A Silica Depressant Method for Concentrating Fossil Pollen and Spores

1960 ◽  
Vol 6 (3) ◽  
pp. 327 ◽  
Author(s):  
Bernard C. Arms
Keyword(s):  
Fossil Pollen ◽  
Pollen And Spores

A Late Holocene Paleoecological Record from Torrey Pines State Reserve, California

2000 ◽  
Vol 53 (3) ◽  
pp. 341-351 ◽  
Author(s):  
Kenneth L. Cole ◽  
Eugene Wahl
Keyword(s):  
Late Holocene ◽  
Climate Changes ◽  
Regional Climate ◽  
Sediment Chemistry ◽  
Fossil Pollen ◽  
Plant Type ◽  
The North ◽  
Low Genetic Diversity ◽  
Core Site ◽  
Pollen And Spores

AbstractPaleoenvironments of the Torrey Pines State Reserve were reconstructed from a 3600-yr core from Los Peñasquitos Lagoon using fossil pollen, spores, charcoal, chemical stratigraphy, particle size, and magnetic susceptibility. Late Holocene sediments were radiocarbon dated, while the historical sediments were dated using sediment chemistry, fossil pollen, and historical records. At 3600 yr B.P., the estuary was a brackish-water lagoon. By 2800 yr B.P., Poaceae (grass) pollen increased to high levels, suggesting that the rising level of the core site led to its colonization by Spartina foliosa (cord-grass), the lowest-elevation plant type within regional estuaries. An increase in pollen and spores of moisture-dependent species suggests a climate with more available moisture after 2600 yr B.P. This change is similar to that found 280 km to the north at 3250 yr B.P., implying that regional climate changes were time-transgressive from north to south. Increased postsettlement sediment input resulted from nineteenth-century land disturbances caused by grazing and fire. Sedimentation rates increased further in the twentieth century due to closure of the estuarine mouth. The endemic Pinus torreyana (Torrey pine) was present at the site throughout this 3600-yr interval but was less numerous prior to 2100 yr B.P. This history may have contributed to the low genetic diversity of this species.

scholarly journals Fossil pollen and spores as a tool for reconstructing ancient solar-ultraviolet irradiance received by plants: an assessment of prospects and challenges using proxy-system modelling

2019 ◽  
Vol 18 (2) ◽  
pp. 275-294 ◽  
Author(s):  
Alistair W. R. Seddon ◽  
Daniela Festi ◽  
T. Matthew Robson ◽  
Boris Zimmermann
Keyword(s):  
Systematic Evaluation ◽  
Fossil Pollen ◽  
System Modelling ◽  
Pollen And Spores ◽  
Ultraviolet Irradiance ◽  
Solar Ultraviolet

A systematic evaluation of the uncertainties limiting the application of UV-B-absorbing compounds in pollen and spores to reconstruct UV-B irradiance.

scholarly journals Fossil Pollen and Spores in Japanese Coal

1965 ◽  
Vol 44 (12) ◽  
pp. 792-796
Author(s):  
Shigemoto Tokunaga
Keyword(s):  
Fossil Pollen ◽  
Pollen And Spores

LIPID COMPONENTS IN FRESH AND FOSSIL POLLEN AND SPORES

Sporopollenin ◽  
1971 ◽  
pp. 512-544 ◽  
Author(s):  
G. DUNGWORTH ◽  
A. McCORMICK ◽  
T.G. POWELL ◽  
A.G. DOUGLAS
Keyword(s):  
Fossil Pollen ◽  
Pollen And Spores ◽  
Lipid Components

scholarly journals Palaeocarpological and palaeoclimatic studies of the murtic interglacial flora of the Belarusian upland

2020 ◽  
pp. 70-77
Author(s):  
Heorhi I. Litviniuk
Keyword(s):  
Climate Changes ◽  
Time Span ◽  
Warm Period ◽  
Fossil Pollen ◽  
Quaternary Deposits ◽  
Palynological Analysis ◽  
Reference Sections ◽  
Pollen And Spores ◽  
Fossil Floras ◽  
Good Agreement

The Muravian interglacial horizon is the last warm period of time span closest to our time, as well as one of the marking horizons in the complex composed layer of Quaternary deposits in Belarus. The study of the Muravian deposits, as well as an elucidation of the paleogeographic conditions that existed at that time, can make it possible to predict climate changes on our planet in the future. Based on the analysis of palaeocarpological materials obtained by the author in the study of reference sections located within the territory of the Belarusian upland and reflecting the optimal phases of the Muravian interglacial, a brief analysis of the composition of fossil floras is carried out, the conditions for their formation are established, and paleoclimatic reconstructions were performed on the basis of the obtained materials. The data obtained indicate that the average July temperatures at the optimum of the Muravian interglacial on the territory of the Belarusian upland were +17.0 till +24.0 °С for the eastern regions and +17.0 till +21.2 °С for the Grodno upland. The average January temperature ranged from +2.0...+7.0 to –3.0...–7.2 ºC. The results obtained are in good agreement with the data of other methods, in particular, palynological analysis based on the study of fossil pollen and spores. In accordance with the modern climatic indicators of the territory of Belarus, the climate at the optimum of the Muravian interglacial was at least several degrees warmer than the current one, and the winters were much milder.

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