Vegetation, recent pollen deposition, and distribution of some non-pollen palynomorphs in a degrading ice-wedge polygon mire complex near Pokhodsk (NE Siberia), including size-frequency analyses of pollen attributable to Betula (original) (raw)
Related papers
Boreas, 2009
Fine-scaled distribution patterns of vegetation and palynomorphs in a polygon mire in NE Siberia were studied in 31Â31 plots of 1 m 2 (vegetation) and along a transect at intervals of 1 m (palynomorphs). Pollen and non-pollenpalynomorph contents clearly reflect differences between polygon ridges and centres. For most single pollen types, however, no unambiguous relation with actual plant abundances and distribution exists. High pollen values are restricted to the immediate vicinity of the pollen sources, which is attributed to the low height of the vegetation. For several plant taxa, high pollen values were found to be restricted to particular plant specimens in the population. High values of pollen ascribed to taxa currently absent at the relevant plot show that the sampled mosses contain a pollen signal of several years. Betula exilis produces two morphologically clearly distinct pollen types. The distribution of selected non-pollen palynomorphs correlates to microrelief, moisture regime and/or trophic conditions. The study shows that single palaeo-sections from arctic peatlands should not be over-interpreted with respect to their palaeoecological value. Local vegetation types and site conditions, however, can be accurately reconstructed from the total assemblages and from combined occurrences of specific palynomorph types.
Pollen morphology of selected tundra plants from the high Arctic of Ny-Ålesund, Svalbard
ADVANCES IN POLAR SCIENCE, 2012
Documenting morphological features of modern pollen is fundamental for the identification of fossil pollen, which will assist researchers to reconstruct the vegetation and climate of a particular geologic period. This paper presents the pollen morphology of 20 species of tundra plants from the high Arctic of Ny-Ålesund, Svalbard, using light and scanning electron microscopy. The plants used in this study belong to 12 families: Brassicaceae, Caryophyllaceae, Cyperaceae, Ericaceae, Juncaceae, Papaveraceae, Poaceae, Polygonaceae, Ranunculaceae, Rosaceae, Salicaceae, and Scrophulariaceae. Pollen grain shapes included: spheroidal, subprolate, and prolate. Variable apertural patterns ranged from 2-syncolpate, 3-colpate, 3-(-4)-colpate, 3-(-5)-colpate, 3-colporate, 5-poroid, ulcerate, ulcus to pantoporate. Exine ornamentations comprised psilate, striate-perforate, reticulate, microechinate, microechinate-perforate, scabrate, granulate, and granulate-perforate. This study provided a useful reference for comparative studies of fossil pollen and for the reconstruction of paleovegetation and paleoclimate in Svalbard region of Arctic.
Pollen identified in precipitation fallen in the south of West Siberia in 2019
2020
The paper presents the results of the microscopic analysis of solid precipitation (snow) sampled from three key areas located in neighboring nival-glacial systems at the beginning of the cold period in 2019-2020 (November, December). Pollen of Pinus sp., Betula sp. belonging to Asteraceae, Chenopodiaceae, Poaceae families was found in the snow samples. The samples collected simultaneously from three key area on December 7, 2019 displayed 4 taxa out of 5 identified during the entire analyzed period as well as territories which pollen could be transferred from were identified. According to the backward air-mass trajectories calculation (HYSPLIT model), the analysis of constant pressure maps and snow distribution maps, these territories were located to the south of the key testing sites.
Ecological Questions, 2017
The paper presents the results of studies of 270 modern pollen assemblages from different vegetation zones of the East European plain. According to obtained data the ratio of the main components in pollen assemblages from forest and forest-steppe localities is characterized by higher proportion of the regional components (e.g., Betula, Alnus, Pinus) and significantly lower participation of Picea pollen and one of deciduous trees then the proportions of these species in the surrounding vegetation. Steppe vegetation is determined by higher share of non-arboreal pollen and specific floristic composition. The comparison between geographical range of tree species and maps showing distribution of their pollen show a possibility a long distance transfer of Carpinus and Fagus pollen while pollen of Quercus and Tilia occurred close to their modern geographical ranges.
