The relationship between flowering phenology and pollen seasons of Alnus Miller

Agnieszka Dąbrowska; Bogusław Michał Kaszewski

doi:10.5586/aa.2012.058

The relationship between flowering phenology and pollen seasons of Alnus Miller

Acta Agrobotanica ◽

10.5586/aa.2012.058 ◽

2012 ◽

Vol 65 (2) ◽

pp. 57-66 ◽

Cited By ~ 3

Author(s):

Agnieszka Dąbrowska ◽

Bogusław Michał Kaszewski

Keyword(s):

Wind Speed ◽

Pollen Season ◽

Meteorological Factors ◽

Airborne Pollen ◽

Gravimetric Method ◽

Air Humidity ◽

Inflorescence Development ◽

Relative Air Humidity ◽

Pollen Seasons ◽

The Relationship

The dynamics of flowering and pollen release in anemophilous plants and the length of the particular phases depend largely on the geobotanical features of a region, its climate, meteorological factors, biological characteristics of vegetation, and abundance of pollen resources. The aim of the study was to determine the relationship between the flowering phases in eight Alnus taxa and the dynamics of occurrence and abundance of airborne pollen grains as well as the meteorological factors (maximum and minimum temperature, relative air humidity, maximum wind speed, and precipitation). The flowering phenophases and pollen seasons were studied in 2008–2011. Phenological observations of flowering were conducted in the Maria Curie-Skłodowska University Botanical Garden in Lublin and they involved the following taxa: Alnus crispa var. mollis, A. glutinosa, A. incana, A. incana ‘Aurea’, A. incana ‘Pendula’, A. maximowiczii, A. rubra and A. subcordata. Spearman’s r correlation coefficients were calculated in order to determine the relationship between the dynamics of inflorescence development and meteorological conditions. Aerobiological monitoring using the gravimetric method was employed in the determination of Alnus pollen content in the air. The annual phenological cycles in 2008-2011 varied distinctly in terms of the time of onset of successive flowering phases in the Alnus taxa studied, which depended largely on the taxonomic rank and meteorological factors. The following flowering sequence was revealed in the 2008-2011 growing seasons: A. subcordata (December or January), A. incana ‘Pendula’, A. incana, A. maximowiczii, A. rubra, A. glutinosa, A. incana ‘Aurea’ (February or March), and A. crispa var. mollis (April). The study demonstrated that the pollen of the taxa persisted in the air, on average, from mid-December to early May. The mean length of the flowering period, which coincided with various phases of the pollen season, was 17 days. The Alnus pollen season in 2008 started at the end of January and lasted until mid-March. In 2009, 2010, and 2011, the beginning of the pollen season was recorded in the first week of March and the end in the first week of April. The maximum concentration of airborne Alnus pollen was found at the full bloom stage of mainly A. glutinosa and A. rubra. Inflorescence development was most closely related to temperature and relative air humidity; there was a weaker relationship with wind speed and precipitation.

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An analysis of grass (Poaceae) pollen seasons in Lublin in 2001-2008

Acta Agrobotanica ◽

10.5586/aa.2009.030 ◽

2012 ◽

Vol 62 (2) ◽

pp. 91-96 ◽

Cited By ~ 2

Author(s):

Agnieszka Dąbrowska

Keyword(s):

Grass Pollen ◽

Pollen Season ◽

Gravimetric Method ◽

Pollen Allergy ◽

Pollen Grains ◽

Maximum Temperature ◽

Air Humidity ◽

Maximum Wind ◽

Relative Air Humidity ◽

Pollen Seasons

Grass pollen allergens are a frequent cause of pollen allergy in Poland and other European countries. The research on aeroplankton conducted in Lublin since 2001 allows characterization of the course of grass pollen seasons and estimation of the effect of maximum and minimum temperatures, relative air humidity, precipitation and maximum wind velocity on the taxon's pollen concentration. The gravimetric method was used in the study. During the eight-year research period, the pollen season usually started in the first or second decade of May and, as a rule, it lasted till the end of August, and quite exceptionally, in 2002 and 2008 till mid-August. The mean length of the pollen season was 107 days. The highest grass pollen risk was observed in the 26th and 27th week. The highest annual counts reaching over 3600 pollen grains × cm-2 were noted in 2008, while in the other study years they ranged from 741 to 1909. The date of the pollen season onset and its course were highly dependent on weather conditions, which was confirmed by the statistical analysis. The greatest significant influence on the pollen season was exerted by maximum temperature, relative air humidity and the maximum wind.

