A New Design of Pollen Trap for Modern Pollen Studies

Moss polsters were collected at 15 sites between Toronto and Lake Timagami, Ontario, and at 4 localities in the Lake Timagami area for the purpose of determining the regional pollen rain and its local variations. Pollen percentages of Acer, Quercus, Ambrosia, Chenopodiaceae, Compositae, and Gramineae decrease northward and Picea, Pinus, and Betula increase at the more northerly sites. From the three most northern sites a regional pollen rain was calculated by averaging the percentages from nine pollen spectra. In this area the regional pollen rain is dominated by Picea (15%), Pinus (38%), and Betula (22%). At one site a grain of Ephedra was recovered, apparently carried in by long range drift. The nearest place that it grows naturally is in the southwestern United States. Various pollen trap types were investigated and it was found that all types of moss polsters and some types of decaying stumps (depending on their moisture-holding capacity) were effective in preserving the modern pollen rain.

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Developing a modern pollen-climate calibration data set for Norway

Boreas ◽

10.1111/j.1502-3885.2010.00158.x ◽

2010 ◽

Vol 39 (4) ◽

pp. 674-688 ◽

Cited By ~ 25

Author(s):

ANNE E. BJUNE ◽

H. JOHN B. BIRKS ◽

SYLVIA M. PEGLAR ◽

ARVID ODLAND

Keyword(s):

Calibration Data ◽

Data Set ◽

Modern Pollen ◽

Calibration Data Set

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Bias and signal distortion in using a modern pollen-climate calibration set to infer a Minnesota pre-European-settlement paleoclimate record

Quaternary International ◽

10.1016/j.quaint.2015.01.174 ◽

2015 ◽

Vol 387 ◽

pp. 146

Author(s):

Jeannine-Marie St. Jacques ◽

Brian F. Cumming ◽

D.J. Sauchyn ◽

John P. Smol

Keyword(s):

Signal Distortion ◽

European Settlement ◽

Modern Pollen

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A simple yet efficient pollen trap for use in vegetation studies

Journal of Vegetation Science ◽

10.2307/3235691 ◽

1992 ◽

Vol 3 (2) ◽

pp. 275-276 ◽

Cited By ~ 20

Author(s):

Mark B. Bush

Keyword(s):

Pollen Trap

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Pollen Taphonomy in a Canyon Stream

Quaternary Research ◽

10.1016/0033-5894(87)90006-8 ◽

1987 ◽

Vol 28 (3) ◽

pp. 393-406 ◽

Cited By ~ 51

Author(s):

Patricia L. Fall

Keyword(s):

Surface Soil ◽

Pollen Grains ◽

Close Correlation ◽

Soil Samples ◽

Alluvial Deposits ◽

Modern Pollen ◽

Pollen Types ◽

Pollen Rain ◽

Arid Steppe ◽

Turbulent Water

AbstractSurface soil samples from the forested Chuska Mountains to the arid steppe of the Chinle Valley, Northeastern Arizona, show close correlation between modern pollen rain and vegetation. In contrast, modern alluvium is dominated by Pinus pollen throughout the canyon; it reflects neither the surrounding floodplain nor plateau vegetation. Pollen in surface soils is deposited by wind; pollen grains in alluvium are deposited by a stream as sedimentary particles. Clay-size particles correlate significantly with Pinus, Quercus, and Populus pollen. These pollen types settle, as clay does, in slack water. Chenopodiaceae-Amaranthus, Artemisia, other Tubuliflorae, and indeterminate pollen types correlate with sand-size particles, and are deposited by more turbulent water. Fluctuating pollen frequencies in alluvial deposits are related to sedimentology and do not reflect the local or regional vegetation where the sediments were deposited. Alluvial pollen is unreliable for reconstruction of paleoenvironments.