Frontiers in Ecology and Evolution
Modern pollen–vegetation–climate relationships underpin palaeovegetation and palaeoclimate reconstructions from fossil pollen records. East Siberia is an ideal area for investigating the relationships between modern pollen assemblages and near natural vegetation under cold continental climate conditions. Reliable pollen-based quantitative vegetation and climate reconstructions are still scarce due to the limited number of modern pollen datasets. Furthermore, differences in pollen representation of samples from lake sediments and soils are not well understood. Here, we present a new pollen dataset of 48 moss/soil and 24 lake surface-sediment samples collected in Chukotka and central Yakutia in East Siberia. The pollen–vegetation–climate relationships were investigated by ordination analyses. Generally, tundra and taiga vegetation types can be well distinguished in the surface pollen assemblages. Moss/soil and lake samples contain generally similar pollen assemblages as revealed by a ...
Pollen- and Non Pollen Palynomorphs- Analyses from Svalbard
Czech Polar Reports
We analysed fifteen samples of a shallow profile “Sverrefjellet Volcano “, located in the NW part of Svalbard – Bockfjord region (see Fig.1). Frequency of pollen grains, spores and NPP (Non Pollen Palynomorphs) was quite low. Only the local taxa (e.g. Salix and Cyperaceae) produced pollen in greater abundance. The pollen spectrum was considerably varied, although pollen grains and spores of most taxa were present in low abundances. This was due to low pollen and spores productivity of the Arctic flora, which propagates mostly in a vegetative way. To obtain as much information from the profile under study as possible, we analysed the non- pollen palynomorphs as well. We succeeded above all in determination of eggs, buccal tubes and claws of the Tardigrada phylum (Jankovská 1991). The determination has been recently verified by specialists in the field, prof. L. Kaczmarek and dr. M. Roszkowska (in Jankovská et al. 2016). The results of the pollen- and NPP analysis are presented in pol...
Micro-scale patterns of modern pollen deposition within three alpine plant communities*
New Phytologist, 1996
Few studies have examined patterns of pollen deposition or the relationship between vegetation and pollen assemblages at the small scale. This paper examines the representation of both individual taxa and whole plant communities in modern pollen spectra. Micro-scale variations in modern pollen deposition were studied in three alpine plant communities on Storbreen glacier foreland, southern Norway: a pioneer community; a 5a/ij:-shrub community; and an ericaceous heath community. The relationships between vegetation and modern pollen deposition and the variability of these relationships at the local scale were investigated within 16 >: I m^-quadrats. The data were classified using two-wa}-indicator-species ana]>'sis (TWINSPAN) and ordinated usin^ dftrendedcorrespondence analysis (DCA). In addition, the pollen and vegetation data were ordinated simultaneously, using canonical correspondence analysis (CCA). The efTect of removing arboreal pollen from the pollen sum was examined. The three plant communities were distinguished successfully by multivariate statistical techniques, using both pollen data and vegetation data. However, within the communities there was high variability in pollen deposition, which was most pronounced in the 5i3//s'-shrub community. The abundance of indi\ idual taxa in the vegetation was compared with their representation in the pollen spectra. The strongest relationships were shown by Salix, Ericales, Empetritm and Lycopodium. Certain taxa showed consistent, reproducible patterns of behaviour. These patterns provided valuable evidence for separating contrasting plant communities. Comparison of modern poiien-vegetation relationships of this kind with pollen data from Holocene and Pleistocene sites is important to improve the reconstruction of past plant communities. Statistical analyses showed that for the majority of taxa a moss polster consisting of 20 subsamples was necessary to reduce the effect of microscaie variability in this environment to acceptable levels.
Ecological Questions
The first results of modern pollen investigations from western slop of Ural Mountains presented. 33 modern pollen samples have been collected in June 2016 from four dominant forest types (Sphagnum, true moss, tall fern and tall herbs sections) in Pechora-Ilych state nature biosphere reserve (Komi republic, Russia). The detail record of surrounding vegetation was performed at every sampling point. Pollen assemblages are mostly dominated by tree pollen (Betula type, Pinus haploxylon type and Picea). The pollen assemblages and vegetation records will be statistically analyzed (clustering and correspondence analysis) to investigate how vegetation is reflected in pollen assemblages and for producing new series of PPEs.