Shallow lake response to Holocene climate variation in south-central Minnesota, USA

Sedimentary deposits in lakes across the upper Midwest record the co-evolution of climate and biogeochemistry since the retreat of the Laurentide Ice Sheet at the end of the last glacial period. Here, we report on a Holocene lake sediment record from Chub Lake, a shallow (3 m depth) eutrophic lake s...

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Bibliographic Details
Published in:Holocene (Sevenoaks) 2024-11, Vol.34 (11), p.1521-1533
Main Authors: Tennent, E Rae, Maxbauer, Daniel P, Umbanhowar, Charles E
Format: Article
Language:English
Subjects:
Aquatic environment
Archives & records
Biogeochemistry
Carbon isotopes
Carbonate minerals
Carbonates
Charcoal
Climate
Climate change
Coevolution
Eutrophic lakes
Eutrophication
Glacial periods
Glaciation
Glaciers
Holocene
Humid climates
Hydrology
Ice ages
Ice sheets
Isotopes
Lake sediments
Organic matter
Sediment
Sediment deposits
Silica
Water depth
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Summary:Sedimentary deposits in lakes across the upper Midwest record the co-evolution of climate and biogeochemistry since the retreat of the Laurentide Ice Sheet at the end of the last glacial period. Here, we report on a Holocene lake sediment record from Chub Lake, a shallow (3 m depth) eutrophic lake system in south-central Minnesota. High-resolution elemental data from scanning XRF along with variations in organic matter, carbonate minerals, clastic material, biogenic silica, charcoal, and carbon isotopes reveal internally consistent patterns of hydroclimatic influence on this shallow lake system from 11,300 years BP to present. In particular, authigenic carbonate mineral formation and preservation in Chub Lake appears to be well suited as a moisture proxy beginning around 9700 BP up until ∼2300 BP, when a combination of more humid climates and basin-infilling change the hydrology of Chub Lake. This work emphasizes the importance of evaluating shallow lake sediment records both as important archives of climate proxies and case studies on how changing climates impact aquatic systems.
ISSN:0959-6836
1477-0911
DOI:10.1177/09596836241266426