Deriving Response Matrices from Central American Modern Pollen Rain

Modern pollen samples collected from 80 locations and representing a wide array of mature habitats in Panama and Costa Rica provide analogs to assist in the interpretation of fossil pollen records. Pollen spectra accurately reflect changes in actual forest types. Upslope transport of pollen of anemophilous species is evident in the sparsely vegetated montane samples. However, the corresponding downslope transport of these prolific pollen producers is masked by local pollen production. Mean pollen representation across gradients of mean annual temperature (MAT; 4°C increments) and mean annual precipitation (MAP; 500 mm increments) for 17 pollen types are presented as response matrices. Although preliminary in nature, these response matrices present a clearer image of pollen representation than can be obtained by considering gradients of MAT or MAP alone.

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Characterisation of Bolivian savanna ecosystems by their modern pollen rain and implications for fossil pollen records

Review of Palaeobotany and Palynology ◽

10.1016/j.revpalbo.2011.01.001 ◽

2011 ◽

Vol 164 (3-4) ◽

pp. 223-237 ◽

Cited By ~ 27

Author(s):

Huw T. Jones ◽

Francis E. Mayle ◽

R. Toby Pennington ◽

Timothy J. Killeen

Keyword(s):

Fossil Pollen ◽

Modern Pollen ◽

Pollen Rain ◽

Pollen Records

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Modern pollen–climate relationships and their application for pollen-based quantitative climate reconstruction of the mid-Holocene on the southern Korean Peninsula

The Holocene ◽

10.1177/09596836211060493 ◽

2021 ◽

pp. 095968362110604

Author(s):

Jaeyoung Lee ◽

Chang-Pyo Jun ◽

Sangheon Yi ◽

Yongmi Kim ◽

Eunmi Lee ◽

...

Keyword(s):

Korean Peninsula ◽

Southern Oscillation ◽

Variation Partitioning ◽

Weighted Averaging ◽

Fossil Pollen ◽

Mean Annual Temperature ◽

Modern Pollen ◽

Arboreal Pollen ◽

Wide Range ◽

Pollen Records

A modern pollen dataset is a prerequisite for reconstructing quantitative paleoclimate and paleovegetation cover using fossil pollen records. Although multiple modern pollen–climate datasets have been established covering a wide range of climate conditions, such datasets are exceedingly rare for the Korean Peninsula (KP). In this study, we acquired a modern pollen dataset from 198 surface soil samples collected on 37 mountains on the southern KP. Redundancy analysis (RDA) and variation partitioning results identified mean annual temperature (Tann) as the most important climate variable shaping pollen assemblages on the southern KP. Using the pollen–climate relationships inferred from the RDA, we applied the Huisman–Olff–Fresco model and determined that arboreal pollen taxa responded sensitively to the climatic gradient, whereas non-arboreal pollen taxa did not. We applied weighted averaging–partial least squares (WA-PLS) and the modern analog technique (MAT) to the pollen dataset, and a comparison of the results showed that MAT performed better than WA-PLS. A transfer function was applied to fossil pollen records from the areas covered by our dataset; the results confirmed that annual precipitation (Pann) and Tann were modulated by different mechanisms, with Pann strongly affected by El Niño–Southern Oscillation-driven typhoons during the Holocene, whereas Tann was mainly influenced by the Tsushima Warm Current from 7500 to 5100 cal yr BP depending on Kuroshio Current inflow intensity, and subsequently followed by the East Asian winter monsoon during 5100–3400 cal yr BP.

