The relative frequencies of pollen from Sanjiaolongwan maar lake over 1000 years

Published: 10-03-2018| Version 1 | DOI: 10.17632/7rj8j2j3sg.1
Contributor:
Jie Li

Description

Pollen sample assemblage data from the maar lake Sanjiaolongwan in northeastern China. Data is provided as the relative frequencies of pollen taxa.

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Most of the core was analyzed for pollen analysis at a 1-cm interval and in some places a 0.5-cm interval was used (total of 64 samples). Sediments samples were prepared using standard methods. Approximately 0.3 g of each sample was treated sequentially with 10% HCl, 10% KOH, HF and then with HCl, followed by ultrasonic sieving (mesh size 5 m). A known quantity of Lycopodium spores was added as an exotic marker before acid maceration. Slides were made with glycerin jelly with a wax seal, and stored in the State Key Laboratory of Biogeology and Environmental Geology of China University of Geosciences. Pollen and spores were identified and counted with a Nikon light microscope at ×400-1000 magnification. The 800-1000 terrestrial pollen grains were identified and counted for each sample. Pollen percentages were calculated based on the sum of total terrestrial pollen and were plotted using C2, version 1.5.