Shala, Shyhrete; Helmens, Karin; Engels, Stefan; Kuhry, Peter; Kylander, Malin E; Luoto, Tomi P; Salonen, Sakari; Väliranta, Minna; Weckström, Jan (2025): Pollen counts for the Holocene sediment sequence retrieved from Lake Loitsana, Finland [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.975099
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Published: 2025-02-13 • DOI registered: 2025-03-14
Abstract:
This dataset provides counts the pollen counts for the Holocene sediment sequence retrieved from Lake Loitsana (Finland) in 2008. Counts per taxon are presented against both depth (m) and age (cal ka. BP); sample volume, the number of Lycopodium tablets added during sample preparation, the number of Lycopodium spores per tablet, and the number of Lycopodium spores encountered during analysis are also presented. Two age/depths models are presented: the first model represents the original age/depth model applied to the records (Shala et al., 2014; 2017) and the second age/depth model, which is the author-preferred version, presents updated age-estimates derived using the r package 'Bacon' (Blaauw and Christensen, 2011). The pollen dataset provides information on terrestrial and aquatic vegetation dynamics (Salonen et al., 2013). A total of 55 samples was analysed, with samples prepared using standard KOH, HF and acetolysis treatments and counted using a light microscope (400× magnification). Non-pollen palynomorphs and conifer stomata were also counted from the pollen slides.
Keyword(s):
References:
Blaauw, Maarten; Christen, Andrés (2011): Flexible paleoclimate age-depth models using an autoregressive gamma process. Bayesian Analysis, 6(3), 457-474, https://doi.org/10.1214/11-BA618
Salonen, J Sakari; Helmens, Karin F; Seppä, Heikki; Birks, H John B (2013): Pollen-based palaeoclimate reconstructions over long glacial–interglacial timescales: methodological tests based on the Holocene and MIS 5d–c deposits at Sokli, northern Finland. Journal of Quaternary Science, 28(3), 271-282, https://doi.org/10.1002/jqs.2611
Shala, Shyhrete; Helmens, Karin F; Luoto, Tomi P; Salonen, J Sakari; Väliranta, Minna; Weckström, Jan (2017): Comparison of quantitative Holocene temperature reconstructions using multiple proxies from a northern boreal lake. The Holocene, 27(11), 1745-1755, https://doi.org/10.1177/0959683617708442
Shala, Shyhrete; Helmens, Karin F; Luoto, Tomi P; Väliranta, Minna; Weckström, Jan; Salonen, J Sakari; Kuhry, Peter (2014): Evaluating environmental drivers of Holocene changes in water chemistry and aquatic biota composition at Lake Loitsana, NE Finland. Journal of Paleolimnology, https://doi.org/10.1007/s10933-014-9795-1
Funding:
Coverage:
Latitude: 67.804722 * Longitude: 29.282222
Date/Time Start: 2008-04-05T10:00:00 * Date/Time End: 2008-04-06T18:00:00
Minimum DEPTH, sediment/rock: 0.010 m * Maximum DEPTH, sediment/rock: 8.825 m
Event(s):
Comment:
Further funding was provided by SKB (Swedish Nuclear Fuel and Waste Management Company) and the Bolin Centre for Climate Research.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Engels, Stefan | Geocode | |
| 2 | Age model | Age model | ka | Engels, Stefan | Calculated, according to Shala et al. (2017) | |
| 3 | Age model | Age model | ka | Engels, Stefan | Calculated according to Blaauw and Christen (2011) | |
| 4 | Betula nana | Bet.n | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 5 | Betula pendula | Bet.p | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 6 | Betula undifferentiated | Bet.ud | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 7 | Abies | Abi | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 8 | Alnus | Aln | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 9 | Carpinus | Car | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 10 | Fraxinus | Frx | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 11 | Juniperus | Jun | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 12 | Picea | Pic | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 13 | Pinus | Pin | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 14 | Populus | Pop | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 15 | Tilia | Til | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 16 | Ulmus | Ulm | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 17 | Anthemis-type | Ant-T | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 18 | Artemisia | Art | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 19 | Aster-type | Ast-T | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 20 | Cannabis/Humulus-type | Can/Hum-T | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 21 | Corylus | Cor | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 22 | Poaceae | Poac | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 23 | Carex-type | Car-T | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 24 | Rosaceae | Rosae | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 25 | Salix | Sal | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 26 | Chenopodiaceae | Cheae | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 27 | Potentilla | Pti | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 28 | Caryophyllaceae | Cphae | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 29 | Ericaceae | Eriae | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 30 | Rumex