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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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The modern pollen–vegetation relationship in Jammu, India: a comparative appraisal

10.35535/acpa-2021-0001 ◽

2021 ◽

Vol 61 (1) ◽

pp. 1-19

Author(s):

Md. Firoze Quamar ◽

Pooja Tiwari ◽

Biswajeet Thakur

Keyword(s):

Deciduous Forest ◽

Principal Component ◽

Pollination Syndrome ◽

Fossil Pollen ◽

Pollen Assemblage ◽

Long Distance ◽

Modern Pollen ◽

Long Distance Transport ◽

High Production ◽

Pollen Records

An understanding of the relationship between modern pollen and vegetation is a prerequisite for reconstruction of vegetation and climate change from fossil pollen records. We conducted palynological studies of thirty-five surface soil samples from the Jammu region of India, which revealed that Pinus, among the conifers (regional needle-leaved taxa), is over-represented in the pollen assemblage due to its high production and effective dispersal of pollen. Other coniferous and broadleaved (regional and/or extra-regional) taxa have comparatively lower values in the pollen assemblages, similar to the representation of subtropical deciduous forest elements (regional), as well as shrubby (regional and/or extra-regional) taxa. This inconsistency in the pollen assemblage could be due to long-distance transport of the former by wind and/or water from the higher reaches of the Himalayas, and also because the latter have an entomogamous pollination syndrome and are not high pollen producers. The recovered pollen assemblage presents a distorted picture of the extant vegetation; hence, caution should be exercised in interpreting fossil pollen records from the study area. Principal component analysis (PCA) shows variability in the distribution of pollen from different sites in the Jammu region, perhaps the result of transport (by wind and/ or water), altitude and/or edaphic factors of the Himalayan terrain. The study should improve our understanding of the modern pollen-vegetation relationship and aid further calibration and interpretation of fossil pollen records.

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Isopoll Maps and an Analysis of the Distribution of the Modern Pollen Rain, Eastern and Central Northern Canada

Géographie physique et Quaternaire ◽

10.7202/032471ar ◽

2007 ◽

Vol 36 (1-2) ◽

pp. 91-108 ◽

Cited By ~ 14

Author(s):

D. L. Elliot-Fisk ◽

J. T. Andrews ◽

S. K. Short ◽

W. N. Mode

Keyword(s):

Principal Component ◽

Eastern Canada ◽

Northern Canada ◽

Modern Pollen ◽

Pollen Content ◽

Pollen Types ◽

Pollen Rain ◽

Multiple Samples ◽

Percentage Data ◽

Component Scores

ABSTRACT At 39 sites in eastern and central northern Canada, multiple samples of surface moss and lichens have been analyzed for their pollen content. Although pollen from 20 to 30 taxa were identified in the samples from each site, 8 pollen types (Alnus, Betula, Picea. Pinus, Salix, Gramineae, Cyperaceae and Ericaceae) usually comprise 90 to 100% of the pollen rain. We present isopoll maps of these taxa based on mean percentages of multiple samples from the 39 sites. The data are further analyzed by a number of statistical methods to determine whether there are specific pollen assemblages within this region and to what extent present day climatic parameters and floristic/vegetation zones correlate with pollen counts. Cluster analysis on raw data and on principal component scores yields six distinct pollen assemblages which are further examined by discriminant analysis. Pollen concentration maps for eastern Canada are also presented here and used as an aid in interpreting the percentage data.

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Pollen evidence of Saami settlement and reindeer herding in the boreal forest of northernmost Sweden—an example of modern pollen rain studies as an aid in the interpretation of marginal human interference from fossil pollen data

Review of Palaeobotany and Palynology ◽

10.1016/0034-6667(94)90018-3 ◽

1994 ◽

Vol 82 (1-2) ◽

pp. 37-45 ◽

Cited By ~ 12

Author(s):

Kjell-Åke Aronsson

Keyword(s):

Boreal Forest ◽

Fossil Pollen ◽

Reindeer Herding ◽

Pollen Data ◽

Human Interference ◽

Modern Pollen ◽

Pollen Rain

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Modern pollen–vegetation relationships in the Champsaur valley (French Alps) and their potential in the interpretation of fossil pollen records of past cultural landscapes

Review of Palaeobotany and Palynology ◽

10.1016/j.revpalbo.2005.02.003 ◽

2005 ◽

Vol 135 (1-2) ◽

pp. 13-39 ◽

Cited By ~ 51

Author(s):

