cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.qshuv7
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON ((37.1875 0.2283333, 37.1875 0.2266667, 37.18667 0.2266667, 37.18667 0.2191667, 37.1875 0.2191667, 37.1875 0.2183333, 37.19167 0.2183333, 37.19167 0.2191667, 37.19333 0.2191667, 37.19333 0.2208333, 37.1925 0.2208333, 37.1925 0.2216667, 37.19167 0.2216667, 37.19167 0.2266667, 37.19083 0.2266667, 37.19083 0.2275, 37.19 0.2275, 37.19 0.2283333, 37.1875 0.2283333))",
 "TaxonKey is Mammalia"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027818-241107131044228/datasets/export for details.
DOI: 10.18739/a2sq8qj5v
title: Surface and underwater irradiance timeseries from the Stefansson Sound, Beaufort Sea, Alaska, 1984-2018.

description: In the nearshore Alaskan Beaufort Sea, discrete, isolated rocky habitats harbor biological communities that are unusually diverse for the region, with markedly different fauna and flora than found in the surrounding soft sediment areas. The boulder fields also support tightly linked food webs, with connections to higher trophic levels such as fishes and seals. These systems are highly vulnerable to disturbances, including sedimentation from human activities and coastal erosion, fluctuations in salinity from seasonal river discharge, and temperature increases from heat influx originating at lower latitudes and from atmospheric warming. Spatial isolation of these boulder fields and the slow development of benthic communities limit ecosystem recovery from disturbance. To assess the possible ecological effects of such environmental disturbances, this field program undertook an investigation of the biological communities and environmental conditions across the Stefansson Sound Boulder Patch, the largest of the Beaufort Sea nearshore boulder fields. 
 The overlying objectives of this program were to: 1) monitor incident and in situ photosynthetically active radiation (PAR), salinity, temperature, currents, and pH to define the spatial variability in annual kelp productivity and biomass; 2) characterize benthic community structure changes across environmental gradients in the Boulder Patch and 3) collect annual measurements of kelp growth in the Boulder Patch to provide a nearly continuous record of kelp growth since 1976. Within and in addition to these objectives, individual research projects were completed, using experimental approaches, timeseries analysis and historical data to gain an in depth understanding of mechanisms (past and present) that resulted in the Boulder Patch community we see today and how this community may vary in future conditions.
 These datasets here result from ecosystem studies and monitoring that took place from 1976 to 2018 at multiple site in Stefansson Sound, Alaska.
 To understand spatiotemporal variability in underwater light environment, photosyntheically active radiation (PAR, 400-700 nanometers) was measured from moorings on the benthos at multiple locations in Stefansson Sound, Alaska using LICOR spherical quantum sensors, and at an adjacent site on land for incident PAR using LICOR cosine sensors. The overall dataset spans from 1984 to 2018, though there are gaps that vary from days to multiple years, depending on the location.
DOI: 10.18739/a2p26q457
title: Water column physiochemical measurements in the Boulder Patch, Beaufort Sea, Alaska, 1986-2018

