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Assessing Changes In Freshwater And Marine Food Web Connections Following Restoration On The Penobscot River, Maine, Using Stable Isotope Analysis, Matthew Brewer Ms
Assessing Changes In Freshwater And Marine Food Web Connections Following Restoration On The Penobscot River, Maine, Using Stable Isotope Analysis, Matthew Brewer Ms
Student Scholarship
Oiadromous fish provide ecological subsidies to freshwater and marine food
webs, connecting both ecosystems. A main goal of the Penobscot River Restoration
Project was to increase connectivity between food webs by removing two mainstem
dams, improving fish passage, and reintroducing river herring through stocking.
Oiadromous fish now reach historic spawning habitat that was not accessible for
centuries. As a result, river herring runs in the Penobscot River increased from
2,336 fish in 2009 to over 3 million fish by 2018. To assess food web connectivity in
the Penobscot watershed, I analyzed stable isotopes from samples collected before
(2009-2010) and after …