cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5443/11176
title: Concentration (fg/kg) of radioactive isotope Protactinium-231 (231Pa) in the Beaufort Sea at 3 stations in 2007 and at 3 stations in 2009

description: The dataset consists of 231Pa concentrations (fg/kg seawater) measured in the Beaufort Sea at three stations in 2007 (Sept 22-Oct 15) and three stations in 2009 (Aug 27 - Sep 12). In 2007, 20L samples were collected and quickly filtered through an Acropak cartridge (0.45 um). The samples were then acidified to pH 2 with concentrated HCl and spiked with pre-weighed quantities of 229Th and FeCl3. Acidified samples were left to equilibrate for 12 to 24 hours and their pH adjusted to 8-9 to precipitate Fe hydroxide and scavenge 230Th and 229Th. The precipitates were let to settle over 12 to 24 hours and recovered by suction with a peristaltic pump and centrifugation into a 50 ml centrifuge tube for transport to UBC where they were measured on a Element II ICP-MS. The 2007 station locations were: KC500 (71°05'N, 134°22'W, 6 samples at 6 depths), KC2000 (71°44'N, 135°30'W, 12 samples at 12 depths), and KC2700 (72°28'N, 136°56'W, 12 samples at 12 depths). In 2009, the 20L samples were filtered, acidified and stored for subsequent analysis. The 2009 station locations were: L1 (71°06'N, 139°10'W, 12 samples at 12 depths), L2 (74°30'N, 137°00'W, 12 samples at 12 depths), and L1.1 (72°31'N, 136°48'W, 12 samples at 12 depths).
description: Purpose: Variations in seawater 231Pa concentration with depth provide information on the lateral transport of particle reactive elements during removal by scavenging from the water column and on deep water circulation.
description: Summary: Comparing 230Th measurements made in 2007 and 2009 to measurements made by others in 1995 documents changes in deep water circulation in the Arctic Ocean and the penetration of a new water mass in Canada Basin. Parallel measurements of 231Pa provide complementary information regarding the source of deep water which moved into Canada Basin in 2007.
DOI: 10.5443/11416
title: Interview and workshop transcripts from harvesters in Fort Good Hope NWT about community hunts, barren-ground caribou hunts, and food-sharing practices, 2009-2010

description: The data set consists of transcripts of interviews with hunters, and those involved in meat-sharing networks. Eight transcripts are included from community hunt participants; 5 transcripts are included from household hunters. A further 9 transcripts are included from those involved in sharing networks. One transcript is included from a hunt organizer. A public workshop transcript is also included that adds historical context to current hunting and sharing practices.
description: Purpose: Data was collected to understand community responses to the changing availability of barren-ground caribou, in terms of hunting and food-sharing. This involved looking at the history of community hunts, and comparing sharing networks between a community hunt and a series of household hunts.
description: Summary: Not Applicable
DOI: 10.5443/1669
title: Fossil insect and vertebrate data from Old Crow Flats, northern Yukon, 2007-2009

description: Stratigraphic sections along the Old Crow River, including sites CRH 11 and 12 were studied in the summers of 2007 and 2008. Bulk sampling of stratigraphic intervals associated with the last interglacial was completed for fossil insect studies, and the penultimate interglacial for vertebrate remains.
description: Purpose: To study paleoenvironments of the last interglacial in the Old Crow Flats, northern Yukon.
description: Summary: Sediments from river bluff exposures were screened to concentrate remains of small mammals and fossil insects from times in the past that were as warm as or warmer than today.
DOI: 10.5443/706
title: Assessment of percent ectomycorrhizal colonization of plant roots from randomly selected cores taken in Long-term ecological research (LTER) soil warming and fertilization plots.

description: In the summer of 2007, we collected soils from treatment plots that are maintained as part of the Arctic Long-term Ecological Research (LTER) site at Toolik Lake, AK (68o38'N, 149o34'W, elevation 760m), since 1989. Treatments include warming by greenhouses and fertilization (10 g m-2 year-1 N as NH4NO3; and 5 g m-2 year-1 P as Ca P) in a factorial design. Three replicate soil cores were taken from each tratment plot. Plant roots were obtained from soil cores by washing. Roots were assessed for ectomycorrhizal status using microscopy.
description: Purpose: Assessment of long-term warming and fertilization on the diversity and biomass of ectomycorrhizal fungi.
description: Summary: Not Applicable
DOI: 10.5443/707
title: Phospholipid fatty acid (PLFA) profiles and 13C-enrichment values for 23 PLFAs from rhizosphere, organic and mineral soils surrounding Betula nana, Ledum palustre, and Salix pulchra plants, 4 sampling dates.