description: In the nearshore Alaskan Beaufort Sea, discrete, isolated rocky habitats harbor biological communities that are unusually diverse for the region, with markedly different fauna and flora than found in the surrounding soft sediment areas. The boulder fields also support tightly linked food webs, with connections to higher trophic levels such as fishes and seals. These systems are highly vulnerable to disturbances, including sedimentation from human activities and coastal erosion, fluctuations in salinity from seasonal river discharge, and temperature increases from heat influx originating at lower latitudes and from atmospheric warming. Spatial isolation of these boulder fields and the slow development of benthic communities limit ecosystem recovery from disturbance. To assess the possible ecological effects of such environmental disturbances, this field program undertook an investigation of the biological communities and environmental conditions across the Stefansson Sound Boulder Patch, the largest of the Beaufort Sea nearshore boulder fields. 
 The overlying objectives of this program were to: 1) monitor incident and in situ photosynthetically active radiation (PAR), salinity, temperature, currents, and pH to define the spatial variability in annual kelp productivity and biomass; 2) characterize benthic community structure changes across environmental gradients in the Boulder Patch and 3) collect annual measurements of kelp growth in the Boulder Patch to provide a nearly continuous record of kelp growth since 1976. Within and in addition to these objectives, individual research projects were completed, using experimental approaches, timeseries analysis and historical data to gain an in depth understanding of mechanisms (past and present) that resulted in the Boulder Patch community we see today and how this community may vary in future conditions.
 To understand spatial and temporal variation in water quality, temperature, conductivity, salinity, dissolved oxygen, pH, and chlorophyll were measured at multiple locations in Stefansson Sound, Beaufort Sea, Alaska. Data before 2014 only includes temperature and salinity information. Measurements were taken near the surface and near the bottom. These data were collected as part of a larger studies to assess potential impacts of offshore development and to gain an in-depth understanding of mechanisms (past and present) that resulted in the Boulder Patch community we see today and how this community may vary in future conditions.
DOI: 10.18739/a23j3922b
title: Surface and underwater irradiance timeseries from the Stefansson Sound, Beaufort Sea, Alaska, 1984-2018.

description: In the nearshore Alaskan Beaufort Sea, discrete, isolated rocky habitats harbor biological communities that are unusually diverse for the region, with markedly different fauna and flora than found in the surrounding soft sediment areas. The boulder fields also support tightly linked food webs, with connections to higher trophic levels such as fishes and seals. These systems are highly vulnerable to disturbances, including sedimentation from human activities and coastal erosion, fluctuations in salinity from seasonal river discharge, and temperature increases from heat influx originating at lower latitudes and from atmospheric warming. Spatial isolation of these boulder fields and the slow development of benthic communities limit ecosystem recovery from disturbance. To assess the possible ecological effects of such environmental disturbances, this field program undertook an investigation of the biological communities and environmental conditions across the Stefansson Sound Boulder Patch, the largest of the Beaufort Sea nearshore boulder fields. 
 The overlying objectives of this program were to: 1) monitor incident and in situ photosynthetically active radiation (PAR), salinity, temperature, currents, and pH to define the spatial variability in annual kelp productivity and biomass; 2) characterize benthic community structure changes across environmental gradients in the Boulder Patch and 3) collect annual measurements of kelp growth in the Boulder Patch to provide a nearly continuous record of kelp growth since 1976. Within and in addition to these objectives, individual research projects were completed, using experimental approaches, timeseries analysis and historical data to gain an in depth understanding of mechanisms (past and present) that resulted in the Boulder Patch community we see today and how this community may vary in future conditions.
 These datasets here result from ecosystem studies and monitoring that took place from 1976 to 2018 at multiple site in Stefansson Sound, Alaska.
 To understand spatiotemporal variability in underwater light environment, photosyntheically active radiation (PAR, 400-700 nanometers) was measured from moorings on the benthos at multiple locations in Stefansson Sound, Alaska using LICOR spherical quantum sensors, and at an adjacent site on land for incident PAR using LICOR cosine sensors. The overall dataset spans from 1984 to 2018, though there are gaps that vary from days to multiple years, depending on the location.
DOI: 10.18739/a2j960b1g
title: Continuation of Arctic Nearshore Impact Monitoring in the Development Area (cANIMIDA) hydrography surveys in Stefansson Sound, Beaufort Sea, Alaska 2004-2006.

description: To understand spatial variation in water quality in Stefansson Sound (Beaufort Sea, Alaska), Photosynthetically Active Radiation (PAR, micromole photons per meter squared per second) at the surface, 2 and 4 meter (m) depths and light attenuation at 2 and 4 m depth, as well as temperature (degrees Celsius), salinity (Practical Salinity), dissolved oxygen (mg L-1), and pH at 2 and 4 m depths was measured at 30 sites on three occasions per year in July and August 2004, July and August 2005, and July and August 2006.
 These data were collected as part of a larger study to assess potential impacts of offshore development in Stefansson Sound.
DOI: 10.18739/a2dj58h67
title: Laminaria solidungula elongation measurements from the Boulder Patch, Beaufort Sea, Alaska, 1976-2016.

