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Browsing Datasets by Author "Korosi, Jennifer"
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Item Open Access Dataset: Climatic Drivers of Limnological Change in Iqallukvik Lake, Tuktoyaktuk, Northwest Territories, Canada(2022) Gruia, Sorin-Alexandru; Thienpont, Joshua; Coleman, Kristen; Korosi, JenniferItem Open Access Limnology and diatom ecology of shallow lakes in a rapidly thawing discontinuous permafrost peatland(2023-01-01) Coleman, Kristen; Korosi, JenniferLimnological data for small, shallow lakes at or near the Scotty Creek Field Station near Fort Simpson, Northwest Territories, Canada. It includes: (1) surface water chemistry and subfossil diatom (Bacillariophyta) assemblages in 16 lakes at or near Scotty Creek collected in mid-July, 2018; (2) high-resolution logger data for depth, oxygen, light, and temperature profiles over the 2019 ice-free season in First Lake and Goose Lake at the Scotty Creek Research Station; (3) buffer and overlay landscape analysis of fen and collapse scar area within a 250 m buffer of lake shorelines for 9 lakes in the Scotty Creek basin; (4) Water chemistry and subfossil diatom assemblages in wetlands and substrate samples (submerged vegetation, submerged peat, sediment, and grasses) from shoreline environments around Goose Lake, collected in June, 2019. Data accompanies Kristen Coleman’s PhD dissertation (York, Geography).Item Open Access Long-term ecological change in Lake Scugog (Ontario) inferred from lake sediment cores: Current ecosystem changes in Lake Scugog evaluated in an historical context.(2023-02-15) Korosi, Jennifer; Thienpont, Joshua; Adano, Randelle; Do, Pham Ha Phuong; Jeyarajah, JanujaIn 2017, the Scugog Lake Stewards were awarded an Ontario Trillium Foundation Grow Grant to study the ecology of Lake Scugog, to provide insights into ecosystem stressors that present a challenge to walleye conservation and lake restoration. As part of this, York University initiated a paleolimnological study, led by Profs. Korosi and Thienpont, to document the ecological changes that have occurred in Lake Scugog since it was formed in the mid-19th century following the construction of the Lindsay Dam. Sediment cores were collected from two locations: (1) the deepest point of the eastern arm of the lake, and (2) near the town of Port Perry. The original objective of this study was to infer long-term trends in lake habitat, food web structure, thermal regime, productivity, and oxygen using fossil remains of three different groups of ecological indicators (diatoms, chironomids, and Cladocera) and nitrogen stable isotopes. A secondary objective, to infer long-term trends in cyanobacteria in Port Perry Bay was added to the project after Microcystis blooms were documented in 2017 by Ontario Tech University.Item Open Access Water chemistry and sediment core data from small, shallow lakes of the Taiga Plains (Northwest Territories, Canada)(2025) Korosi, Jennifer; Coleman, Kristen; Thienpont, Joshua; Palmer, MichaelLake browning has been widely projected for northern lakes affected by permafrost thaw, but the inherent heterogeneity in permafrost landscapes coupled with a paucity of data for many regions makes it challenging to develop circumpolar-scale assessments. This dataset provides surface water chemistry from 35 small, shallow (0.5-3 m) lakes in discontinuous permafrost peatlands of the Taiga Plains (Northwest Territories, Canada), which were distributed across two Level IV ecoregions (Cameron Uplands, Tathlina Plain). This dataset also provides a comparison subfossil diatom assemblages between present-day (2012-2018) and ~1850 in 23 Taiga Plains lakes distributed across three Level IV ecoregions (Cameron Uplands, Tathlina Plain, South Mackenzie Plain).