description: We tested the influence of three different tundra plant species (Salix pulchra, Betula nana, and Ledum palustre) on the soil microbial community composition in bulk organic, mineral and rhizosphere soils. We used stable isotope techniques to study carbon transfer from plants labeled with 13CO2 in situ to the soil microbial community, and PLFA analysis to test the resulting effect on the microbial community composition.
description: Purpose: Stable isotope probing of the actively growing rhizosphere microbial community
description: Summary: Not Applicable
DOI: 10.5443/10902
title: White spruce tree-ring-width data in Old Crow Flats, Yukon Territory, 2007-2008

description: A network of 23 white spruce sites was established in Old Crow Flats, and tree-ring samples were collected from each site using standard dendrochronological techniques. Cores were collected from living trees and cookies were cut from dead trees. Ring-width series were measured from all samples at the Carleton University Paleoecology Laboratory, and mean site chronologies were calculated for each site. Climate-growth relations of each site were assessed. Regional growth patterns were compared against other white spruce chronologies from across northwestern North America to determine the larger-scale importance of tree-ring growth in Old Crow Flats. For more details refer to Porter, Trevor J. and Michael F.J. Pisaric, 2011, Temperature-growth divergence in white spruce forests of Old Crow Flats, Yukon Territory, and adjacent regions of northwestern North America. Global Change Biology 17: 3418-3430, doi: 10.1111/j.1365-2486.2011.02507.x.
description: Purpose: The purpose of this research is to develop climatically sensitive tree ring records from the Old Crow Flats region. It is hoped that these records will extend the temporally short instrumental climate record from Old Crow which currently only covers the period 1951-2004. Such a short record makes it difficult to assess long-term climate trends and variability and accurately define baseline climatic conditions. By using proxy data sources such as tree ring growth records, we can extend the short instrumental climate record further back in time. It is anticipated that this research will produce climatically-sensitive tree ring chronologies extending over the past 2-3 centuries.
description: Summary: Not Applicable
DOI: 10.5443/11195
title: Neodymium (Nd) isotopic ratio in the seawater of the Beaufort Sea at 3 stations sampled in 2009

description: The dataset consists of Nd isotopic ratios expressed in the epsilon notation (i.e. [((143Nd/144Nd)sw / (143Nd/144Nd)std) - 1]x10,000) measured in the Beaufort Sea at three stations sampled in 2009 (Aug 27 - Sep 12). 20L samples were collected and quickly filtered through an Acropak cartridge (0.45 um). The samples were then acidified to pH 2 with concentrated HCl and returned to the shore-based laboratory for analysis on a multi-collector Inductively Coupled Plasma mass spectrometer. The station locations are: L1 (71°06'N, 139°10'W, 12 samples at 12 depths), L2 (74°30'N, 137°00'W, 12 samples at 12 depths), and L1.1 (72°31'N, 136°48'W, 12 samples at 12 depths)
description: Purpose: Water originating from the Pacific and Atlantic Ocean or added by Arctic rivers can be distinguished from distinct chemical signatures. In particular, Pacific waters have a different neodymium isotopic composition, which is imparted by the weathering of young volcanic rocks, which dominates the geology of the Pacific Rim. The "radiogenic" isotopic signature (i.e. high 143Nd/144Nd) of Pacific waters stand in sharp contrast to that of Atlantic waters and rivers whose drainage basin is dominated by old continental crust, such as the Mackenzie River. Nd isotopes are used to identify of origin of deep water in Canada Basin and to trace the course and mixing of Pacific Water transiting through the Arctic Ocean.
description: Summary: The Nd isotope signature of seawater is imparted by the isotopic composition of continental runoff, which is distinct for each drainage basins. As this signal is not altered by biological fractionation, Nd isotopic compositions of ocean waters provides a powerful tool to trace the origin of water masses and their circulation.
DOI: 10.5443/1643
title: Ground penetrating radar data for ice patches in the Mackenzie Mountains, Northwest Territories, 2007-2008

