Quantifying the vulnerability of Arctic water supply lakes through paleolimnological assessment: The case of Igloolik, Nunavut, Canada ...
Anthropogenic stressors to freshwater environments have perpetuated water quality and quantity challenges for communities across Arctic Canada, making drinking water resources a primary concern for northern peoples. To understand the ecological trajectory of lakes used as freshwater supply, we condu...
| Main Authors: | , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | unknown |
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SAGE Journals
2021
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| Online Access: | https://dx.doi.org/10.25384/sage.c.5355096 https://sage.figshare.com/collections/Quantifying_the_vulnerability_of_Arctic_water_supply_lakes_through_paleolimnological_assessment_The_case_of_Igloolik_Nunavut_Canada/5355096 |
| Summary: | Anthropogenic stressors to freshwater environments have perpetuated water quality and quantity challenges for communities across Arctic Canada, making drinking water resources a primary concern for northern peoples. To understand the ecological trajectory of lakes used as freshwater supply, we conducted a paleolimnological assessment on two supplemental sources in Igloolik, Nunavut, Arctic Canada. A stratigraphic examination of biological indicators (Insecta: Diptera: Chironomidae) allowed for paleotemperature reconstructions with decadal and centennial resolution over the past 2000 years. Between 200 and 1900 CE, the sub-fossil chironomid community was comprised of cold-water taxa, such as Abiskomyia , Micropsectra radialis -type, and Paracladius . Reconstructed temperatures were consistent with known climate anomalies during this period. A rapid shift in the composition of the chironomid assemblages to those with higher temperature optima ( Chironomus anthracinus -type, Dicrotendipes , and Tanytarsus ... |
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