1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research - Germany
2 Institute for Earth and Environmental Science of the University of Potsdam - Germany
3 Department of Geography and Biology of Northeastern Federal University Yakutsk - Russia
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Potsdam
Telegrafenberg A43 14473 Potsdam
Telefon +49-331-288-2218 www.awi.de
MacDonald GM, Velichko AA, Kremenetski C V., Borisova OK, Goleva AA, Andreev AA, et al. (2000) Holocene treeline history
and climate change across northern Eurasia. Quaternary Research 53(3): 302–311
Klemm J, Herzschuh U, Pisaric MFJ, Telford RJ, Heim B and Pestryakova L a. (2013) A pollen-climate transfer function from the
tundra and taiga vegetation in Arctic Siberia and its applicability to a Holocene record. Palaeogeography, Palaeoclimatology,
Palaeoecology 386: 702–713.
Sjögren, P., van der Knaap, W. O., Huusko, A., & van Leeuwen, J. F. N. (2008). Pollen productivity, dispersal, and correction
factors for major tree taxa in the Swiss Alps based on pollen-trap results. Review of Palaeobotany and Palynology, 152(3-4), 200–210.
Beug H-J (2004) Leitfaden der Pollenbestimmung. München: Verlag Dr. Friedrich Pfeil, 542.
Moore PD, Webb JA and Collinson ME (1991) Pollen Analysis. Oxford: Blackwell Scientific Publications, 216.
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Bastian Niemeyer , Ulrike Herzschuh , Luidmila Pestryakova
Classification Frequency [%]
Double-layered,
granular cell wall 87
Pseudo-Bacculae 97
Granular patches 86
Foldings Fissures
(broken pollen)
Disregarding morphological diversity - a Larix issue?
Table 2: The amount of fully preserved grains is small and complicates the determination of the real quantity of Larix pollen
Table 1: Percentages of features found in a total of 185 Larix fragments.
*only based on fraction types „half“ and „full“
Introduction
Pollen bearing larches (Fig.1) at the Siberian treeline (Fig.2) are seldom,
but also lacustrine sediments contain very low amounts of Larix pollen, which is contrary to
the high larix coverage around arctic lakes. This underrepresentation of Larix pollen is known, but not entirely understood.
Our objectives are (1) to find morphological features that can be used for correct Larix identification and (2) to infer the ratio of unbroken pollen grains
Frequencies of morphological features do vary (Tab.1)
Ratio equals a concentration of ~220 pollen/mL (Betula ~ 2550 pollen/mL) Commonly used feature folding (Fig.3) is rarely present
Grains tend to break in various pieces (Tab.2)
Results
Larix grains show a variable combination of morphological features
Frequency of full grains is small, compared to the quantity of fragments in a sample A closer look may help to reflect the actual pollen load more accurately
Pollen accumulation (40 pollen/yr) is very low and deduction of vegetation is complicated
Conclusions
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F
i g u r e 2 r d e r
: I m p re s s i o n o f a s in g le la r c h t r e e a t t h e t r e e il n e b o
Methods
We analyzed 185 fragments of Larix pollen grains of 12 samples from 4 different sites (Siberian Arctic, East Germany and Central Germany).
We recorded the presence/absence of 5 morphological features of each individual fragment
Fraction type
Frequency [%]
part 37
half 27
full 36
27*
2 38
3
4 1
2 3 4 5
Contact: bastian.niemeyer@awi.de