description: Ground penetrating radar data was collected along transects across the ice patches at 250 MHz and 500 MHz frequencies. Traces were collected roughly every 5 cm along the transects with the GPS location and elevation being recorded at each trace location. The data is in a Pulse EKKO format and indicates the thickness of the ice and internal layering. The transects were laid out in a grid manner such that the three dimensional geometry of the patch could be determined.
description: Purpose: Ground penetrating radar data was collected to image the geometry and internal structure of permanent high alpine ice patches. This data will assist in modelling the formation processes of ice patches, and determining their current accumulation/melt rates.
description: Summary: This dataset consists of ground penetrating radar data for three high alpine ice patches in the Mackenzie Mountains. This data was collected to determine the internal strucutre of permanent ice patch features, and to provide a better estimate of the rate at which ice patches are melting. This study is a component of the IPY-Federal funded NWT Ice Patch Study.
DOI: 10.5443/1644
title: Ice core data from ice patches in the Mackenzie Mountains, Northwest Territories, 2007-2009

description: Ice patches were cored with a 8 cm hand-operated ice drill. Distinct bands of caribou fecal matter were measured (core depth) and collected using clean instruments. Each band was dated by accelerator mass spectrometry (AMS). The dataset includes core depths and AMS dates for 10 cores extracted from 3 ice patches.
description: Purpose: Ice patches in the Mackenzie Mountains were cored to determine the internal structure of permanent ice patch features, and to recover samples of stratified caribou fecal matter for biological analyses.
description: Summary: This dataset consists of core depths and radiocarbon dates for layered caribou fecal matter extracted from ice patches in the Mackenzie Mountains. This study is a component of the IPY-Federal funded NWT Ice Patch Study.
DOI: 10.5443/1672
title: Lakes and Permafrost in Old Crow Flats

description: Two sets of thermistor cables will be installed, one at a site in the OCF where drill depth will target 50 m, and the other closer to the community. The site in OCF will be used to obtain the curvature in the ground temperature profile, and establish the apparent response to recent regional increases in air temperature. The sites nearer to Old Crow will be established to 10 m depth, and will be monitored monthly by the VGFN on a long-term basis, to observe the response of permafrost to future climate change as it occurs. These data will be used to establish the relation between climate change and permafrost under two or three surface types in the area. Ground-ice investigations will concentrate on conditions in the uppermost 2 m of permafrost to establish the potential subsidence of the terrain following active-layer deepening. An active-layer course will be established for long-term community monitoring of climate-change impact, with benchmarks to record the accompanying subsidence of the ground. Soils in near-surface permafrost will be assessed for carbon content to estimate the potential carbon release due to warming. Rates of lake expansion will be determined for the OCF and lake-bottom temperatures will be collected to determine the thermal impact of the lakes on permafrost. A graduate student will be recruited to lead this initiative.
description: Purpose: Examine the permafrost conditions along lakeshores in Old Crow Flats
description: Summary: Northern Yukon is in the zone of continuous permafrost, but there is little local information on the temperature or quantity of ice in the ground. In the OCF, there are over 2600 lakes, many of which are expanding, apparently due to melting of the surrounding permafrost. Permafrost research activities will comprise 1) documenting the present ground temperature profile in the OCF, 2) establishing a community monitoring program for measurement of permafrost temperatures at sites accessible year-round from Old Crow, and 3) investigating the near-surface ground ice content of the OCF.
DOI: 10.5443/705
title: Automated Ribosomal Inergenic Spacer Analysis (ARISA) of fungal Internal Transcribed Spacers region of 18S rRNA genes. Soil samples taken from Long-term Ecological Research (LTER) greenhouse treated and control plots at Toolik Lake, AK; 5 sampling da

