Limnology and paleolimnology of adjacent High Arctic lakes with an emphasis on terrestrial-aquatic linkages: Cape Bounty, Melville Island, Nunavut
Thesis (Ph.D, Geography) -- Queen's University, 2011-10-26 09:34:01.144 Our knowledge of how Arctic freshwater ecosystems will respond to continued climate change and variability is fundamentally limited by logistical difficulties of such remote research, resulting in relatively sparse long-ter...
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ftqueensuniv:oai:https://qspace.library.queensu.ca:1974/6851 2024-06-02T08:01:38+00:00 Limnology and paleolimnology of adjacent High Arctic lakes with an emphasis on terrestrial-aquatic linkages: Cape Bounty, Melville Island, Nunavut Stewart, Kailey Amanda Geography Lamoureux, Scott F. 2011-10-26 09:34:01.144 application/pdf http://hdl.handle.net/1974/6851 eng eng Canadian theses http://hdl.handle.net/1974/6851 This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner. Lipids Paleolimnology Organic Geochemistry Limnology Paired-Watershed Diatoms Climate Change Arctic thesis 2011 ftqueensuniv 2024-05-06T10:47:33Z Thesis (Ph.D, Geography) -- Queen's University, 2011-10-26 09:34:01.144 Our knowledge of how Arctic freshwater ecosystems will respond to continued climate change and variability is fundamentally limited by logistical difficulties of such remote research, resulting in relatively sparse long-term baseline data on these systems. This research applies a unique paired-watershed approach (i.e., two similar, adjacent lakes and catchments) to help address these limitations, which provided an opportunity to identify how broad-scale factors are filtered or modified by site-specific characteristics. My first main objective was to document the seasonal hydrochemical variability of runoff and influences on lake chemistry. Both lakes appear to be relatively insensitive to seasonal hydroclimatic variability, largely because periods of high discharge were also characterized by lower concentrations of dissolved and particulate matter, but also because of the relatively long lake water turnover time that suggests the effects of climatic and environmental changes would be felt later in these systems than in lakes and ponds with smaller lake volumes. My second objective was to investigate spatial and temporal trends in the lake diatom communities in order to refine subsequent paleoenvironmental reconstructions. A critical aspect of this objective was testing how faithfully the whole lake diatom community was represented in deep lake surface sediments where sediment cores are routinely collected. Most differences between the two lakes were largely accounted for with micro-environmental conditions associated with the specific sampling location. Also, both lakes exhibited a degree of disconnection between littoral benthic and profundal zones that manifested as an under-representation of the benthic community in deep lake surface sediments, with implications for paleoenvironmental interpretations. Finally, I present a multi-proxy record of environmental conditions in adjacent lakes spanning the period from pre-industrial times. ... Thesis Arctic Climate change Nunavut Melville Island Queen's University, Ontario: QSpace Arctic Nunavut Cape Bounty ENVELOPE(-109.542,-109.542,74.863,74.863) |
institution |
Open Polar |
collection |
Queen's University, Ontario: QSpace |
op_collection_id |
ftqueensuniv |
language |
English |
topic |
Lipids Paleolimnology Organic Geochemistry Limnology Paired-Watershed Diatoms Climate Change Arctic |
spellingShingle |
Lipids Paleolimnology Organic Geochemistry Limnology Paired-Watershed Diatoms Climate Change Arctic Stewart, Kailey Amanda Limnology and paleolimnology of adjacent High Arctic lakes with an emphasis on terrestrial-aquatic linkages: Cape Bounty, Melville Island, Nunavut |
topic_facet |
Lipids Paleolimnology Organic Geochemistry Limnology Paired-Watershed Diatoms Climate Change Arctic |
description |
Thesis (Ph.D, Geography) -- Queen's University, 2011-10-26 09:34:01.144 Our knowledge of how Arctic freshwater ecosystems will respond to continued climate change and variability is fundamentally limited by logistical difficulties of such remote research, resulting in relatively sparse long-term baseline data on these systems. This research applies a unique paired-watershed approach (i.e., two similar, adjacent lakes and catchments) to help address these limitations, which provided an opportunity to identify how broad-scale factors are filtered or modified by site-specific characteristics. My first main objective was to document the seasonal hydrochemical variability of runoff and influences on lake chemistry. Both lakes appear to be relatively insensitive to seasonal hydroclimatic variability, largely because periods of high discharge were also characterized by lower concentrations of dissolved and particulate matter, but also because of the relatively long lake water turnover time that suggests the effects of climatic and environmental changes would be felt later in these systems than in lakes and ponds with smaller lake volumes. My second objective was to investigate spatial and temporal trends in the lake diatom communities in order to refine subsequent paleoenvironmental reconstructions. A critical aspect of this objective was testing how faithfully the whole lake diatom community was represented in deep lake surface sediments where sediment cores are routinely collected. Most differences between the two lakes were largely accounted for with micro-environmental conditions associated with the specific sampling location. Also, both lakes exhibited a degree of disconnection between littoral benthic and profundal zones that manifested as an under-representation of the benthic community in deep lake surface sediments, with implications for paleoenvironmental interpretations. Finally, I present a multi-proxy record of environmental conditions in adjacent lakes spanning the period from pre-industrial times. ... |
author2 |
Geography Lamoureux, Scott F. |
format |
Thesis |
author |
Stewart, Kailey Amanda |
author_facet |
Stewart, Kailey Amanda |
author_sort |
Stewart, Kailey Amanda |
title |
Limnology and paleolimnology of adjacent High Arctic lakes with an emphasis on terrestrial-aquatic linkages: Cape Bounty, Melville Island, Nunavut |
title_short |
Limnology and paleolimnology of adjacent High Arctic lakes with an emphasis on terrestrial-aquatic linkages: Cape Bounty, Melville Island, Nunavut |
title_full |
Limnology and paleolimnology of adjacent High Arctic lakes with an emphasis on terrestrial-aquatic linkages: Cape Bounty, Melville Island, Nunavut |
title_fullStr |
Limnology and paleolimnology of adjacent High Arctic lakes with an emphasis on terrestrial-aquatic linkages: Cape Bounty, Melville Island, Nunavut |
title_full_unstemmed |
Limnology and paleolimnology of adjacent High Arctic lakes with an emphasis on terrestrial-aquatic linkages: Cape Bounty, Melville Island, Nunavut |
title_sort |
limnology and paleolimnology of adjacent high arctic lakes with an emphasis on terrestrial-aquatic linkages: cape bounty, melville island, nunavut |
publishDate |
2011 |
url |
http://hdl.handle.net/1974/6851 |
long_lat |
ENVELOPE(-109.542,-109.542,74.863,74.863) |
geographic |
Arctic Nunavut Cape Bounty |
geographic_facet |
Arctic Nunavut Cape Bounty |
genre |
Arctic Climate change Nunavut Melville Island |
genre_facet |
Arctic Climate change Nunavut Melville Island |
op_relation |
Canadian theses http://hdl.handle.net/1974/6851 |
op_rights |
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner. |
_version_ |
1800746039861313536 |