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Paleoproductivity Of Late Holocene Lake Huron, Jamal Khaled Nigim

Electronic Thesis and Dissertation Repository

The paleolimnology of North America’s Lake Huron is described using lead-210 dating, mineralogy, magnetic susceptibility, total organic carbon (TOC), total nitrogen (TN), carbon:nitrogen (C/N) ratio, grain size, and the δ¹³C_OM and δ¹⁵N_TN of organic matter. Sediment cores from Lake Huron’s 6 depositional basins and Georgian Bay span the Medieval Warm Period, Little Ice Age, and Canadian-European settlement. The main organic matter source is lacustrine algae, as indicated by δ¹³C_OM, δ¹⁵N_TN and C/N. Prior to the 19th century, primary production changes are reflected only by small variations in …