Results 41 to 50 of about 843 (168)

Large herbivores on permafrost— a pilot study of grazing impacts on permafrost soil carbon storage in northeastern Siberia [PDF]

, 2022
The risk of carbon emissions from permafrost is linked to an increase in ground temperature and thus in particular to thermal insulation by vegetation, soil layers and snow cover.
Forbes, Bruce C., Grosse, Guido, Göckede, Mathias, Macias-Fauria, Marc, Olofsson, Johan, Strauss, Jens, Ulrich, Mathias, Windirsch, Torben, Wolter, Juliane, Zimov, Nikita   +9 more
core   +4 more sources

Assessing the influence of lake and watershed attributes on snowmelt bypass at thermokarst lakes [PDF]

Hydrology and Earth System Sciences, 2022
Snow represents the largest potential source of water for thermokarst lakes, but the runoff generated by snowmelt (freshet) can flow beneath lake ice and via the outlet without mixing with and replacing pre-snowmelt lake water.
E. J. Wilcox, B. B. Wolfe, P. Marsh
doaj   +1 more source

Consequences of changes in vegetation and snow cover for climate feedbacks in Alaska and northwest Canada

Environmental Research Letters, 2016
Changes in vegetation and snow cover may lead to feedbacks to climate through changes in surface albedo and energy fluxes between the land and atmosphere.
E S Euskirchen, A P Bennett, A L Breen, H Genet, M A Lindgren, T A Kurkowski, A D McGuire, T S Rupp   +7 more
doaj   +1 more source

Underestimation of the impact of land cover change on the biophysical environment of the Arctic and boreal region of North America

Environmental Research Letters, 2022
The Arctic and Boreal Region (ABR) is subject to extensive land cover change (LCC) due to elements such as wildfire, permafrost thaw, and shrubification. The natural and anthropogenic ecosystem transitions (i.e.
Hamid Dashti, William K Smith, Xueli Huo, Andrew M Fox, Mostafa Javadian, Charles J Devine, Ali Behrangi, David J P Moore   +7 more
doaj   +1 more source

Climate and land-use drive the functional composition of vascular plant assemblages across Norway [PDF]

, 2022
Traditionally, biogeography has described the distribution of species. But as plant functional traits and functional diversity underpin ecosystem dynamics, understanding drivers of functional diversity at biogeographical scales is essential to understand
Bendiksby, Mika, Petersen, Tanja Kofod, Speed, James David Mervyn, Vuorinen, Katariina Elsa M   +3 more
core   +1 more source

Decreased Soil Microbial Nitrogen Under Vegetation ‘Shrubification’ in the Subarctic Forest–Tundra Ecotone: The Potential Role of Increasing Nutrient Competition Between Plants and Soil Microorganisms

Ecosystems, 2023
AbstractThe consequences of warming-induced ‘shrubification’ on Arctic soil carbon storage are receiving increased attention, as the majority of ecosystem carbon in these systems is stored in soils. Soil carbon cycles in these ecosystems are usually tightly coupled with nitrogen availability.
Stark, Sari, Kumar, Manoj, Myrsky, Eero, Vuorinen, Jere, Kantola, Anu M., Telkki, Ville-Veikko, Sjögersten, Sofie, Olofsson, Johan, Männistö, Minna K.   +8 more
openaire   +4 more sources

Graminoids Benefit from Decreased Competition in a Tundra Plant Environment [PDF]

, 2022
Global warming is currently changing both the diversity and structure of the Arctic vegetation. Warmer air temperatures are thawing permafrost making more nutrients available for plant uptake, while at the same time climate conditions become too ...
Rolfson Bergenhorn, Minna
core  

Ecosystem changes across a gradient of permafrost degradation in subarctic Québec (Tasiapik Valley, Nunavik, Canada)

Arctic Science, 2019
Permafrost thaw, tundra shrubification, and changes in snow cover properties are documented impacts of climate warming, particularly in subarctic regions where discontinuous permafrost is disappearing.
Maude Pelletier, Michel Allard, Esther Levesque   +2 more
doaj   +1 more source

Increased Arctic NO₃⁻ Availability as a Hydrogeomorphic Consequence of Permafrost Degradation and Landscape Drying

Nitrogen, 2022
Climate-driven permafrost thaw alters the strongly coupled carbon and nitrogen cycles within the Arctic tundra, influencing the availability of limiting nutrients including nitrate (NO3−).
Carli A. Arendt, Jeffrey M. Heikoop, Brent D. Newman, Cathy J. Wilson, Haruko Wainwright, Jitendra Kumar, Christian G. Andersen, Nathan A. Wales, Baptiste Dafflon, Jessica Cherry, Stan D. Wullschleger   +10 more
doaj   +1 more source

Chemical composition of the unexplored volatile fraction of betula glandulosa, a prevalent shrub in Nunavik, Québec [PDF]

, 2021
The volatile fraction of the leaves of Betula glandulosa Michx. has been investigated for its secondary metabolite composition by GC/MS and GC/FID.
Boudreau, Stéphane, Fernandez, Xavier, Séguin, Jean-Christophe, Voyer, Normand   +3 more
core   +2 more sources