Mona Court-Picon ◽

Alexandre Buttler ◽

Jacques-Louis de Beaulieu

Keyword(s):

Cultural Landscapes ◽

Fossil Pollen ◽

French Alps ◽

Modern Pollen ◽

Pollen Records

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The representation of Proteaceae in modern pollen rain in species-rich vegetation communities in south-western Australia

Australian Journal of Botany ◽

10.1071/bt02048 ◽

2003 ◽

Vol 51 (2) ◽

pp. 135 ◽

Cited By ~ 5

Author(s):

Freea Itzstein-Davey

Keyword(s):

Species Richness ◽

Western Australia ◽

Fossil Pollen ◽

Quaternary Sediment ◽

Plant Family ◽

Dominant Type ◽

Vegetation Communities ◽

Modern Pollen ◽

Fossil Material ◽

Pollen Rain

The Proteaceae family is a large Gondwanan plant family with a major centre of richness in south-western Australia. Modern pollen–vegetation relationships in the two areas of species richness in the northern and southern sandplains of south-western Australia were investigated to calibrate fossil-pollen studies concurrently conducted on Eocene, Pliocene and Quaternary sediment. Results indicated that the Proteaceae component in modern pollen rain can be quite high, contributing up to 50% of the count. Some sites showed a dominant type (such as Banksia–Dryandra), whilst others had up to six different genera represented. Exactly how and when the biodiversity of Proteaceae in south-western Australia developed is unknown. This work provides a benchmark for comparisons with studied fossil material to unravel patterns of diversity of this family in south-western Australia.

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Modern pollen rain as a background for palaeoenvironmental studies in the Serra dos Carajás, southeastern Amazonia

The Holocene ◽

10.1177/0959683616683260 ◽

2017 ◽

Vol 27 (8) ◽

pp. 1055-1066 ◽

Cited By ~ 6

Author(s):

José Tasso Felix Guimarães ◽

Tarcísio Magevski Rodrigues ◽

Luiza Santos Reis ◽

Mariana Maha Jana Costa de Figueiredo ◽

Delmo Fonseca da Silva ◽

...

Keyword(s):

Lake Sediments ◽

Drainage Basin ◽

Pollen Grains ◽

Modern Pollen ◽

Pollen Rain ◽

Flowering Periods ◽

Pollination Strategy ◽

Pollen Records

Several alternative interpretations of the pollen records of lake sediments in the Amazonia may arise due to a lack of understanding of the modern environments, mainly related to pollen–vegetation relationship. Therefore, in this work, we studied the modern pollen rain in sediments of the Amendoim Lake, plateaus of the Serra Sul dos Carajás, southeastern Amazonia. This study indicates the predominance of pollen grains from forest formation (ombrophilous forests and capão florestal) over montane savanna in the lake sediments, despite the fact that montane savanna occupies ~90% of the drainage basin. Additionally, these sediments reflect stronger signal of pollen from ombrophilous forests that occur in the slopes of the plateau. Important components of montane savanna such as Vellozia and Cereus were not observed in the modern pollen rain, which may be related to their shorter flowering periods restricted to the beginning of wetter conditions. The absence of Sacoglottis, Trichilia, Clusia, Emmotum, Guapira and Simarouba in the pollen rain is likely associated with different pollination strategy. The occurrence of windblown pollen of Alchornea, Pseudolmedia, Ilex and Cecropia, which are found from low to highlands of the Carajás region, reinforces a regional vegetation signal in sediments. Several plants from the studied site have been improperly described, according to taxonomy and ecology. For example, the current occurrence of Ilex and Styrax in the study site clearly suggests that they cannot be used as indicators of colder palaeoclimate conditions, as previously described. In addition, Poaceae can be found in drier to wetter substrate conditions, and abundance of their pollen grains in lakes can significantly vary according to relief morphology and cannot indicate palaeovegetation openness. Therefore, this work is a good background for further palaeobotany studies for this region.

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