GIS, networks — aligns perfectly with West Branch goals: Self-sustaining beds enhancing resiliency, water quality and habitat.

As climate acidifies waters, dropping aragonite, Brown's work that's woven into this flagship project offers geology-based hope. From campus bins to river silos, she proves higher ed at ������ University turns passion into restoration revolutions, one filter-feeding hero at a time.