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Wednesday, July 15, 2020 | History

4 edition of Variations in pollen frequency in a bog at Kangerjoki, N.E. Finland during the Flandrian found in the catalog.

Variations in pollen frequency in a bog at Kangerjoki, N.E. Finland during the Flandrian

Sheila Hicks

Variations in pollen frequency in a bog at Kangerjoki, N.E. Finland during the Flandrian

by Sheila Hicks

  • 353 Want to read
  • 29 Currently reading

Published by Societas Scientiarum Fennica in Helsinki .
Written in English

    Places:
  • Finland,
  • Kuusamo region.
    • Subjects:
    • Pollen -- Finland -- Kuusamo region.,
    • Peat bogs -- Finland -- Kuusamo region.,
    • Plant succession -- Finland -- Kuusamo region.

    • Edition Notes

      Bibliography: p. 27-28.

      Other titlesKangerjoki, N.E. Finland during the Flandrian., Flandrian.
      StatementSheila Hicks.
      SeriesCommentationes biologicae ;, 80
      Classifications
      LC ClassificationsQ60 .F553 vol. 80, QK658 .F553 vol. 80
      The Physical Object
      Pagination28 p. :
      Number of Pages28
      ID Numbers
      Open LibraryOL3906939M
      ISBN 109516530508
      LC Control Number81469692

      The composition of A. mellifera pollen loads at each site was significantly related, however, to the composition of heterospecific pollen transferred between stigmas at each site (Procrustes correlation = , P = ), indicating that almost 70% of variation in the composition of heterospecific pollen transferred between stigmas was. Pollen. Pollen developed within the anther provides a good system for investigating the regulation of several fundamental cellular events such as cell division, cell fate determination, gene regulation, cell–cell communication and cellular differentiation during pollination (Lord and Russell, ). From: Advances in Botanical Research,

      Autio J. & Hicks S., , Annual variation in pollen deposition and meteorological conditions on the fell Aakenustunturi in northen Finland: potential for using fossil pollen as a climate proxy, Grana Pollen information within Europe is of high quality and therefore it is feasible to produce maps of Europe with the expected average pollen load of the most important pollen types and to provide them for your holiday planning. Those maps bundle data from more than measurement sites of the EAN database spread over whole Europe and display.

      Pollen levels in the Greater Reykjavík Area and Akureyri are monitored from April 15th to September 30th every year in cooperation with the Icelandic Meteorological monitoring for Reykjavík started in , while monitoring in Akureyri began in F.A.Q About Pollen Forecasting And Sampling. IQVIA™, the company behind the Allergy Alert™ on , has spent over 25 years studying pollen counts and the methods for pollen sampling. We know how important pollen information is to allergy and hay fever sufferers, and how easily the information can be misunderstood.


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Variations in pollen frequency in a bog at Kangerjoki, N.E. Finland during the Flandrian by Sheila Hicks Download PDF EPUB FB2

Get this from a library. Variations in pollen frequency in a bog at Kangerjoki, N.E. Finland during the Flandrian. [Sheila Hicks]. Helsingfors Google Scholar Hicks S () Variations in pollen frequency in a bog at Kangerjoki, N.E.

Finland during the Flandrian. Commun Biol –28 Google Scholar Hicks S () Pollen analysis and archaeology in Kuusamo.

north-east Finland, an area of marginal human by: 2. Flandrian regional pollen assem-blage zones in eastern Finland. Variations in pollen frequency in a bog at Kangerjoki, N.E. Finland during the Flandrian (N.E.

Finland) during the Late Author: Christian Reynaud. Fossil Pinus and Betula pollen accumulation rates (PARs, grains cm−2 a−1) from a peat profile in Nellim, northern Finland, were compared to a year annually resolved record of monitored. compare pollen quantity and quality in non-CMS and CMS hermaphrodites and discuss the possible conse-quences on selection of restorer alleles.

Third, because frequency-dependent selection is supposed to play an important role in the maintenance of the system, we will compare pollen quantity and quality between twoCited by: Diurnal variation of tree pollen in the air in Finland hiARKKU KAPYLA Kfipyla, hf.

Diurnal variation of tree the air in Finland. - GranaUppsala 8 November ISSN The pollen was collected with Burkard spore traps inTurku and Jyvaskyla, in southern and central Finland. The pollen was collected with Burkard spore traps in Turku and Jyväskylä, in southern and central Finland.

Selected days of high concentration were analysed for hour to hour concentrations. The diurnal variation of pollen concentration was variable in Alnus, Betula, Juniperus and Pinus, while Picea, Populus, Quercus, Salix and Ulmus had.