description: Linear elongation of Laminaria solidungula individuals from multiple sites was measured to assess annual productivity in the Boulder Patch kelp bed, Stefansson Sound, Alaska. These data were collected as part of a number of studies that included investigations of kelp adaptation to Arctic environments and the impact of environmental variation on kelp productivity. Annual measurements of kelp growth in the Boulder Patch to provide a nearly continuous record of kelp growth from 1976 to 2016.
 This dataset was complied from digital records and data rescue as part of a larger study to gain an in-depth understanding of mechanisms (past and present) that resulted in the Boulder Patch community we see today and how this community may vary in future conditions.
DOI: 10.18739/a2q814t07
title: Benthic community structure and colonization by functional groups in the Boulder Patch, Beaufort Sea, Alaska, 2015-2018

description: In the nearshore Alaskan Beaufort Sea, discrete, isolated rocky habitats harbor biological communities that are unusually diverse for the region, with markedly different fauna and flora than found in the surrounding soft sediment areas. The boulder fields also support tightly linked food webs, with connections to higher trophic levels such as fishes and seals. These systems are highly vulnerable to disturbances, including sedimentation from human activities and coastal erosion, fluctuations in salinity from seasonal river discharge, and temperature increases from heat influx originating at lower latitudes and from atmospheric warming. Spatial isolation of these boulder fields and the slow development of benthic communities limit ecosystem recovery from disturbance. To assess the possible ecological effects of such environmental disturbances, this field program undertook an investigation of the biological communities and environmental conditions across the Stefansson Sound Boulder Patch, the largest of the Beaufort Sea nearshore boulder fields. 
 The overlying objectives of this program were to: 1) monitor incident and in situ photosynthetically active radiation (PAR), salinity, temperature, currents, and pH to define the spatial variability in annual kelp productivity and biomass; 2) characterize benthic community structure changes across environmental gradients in the Boulder Patch and 3) collect annual measurements of kelp growth in the Boulder Patch to provide a nearly continuous record of kelp growth since 1976. Within and in addition to these objectives, individual research projects were completed, using experimental approaches, timeseries analysis and historical data to gain an in depth understanding of mechanisms (past and present) that resulted in the Boulder Patch community we see today and how this community may vary in future conditions.
 These datasets here result from ecosystem studies and monitoring that took place from 2015 to 2018 at multiple sites in Stefansson Sound, Alaska. To examine drivers of spatial differences in community structure, benthic community structure was assessed via percent cover and colonization was aessessed via settlement plates.
DOI: 10.18739/a28s4jq23
title: Arctic Nearshore Impact Monitoring in the Development Area (ANIMIDA) III: The Boulder Patch and other Kelp Communities in the Development Area. Ecosystem monitoring data collected from the Boulder Patch, Stefansson Sound, Alaska (1976-2018).

description: In the nearshore Alaskan Beaufort Sea, discrete, isolated rocky habitats harbor biological communities that are unusually diverse for the region, with markedly different fauna and flora than found in the surrounding soft sediment areas. The boulder fields also support tightly linked food webs, with connections to higher trophic levels such as fishes and seals. These systems are highly vulnerable to disturbances, including sedimentation from human activities and coastal erosion, fluctuations in salinity from seasonal river discharge, and temperature increases from heat influx originating at lower latitudes and from atmospheric warming. Spatial isolation of these boulder fields and the slow development of benthic communities limit ecosystem recovery from disturbance. To assess the possible ecological effects of such environmental disturbances, this field program undertook an investigation of the biological communities and environmental conditions across the Stefansson Sound Boulder Patch, the largest of the Beaufort Sea nearshore boulder fields. 
 The overlying objectives of this program were to: 1) monitor incident and in situ photosynthetically active radiation (PAR), salinity, temperature, currents, and pH to define the spatial variability in annual kelp productivity and biomass; 2) characterize benthic community structure changes across environmental gradients in the Boulder Patch and 3) collect annual measurements of kelp growth in the Boulder Patch to provide a nearly continuous record of kelp growth since 1976. Within and in addition to these objectives, individual research projects were completed, using experimental approaches, timeseries analysis and historical data to gain an in depth understanding of mechanisms (past and present) that resulted in the Boulder Patch community we see today and how this community may vary in future conditions.
 These datasets here result from ecosystem studies and monitoring that took place from 1976 to 2018 at multiple site in Stefansson Sound, Alaska.
DOI: 10.18739/a2513tw8n
title: Dynamic Observations of the Densification of Greenland Firn under Compression using a microcomputed X-ray tomography, June 2017

