Quantifying the Vulnerability of Arctic Water Supply Lakes to Environmental Change Through Paleolimnological Assessment
Anthropogenic stressors to freshwater environments have perpetuated water quality and quantity challenges for northern communities across Arctic Canada, making drinking water resources a primary concern for Arctic populations. To understand the ecological trajectory of freshwater supply sources, we...
Main Author: | |
---|---|
Other Authors: | |
Format: | Thesis |
Language: | English |
Published: |
Université d'Ottawa / University of Ottawa
2020
|
Subjects: | |
Online Access: | http://hdl.handle.net/10393/41488 https://doi.org/10.20381/ruor-25712 |
id |
ftunivottawa:oai:ruor.uottawa.ca:10393/41488 |
---|---|
record_format |
openpolar |
spelling |
ftunivottawa:oai:ruor.uottawa.ca:10393/41488 2023-05-15T14:48:12+02:00 Quantifying the Vulnerability of Arctic Water Supply Lakes to Environmental Change Through Paleolimnological Assessment Cincio, Paige Wesche, Sonia Darienne 2020-11-20 application/pdf http://hdl.handle.net/10393/41488 https://doi.org/10.20381/ruor-25712 en eng Université d'Ottawa / University of Ottawa http://hdl.handle.net/10393/41488 http://dx.doi.org/10.20381/ruor-25712 Paleolimnology Climate change Arctic Vulnerability Chironomidae Freshwater supply Thesis 2020 ftunivottawa https://doi.org/10.20381/ruor-25712 2021-01-04T14:45:24Z Anthropogenic stressors to freshwater environments have perpetuated water quality and quantity challenges for northern communities across Arctic Canada, making drinking water resources a primary concern for Arctic populations. To understand the ecological trajectory of freshwater supply sources, we conducted a paleolimnological assessment on two supplemental sources of freshwater in Igloolik, Nunavut, Canada. A stratigraphic examination of bioindicators (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 community to warm-water adapted taxa (Chironomus anthracinus-type, Dicrotendipes, and Tanytarsus lugens-type) in the late 20th century was observed in both systems. Our results demonstrate that these lake ecosystems are undergoing marked transformations to warmer, more nutrient-rich environments, and suggest water sustainability pressures on freshwater and human systems will likely continue in tandem with ongoing climate change. To contextualize the influence of recent warming and elucidate the status of water resource vulnerability over the longer term, paleolimnological methods can be usefully applied as components of vulnerability assessments. Thesis Arctic Climate change Igloolik Nunavut uO Research (University of Ottawa - uOttawa) Arctic Canada Igloolik ENVELOPE(-81.800,-81.800,69.378,69.378) Nunavut |
institution |
Open Polar |
collection |
uO Research (University of Ottawa - uOttawa) |
op_collection_id |
ftunivottawa |
language |
English |
topic |
Paleolimnology Climate change Arctic Vulnerability Chironomidae Freshwater supply |
spellingShingle |
Paleolimnology Climate change Arctic Vulnerability Chironomidae Freshwater supply Cincio, Paige Quantifying the Vulnerability of Arctic Water Supply Lakes to Environmental Change Through Paleolimnological Assessment |
topic_facet |
Paleolimnology Climate change Arctic Vulnerability Chironomidae Freshwater supply |
description |
Anthropogenic stressors to freshwater environments have perpetuated water quality and quantity challenges for northern communities across Arctic Canada, making drinking water resources a primary concern for Arctic populations. To understand the ecological trajectory of freshwater supply sources, we conducted a paleolimnological assessment on two supplemental sources of freshwater in Igloolik, Nunavut, Canada. A stratigraphic examination of bioindicators (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 community to warm-water adapted taxa (Chironomus anthracinus-type, Dicrotendipes, and Tanytarsus lugens-type) in the late 20th century was observed in both systems. Our results demonstrate that these lake ecosystems are undergoing marked transformations to warmer, more nutrient-rich environments, and suggest water sustainability pressures on freshwater and human systems will likely continue in tandem with ongoing climate change. To contextualize the influence of recent warming and elucidate the status of water resource vulnerability over the longer term, paleolimnological methods can be usefully applied as components of vulnerability assessments. |
author2 |
Wesche, Sonia Darienne |
format |
Thesis |
author |
Cincio, Paige |
author_facet |
Cincio, Paige |
author_sort |
Cincio, Paige |
title |
Quantifying the Vulnerability of Arctic Water Supply Lakes to Environmental Change Through Paleolimnological Assessment |
title_short |
Quantifying the Vulnerability of Arctic Water Supply Lakes to Environmental Change Through Paleolimnological Assessment |
title_full |
Quantifying the Vulnerability of Arctic Water Supply Lakes to Environmental Change Through Paleolimnological Assessment |
title_fullStr |
Quantifying the Vulnerability of Arctic Water Supply Lakes to Environmental Change Through Paleolimnological Assessment |
title_full_unstemmed |
Quantifying the Vulnerability of Arctic Water Supply Lakes to Environmental Change Through Paleolimnological Assessment |
title_sort |
quantifying the vulnerability of arctic water supply lakes to environmental change through paleolimnological assessment |
publisher |
Université d'Ottawa / University of Ottawa |
publishDate |
2020 |
url |
http://hdl.handle.net/10393/41488 https://doi.org/10.20381/ruor-25712 |
long_lat |
ENVELOPE(-81.800,-81.800,69.378,69.378) |
geographic |
Arctic Canada Igloolik Nunavut |
geographic_facet |
Arctic Canada Igloolik Nunavut |
genre |
Arctic Climate change Igloolik Nunavut |
genre_facet |
Arctic Climate change Igloolik Nunavut |
op_relation |
http://hdl.handle.net/10393/41488 http://dx.doi.org/10.20381/ruor-25712 |
op_doi |
https://doi.org/10.20381/ruor-25712 |
_version_ |
1766319293592502272 |