scholarly journals Caractérisation Du Contenu Pollinique De L’atmosphère De La Commune d’Abomey-Calavi De 2015 À 2017

2017 ◽  
Vol 13 (30) ◽  
pp. 417
Author(s):  
Tchabi F. Lopez ◽  
Tossou G. Monique ◽  
Zanou R. Adéline ◽  
Akoegninou Akpov ◽  
Akpagana Koffi
Keyword(s):  
Wind Speed ◽  
Pollen Analysis ◽  
Meteorological Parameters ◽  
Elaeis Guineensis ◽  
Pollen Grains ◽  
Acacia Auriculiformis ◽  
Maximum Temperature ◽  
Floristic Inventory ◽  
Pollen Content

The Characterization of pollen content of Abomey-Calavi was studied from April 2015 to April 2017, whether two years. A floristic inventory of the species in 7 of the 12 districts of the municipality as well as a collection of pollen grains using the sensor of Hirst were carried out. In total, 104 species in bloom were inventoried each year. Pollen analysis yielded an average of 180 and 182 grains of pollen per cubic meter of air per day from April 2015 to April 2016 and April 2016 to April 2017. They belong to 29 families, 41 genera and 38 species. Among the species inventoried, 47.11% was found in the samples analyzed. The dominant taxa for the two years of study are: Acacia auriculiformis, Poaceae, Combretum indicum and Elaeis guineensis. The daily pollen index of these taxa shows that they are in bloom throughout the year and their main pollination period differs according to the seasons of the year. The correlation is positive between pollen grains and meteorological parameters such as maximum temperature and wind speed but negative between pollen grains, minimum temperature and rainfal.

scholarly journals Birch pollen grains in the air of Szczecin in 2000-2004

2012 ◽  
Vol 59 (1) ◽  
pp. 325-333 ◽  
Author(s):  
Małgorzata Puc
Keyword(s):  
Wind Speed ◽  
Relative Humidity ◽  
Meteorological Parameters ◽  
Birch Pollen ◽  
Pollen Grains ◽  
Maximum Temperature ◽  
Pollen Concentration ◽  
Pollen Seasons ◽  
The Individual ◽  
Two Peaks

Betula pollen is a common cause of pollinosis in northern and central Europe. The aim of the study was to characterize the birch pollen seasons in Szczecin in 2000 - 2004 and diurnal periodicity of pollen in the air. Measurements were performed using the volumetric method. The analysed meteorological parameters were the maximum temperature, relative humidity, rainfall and wind speed. The beginning and end of a season were established by the 95% method. During five studied years the highest concentration of birch pollen in the air was noted in 2003, with the pollen season starting in the middle of April and lasting till the 11<sup>th</sup> of May. The highest pollen count of 5736 grains per 1m<sup>3</sup> was observed in the end of April. Two peaks of the of birch pollen grains per 1m<sup>3</sup> were observed daily. The highest concentration was noted between 2-4 p.m. A positive and statistically significant correlation was found between the birch pollen concentration and air temperature and wind speed. A negative correlation was found in case of the relative humidity. Besides the individual rhythm of pollination, the meteorological conditions are the most important factors influencing the birch pollen concentration in the air.

scholarly journals The course of birch pollen seasons in Sosnowiec (Southern Poland) in 1997–2020 in relation to meteorological conditions

Aerobiologia ◽  
2021 ◽  
Author(s):  
Katarzyna Dąbrowska-Zapart ◽  
Tadeusz Niedźwiedź
Keyword(s):  
Wind Speed ◽  
Pollen Season ◽  
Birch Pollen ◽  
Pollen Grains ◽  
Meteorological Conditions ◽  
Maximum Temperature ◽  
Synoptic Situation ◽  
Pollen Concentrations ◽  
Pollen Seasons ◽  
The Impact