description: The present dataset includes 2-Dimensional (2-D) micro computed tomography (CT) reconstructions obtained from depths of 10-80 meters (m) firn from Summit, Greenland using the micro CT in 2017; comparison before the strain with after the strain of 4% from reconstructed 3-Dimensional (3-D) images (horizontal cross section) from the micro CT for 30 m firn specimen; stress as a function of strain for depths of 10-80 m during interrupted compressive tests; plots of density, the area-equivalent circle diameter (ECDa – a measure of the feature pore-size), the structure thickness (S.Th - a measure of the feature grain-size), total porosity, closed porosity, the specific surface area (SSA) and the structure model index (SMI - a measure of the prevalent ice curvature) respectively as a function of strain for depths of 10-80 m; grain size obtained using the micro CT as a function of depth or strain; SMI evolution with depth for before the test for depths of 10-80 m; 2-D reconstructions obtained using the micro CT 0% strain to 4% strain for the 30 m specimen; semi-empirical model for the lattice diffusion and the grain boundary diffusion, and the mean relationship between the density and stress for all tests; comparison of the density calculated from micro CT data with density obtained from measurement of the mass-volume method at each depth; the fitted linear slope of each microstructural parameter with increasing strain for depths of 10-80 m; the fitted mean density and the fraction of lattice diffusion α evaluated using the semi-empirical model under the corresponding stresses. We share this dataset with other glaciologists, material scientists, experimental geophysicists, and all other researchers and engineers in order to improve our understanding on the scientific issue of snow, firn and ice.
DOI: 10.18739/a2vm42z20
title: Road Effects at Airport Study Site, Prudhoe Bay, Alaska, Summer 2015

description: This data report contains methods and data from transects, permanent vegetation plots, and permafrost boreholes sampled in summer-fall 2015 at the Airport Site at Prudhoe Bay, Alaska, for the Arctic Science, Engineering, and Education for Sustainability (ArcSEES). The project, "Cumulative effects of Arctic oil development—planning and designing for sustainability," was funded by the National Science Foundation (NSF Grant Nr. 1233854). The study site consists of three transects located near the Deadhorse Airport. This builds on data collected in 2014 at a site near Lake Colleen. A forthcoming data report will contain additional data from both sites collected from fall 2015 to summer 2016. The main objectives of the 2014 field program were to document the extent and effects of road dust and road-related flooding to the topography, landforms, permafrost, soils and vegetation near the Spine Road—the oldest, most heavily traveled road in the Prudhoe Bay region. A full description of the project goals, methods, data and conclusions from the 2014 field season is in Alaska Geobotany Center Data Report AGC 15-01 (Walker et al., 2015). 
 Objectives of the Summer 2015 field program were similar to those in 2014, except the focus of the study was three new transects established near the Deadhorse Airport and the northern terminus of the Dalton Highway at Milepost 414. This site offers some contrasts to Colleen Site A, including extensive dry thermokarst terrain with well-developed high-centered polygons along Transect 3, located southeast of the Dalton High‐way between the road and the Sagavanirktok River, and terrain in a heavily disturbed area northwest of the road where Transect 4 was established, that is mostly continuously flooded due to drainage being blocked by the road berm. Transect 5 was established to provide better options for permafrost coring on the west side of the road, since deep flooding and gravel deposits from previous flood events prevented coring on Transect 4. Transect 5 also provides an approximate local analog of the conditions that existed prior to road construction. Data were collected on all three transects during 1-10 August and 16-23 September 2015. Another coring site, Sagavanirktok River Site 1 (SR-1), was established south of the Airport Site along the Sagavanirktok River, where local destruction of the highway caused by flooding from the Sagavanirktok River in spring 2015 created a major disturbance (Shur et al., 2016). More info: http://www.geobotany.uaf.edu/arcsees/
DOI: 10.18739/a2qv3c48n
title: Composition of aerosol in airborne particulate matter and snow at Alert, Canada 2014-2015

