Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Leipe, Christian; Kobe, Franziska; Müller, Stefanie (2018): Pollen counting results. PANGAEA, https://doi.org/10.1594/PANGAEA.885267, Supplement to: Leipe, C et al. (2019): Testing the performance of sodium polytungstate and lithium heteropolytungstate as non-toxic dense media for pollen extraction from lake and peat sediment samples. Quaternary International, 516, 207-214, https://doi.org/10.1016/j.quaint.2018.01.029

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Pollen analysis is one of the most important methods to reconstruct past climate change and to understand prehistoric and early historic human-environment interactions. Every study based on fossil pollen assemblages from sedimentary archives starts with the preparation of collected sample material. The most widely employed protocols to concentrate pollen involve the use of several chemicals including hydrofluoric acid (HF), which is extremely hazardous to human health. As an alternative to HF, we have tested the reliability of dense media separation using two non-toxic substances, sodium polytungstate (SPT) and lithium heteropolytungstate (LST). Our test, which is based on five different samples representing different palaeoenvironmental archives partly revealed statistical disagreement between HF-treated samples and those treated by SPT and LST. In most cases, the observed differences in taxa proportions of the SPT and LST samples are unidirectional. In general, they do not appear to be pollen-taxa-specific but sample-specific thus probably linked to properties associated with the respective study material. However, sample comparison indicates that SPT-based dense media separation produces pollen concentrates that are statistically more comparable to those obtained by protocols based on HF-treatment. Discrepancies between both methods were also recognised for pollen concentrations and generally support the sample-specific character of dense media separation performance as suggested by the pollen proportion comparison. To verify the observed significant differences in pollen proportions and concentrations and to understand the factors that control them, further studies based on a larger number of test samples are required. In addition, we evaluated the effect of ultrasonic-aided fine sieving to bi-saccate pollen types. Our results indicate that this commonly used method to remove clays may lead to fragmentation of bi-saccate pollen into corpora and sacci thus making identification more complicated. Although more time-consuming, we recommend to use less destructive differential centrifugation as an alternative, if indicated by preliminary tests.
Coverage:
Median Latitude: 46.885688 * Median Longitude: 89.371266 * South-bound Latitude: 32.929440 * West-bound Longitude: 14.533000 * North-bound Latitude: 52.783000 * East-bound Longitude: 141.033000
Size:
15 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. Leipe, C; Kobe, F; Müller, S (2018): Confidence intervals (0.95) for absolute counts of pollen taxa comprising >5% of the total pollen sum of TS IV samples, Eemian basin Jänschwalde. https://doi.org/10.1594/PANGAEA.885249
  2. Leipe, C; Kobe, F; Müller, S (2018): Absolute pollen counts for TS IV samples, Eemian basin Jänschwalde. https://doi.org/10.1594/PANGAEA.885256
  3. Leipe, C; Kobe, F; Müller, S (2018): Pollen proportions for TS IV samples, Eemian basin Jänschwalde. https://doi.org/10.1594/PANGAEA.885261
  4. Leipe, C; Kobe, F; Müller, S (2018): Confidence intervals (0.95) for absolute counts of pollen taxa comprising >5% of the total pollen sum of TS II samples, Lake Kotokel. https://doi.org/10.1594/PANGAEA.885250
  5. Leipe, C; Kobe, F; Müller, S (2018): Absolute pollen counts for TS II samples, Lake Kotokel. https://doi.org/10.1594/PANGAEA.885257
  6. Leipe, C; Kobe, F; Müller, S (2018): Pollen proportions for TS II samples, Lake Kotokel. https://doi.org/10.1594/PANGAEA.885263
  7. Leipe, C; Kobe, F; Müller, S (2018): Confidence intervals (0.95) for absolute counts of pollen taxa comprising >5% of the total pollen sum of TS V samples, Lake Kushu. https://doi.org/10.1594/PANGAEA.885251
  8. Leipe, C; Kobe, F; Müller, S (2018): Absolute pollen counts for TS V samples, Lake Kushu. https://doi.org/10.1594/PANGAEA.885259
  9. Leipe, C; Kobe, F; Müller, S (2018): Pollen proportions for TS V samples, Lake Kushu. https://doi.org/10.1594/PANGAEA.885265
  10. Leipe, C; Kobe, F; Müller, S (2018): Confidence intervals (0.95) for absolute counts of pollen taxa comprising >5% of the total pollen sum of TS I samples, Okunevoe peat bog. https://doi.org/10.1594/PANGAEA.885252
  11. Leipe, C; Kobe, F; Müller, S (2018): Absolute pollen counts for TS I samples, Okunevoe peat bog. https://doi.org/10.1594/PANGAEA.885258
  12. Leipe, C; Kobe, F; Müller, S (2018): Pollen proportions for TS I samples, Okunevoe peat bog. https://doi.org/10.1594/PANGAEA.885264
  13. Leipe, C; Kobe, F; Müller, S (2018): Confidence intervals (0.95) for absolute counts of pollen taxa comprising >5% of the total pollen sum of TS III samples, Tso Moriri. https://doi.org/10.1594/PANGAEA.885253
  14. Leipe, C; Kobe, F; Müller, S (2018): Absolute pollen counts for TS III samples, Tso Moriri. https://doi.org/10.1594/PANGAEA.885260
  15. Leipe, C; Kobe, F; Müller, S (2018): Pollen proportions for TS III samples, Tso Moriri. https://doi.org/10.1594/PANGAEA.885266