AbstractThe study's main objective was to specify the extent to which weather conditions were related to the course of birch pollen seasons in the years 1997–2020. The impact of atmospheric conditions on the daily concentrations of birch pollen grains, the Annual pollen integral (APIn), and the length of pollen seasons were studied. The dependency between each meteorological condition and various features of the birch pollen season was determined using Spearman’s rho correlation, the Kruskal–Wallis test, and cluster analysis with the k-means method. It has been shown that the duration of sunshine and average air temperature occurring within 14 days preceding the season has the most significant influence on the beginning of a birch pollen season. The value of daily birch pollen concentrations in Sosnowiec showed a statistically significant positive correlation with the duration of sunlight and the average and maximum wind speed. The daily concentration also depended on the synoptic situation: the mass airflow direction, the type of air mass inflow, and the type of weather front. The near-ground temperature influenced the APIn of birch pollen grains during the period of 14 days before the beginning of the season and the meteorological conditions occurring in the summer of the preceding year such as the maximum temperature, duration of sunlight, the maximum and average wind speed, and the relative air humidity. It was concluded that the length of birch pollen seasons decreased year by year.

scholarly journals Botanical Preferences of Africanized Bees (Apis mellifera) on the Coast and in the Atlantic Forest of Sergipe, Brazil

Sociobiology ◽  
2015 ◽  
Vol 59 (1) ◽  
pp. 97 ◽  
Author(s):  
Julio Cesar Melo Poderoso ◽  
Maria Emilene Correia de Oliveira ◽  
Tácito Moreira da Silva e Souza ◽  
Luan Carlos da Paz ◽  
Genésio Tâmara Ribeiro
Keyword(s):  
Apis Mellifera ◽  
Foraging Behavior ◽  
Atlantic Forest ◽  
Pollen Analysis ◽  
Pollen Grains ◽  
Plant Resources ◽  
Genetic Quality ◽  
Pollen Content ◽  
Africanized Bees ◽  
Adaptive Foraging

Pollen analysis in honey can be used as an alternative method to researchinto flowers visited by bees in an area. This study aimed to indentify the mainfloral families in honey from apiaries in the Atlantic Forest and Sergipe statecoast. Honey samples from these apiaries were studied, as well as plants thatgrow around them, which can be used as a source of foraging for bees. Thepalynological technique was used to compare the pollen content of honeysamples with the pollen grains from leaves of plants found in the vicinityof the apiaries to assess whether they had been visited by bees. The resultsof studies in both sites were similar in terms of incompatibility of familiesfound in the apiary vicinity and honey. Thus, it was possible to observe thatin honey samples from the coast and in the remaining Atlantic forest, thenumber of families was greater than the number of families found in theapiary vicinity, which highlights the diversity of plants visited by bees and apossible expansion of the visited area for food search. This diversity suggestsan adaptive foraging behavior to plant resources available in the environment,which may facilitate the pollination of these botanical families andconsequently improve their genetic quality.

scholarly journals The effect of meteorological conditions on hazel (Corylus spp.) and alder (Alnus spp.) pollen concentration in the air of Szczecin

2012 ◽  
Vol 60 (2) ◽  
pp. 65-70 ◽  
Author(s):  
Małgorzata Puc
Keyword(s):  
Wind Speed ◽  
Relative Humidity ◽  
Air Temperature ◽  
Pollen Season ◽  
Meteorological Parameters ◽  
Meteorological Conditions ◽  
Maximum Temperature ◽  
Pollen Count ◽  
Pollen Concentration ◽  
In The Beginning

