Phenology of Petersianthus Macrocarpus from 2017 to 2020 and Risk of Pollinosis in Dictrict of Abidjan

Petersianthus macrocarpus is a plant species whose pollens are potentially allergenic. This plant is present from the coast to the centre of the country. The objective of this study is to prevent populations from being exposed to the pollens of Petersianthus macrocarpus. Specifically, it was a question of defining the flowering of Petersianthus macrocarpus, evaluating the impact of the climate on this flowering and listing the populations most exposed to P. macrocarpus pollens. The study took place in Abidjan, in the commune of Yopougon, specifically in South Niangon, from September 2017 to June 2020. Sampling by quadrat allowed to determine the number of individuals, the cover, the density and the frequency of the vegetation. Floral phenology was carried out by weekly observations using binoculars. The coverage in each quadrat was 1 and the frequency 100%. Individuals less than 6 m high did not bear any flowers. Two flowering periods were observed in the years 2017 to 2019. The first was from April to June, the second from November to January. However, there was no flowering from April to June in 2020. The evolution of rainfall in 2020 was not identical to that of the three previous years. The phenology of Petersianthus macrocarpus presents periods of high risk of pollinosis and is influenced by rainfall. Increasing wind speed exposes new populations to pollen. The installation of pollen collectors is certainly necessary to establish the pollen calendar of Petersianthus macrocarpus in Côte d’Ivoire.

ПЯТИЛЕТНИЙ МОНИТОРИНГ ВОЗДУШНОЙ СРЕДЫ Г. САМАРЫ

Цель. Определить региональные особенности пыльцевого спектра воздушной среды г. Самары по итогам пятилетнего мониторинга, составление календаря пыления аллергенных растений для г. Самары. Материалы и методы. Пыльцу улавливали волюметрическим методом с использованием ловушки-импактора оригинальной конструкции на предметные стекла, покрытые смесью вазелина и воска. В полученных препаратах подсчитывали пыльцевые зерна и определяли их принадлежность к различным систематическим группам. Результаты. В 2013 г. в воздушном бассейне г. Самары зарегистрирован 21 таксон (12 древесных и 9 травянистых), в 2014 г. отмечено 20 таксонов (13 древесных и 7 травянистых), в 2015 г. - 20 таксонов (12 древесных и 8 травянистых), в 2016 г. - 21 таксон (13 древесных и 8 травянистых), в 2017 г. - 18 таксонов (10 древесных и 8 травянистых). Суммарно за исследуемый период (5 лет) доминировала пыльца амброзии (24,3), тополя (12), березы (11,5), сосновых (7,5), вяза (6,3), клена (6,3), крапивы (5,8), злаков (4,7), полыни (3,7). Определено 10 доминирующих таксонов, которые формировали от 90 до 95 ежегодного объема пыления. Преобладающие таксоны значительно варьировали год от года по удельному весу. только три вида пыльцы присутствовало в спектре ежегодно в количестве более 4 от годовой суммы: пыльцевые зерна тополя, березы и амброзии. Заключение. Выявлены региональные особенности аэропалинологической ситуации, характерной для региона, составлен календарь пыления аллергенных растений для г. Самары.Aim. To determine the regional characteristics of the pollen spectrum of the air environment by the end of the five-year monitoring to create the pollen calendar of allergenic plants in Samara, Russia. Materials and methods. Pollen was sampled using the volumetric method with a self-engineered pollen impactor into glass slides, covered with a mixture of petrolatum and wax. The pollen grains were counted and classified according to the systematic groups. Results. IIn 2013 the Samara urban air basin contained pollen of 21 taxa (12 woody taxa and 9 herbaceous taxa) in 2014 - 20 taxa (13 woody and 7 herbaceous) in 2015 - 20 taxa (12 woody and 8 herbaceous) in 2016 - 21 taxa (13 woody and 8 herbaceous) in 2017 - 18 taxa (10 woody and 8 herbaceous). During the five-year survey the dominant taxa were ragweed (24.3), poplar (12,0), birch (11.5), pine (7.5), maple (6.3), elm (6.3), nettle (5.8), willow (4.8), Gramineae (4.7), and wormwood (3.7). 10 dominant taxa were determined, which formed from 90 to 95 of the annual pollen volume. The prevailing taxa varied considerably from year to year by specific weight. Only three pollen species were present in the spectrum annually in the amount of more than 4 of the annual amount: poplar, birch and ambrosia pollen grains. Conclusion. Regional features of aeropalynological situation was revealed and pollen calendar of allergenic plants in Samara was created.

The five year monitoring of the air environment in Samara

Aim. To determine the regional characteristics of the pollen spectrum of the air environment by the end of the five-year monitoring; to create the pollen calendar of allergenic plants in Samara, Russia. Materials and methods. Pollen was sampled using the volumetric method with a self-engineered pollen impactor into glass slides, covered with a mixture of petrolatum and wax. The pollen grains were counted and classified according to the systematic groups. Results. IIn 2013 the Samara urban air basin contained pollen of 21 taxa (12 woody taxa and 9 herbaceous taxa); in 2014 - 20 taxa (13 woody and 7 herbaceous); in 2015 - 20 taxa (12 woody and 8 herbaceous); in 2016 - 21 taxa (13 woody and 8 herbaceous); in 2017 - 18 taxa (10 woody and 8 herbaceous). During the five-year survey the dominant taxa were ragweed (24.3%), poplar (12,0%), birch (11.5%), pine (7.5%), maple (6.3%), elm (6.3%), nettle (5.8%), willow (4.8%), Gramineae (4.7%), and wormwood (3.7%). 10 dominant taxa were determined, which formed from 90% to 95% of the annual pollen volume. The prevailing taxa varied considerably from year to year by specific weight. Only three pollen species were present in the spectrum annually in the amount of more than 4% of the annual amount: poplar, birch and ambrosia pollen grains. Conclusion. Regional features of aeropalynological situation was revealed and pollen calendar of allergenic plants in Samara was created.