10 Works

Monitoring of avian predator reproduction on Bylot Island, Nunavut, Canada

Gilles Gauthier & Marie-Christine Cadieux
Predators play a key role in the functioning of ecosystems and could potentially control the abundance of their prey. As predators are at the top of the food chain, they can be good indicators of the state of the tundra ecosystem. Avian predators, mostly raptors and seabirds, are the most diverse groups of predators in the Arctic tundra and range from specialists to generalists in terms of their diet. Most species of avian predators are...

Concentrations of dissolved methane, carbon dioxide and oxygen in thermokarst lakes and ponds in palsa peatlands, northern Québec, Canada

Alex Matveev, Isabelle Laurion, Bethany N. Deshpande & Warwick F. Vincent
Permafrost peatland lakes are an organic-rich subcategory of thermokarst waterbodies that are known for their high rates of greenhouse gas emissions (Matveev et al 2016). This Nordicana D archive presents the concentrations of methane and carbon dioxide that were measured in waters sampled at different depths in thermokarst lakes of the Sasapimakwananisikw River (SAS) peatland valley (subarctic Québec, Canada) in summer and winter. Additional data are presented for oxygen, temperature and conductivity profiles in a...

Location of beach ridges associated with the maximal extent of the Champlain Sea obtained from high-resolution LiDAR elevation data

Antoine Prince, Jan Franssen & Daniel Fortier
The dataset in this issue of Nordicana D comprises data collected remotely using LiDAR elevation data in the St. Lawrence Lowlands area (i.e., Québec, Ontario, Vermont, New-York State). It contains the location of beach ridges associated with the maximal extent of the Champlain Sea (11,100 to 9,400 years BP), a post-glacial sea that inundated the area following the retreat of the Laurentides Ice Sheet, the inlandsis that covered much of North America during the most...

Monitoring of arctic and red fox reproduction on Bylot Island, Nunavut, Canada

Dominique Berteaux
Foxes are strongly dependent on dens for parturition and rearing of cubs. Due to the shallow permafrost-free layer in most of the arctic fox’s range, new dens are rarely dug and existing ones are often used repeatedly year after year. An effective way to monitor both arctic and red fox populations is to take advantage of their use of den sites for reproduction. Starting in 1993, known den sites in the south plain of Bylot...

Permafrost geochemistry and retrogressive thaw slump morphology (Peel Plateau, Canada)

Scott Zolkos & Suzanne E. Tank
In ice-rich hummocky terrains spanning broad swaths of the Canadian Arctic, accelerating permafrost thaw and terrain subsidence (thermokarst) are exposing materials that were previously locked away for millennia. Among the most significant implications of thermokarst is the rapid mobilization of these materials into modern biogeochemical cycles. For instance, retrogressive thaw slumps (RTSs) can release large amounts of ions, carbon, nutrients, and sediments into streams, thereby reshaping freshwater ecosystems and elemental cycles. As features that expose...

Seasonal monitoring of arthropod abundance at Bylot Island, Nunavut

Joël Bêty
Monitoring seasonal variation in arthropod abundance above or near the soil surface primarily allows us to determine the interannual availability of food resources for insectivorous birds nesting on Bylot Island, Nunavut. Arthropod sampling begins as soon as the conditions allows it (when the snow melts in the first or second week of June) and continues until the end of the season (mid-August). Every summer, ten arthropod traps are installed facing the wind in the Qarlikturvik...

Monitoring of shorebirds reproduction on Bylot Island, Nunavut, Canada

Joël Bêty
Nests are mainly found through systematic searches of a 4.5 km2 core area near our main field station from early June to early July since 2005. Nests are also found opportunistically while conducting other field activities over the study area. Once found, nests are positioned with a GPS receiver. Each nest is then visited during the breeding period to determine clutch size, laying and hatching dates and hatching and fledging successes. Nests found the main...

Soil temperature and soil water content measurements near Umiujaq and in the Sheldrake catchment

Monique Bernier, Ralf Ludwig, Jimmy Poulin, Chaima Touati, Parvin Kalantari, Lingxiao Wang, Yueli Chen, Andres Jacome & Tahiana Ratsimbazafy
In northern regions, the seasonal Freeze Thaw (FT) is among climatic phenomenon having major impacts on terrestrial photosynthesis and respiration as well as soil evaporation and water percolation into the underground soil layers. From 2011 onwards, a study was led by the Research team in Environmental and Northern Remote Sensing (TENOR) of the Institut national de la recherche scientifique (INRS), in association with Centre for Northern Studies (CEN) and the Ludwig-Maximilians University (LMU) in Germany....

Monitoring of Lapland longspur reproduction on Bylot Island, Nunavut, Canada

Gilles Gauthier & Joël Bêty
The Lapland longspur (Calcarius lapponicus) is one of the most abundant and visible terrestrial songbird breeding in the Arctic. As other Arctic-nesting birds, they are constrained by a very short time period during which they can reproduce. Though the timing of hatch is critical for the growth and survival of young, even more crucial is the ability of longspurs to ensure that their nests survive until hatch. Nest predation is an important source of mortality...

Monitoring of Greater Snow Goose reproduction on Bylot Island, Nunavut, Canada

Gilles Gauthier & Marie-Christine Cadieux
Nest searches are carried out on foot from our main field station since 1989 and from a secondary field camp inside the main goose colony since 1992. Nests are found during laying or incubation period by searches conducted over various areas in both sectors. At the main goose colony, systematic nest searches are conducted using two methods: (1) over an intensively-studied core area (ca 50 ha) located in the centre of the colony every year,...

Registration Year

  • 2019