The aim of the study was to determine seasonal variations in concentrations of hazel and alder pollen count due to meteorological parameters. Measurements were performed using the volumetric method. The analysed meteorological parameters were the maximum temperature, relative humidity, rainfall and wind speed. The beginning and end of a season were established by the 95 % method. During seven years of study, the highest concentration of hazel pollen in the air was noted in 2003 (the total number was two - three times higher than in the other years), with the pollen season starting in most years in the beginning of January and lasting till the end of March or beginning of April. The highest concentration of alder pollen in the air was noted in 2003, similarly as hazel pollen. The pollen season started in the beginning of January (in 2003 and 2006 in the beginning of March) and lasted till the turn of the March and April. The highest pollen count of 674 grains×m<sup>-3</sup> was observed in the end of March. A positive and statistically signifi cant correlation (Pearson's coeffi cient and multiple regression) was found between the hazel and alder pollen concentration and air temperature and wind speed. A negative correlation was found in case of the relative humidity. A lot of analysed correlations were signifi cant (significance level of p=0.05), although the percentage of explained variation (R<sup>2</sup>) was very low. Besides the individual rhythm of pollination, the meteorological conditions are the most important factors (mainly air temperature and wind speed) influencing the analysed pollen concentration in the air.

scholarly journals Pollen spectrum of the honey of Apis mellifera L. collected in the period of honey production

2019 ◽  
Vol 12 (6) ◽  
pp. 69
Author(s):  
A. M. V. Santos ◽  
A. S. Nascimento ◽  
J. S. Santos ◽  
S. M. P. C. Silva ◽  
C. I. S. Lucas ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Pollen Grains ◽  
Optical Microscope ◽  
Pollen Spectrum ◽  
Honey Production ◽  
Pollen Content ◽  
Pollen Types ◽  
Production Period ◽  
Sample Set

Knowledge of the flora that bees visit is important for characterization of their products and conservation of flora and fauna. Thus, this study identified the flora used by Apis mellifera L. (Hymenoptera: Apidae) during the honey production period through the pollen spectrum. Honey samples were collected at apiaries in the municipality of Cruz das Almas, Bahia, Brazil. International methods for samples preparation were used. ETOH was use for honey dilution and subsequently subjected to acidic treatment by the standard method of acetolysis. The pollen content resulting from the analysis was examined under an optical microscope, with separation and counting of pollen grains. Pollen types were identified by consultation and comparison to reference pollen collections and specialized literature. Twenty-seven pollen types distributed among 19 botanical families were identified in the sample set, and Fabaceae, Rubiaceae, Asteraceae and Sapindaceae were the families with a greater number of pollen types. The most frequent pollen types were Mimosa tenuiflora, Vernonia condensata, Bidens, Hyptis, Amaranthus spinosus, Schefflera morototoni and Serjania pernambucensis, all with relative frequency in samples equal to or greater than 70%. The honey evaluated showed a diverse pollen spectrum, evidencing multifloral characteristic.

Pollen characterization of ornamental species of Mammillaria Haw. (Cactaceae/Cactoideae)

2019 ◽  
Vol 6 (1) ◽  
pp. 13 ◽  
Author(s):  
Denise M. D. S. Mouga ◽  
Gabriel R. Schroeder ◽  
Nilton P. Vieira Junior ◽  
Enderlei Dec
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Radial Symmetry ◽  
Morphological Data ◽  
Medium Size ◽  
Ornamental Species

The pollen morphology of thirteen species of Cactaceae was studied: M. backebergiana F.G. Buchenau, M. decipiens Scheidw, M. elongata DC, M. gracilis Pfeiff., M. hahniana Werderm., M. marksiana Krainz, M. matudae Bravo, M. nejapensis R.T. Craig & E.Y. Dawson, M. nivosa Link ex Pfeiff., M. plumosa F.A.C. Weber, M. prolifera (Mill.) Haw, M. spinosissima var. “A Peak” Lem. and M. voburnensis Scheer. All analysed pollen grains are monads, with radial symmetry, medium size (M. gracilis, M. marksiana, M. prolifera, large), tricolpates (dimorphs in M. plumosa [3-6 colpus] and M. prolifera [3-6 colpus]), with circular-subcircular amb (quadrangular in M. prolifera and M. plumosa with six colpus). The pollen grains presented differences in relation to the shape and exine thickness. The exine was microechinate and microperforated. The pollen morphological data are unpublished and will aid in studies that use pollen samples. These pollen grains indicate ornamental cacti.