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Tree line shifts, changing vegetation assemblages and permafrost dynamics on Galdhøpiggen (Jotunheimen, Norway) over the past ~4400 years

The Holocene ◽

10.1177/09596836211066591 ◽

2021 ◽

pp. 095968362110665

Author(s):

Helen Hallang ◽

Cynthia A Froyd ◽

John F Hiemstra ◽

Sietse O Los

Keyword(s):

Scots Pine ◽

Late Holocene ◽

Accumulation Rate ◽

Climatic Changes ◽

Climatic Conditions ◽

Tree Line ◽

Peat Core ◽

Modern Pollen ◽

Modern Analogue ◽

Downy Birch

An environmental reconstruction based on palynological evidence preserved in peat was carried out to examine late-Holocene alpine tree line dynamics in the context of past climatic changes on Galdhøpiggen (Jotunheimen, southern Norway). We analysed a peat core taken from a mire at the present-day tree line (1000 m a.s.l.), c. 450 m downslope from the lower limit of sporadic permafrost. We adopted a combination of commonly used indicators of species’ local presence to reconstruct past vegetation assemblages, such as the relative pollen abundance (%), pollen accumulation rate (PAR), and presence of indicator species. Additionally, fossil pollen from the peat sequence was compared to modern pollen from a surface moss polster to establish a modern analogue. The results were compared with studies covering the late-Holocene climatic changes in the area. The reconstruction demonstrates that a pine-dominated woodland reached above the present-day tree line at c. 4300 cal. yr BP, suggesting a warmer climate suitable for Scots pine ( Pinus sylvestris) growth at this altitude. Scots pine retreated to lower altitudes between c. 3400 and 1700 cal. yr BP, accompanied by the descent of the low-alpine shrub-dominated belt, in response to cooling climatic conditions. The colder period covered c. 1700–170 cal. yr BP, and an open downy birch ( Betula pubescens) woodland became widespread at 1000 m a.s.l., whilst pine remained sparse at this altitude. From c. 170 cal. yr BP onwards, warming allowed pine to re-establish its local presence alongside downy birch at 1000 m a.s.l.

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Are modern pollen assemblages from soils and mosses the same? A comparison of natural pollen traps from subtropical China

CATENA ◽

10.1016/j.catena.2021.105790 ◽

2022 ◽

Vol 209 ◽

pp. 105790

Author(s):

Yiman Fang ◽

M. Jane Bunting ◽

Chunmei Ma ◽

Xiaoping Yang

Keyword(s):

Subtropical China ◽

Modern Pollen ◽

Pollen Traps ◽

Modern Pollen Assemblages

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Modern pollen-vegetation-climate relationships and pollen productivity estimates for common East Siberian taxa

10.5194/egusphere-egu21-12546 ◽

2021 ◽

Author(s):

Rongwei Geng ◽

Andrei Andreev ◽

Stefan Kruse ◽

Yan Zhao ◽

Ulrike Herzschuh ◽

...

Keyword(s):

Field Survey ◽

Source Area ◽

Soil Samples ◽

Lake Surface ◽

East Siberia ◽

Climate Conditions ◽

Modern Pollen ◽

Pollen Productivity ◽

Paleoclimate Reconstructions ◽

R Value

<p>East Siberia is an ideal area for investigating the relationships between modern pollen assemblages and vegetation under the extremely cold and dry climate conditions. These relationships are the basis of paleovegetation and paleoclimate reconstructions from fossil pollen records. Pollen productivity estimates (PPE) are required for reliable pollen-based quantitative vegetation reconstructions. Here, we present a new pollen dataset of 48 moss/soil and 24 lake surface sediment samples collected from Chukotka and Yakutia. Generally, tundra and taiga vegetation sites can be well distinguished in the surface pollen assemblages from East Siberia. Moss/soil and lake samples have mostly similar pollen assemblages but contents of some pollen taxa may vary significantly in different sample types. We classified drone images based on field survey to obtain high-resolute vegetation data. Pollen counts in moss/soil samples and vegetation data can? be used in the Extended R-Value (ERV) model to estimate the relevant source area of pollen (RSAP) and the PPEs of major plant taxa. The result of PPE calculation for most common taxa (Alnus, Betula, Cyperaceae, Ericaceae, Larix, Pinus and Salix) can be used to improve vegetation reconstructions.</p>

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