Lehmann, Linnea; Andreev, Andrei A; Herzschuh, Ulrike; Kruse, Stefan: Moss/soil-derived surface pollen percentages from Northwestern Canada and Alaska spanning multiple ecoregions (2022–2024) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.995774 (dataset in review)
Abstract:
A total of 70 surface samples were collected from Northwestern Canada and Alaska in the American-German Cooperation Expeditions to North America in 2022, 2023 and 2024: 32 surface samples were collected in 2022, 23 samples were collected in 2023 and 15 samples were collected in 2024. All originate from moss/soil pollsters. Coordinates of the sampling sites were obtained by hand-held Global Positioning System (GPS). The altitudes of the sampling sites range from 20 to 1704 m above sea level. At least 300 terrestrial pollen and spore grains were counted and identified in each sample under a microscope at 400X using published pollen atlases and identification keys. Pollen percentages were calculated based on the total number of terrestrial pollen grains. Ecoregions, including Boreal Forest/Taiga, Temperate Conifer Forests and Tundra, of each sampling site were extracted from a 1:30 million scale vegetation map for the land area. The fieldwork was planned and carried out by researchers from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI). It took place in the summers of 2022, 2023 and 2024.
Related to:
Lehmann, Linnea; Andreev, Andrei A; Herzschuh, Ulrike; Kruse, Stefan: Moss/soil-derived surface pollen counts from Northwestern Canada and Alaska spanning multiple ecoregions (2022–2024) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.995450
Funding:
German Research Foundation (DFG), grant/award no. 563037533: Assessing stability of topographic impacts on northern boreal forest carbon allocation across the Tundra-Taiga Ecotone amid climate crisis (BToBE)
Coverage:
Median Latitude: 64.281002 * Median Longitude: -147.277481 * South-bound Latitude: 58.750380 * West-bound Longitude: -164.972257 * North-bound Latitude: 68.879650 * East-bound Longitude: -121.832340
Date/Time Start: 2022-07-20T00:00:00 * Date/Time End: 2024-07-10T00:00:00
Minimum DEPTH, soil: 0 m * Maximum DEPTH, soil: 0 m
Event(s):
EN22006 * Latitude: 68.725850 * Longitude: -133.532910 * Date/Time: 2022-07-20T00:00:00 * Elevation: 117.0 m * IGSN: https://doi.org/10.60510/AWFWI02065 * Location: Northwest Territories, Canada * Campaign: CA-Land_2022_NWCanada_Forests (Forest Change Northwest Canada) * Basis: AWI Arctic Land Expedition * Method/Device: Vegetation survey (VEGSUR) * Comment: Black spruce forest island
EN22007 * Latitude: 68.879650 * Longitude: -133.530910 * Date/Time: 2022-07-20T00:00:00 * Elevation: 55.0 m * IGSN: https://doi.org/10.60510/AWFWI02066 * Location: Northwest Territories, Canada * Campaign: CA-Land_2022_NWCanada_Forests (Forest Change Northwest Canada) * Basis: AWI Arctic Land Expedition * Method/Device: Vegetation survey (VEGSUR) * Comment: Shrub tundra with Alnus
EN22021 * Latitude: 67.388820 * Longitude: -134.216870 * Date/Time: 2022-07-21T00:00:00 * Elevation: 62.0 m * IGSN: https://doi.org/10.60510/AWFWI02080 * Location: Northwest Territories, Canada * Campaign: CA-Land_2022_NWCanada_Forests (Forest Change Northwest Canada) * Basis: AWI Arctic Land Expedition * Method/Device: Vegetation survey (VEGSUR) * Comment: East slope white tall spruce individuals in an ocean of black spruce stands in the lower parts
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Kruse, Stefan | |||
| 2 | Campaign | Campaign | Kruse, Stefan | |||
| 3 | Sample type | Samp type | Kruse, Stefan | Device | ||
| 4 | Sample number | Sample no | Kruse, Stefan | |||
| 5 | Ecoregion | Ecoregion | Kruse, Stefan | Esri (2017) | ||
| 6 | Location | Location | Kruse, Stefan | |||
| 7 | LONGITUDE | Longitude | Kruse, Stefan | Geocode | ||
| 8 | LATITUDE | Latitude | Kruse, Stefan | Geocode | ||
| 9 | DEPTH, soil | Depth soil | m | Kruse, Stefan | Geocode | |
| 10 | Picea | Picea | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 11 | Pinus | Pinus | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 12 | Alnus | Alnus | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 13 | Betula | Betula | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 14 | Ericaceae | Ericac | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 15 | Poaceae | Poac | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 16 | Artemisia | Artemisia | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 17 | Epilobium | Epl | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 18 | Cyperaceae | Cyperac | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 19 | Caryophyllaceae | Cphae | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 20 | Valeriana | Val | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 21 | Salix | Salix | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 22 | Ranunculaceae | Ranae | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 23 | Rubus chamaemorus | Rub.c | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 24 | Rosaceae | Rosae | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 25 | Brassicaceae | Brassicac | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 26 | Asteraceae | Asterac | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 27 | Typha | Typha | % | Lehmann, Linnea | Counting, palynology | spore counts not included |
| 28 | Sphagnum | Sph | % | Lehmann, Linnea | Counting, palynology | |
| 29 | Lycopodium | Lyc | % | Lehmann, Linnea | Counting, palynology | |
| 30 | Polypodiaceae | Polypo | % | Lehmann, Linnea | Counting, palynology | |
| 31 | Equisetum | Equ | % | Lehmann, Linnea | Counting, palynology | |
| 32 | Botrychium | Bot | % | Lehmann, Linnea | Counting, palynology | |
| 33 | Glomus | Glomus | % | Lehmann, Linnea | Counting, palynology | |
| 34 | Spores | Spo | # | Lehmann, Linnea | Counting, palynology | Sum of spores in sample |
| 35 | Pollen | Pollen | # | Lehmann, Linnea | Counting, palynology | Sum of pollen grains in sample |
| 36 | Pollen and spores | Pollen+spores | # | Lehmann, Linnea | Counting, palynology | Sum of pollen and spores in sample |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
960 data points