scholarly journals The history of settlement and agrarian land use in a boreal forest in Värmland, Sweden, new evidence from pollen analysis

2021 ◽  
Author(s):  
Sigrún Dögg Eddudóttir ◽  
Eva Svensson ◽  
Stefan Nilsson ◽  
Anneli Ekblom ◽  
Karl-Johan Lindholm ◽  
...  
Keyword(s):  
Land Use ◽  
Pollen Analysis ◽  
Large Scale ◽  
Pollen Grains ◽  
Ice Age ◽  
Valuable Insight ◽  
Archaeological Survey ◽  
History Of ◽  
New Evidence ◽  
Insight Into

AbstractShielings are the historically known form of transhumance in Scandinavia, where livestock were moved from the farmstead to sites in the outlands for summer grazing. Pollen analysis has provided a valuable insight into the history of shielings. This paper presents a vegetation reconstruction and archaeological survey from the shieling Kårebolssätern in northern Värmland, western Sweden, a renovated shieling that is still operating today. The first evidence of human activities in the area near Kårebolssätern are Hordeum- and Cannabis-type pollen grains occurring from ca. 100 bc. Further signs of human impact are charcoal and sporadic occurrences of apophyte pollen from ca. ad 250 and pollen indicating opening of the canopy ca. ad 570, probably a result of modification of the forest for grazing. A decrease in land use is seen between ad 1000 and 1250, possibly in response to a shift in emphasis towards large scale commodity production in the outlands. Emphasis on bloomery iron production and pitfall hunting may have caused a shift from agrarian shieling activity. The clearest changes in the pollen assemblage indicating grazing and cultivation occur from the mid-thirteenth century, coinciding with wetter climate at the beginning of the Little Ice Age. The earliest occurrences of anthropochores in the record predate those of other shieling sites in Sweden. The pollen analysis reveals evidence of land use that predates the results of the archaeological survey. The study highlights how pollen analysis can reveal vegetation changes where early archaeological remains are obscure.

scholarly journals Physicochemical characterization of bunches from American oil palm (Elaeis oleifera H.B.K. Cortes) and their hybrids with African oil palm (Elaeis guineensis Jacq.)

2018 ◽  
Vol 67 (1) ◽  
pp. 170-178 ◽  
Author(s):  
Gabriel Chaves ◽  
Gustavo Adolfo Ligarreto- Moreno ◽  
Daniel Gerardo Cayon-Salinas
Keyword(s):  
Oil Palm ◽  
Elaeis Guineensis ◽  
Physicochemical Characterization ◽  
Elaeis Oleifera ◽  
Elaeis Guineensis Jacq ◽  
African Oil Palm

El objetivo de este estudio fue realizar un análisis comparativo de las características físicas y químicas de racimos de genotipos de Elaeis oleifera y de sus híbridos interespecíficos OxG con Elaeis guineensis, determinando los componentes y el potencial del aceite del racimo, y la calidad de los aceites, analizando el contenido de ácidos grasos, vitamina E y carotenos. En el estudio se utilizaron racimos provenientes de inflorescencias sin polinización asistida con la presencia perimetral de E. guineensis. Se utilizó un diseño experimental completamente al azar con tres unidades experimentales, cada una conformada por tres racimos. Los mayores cuajados del fruto se encontraron en el genotipo de E. oleifera Sinú (76,53 %) y el híbrido OxG II (72,64 %). Los potenciales de extracción de aceite fueron superiores en los materiales híbridos OxG destacándose el II (20,82 %). Las palmas E. oleifera presentaron mejores perfiles de ácidos grasos, destacándose los materiales del genotipo Sinú (79,1 % de ácidos grasos insaturados) y los del híbrido II (70,2 %). Para el contenido de vitamina E se confirmó la alta calidad del aceite de los materiales de E. oleifera, sobresaliendo el genotipo Coarí (1.006,7 ppm) y el híbrido II (1.549,6 ppm); el material del genotipo Sinú registró el mayor contenido de carotenos totales (1.524,7 ppm).

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