Changes in water quality related to permafrost thaw may significantly impact zooplankton in small Arctic lakes

2020 ◽  
Vol 30 (8) ◽  
Author(s):  
Jasmina M. Vucic ◽  
Derek K. Gray ◽  
Rachel S. Cohen ◽  
Maariyah Syed ◽  
Alyssa D. Murdoch ◽  
...  
Keyword(s):  
Water Quality ◽  
Arctic Lakes ◽  
Permafrost Thaw

scholarly journals Review article: Inferring permafrost and permafrost thaw in the mountains of the Hindu Kush Himalaya region

2016 ◽  
Author(s):  
Stephan Gruber ◽  
Renate Fleiner ◽  
Emilie Guegan ◽  
Prajjwal Panday ◽  
Marc-Olivier Schmid ◽  
...  
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Environmental Changes ◽  
High Elevation ◽  
Review Article ◽  
Mountain Glaciers ◽  
Permafrost Thaw ◽  
Hindu Kush ◽  
Vegetation Water ◽  
Human Systems

Abstract. The cryosphere reacts sensitively to climate change, as evidenced by the widespread retreat of mountain glaciers. Subsurface ice contained in permafrost is similarly affected by climate change, causing persistent impacts on natural and human systems. In contrast to glaciers, permafrost is not observable spatially and therefore its presence and possible changes are frequently overlooked. Correspondingly, little is known about permafrost in the mountains of the Hindu Kush Himalaya region, despite permafrost area exceeding that of glaciers in nearly all countries. Based on evidence and insight gained mostly in other permafrost areas globally, this review provides a synopsis on what is known or can be inferred about permafrost in the mountains of the HKH region. Given the extreme nature of the environment concerned, it is to be expected that the diversity of conditions and phenomena encountered in permafrost exceed what has previously been described and investigated. We further argue that climate change in concert with increasing development will bring about diverse permafrost-related impacts on vegetation, water quality, geohazards, and livelihoods. To better anticipate and mitigate these effects, a deepened understanding of high-elevation permafrost in subtropical latitudes as well as the pathways inter-connecting environmental changes and human livelihoods are needed.

Environmental variables associated with littoral macroinvertebrate community composition in Arctic lakes

2020 ◽  
pp. 1-14
Author(s):  
Rachel S. Cohen ◽  
Derek K. Gray ◽  
Jasmina M. Vucic ◽  
Alyssa D. Murdoch ◽  
Sapna Sharma
Keyword(s):  
Chlorophyll A ◽  
Environmental Variables ◽  
Environmental Gradients ◽  
Road Dust ◽  
Arctic Lakes ◽  
Macroinvertebrate Communities ◽  
Lake Ecosystems ◽  
Permafrost Thaw ◽  
Selection Of Variables ◽  
Road Development

The relationship between littoral macroinvertebrate communities and environmental gradients in Arctic lakes is poorly understood, making it difficult to predict whether these important components of lake ecosystems will be affected by emerging stressors such as permafrost thaw and road development. To better understand how littoral macroinvertebrates are related to environmental gradients, we characterized macroinvertebrate communities and environmental variables for 32 Arctic lakes across the boreal–tundra transition in the Northwest Territories. Our analysis showed that a small selection of variables had strong relationships with community structure: calcium, conductivity, latitude, surface area, catchment area, percent fine sediment, chlorophyll a, and whitefish (Coregonus clupeaformis or Coregonus nasus) presence. Many of these variables, including calcium, conductivity, and chlorophyll a levels, are affected by permafrost thaw and road dust contamination. Based on the direction and magnitude of these relationships, we hypothesize that macroinvertebrate abundance might decline in response to permafrost thaw and road dust contamination, while taxon diversity may rise. While correlative in nature, our results and hypotheses may be valuable as future studies evaluate ongoing changes in Canada’s Arctic lakes.

scholarly journals Review article: Inferring permafrost and permafrost thaw in the mountains of the Hindu Kush Himalaya region

2017 ◽  
Vol 11 (1) ◽  
pp. 81-99 ◽  
Author(s):  
Stephan Gruber ◽  
Renate Fleiner ◽  
Emilie Guegan ◽  
Prajjwal Panday ◽  
Marc-Olivier Schmid ◽  
...  
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Environmental Changes ◽  
High Elevation ◽  
Review Article ◽  
Mountain Glaciers ◽  
Permafrost Thaw ◽  
Hindu Kush ◽  
Vegetation Water ◽  
Human Systems

Abstract. The cryosphere reacts sensitively to climate change, as evidenced by the widespread retreat of mountain glaciers. Subsurface ice contained in permafrost is similarly affected by climate change, causing persistent impacts on natural and human systems. In contrast to glaciers, permafrost is not observable spatially and therefore its presence and possible changes are frequently overlooked. Correspondingly, little is known about permafrost in the mountains of the Hindu Kush Himalaya (HKH) region, despite permafrost area exceeding that of glaciers in nearly all countries. Based on evidence and insight gained mostly in other permafrost areas globally, this review provides a synopsis on what is known or can be inferred about permafrost in the mountains of the HKH region. Given the extreme nature of the environment concerned, it is to be expected that the diversity of conditions and phenomena encountered in permafrost exceed what has previously been described and investigated. We further argue that climate change in concert with increasing development will bring about diverse permafrost-related impacts on vegetation, water quality, geohazards, and livelihoods. To better anticipate and mitigate these effects, a deepened understanding of high-elevation permafrost in subtropical latitudes as well as the pathways interconnecting environmental changes and human livelihoods are needed.

Biological responses to permafrost thaw slumping in Canadian Arctic lakes

2012 ◽  
Vol 58 (2) ◽  
pp. 337-353 ◽  
Author(s):  
JOSHUA R. THIENPONT ◽  
KATHLEEN M. RÜHLAND ◽  
MICHAEL F. J. PISARIC ◽  
STEVEN V. KOKELJ ◽  
LINDA E. KIMPE ◽  
...  
Keyword(s):  
Canadian Arctic ◽  
Arctic Lakes ◽  
Permafrost Thaw ◽  
Biological Responses

Volume Analysis for Attainability of Water Quality Criteria for Three Loading Constituents

2004 ◽  
Author(s):  
Ping Wang ◽  
Lewis Linker ◽  
James Collier ◽  
Gary Shenk ◽  
Robert Koroncai ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Criteria ◽  
Water Quality Criteria ◽  
Volume Analysis
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