Two Centuries of Changes in Cyanobacteria Pigments & Toxins from a Lake Sediment Core from Norway Pond in Hancock, NH
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Marine, Estuarine, & Freshwater Biology
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Second Faculty Research Advisor
Third Faculty Research Advisor
Lake eutrophication and cyanobacteria blooms have been a central theme in water quality discussions, and such issues are reportedly on the rise. Lake sediments can serve as historical records for past events, revealing changes in the ecology and water quality of lakes over time. We set out to investigate cyanobacterial signatures from sediment cores to assess relative changes of cyanobacteria in Norway Pond over time. Sediment concentrations of cyanobacteria pigments (phycocyanin and phycoerythrin) and cyanotoxins (microcystins) from sediment, and sediment–water interfaces, were determined in Norway Pond. Hand-held fluorometry and Enzyme-linked Immunosorbent Assays (ELISA) were employed. Pigments and toxins were evident throughout the sediment core, with relatively higher concentrations detected from sediment core slices (0-2 cm) that represented more recent years (~0-10 years) (0.63 ug PC / g dwt, 1.63 ug PE / g dwt, 0.024 ug Chl / g dwt, and 0.81 ug MC/ g dwt). This simple approach may serve as a screening tool for evaluating historical relative abundances and toxicity of cyanobacteria from individual lakes.
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Castrucci, Austin James, "Two Centuries of Changes in Cyanobacteria Pigments & Toxins from a Lake Sediment Core from Norway Pond in Hancock, NH" (2023). Undergraduate Research Conference (URC) Student Presentations. 547.