acetosa | Rum.a | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 31 | Rumex acetosella | Rum.a | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 32 | Rumex undifferentiated | Rum.ud | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 33 | Ranunculaceae | Ranae | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 34 | Polygonum bistorta-type | Pol.b-T | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 35 | Brassicaceae | Braae | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 36 | Filipendula | Flp | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 37 | Epilobium | Epl | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 38 | Cirsium-type | Cir-T | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 39 | Galium | Gal | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 40 | Thalictrum | Tha | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 41 | Lactuceae | Lactuceae | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 42 | Apiaceae | Apiae | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 43 | Alchemilla | Alc | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 44 | Calluna vulgaris | Cal.v | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 45 | Ambrosia | Amb | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 46 | Persicaria amphibia | Per.a | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 47 | Viola palustris-type | Vio.p-T | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 48 | Sambucus-type | Sam-T | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 49 | Trollius europaeus-type | Tro.e-T | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 50 | Linnaea borealis | Lnn.b | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 51 | Dryopteris-type | Drp-T | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 52 | Athyrium-type | Aty-T | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 53 | Lycopodium | Lyc | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | Lycopodium annotinum |
| 54 | Lycopodium | Lyc | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | Lycopodium clavatum |
| 55 | Lycopodium | Lyc | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | Lycopodium unidentified |
| 56 | Equisetum | Equ | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 57 | Diphasiastrum | Dipt | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 58 | Huperzia selago | Hup.s | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 59 | Cryptogramma crispa | Crp.c | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 60 | Sphagnum | Sph | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 61 | Tilletia | Tit | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 62 | Nuphar | Nup | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 63 | Nymphaea | Nym | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 64 | Myriophyllum alterniflorum | Myo.a | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 65 | Myriophyllum spicatum | Myo.s | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 66 | Potamogeton | Pot | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 67 | Typha latifolia | Typ.l | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 68 | Hippuris vulgaris | Hip.v | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 69 | Charcoal, particles | Char part | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 70 | Botryococcus | Bot | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 71 | Glomus | Glomus | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 72 | Pediastrum | Pdi | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 73 | Palynomorpha, non-pollen | NPP | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | HdV-Type1 |
| 74 | Palynomorpha, non-pollen | NPP | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | HdV-Type128 |
| 75 | Palynomorpha, non-pollen | NPP | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | HdV-Type129 |
| 76 | Palynomorpha, non-pollen | NPP | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | HdV-Type132 |
| 77 | Palynomorpha, non-pollen | NPP | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | HdV-Type210 |
| 78 | Palynomorpha, non-pollen | NPP | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | HdV-Type217 |
| 79 | Palynomorpha, non-pollen | NPP | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | HdV-Type225 |
| 80 | Palynomorpha, non-pollen | NPP | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | HdV-Type315 |
| 81 | Palynomorpha, non-pollen | NPP | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | HdV-Type340 |
| 82 | Palynomorpha, non-pollen | NPP | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | HdV-Type560 |
| 83 | Pinus, stomata | Pis.s | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 84 | Pollen, undifferentiated | Pollen.ud | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 85 | Sample volume | Samp vol | cm3 | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 86 | Lycopodium (added) | Lyc(ad) | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 87 | Lycopodium spores per tablet | Lyc.tab | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] | |
| 88 | Lycopodium (counted) | Lyc(ct) | # | Engels, Stefan | Light microscope, Zeiss [1000x magnification] |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
4773 data points
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