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General characteristics of airborne pollen in Montevideo city, Uruguay.

Boletín de la Sociedad Argentina de Botánica ◽

10.31055/1851.2372.v53.n2.20581 ◽

2018 ◽

Vol 53 (2) ◽

pp. 239-253

Author(s):

Leticia Tejera ◽

Ángeles Beri ◽

Ximena Martínez Blanco

Keyword(s):

Wind Speed ◽

Pollen Season ◽

Airborne Pollen ◽

Ricinus Communis ◽

Meteorological Conditions ◽

Air Humidity ◽

Relative Air Humidity ◽

Main Pollen Season ◽

Pollen Concentrations ◽

Pollen Sources

: This paper analyses daily and seasonal variations on pollen concentrations and the influence of meteorological conditions on the airborne pollen from June 2011 to May 2014. Data is also compared with results from a previous pollen survey from 2000-2001. Ninety-three taxa were identified, belonging to 49 trees and shrub taxa and 44 herbaceous taxa. The most important pollen sources were Poaceae, Platanus, Cupressaceae/Taxaceae, Eupatorieae type, Celtis, Urticaceae, Myrtaceae, Casuarina, Amaranthaceae, Cyperaceae, Fraxinus, Arecaceae, Ricinus communis, Moraceae, Myrsine, Ambrosia, Quercus, and Pinaceae. Pollen was recorded all year round but the main pollen season was from August to April. Inter-annual differences were observed on pollen indexes, dates and values of daily peak concentrations and monthly accumulated concentrations. Temperature, relative air humidity and wind speed and direction seem to be the most influential meteorological variables on pollen concentrations. The number of days that pollen concentrations are above moderate and high thresholds levels is estimated and woody and non-woody pollen concentrations would be above moderate levels on average 182 days per year.

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The influence of weather conditions on the course of pollen seasons of alder (Alnus spp.), hazel (Corylus spp.) and birch (Betula spp.) in Lublin (2001-2006)

Acta Agrobotanica ◽

10.5586/aa.2008.006 ◽

2012 ◽

Vol 61 (1) ◽

pp. 53-57 ◽

Cited By ~ 2

Author(s):

Agnieszka Dąbrowska

Keyword(s):

Pollen Season ◽

Birch Pollen ◽

Correlation Coefficients ◽

Pollen Grains ◽

Thermal Conditions ◽

Weather Conditions ◽

Air Humidity ◽

Relative Air Humidity ◽

Beginning Of Flowering ◽

Pollen Seasons

The start and rate of florescence of Alnus, Corylus and Betula are dependent on meteorological conditions. In the present paper we have analysed the effect of mean, maximum and minimum temperature, relative air humidity and precipitation on the onset of the pollen season as well as on its length and annual count of pollen grains in alder, hazel and birch. The measurement of pollen fall was done by the gravimetric methods with the use of Durham sampler. Correlation coefficients were calculated between the determined characteristics of the pollen season and weather conditions. In the six-year research period 2001-2006 it was observed that low temperatures in January produced a delayed start of the pollen season in alder, hazel and birch. The beginning of flowering in these taxa was also influenced by thermal conditions prevailing directly before the season (ca. 10 days). The pollen season of the trees in question tended to be prolonged alongside with the increase in relative air humidity, but it was shortened due to higher temperatures. The volume of alder and hazel pollen release increased together with the rise in relative air humidity and precipitation. The annual counts of birch pollen increased along with rising temperature and decreasing relative air humidity and precipitation in the season.