description: Carbonaceous aerosols are a major component of fine airborne particulate matter (PM) and play a complex role in the climate system, via their role in light scattering and absorption, cloud nucleation, and the melting of ice- and snow-covered surfaces, and in air pollution and human health. They are removed from the atmosphere via aging and dry and wet deposition.
 Over the course of one year, we simultaneously analyzed the composition of carbonaceous aerosol in both PM and snow collected at the Dr. Neil Trivett Global Atmosphere Watch Observatory at Alert, Canada. To understand the seasonal variation in the EC (elemental carbon) and OC (organic carbon) burden, we quantified the amount of total carbon (TC) and fraction of light-scattering organic carbon (OC) and light-absorbing elemental carbon (EC) with a Sunset OC/EC analyzer using the EnCan-Total-900 (ECT9) protocol.
 In addition, we measured the stable carbon value and radiocarbon content of the EC fraction to apportion it into contributions from fossil fuel combustion (gaseous, liquid, and solid fuels such as natural gas, coal, and diesel) and biomass burning (wildfires and biofuel combustion).
DOI: 10.18739/a26t0gx1p
title: Soil Analysis Treeline Summary at Agashashok River, Alaska 2016 - 2018

description: Overview: It has long been thought that temperature exerts a direct control on growth of treeline trees and the position of the treeline. However, our recent work in the Arctic with white spruce suggests that indirect effects of temperature on soil nutrient availability may be of equal or greater importance. We hypothesize that cold soils at the treeline, particularly during winter, limit microbial activity and nutrient availability to the point where trees are barely able to survive and grow. Measurements made during winter have revealed that Arctic forests maintain snowpacks that are much deeper than observed at treeline. Trees are thought to trap snow and lead to a deeper snowpack, insulating the soil from cold air and allowing for greater overwinter microbial activity and greater nutrient mineralization. Indeed, we found a strong positive correlation between white spruce growth and winter snow depth. We propose to isolate the mechanisms underlying this correlation by using snowfences to manipulate winter snow depth and fertilizer to increase soil nutrient availability at three treelines that differ in soil moisture. To provide an experimental test of the importance of temperature as a direct control on treeline tree growth, we propose to incorporate experimental shoot warming into our snowfence experiment in a factorial design. We predict that both experimental snow and nutrient additions will lead to large increases in microbial activity, photosynthesis, tree growth, seed quality, seed production, seedling establishment and recruitment of new trees. We expect to observe the greatest positive responses where soils are wet and cold. Meanwhile, we predict that shoot warming will lead to negligible changes in growth. This research will elucidate the relationship between snow depth and soil nutrient availability, and determine the relative importance of nutrient and temperature limitations at treeline to white spruce – a dominant member of the boreal forest and the northernmost tree species in North America. Intellectual Merit: The position of the Arctic treeline is an important regulator of surface energy budgets, carbon cycling and subsistence resources in high latitude environments. Our recent research provides correlative evidence of the importance of winter snow depth as a driver of tree growth. Here, we propose to experimentally isolate the importance of snow depth and soil nutrient availability and examine the consequences for microbial processes and tree performance. This is a novel proposal, as we aim to link microbial ecology with large-scale landscape patterns of relevance to regional and global climates. If our hypotheses are confirmed, our findings will contradict the prevailing theory of treeline causation, alter our predictions of where and when treelines may advance and necessitate revision of the many paleoclimate reconstructions based upon correlations between temperature and tree growth near the Arctic treeline.