description: In the summer of 2006 and 2007, we collected soils treated with warming by greenhouses since 1989, which are maintained as part of the Arctic Long-term Ecological Research (LTER) site at Toolik Lake, AK (68o38'N, 149o34'W, elevation 760m). Total nucleic acids were extracted from soil samples allowing for the simultaneous assessment of the total and actively growing components of the soil microbial community. We used Automated Ribosomal Inergenic Spacer Analysis (ARISA) of the Internal Transcribed Spacer (ITS) region of 18S rRNA genes to profile the fungal community.
description: Purpose: Assessment of long-term warming on structure and function of soil microbial communities.
description: Summary: Not Applicable
DOI: 10.5443/760
title: Present and past hydroecology of the Old Crow Flats, YT, 2007-2011

description: Water samples are being collected from ~50 basins and 13 river locations at three time steps during the thaw season for analysis of water chemistry, stable isotope composition, total suspended sediment concentration, phytoplankton and zooplankton. Sampling began in 2007 and will continue through 2011. In 2007 at six lakes, data loggers were installed to obtain continuous records of lake level changes and periphyton samplers were deployed to characterize benthic algae and provide information about water-quality and ecological conditions. An evaporation pan and meteorological station have been established at the Old Crow airport to constrain isotope-mass balance modelling of lake water isotope compositions.
description: Purpose: The hydroecological research initiative described here comprises one of many components of a multidisciplinary and collaborative research program supported by the Government of Canada International Polar Year (IPY) Program. Furthering knowledge of the hydroecology of OCF ecosystem is central to addressing concerns expressed by the community of Old Crow and will contribute to the Park Management Plan for Vuntut National Park. Research will assess the relative importance of hydrological processes that govern present-day lake water balances and whether currently declining lake levels represent a unique directional change or reflect natural hydrological variability. Contemporary hydrological variability in the OCF will be determined using water isotope tracers. Parallel studies will characterize the limnological conditions of the lakes and identify relationships between water chemistry and basin hydrology. Records of hydroecological variability over decadal to centennial timescales will be derived from multi-proxy analysis of lake sediment cores obtained from selected basins in the OCF.
description: Summary: Not Applicable
DOI: 10.5443/817
title: Vuntut Gwitchin First Nation Oral History transcripts, Old Crow, Yukon, 1997-2008

description: The interviews in this database have been collated from both internal and external research projects involving VGFN participation. The interviews have been translated (where necessary) and transcribed in English, and transcripts have been indexed by keyword in a master list.
description: Purpose: These 375-plus transcripts document oral history interviews on a range of topics conducted with members of the Vuntut Gwitchin First Nation (VGFN) since 1997. These interview transcripts have been collated and are maintained and updated by the VGFN Heritage Branch in Old Crow, Yukon.
description: Summary: Not Applicable
DOI: 10.5443/11178
title: Salmonella spp. and E.coli 0157:H7 sampling of Arctic hare, Canada goose, snow goose, rock ptarmigan, willow ptarmigan, muskox, walrus, Arctic charr between 2007 and 2008 in Kuujjuaq, Tasiujaq, Inukjuak, Salluit, Kangirsuk, Umiujaq and Ivujivik.