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Corylus and Alnus pollen concentration in air of Lviv (Western Ukraine)

Acta Agrobotanica ◽

10.5586/aa.1680 ◽

2016 ◽

Vol 69 (2) ◽

Cited By ~ 1

Author(s):

Nataliya Kalinovych ◽

Kateryna Voloshchuk ◽

Nataliya Vorobets

Keyword(s):

Pollen Season ◽

Gradual Increase ◽

Airborne Pollen ◽

Gravimetric Method ◽

Weather Conditions ◽

Pollen Concentration ◽

Western Ukraine ◽

Pollen Seasons ◽

A Site ◽

Start Dates

Corylus and Alnus trees are common throughout Western Ukraine. They are important producers of allergenic airborne pollen in the environment of Lviv city. The objective of this study was to examine the dynamics of the Corylus and Alnus air pollen concentration in Lviv with reference to changes in weather conditions. Pollen data (2011–2015) were obtained by the gravimetric method for a site located at the center of Lviv city. The total annual Corylus pollen sums varied from 281 to 724, while the Alnus sums were several times more abundant and varied from 656 to 2505. There were 43 days of difference in start dates of the Corylus pollen season. The start dates for the Alnus pollen season showed a 30-day difference over the 5 years. The season duration differed by 17 days for Corylus and 31 days for Alnus. There is some evidence of synchronous patterns for Corylus and Alnus pollen seasons in Lviv. A trend was observed towards earlier starts of seasons that corresponded to a gradual increase in the average February temperature over 2011–2015.

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Flowering phenology and pollen seasons of Corylus spp. in Lublin (Poland), 2008-2011

Acta Agrobotanica ◽

10.5586/aa.2012.002 ◽

2012 ◽

Vol 65 (3) ◽

pp. 13-24

Author(s):

Agnieszka Dąbrowska

Keyword(s):

Pollen Season ◽

Flowering Phenology ◽

Botanical Garden ◽

Maximum Temperature ◽

Air Humidity ◽

Full Bloom ◽

Relative Air Humidity ◽

Pollen Seasons ◽

The Individual ◽

Meteorological Elements

In the years 2008-2011, phenological observations of flowering of male inflorescences were carried out in seven taxa from the genus Corylus: C. americana, C. avellana, C. avellana ‘Contorta’, C. avellana ‘Pendula’, C. × colurnoides, C. cornuta, C. maxima, grown in the Maria Curie-Skłodowska University Botanical Garden in Lublin. Simultaneously, the hazel pollen seasons in the atmosphere of Lublin were analysed using a Durham sampler. The aim of the work was to assess the flowering in seven Corylus taxa in relation to selected meteorological elements and to describe the pollen seasons in the years 2008-2011. During the study years, the annual phenological cycles in the studied Corylus taxa differed markedly in terms of timing of the onset of the successive flowering phases. During the four years of observations, the earliest beginning of hazel flowering was found at the end of January, whereas the latest – at the end of March. The earliest full bloom took place in the first decade of February, and the latest – in the first decade of April. The end of flowering was reported in February or in the first or second decade of April. Each year, C. avellana was the first to produce flowers and it was subsequently followed by C. americana, C. × colurnoides, C. maxima, C. avellana ‘Pendula’, C. avellana ‘Contorta’, and C. cornuta. The pollen seasons in the study period began at the end of January, in the second decade of February, or in the first decade of March. The end of the pollen seasons most frequently took place in the first or second decade of April. The length of the pollen seasons ranged from 38 to 49 days, while the length of the flowering periods in the individual taxa was 22 days on average. During the four study years, the onset of flowering in C. avellana and the beginning of the pollen season coincided on the same day, whereas the onset of flowering in the other taxa was usually reported after the beginning of the pollen seasons. The flowering period of C. avellana ‘Contorta’ and C. cornuta lasted from 5 to 16 days after the pollen season. The development of inflorescences was most closely related to maximum temperature and relative air humidity.

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The Relationship between Symptom Flare of Atopic Dermatitis and Airborne Japanese Cedar and Cypress Pollen Counts: A Self-Scoring Diary Study

ISRN Dermatology ◽

10.5402/2012/218538 ◽

2012 ◽

Vol 2012 ◽

pp. 1-5 ◽

Cited By ~ 1

Author(s):

Haruko Nishie ◽

Mariko Kato ◽

Shiori Kato ◽

Hiroshi Odajima ◽

Rumiko Shibata ◽

...

