Aerobiological studies in subalpine birch forest at Dovrefjell, Central Norway, 1982–1984

Johansen, Stein Tore

doi:10.1080/00173139209430733

Cited by 6 publications

(3 citation statements)

References 18 publications

(3 reference statements)

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“…886-2-23918940 nuous aeropalynological survey, can provide many useful information for those aeroallergic studies (Johansen 1992, Jnceoglu et al 1994). The present study reports an investigation for the two-year pollen calendar on airborne pollen and spores in Taipei, the northern city of Taiwan, during 1993Taiwan, during -1994.…”

Section: Introductionmentioning

confidence: 97%

An investigation of airborne pollen in Taipei city, Taiwan, 1993–1994

Yang

Chen

1998

J. Plant Res.

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A two-year aeropalynological study performed during January 14, 1993 to December 31, 1994 in Taipei City revealed 154 different pollen taxa, with the most frequent being Broussonet/a (31.3%), Trema (15%), Bischofia (6.9%), Mallotus (6.8%), Cyathea (3.8%), Morus (3.7%), Fraxinus (2.9%) and Gramineae (2.8%), respectively. Two quantitative peaks of pollen grains appeared in March and in September in 1993, but only one peak in 1994. The dominant pollen taxa during these two peaks were Broussonet/a and Mallotus. The heavy rain in February 1994 seemed to have delayed the first pollen peak to April, but Broussonetia was still the most frequent taxon. After July 1994, six typhoons brought heavy precipitation to northern Taiwan. Different weather types might have an effect on the concentration of airborne pollen grains, so that the timing of quantitative peaks was different in the two studied year~ Arboreal pollen (AP), non-arboreal pollen (NAP) and fern spores (FS) constituted 81.7%, 7.7% and 7.8% of the two-year sum, respectively. AP dominated from January to June, NAP in November and fern spores in July. Native species in the Taipei Basin and trees along urban roadsides were the common sources of airborne pollen. The pollen calendar of two years in Taipei City was submitted.

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Section: Introductionmentioning

confidence: 97%

An investigation of airborne pollen in Taipei city, Taiwan, 1993–1994

Yang

Chen

1998

J. Plant Res.

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“…Similar observations were reported by Guðjohnsen (personal communication) who conducts airborne pollen monitoring in Akureyri and Gardabaer, Iceland. However, further north, the same taxon may flower later, from the second or third week of June to the beginning of August (Johansen 1992;Lindgren et al 1995). Since we trapped pollen in July and August, this would implicate the origin of pollen from areas of a cooler climate, such as northern Norway.…”

Section: Discussionmentioning

confidence: 96%

Polish Polar Research

Jędryczka,

Żuraw,

Zagórski

et al. 2022

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Spitsbergen is the largest island in the Svalbard Archipelago (Norway) that has been permanently populated. The harsh Arctic climate prevents development of large vascular plants such as trees. A two-year aerobiological survey was conducted within the framework of two consecutive polar expeditions (2014 and 2015) in Spitsbergen (Calypsobyen, Bellsund). The air quality was measured continuously from June/July to August using a 7-day volumetric air sampler, Tauber trap and moss specimens. Collected air samples and gravimetric pollen deposits were processed following transfer to sterile laboratory conditions and analyzed with the aid of light microscopy. Days when pine pollen grains were detected in the air were selected for further analysis. Clusters of back-trajectories, computed using the Hybrid Single Particle Lagrangian Integrated Trajectory model in combination with ArcGIS software as well as the Flextra trajectory model, showed the movement of air masses to the sampling location at Hornsund, and thus indicated the likely origin of pollen grains. The GlobCover 2009 and CORINE Land Cover 2012 datasets were employed to establish the distribution of coniferous forests in the areas of interest. Conclusions were drawn based on the analyses of the

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“…Cladosporiiriii, U. virens, Arthrobotrys, Triclioconis, Nigrospora and Dreclislera spores. As in the case of harvesting, similar mechanical disturbances of source materials during the threshing, grinding and handling of hay can release enormous numbers of spores into the air (Johansen 1992, Buttner & Stetzenbach 1993, Uddin & Chakraverty 1994) which may cause rhinitis, immediate or long term allergy or other ailments in farmers since some of the fungal isolates are known allergens.…”

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confidence: 99%