description: The data set content includes: Sample ID (identification of sample), species, latitude and longitude of communities (in degree,minutes), community, date of collection, age, sex, tissue type, frozen samples weight (g), singlepath E.coli 0157 screening*, MSRV Salmonella screening, confirmed test**(MFLP-80,MFLP-30***), Freezer description. *Detection of E. coli O157 by the Merck Singlepath® E. coli O157 Kit", MFLP-82 ** Procedure of the Isolation of Salmonella species by the Modified Semi-Solid Rappaport Vassiliadis (MSRV) Method, MFLP-75. ***MFLP-80 =Isolation of E. coli O157:H7 or NM in Foods@; MFLP-30= The DuPont Qualicon Bax® system method for the detection of E. coli O157:H7 in raw ground beef and fruit juice.
description: Purpose: The objectives of this project were two-fold: (1) to implement rapid, simple, and inexpensive test methods enabling the detection of the foodborne pathogens Escherichia coli O157:H7 and Salmonella in foods and related samples, for the purpose of establishing basic on-site food microbiology testing capability at the Nunavik Research Centre (NRC) in Kuujjuaq, with the provision of hands-on training in the operation of methods; and (2) to use this new capability to conduct a survey of the eastern Canadian Arctic in order to ascertain the prevalence of E. coli O157:H7 and Salmonella in traditional meats derived from arctic food animals. For the prevalence study, a total of 129 samples from arctic mammals, fowl, fish and environmental swabs from Kuujjuaq and Tasiujaq community freezers were analyzed at both the NRC and CFIA laboratories.
description: Summary: The objectives of this project were two-fold: (1) to implement rapid, simple, and inexpensive test methods enabling the detection of the foodborne pathogens Escherichia coli O157:H7 and Salmonella in foods and related samples, for the purpose of establishing basic on-site food microbiology testing capability at the Nunavik Research Centre (NRC) in Kuujjuaq, with the provision of hands-on training in the operation of methods; and (2) to use this new capability to conduct a survey of the eastern Canadian Arctic in order to ascertain the prevalence of E. coli O157:H7 and Salmonella in traditional meats derived from arctic food animals. For the prevalence study, a total of 129 samples from arctic mammals, fowl, fish and environmental swabs from Kuujjuaq and Tasiujaq community freezers were analyzed at both the NRC and CFIA laboratories.
DOI: 10.5443/11289
title: Anisakidae nematodes collected in 4 species of marine mammals, and 11 species of marine fish, from 2006 to 2009, from Nain, Kangiqsualuujjuaq, Kuujjuaq, Quaqtaq, Kangiqsujuaq, Salluit, Inukjuak, Ivujivik, Puvirnituq, Sanikiluaq, Arviat.

description: The data set content includes: Sample ID (identification of sample), species, latitude and longitude of communities (in degree, minutes), community, date of collection, age, sex, tissue type (stomach, flesh), stomach weight (g), stomach content, number of nematodes, developmental stage of the parasite and its species*, PCR identification, laboratory test used (digestion, visual identification).
description: Purpose: Some members of the Anisakidae family of parasites are zoonotic (i.e. can infect both animals and humans), and can be transmitted to humans via the consumption of insufficiently-cooked meat from infected fish. This study was conducted to determine the distribution, prevalence, and species of Anisakidae nematodes in various marine mammals and fish that are eaten as traditional foods in multiple areas of Canada¿s North. A second objective was to determine whether marine mammals are definitive hosts for the parasite (i.e. a host in which the parasite can reproduce sexually), and thus, capable of transmitting the parasite through the marine food web.
description: Summary: Two species of the Anisakidae family of parasites, Anisakis simplex and Pseudoterranova decipiens, are zoonotic (i.e. can infect both humans and animals), and can be transmitted to humans via insufficiently-cooked meat from infected fish. The life cycle of these parasites can involve the whole marine food web and is dependent on climate change. New species of marine mammals and fish are migrating to the North, and prior to this study, little was known about these parasites in Canada's Arctic. As such, it was important to determine:(a) which species of Anisakidae parasites are present in Canada¿s Arctic marine mammals and fish, and with what prevalence, (b) whether these parasites reproduce in marine mammals of Canada's Arctic, and if so, in which animal species, and what effect the parasites have in marine mammal stomachs, and (c) whether these parasites pose a risk of foodborne disease to the Inuit, among whom the consumption of raw fish is a traditional and common practice. Among others, this dataset includes data on the animal from which the samples arose (species, sex, age, tissues collected), community in which the hunter resides, date of collection, the species and number of Anisakidae parasites present, and the laboratory methods used.
DOI: 10.5443/11456
title: Interview and focus group data on intergenerational resilience in Aklavik, NWT, 2009

description: The data consists of quantitative and qualitative data. 26 interviews semi-structured interviews using an interview guide to collect quantitative and qualitative data were done with elders (n=9), adults (n=8) and youth (n=9). 2 focus groups were done with youth (n=6) and elders (n=6). There are audio files and transcriptions for all interviews. 7 unstructured interviews were done with elders (n=5) and youth (n=2) to collect qualitative data
description: Purpose: Conduct case study research on resilience. The intention for the project was to understand how communities are ensuring their health and wellbeing in the face of social and ecological changes. The aim of the research was to understand how resilience was defined in Gwich'in and Inuvialuit cultures; explore pre-existing variables as measures to resilience with youth, adults, and elders; and learn what changes in the community and on the land different generations consider to be negative and positive for them.
description: Summary: Not Applicable