Keyword(s):

Atopic Dermatitis ◽

Real Time ◽

Pollen Season ◽

Airborne Pollen ◽

Japanese Cedar ◽

Diary Study ◽

Pollen Counts ◽

High Level ◽

The Relationship

Background. With an increase in Japanese cedar and cypress (JC) pollinosis, the relationship between JC pollen and atopic dermatitis (AD) has been studied. Some reports suggest that JC pollen can be one exacerbating factor for AD, but there has been no report that discusses JC pollen counts relating to AD symptom flare although actual airborne JC pollen counts can widely fluctuate throughout the pollen season. Objective. The relationship between symptom flare of AD and airborne JC pollen counts was examined. Methods. We monitored JC pollen counts in real time and divided the counts into low and high level. We then analyzed self-scored “itch intensity” recorded by 14 AD patients through a self-scoring diary. Results. Among the 14 patients, 7 had significantly higher itch intensity while the pollen counts were high. Conclusion. Even during the pollen season, actual airborne pollen counts can widely fluctuate. Our study suggested that symptom flare of AD could be influenced by the actual pollen counts.

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Performance of different methods for reference evapotranspiration estimation in Jaíba, Brazil

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v22n2p83-89 ◽

2018 ◽

Vol 22 (2) ◽

pp. 83-89 ◽

Cited By ~ 1

Author(s):

Gustavo H. da Silva ◽

Santos H. B. Dias ◽

Lucas B. Ferreira ◽

Jannaylton É. O. Santos ◽

Fernando F. da Cunha

Keyword(s):

Wind Speed ◽

Solar Radiation ◽

Standard Method ◽

Reference Evapotranspiration ◽

Meteorological Data ◽

Air Humidity ◽

Method Performance ◽

Relative Air Humidity ◽

Evapotranspiration Estimation ◽

Missing Variables

ABSTRACT FAO Penman-Monteith (FO-PM) is considered the standard method for the estimation of reference evapotranspiration (ET0) but requires various meteorological data, which are often not available. The objective of this work was to evaluate the performance of the FAO-PM method with limited meteorological data and other methods as alternatives to estimate ET0 in Jaíba-MG. The study used daily meteorological data from 2007 to 2016 of the National Institute of Meteorology’s station. Daily ET0 values were randomized, and 70% of these were used to determine the calibration parameters of the ET0 for the equations of each method under study. The remaining data were used to test the calibration against the standard method. Performance evaluation was based on Willmott’s index of agreement, confidence coefficient and root-mean-square error. When one meteorological variable was missing, either solar radiation, relative air humidity or wind speed, or in the simultaneous absence of wind speed and relative air humidity, the FAO-PM method showed the best performances and, therefore, was recommended for Jaíba. The FAO-PM method with two missing variables, one of them being solar radiation, showed intermediate performance. Methods that used only air temperature data are not recommended for the region.

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Birch (Betula L.) pollen seasons in Cracow in 1991-2008 in relation to meteorological conditions

Acta Agrobotanica ◽

10.5586/aa.2009.028 ◽

2012 ◽

Vol 62 (2) ◽

pp. 67-75 ◽

Cited By ~ 5

Author(s):

Dorota Myszkowska ◽

Katarzyna Piotrowicz

Keyword(s):

Pollen Season ◽

Birch Pollen ◽

Meteorological Conditions ◽

Air Masses ◽

Circulation Types ◽

Atmospheric Fronts ◽

Pollen Seasons ◽

Daily Concentration ◽

Meteorological Elements ◽

The Relationship

The parameters of the birch pollen seasons in Cracow in 1991-2008 were analysed in relation to some meteorological elements and synoptic situations (circulation types, air masses and atmospheric fronts). Two types of the pollen seasons were distinguished - highly dense and less dense. The first type of the season started on the 15th of April (on average), lasted 11-20 days and the maximum daily concentration exceeded 500 pgm-3. The less dense type started generally earlier (the first decade of April), lasted more than 20 days and the peak days were unstable. In this type of the pollen season, two peak days were often observed. The relationship between the type of the season and the meteorological conditions before the season was pointed out. Additionally, the influence of circulation types, types of air masses and atmospheric fronts over south-eastern Poland on a given day on the number of days with a daily concentration > 80 pgm-3 was analysed. The relationship between the pollen season type and meteorological conditions before the season was found, among others, the influence of types of synoptic situations and air masses on the number of days with a concentration of over 80 pgm-3 was established.

