Integration of paleolimnological and contemporary hydroecological analyses to decipher effects of multiple stressors on water-rich northern landscapes
Northern freshwater ecosystems provide important habitat and resources which support abundant wildlife and waterfowl populations and the traditional lifestyle of many First Nation communities. However, concerns have been mounting regarding the effects of multiple stressors, including climate change...
Main Author: | |
---|---|
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
University of Waterloo
2015
|
Subjects: | |
Online Access: | http://hdl.handle.net/10012/9672 |
id |
ftunivwaterloo:oai:uwspace.uwaterloo.ca:10012/9672 |
---|---|
record_format |
openpolar |
spelling |
ftunivwaterloo:oai:uwspace.uwaterloo.ca:10012/9672 2023-05-15T18:19:58+02:00 Integration of paleolimnological and contemporary hydroecological analyses to decipher effects of multiple stressors on water-rich northern landscapes MacDonald, Lauren Ashley 2015 http://hdl.handle.net/10012/9672 en eng University of Waterloo http://hdl.handle.net/10012/9672 Paleolimnology Carbon Wapusk National Park Old Crow Flats Slave River Delta Thermokarst lakes Lesser Snow Goose Metals Giant Mine Biology Doctoral Thesis 2015 ftunivwaterloo 2022-06-18T23:00:32Z Northern freshwater ecosystems provide important habitat and resources which support abundant wildlife and waterfowl populations and the traditional lifestyle of many First Nation communities. However, concerns have been mounting regarding the effects of multiple stressors, including climate change and other human-related activities in these regions. In order to understand the consequences of stressors, information on both present and past conditions is needed. This thesis addresses knowledge gaps by using a combination of contemporary and paleolimnological methods to characterize lake and pond responses to different stressors in three northern landscapes. A paleolimnological record in combination with aerial images was used to investigate causes of lake-level changes at a lake in the Old Crow Flats (OCF). Contemporary measurements were used to identify how hydrological and limnological conditions of coastal ponds in Wapusk National Park (WNP) differ seasonally and with disturbance from Lesser Snow Geese (LSG). Paleolimnological studies were also used in this landscape to determine how hydroecological conditions have changed during the past few centuries in response to climate warming and LSG population expansion. At a lake in the Slave River Delta (SRD), paleolimnological studies of hydrology and contaminant deposition were used to establish baseline concentrations and assess if temporal changes have occurred in response to northern industrial development. Together, these studies provide a detailed record of environmental changes in response to stressors at three large northern freshwater landscapes. Recent studies using remote sensing analysis of lake-rich thermokarst landscapes have documented evidence of declining lake surface area in response to recent warming. However, images alone cannot identify whether these declines are due to increasing frequency of lake drainage events associated with accelerated thermokarst activity or to increasing evaporation in response to longer ice-free season duration. In ... Doctoral or Postdoctoral Thesis Slave River Thermokarst Wapusk national park University of Waterloo, Canada: Institutional Repository Old Crow Flats ENVELOPE(-139.755,-139.755,68.083,68.083) |
institution |
Open Polar |
collection |
University of Waterloo, Canada: Institutional Repository |
op_collection_id |
ftunivwaterloo |
language |
English |
topic |
Paleolimnology Carbon Wapusk National Park Old Crow Flats Slave River Delta Thermokarst lakes Lesser Snow Goose Metals Giant Mine Biology |
spellingShingle |
Paleolimnology Carbon Wapusk National Park Old Crow Flats Slave River Delta Thermokarst lakes Lesser Snow Goose Metals Giant Mine Biology MacDonald, Lauren Ashley Integration of paleolimnological and contemporary hydroecological analyses to decipher effects of multiple stressors on water-rich northern landscapes |
topic_facet |
Paleolimnology Carbon Wapusk National Park Old Crow Flats Slave River Delta Thermokarst lakes Lesser Snow Goose Metals Giant Mine Biology |
description |
Northern freshwater ecosystems provide important habitat and resources which support abundant wildlife and waterfowl populations and the traditional lifestyle of many First Nation communities. However, concerns have been mounting regarding the effects of multiple stressors, including climate change and other human-related activities in these regions. In order to understand the consequences of stressors, information on both present and past conditions is needed. This thesis addresses knowledge gaps by using a combination of contemporary and paleolimnological methods to characterize lake and pond responses to different stressors in three northern landscapes. A paleolimnological record in combination with aerial images was used to investigate causes of lake-level changes at a lake in the Old Crow Flats (OCF). Contemporary measurements were used to identify how hydrological and limnological conditions of coastal ponds in Wapusk National Park (WNP) differ seasonally and with disturbance from Lesser Snow Geese (LSG). Paleolimnological studies were also used in this landscape to determine how hydroecological conditions have changed during the past few centuries in response to climate warming and LSG population expansion. At a lake in the Slave River Delta (SRD), paleolimnological studies of hydrology and contaminant deposition were used to establish baseline concentrations and assess if temporal changes have occurred in response to northern industrial development. Together, these studies provide a detailed record of environmental changes in response to stressors at three large northern freshwater landscapes. Recent studies using remote sensing analysis of lake-rich thermokarst landscapes have documented evidence of declining lake surface area in response to recent warming. However, images alone cannot identify whether these declines are due to increasing frequency of lake drainage events associated with accelerated thermokarst activity or to increasing evaporation in response to longer ice-free season duration. In ... |
format |
Doctoral or Postdoctoral Thesis |
author |
MacDonald, Lauren Ashley |
author_facet |
MacDonald, Lauren Ashley |
author_sort |
MacDonald, Lauren Ashley |
title |
Integration of paleolimnological and contemporary hydroecological analyses to decipher effects of multiple stressors on water-rich northern landscapes |
title_short |
Integration of paleolimnological and contemporary hydroecological analyses to decipher effects of multiple stressors on water-rich northern landscapes |
title_full |
Integration of paleolimnological and contemporary hydroecological analyses to decipher effects of multiple stressors on water-rich northern landscapes |
title_fullStr |
Integration of paleolimnological and contemporary hydroecological analyses to decipher effects of multiple stressors on water-rich northern landscapes |
title_full_unstemmed |
Integration of paleolimnological and contemporary hydroecological analyses to decipher effects of multiple stressors on water-rich northern landscapes |
title_sort |
integration of paleolimnological and contemporary hydroecological analyses to decipher effects of multiple stressors on water-rich northern landscapes |
publisher |
University of Waterloo |
publishDate |
2015 |
url |
http://hdl.handle.net/10012/9672 |
long_lat |
ENVELOPE(-139.755,-139.755,68.083,68.083) |
geographic |
Old Crow Flats |
geographic_facet |
Old Crow Flats |
genre |
Slave River Thermokarst Wapusk national park |
genre_facet |
Slave River Thermokarst Wapusk national park |
op_relation |
http://hdl.handle.net/10012/9672 |
_version_ |
1766197390895742976 |