Active layer variability and change in the Mackenzie Valley, Northwest Territories between 1991-2014: An ecoregional assessment

Garibaldi, Madeleine C.; Bonnaventure, Philip P.; Smith, Sharon L.; Duchesne, C

doi:10.1080/15230430.2022.2097156

Cited by 3 publications

(4 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Discussionmentioning

confidence: 99%

“…While ALT is a useful measure of permafrost condition, ALT can be influenced by surficial geology and ground ice content. In areas with high ground ice content, permafrost thaw results in ground subsidence when the excess ice melts (Garibaldi et al, 2022). This can lead to instances where permafrost thaw has occurred but there is no change in ALT (O'Neill et al, 2019; Streletskiy et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…This can lead to instances where permafrost thaw has occurred but there is no change in ALT (O'Neill et al, 2019; Streletskiy et al, 2017). Therefore, it is possible that some sites with thin stable active layers were undergoing permafrost thaw but had ice‐rich soils (Garibaldi et al, 2022; O'Neill et al, 2019). While ground ice content and detailed information on surficial materials was not available for all sites used in this study, ALT still provides insight into how permafrost thaw was impacting vegetation productivity at ice‐poor sites.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Permafrost thaw induces short‐term increase in vegetation productivity in northwestern Canada

Ogden

Cumming

Smith

et al. 2023

Global Change Biology

Self Cite

View full text Add to dashboard Cite

Over the past several decades, various trends in vegetation productivity, from increases to decreases, have been observed throughout Arctic–Boreal ecosystems. While some of this variation can be explained by recent climate warming and increased disturbance, very little is known about the impacts of permafrost thaw on productivity across diverse vegetation communities. Active layer thickness data from 135 permafrost monitoring sites along a 10° latitudinal transect of the Northwest Territories, Canada, paired with a Landsat time series of normalized difference vegetation index from 1984 to 2019, were used to quantify the impacts of changing permafrost conditions on vegetation productivity. We found that active layer thickness contributed to the observed variation in vegetation productivity in recent decades in the northwestern Arctic–Boreal, with the highest rates of greening occurring at sites where the near‐surface permafrost recently had thawed. However, the greening associated with permafrost thaw was not sustained after prolonged periods of thaw and appeared to diminish after the thaw front extended outside the plants' rooting zone. Highest rates of greening were found at the mid‐transect sites, between 62.4° N and 65.2° N, suggesting that more southernly sites may have already surpassed the period of beneficial permafrost thaw, while more northern sites may have yet to reach a level of thaw that supports enhanced vegetation productivity. These results indicate that the response of vegetation productivity to permafrost thaw is highly dependent on the extent of active layer thickening and that increases in productivity may not continue in the coming decades.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Permafrost thaw induces short‐term increase in vegetation productivity in northwestern Canada

Ogden

Cumming

Smith

et al. 2023

Global Change Biology

Self Cite

View full text Add to dashboard Cite

show abstract

“…Humans, as living beings, are part of the system in which they live and, as a result, have constructive or organic relationships with other elements. Consequently, they influence and are influenced by them (Aberley, 1999;Garibaldi, Bonnaventure, Smith, & Duchesne, 2022;Lipschutz, 2005 McGinnis, 1999). Civil society, within the regional ecological context, proposes this approach to achieve development, which is accompanied by preserving ecological relationships, a spirit of social cooperation, and the integration of material and spiritual needs.…”

Section: Ecoregionalizaitionmentioning

confidence: 99%

Ecoregional Planning: An Overview of Concepts and Approaches

Moradi,

Rahmati

2023

CUS

View full text Add to dashboard Cite

An ecoregion is defined as an area delineated by natural boundaries, possessing a distinct ecosystem compared to its neighboring regions and disregarding political borders. Planning for these regions is referred to as ecoregional planning. Ecoregional planning aims to achieve a balance between ecology, economy, and society, emphasizing the integration of local and human needs with environmental conservation and biodiversity. This paper is a review article conducted through qualitative research, with the goal of providing an organized perspective on ecoregional planning using a descriptive-analytical approach. In this regard, the conceptualization of this type of planning, its historical evolution, various approaches and processes in implementing this type of planning, the development and presentation of the six-dimensional ecoregional models, and the examination of case studies based on the proposed approaches and processes were conducted. The findings indicate that the success of ecoregional planning lies in taking a holistic approach towards economic, social, cultural, and environmental factors and examining the connections between these factors with a focus on ecological issues.

show abstract