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Environmental Assessment of the Impact of Meteorological Parameters on Man-Made Pollution by Carcinogenicly Dangerous Chemicals in the Voronezh Air Basin

Ecology and Industry of Russia ◽

10.18412/1816-0395-2021-2-60-65 ◽

2021 ◽

Vol 25 (2) ◽

pp. 60-65

Author(s):

S.A. Kurolap ◽

V.S. Petrosyan ◽

O.V. Klepikov ◽

V.V. Kulnev ◽

D.Yu. Martynov

Keyword(s):

Wind Speed ◽

Air Temperature ◽

Meteorological Parameters ◽

Carcinogenic Risk ◽

Meteorological Conditions ◽

Air Humidity ◽

Maximum Permissible Level ◽

Relative Air Humidity ◽

The Impact ◽

The City

Based on the analysis of official statistics from the Voronezh Hydrometeorological Service, the patterns of the dynamics of pollutants (formaldehyde and soot) are investigated depending on the combination of various meteorological parameters — air temperature, wind speed, relative air humidity. A positive relationship has been established between the increase in atmospheric pollution with formaldehyde and air temperature. With increasing wind speed and relative humidity, the concentration of formaldehyde and soot in the atmosphere of the city, as a rule, decrease. The maximum permissible level of carcinogenic risk to public health has been established, causing concern. The obtained patterns can be used to predict the level of technogenic pollution of the city’s atmosphere, depending on meteorological conditions.

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Bioclimatic characteristics of the regions of the Russian region from the standpoint of assessing the health risk of the population by effective temperature

Sanitarnyj vrač (Sanitary Inspector) ◽

10.33920/med-08-2104-04 ◽

2021 ◽

pp. 38-46

Author(s):

Rofail Salykhovich Rakhmanov ◽

Elena Sergeevna Bogomolova ◽

Denis Alekseevich Narutdinov

Keyword(s):

Heat Stress ◽

Wind Speed ◽

Air Humidity ◽

Climatic Zones ◽

Dry Air ◽

Wind Speeds ◽

Monthly Average ◽

Relative Air Humidity ◽

Russian Region ◽

Effective Temperatures

We calculated the effective temperatures based on 10-year data for temperatures (monthly average and minimum), wind speeds (monthly average and maximum) and relative air humidity in the climatic zones of the Krasnoyarsk Territory (subarctic No. 1) and temperate continental (Krasnoyarsk (object No. 2) and Minusinsk (3) We assessed the health risk.In winter, in the subarctic zone, the temperature is –23.3 ± 1.5 0 C (minimum –30.2 ± 2.1 0 C), in object No. 2 — –17.3 ± 1.6 0 C (–19.3 ± 1.0 0 С) and object No. 3 — –19.9 ± 1.4 0 С (–25.5 ± 1.9 0 С). In spring at object No. 1 it varied from –16.5 ± 1.7 0 С to + 1.6 ± 1, 0 0 С, object No. 2 — from –3.9 ± 0.9 0 С to + 9.4 ± 0.5 0 С, object No. 3 — from –4.5 ± 0.9 to + 10.6 ± 0.4. Temperatures ranged from + 8.2 ± 0.9 0 C to –17.8 ± 1.2 0 C (object No. 1), from + 9.4 ± 0.5 0 C to –7.5 ± 0.9 0 C and from +10.4 ± 0.4 0 C to –6.4 ± 1.0 0 C. In summer, the temperature was 19.9 ± 0.9 0 C, 18.8 ± 0.3 0 C, and 19.8 ± 0.4 0 C, respectively. Wind speed at object No. 3.6 ± 0.05 m/s in July increased to 5.4 ± 0.2 m/s in December (maximum 16.2 m/s); No. 2 in July 1.4 ± 0.05 m/s, in October-May 1.8 ± 0.2–2.1 ± 0.07 (maximum in December 10.1 ± 0.1 m/s); No. 3 minimum wind in January and February (1.1 ± 0.1 m/s), maximum 10.7 ± 0.6 m/s in May. A moderately dry climate is recorded during 2, 4 and 5 months. In the conditions of Krasnoyarsk and Minusinsk in the spring, humidity drops to the limits of dry air. Average effective temperatures indicated a possible risk of frostbite in the subarctic zone after 20–30 minutes within 2 months; at minimum temperatures and maximum winds in March, frostbite in 20–30 minutes, in November, December and February in 10–25 minutes; in January — in 5 minutes. In the Krasnoyarsk region in January frostbite is possible within 20–30 minutes, in Minusinsk in February in 20–30 minutes, in January 10–15 minutes. Heat stress is undefined.

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