Review of Palaeobotany and Palynology, 37 (): Elsevier Scientific Publishing Company, Amsterdam -- Printed in The Netherlands POLLEN CONCENTRATION AS A BASIS FOR INDIRECT DATING AND QUANTIFYING NET ORGANIC AND FUNGAL PRODUCTION IN A PEAT BOG ECOSYSTEM A.A.

MIDDELDORP Hugo de Vries-Laboratory, University of Amsterdam. Olga V. Lisitsyna, Sheila Hicks, Antti Huusko, Do moss samples, pollen traps and modern lake sediments all collect pollen in the same way. A comparison from the forest limit area of northernmost Europe, Vegetation History and Archaeobotany, /sx, 21, 3, (), ().

Pollen data are presented for the pine forest region around Lake Inari in eastern Finnish Lapland. The region has traditionally been the home of the Saami people who, until the 19th century, followed a seasonally nomadic way of life with an economy based on hunting, fishing and gathering.

Although the Saami had no permanent centres of settlement, they did gather together at specific sites. We examined differences in pollen dispersal efficiency between 2 years in terms of both spatial dispersal range and genetic relatedness of pollen in a tropical emergent tree, Dipterocarpus species was pollinated by the giant honeybee (Apis dorsata) in a year of intensive community‐level mass‐flowering or general flowering (), but by several species of moths in a year.

Trees produce pollen during specific times of the year. Pollen can induce pollinosis, a type of allergic rhinitis, in humans. In Japan, allergenic pollen is mainly dispersed from February to May.

News | updated Unusually heavy pollen season getting underway in Finland While the birch and grass pollen season hasn't started, high levels of alder tree pollen will likely cause worsening symptoms for allergy sufferers this week.

Pollen, a mass of microspores in a seed plant, usually appearing as a fine dust and varying greatly in shape and structure. Each pollen grain is formed in the male structures of seed-bearing plants and is transported by various means to the female structures to facilitate fertilization of the ovules.

Book Reviews An Illustrated Guide to Pollen Analysis. By P. Moore and J. Webb. ix+ pp, 48 plates, 33 figures, 6 tables, index. London: Hodder and Stoughton. & paperback; f boards. This beautifully illustrated book fills a conspicuous gap in our literature on pollen analysis, a practical manual giving details of.

frequency that were more than 45%. Pollen grain Composition of Different Branded and Unbranded frequency of Ananas comosus was % in Nenas honey, Honey Samples. International Journal of % of Melaleuca cajuputi in Gelam honey and % Microbiological Research, 4(2): Among-species differences in pollen quality and quantity limitation: implications for endemics in biodiverse hotspots Conchita Alonso1,*, Carmen M.

Navarro-Ferna´ndez1, Gerardo Arceo-Go´mez2, George A. Meindl2, Vı´ctor Parra-Tabla3 and Tia-Lynn Ashman2 1Estacio´n Biolo´gica de Don˜ana, Consejo Superior de Investigaciones Cientı´ficas (CSIC), Avda.

On the other hand, even small-scale variations in sampling height (i.e. of just 5 m) were found to significantly differentiate measurements of aeroallergens, like pollen and fungal spo24, Pollen and spore analysis of surface sediment samples from 45 points within Oil Well Bog, a coniferous swamp near Cambridge, Ontario, was used to determine the possibility of identifying different wetland vegetation communities from their palynological record, and to assess the effects of variable wetland vegetation on the pollen representation of surrounding upland communities.

Sediments containing fossil pollen have been taken from peat bogs, lake beds, alluvial deposits, ocean bottoms and ice cores (Jacobson & Bradshaw, ). Where pollen has been deposited in water, one must be aware of the non-climatic effects that cause variations in pollen type and abundances. my experiments during the summers of, and near the Rocky Mountain Biological Lab, Gothic, Colo- rado.

Pollen Size Variation I collected anthers from two-flowered plants to determine within- and among-plant variation in pollen production and grain volume.

I collected undehisced anthers from 10 plants within 30 m of each other in each.conditions. High air pollen counts are seen on sunny and windy days especially before noon.

The allergen count of birch tree and grass pollen multiplies in air right before rain and especially during a thunder storm. The peak flowering period lasts two to three weeks, and during this time there may be pollen in the air also during nights.

2 3.pollen size variation, could infl uence siring success during pollen competition. Specifi cally, we focused on genetically based pollen size variation and tested the hypothesis that larger pollen grains were more competitive during pollen competition than smaller pol-len grains.

We used Ipomoea purpurea individuals previously bred.