A comparison of pollen data in both sites demonstrates that, as expected, the Corylus pollen rain is proportionally more important and the Quercetum mixtum pollen rain proportionally less important in the central area of the peat bog than in the periphery. (ac.be)
In Austria, the hazel ( Corylus ) pollen season potentially starts in mid-January and may last until mid-April. (pollenwarndienst.at)
To this end, the Spearman correlation was used to statistically compare the temporal trends in airborne pollen concentration monitored at the aerobiological stations which gathered the longest time-series (30-44 years) in the Benelux with a focus on the allergenic pollen taxa: Alnus, Corylus, Betula, Fraxinus, Quercus, Platanus, Poaceae, and Artemisia. (lih.lu)
Taxa1
Seven pollen types dominate the pollen spectrum, the herbaceous families of Poaceae (grasses) and Cyperaceae (sedges), as well as several native tree and shrub taxa, Acacia, Callitris, Casuarina, Arecaceae and Myrtaceae. (edu.au)
Fungal spore3
It is unclear whether climate change has resulted in changes in the exposure-response function between temperature and pollen/fungal spore concentrations over time. (bvsalud.org)
This study examined associations between temperature and pollen/fungal spores in different time periods and assessed potential adaptation using the longest pollen/fungal spore dataset in existence (52 years). (bvsalud.org)
Preliminary health outcomes reveal a positive association between hay fever, Poaceae and Acacia pollen, as well as a significant association between total fungal spore concentrations and asthma. (edu.au)
Spores6
La tourbière du Misten (Hautes-Fagnes, Belgique), épaisse de 7 mètres, a été étudiée avec pour objectifs la reconstitution de l'évolution de la tourbière et des conditions de la formation de la tourbe, à partir de l'analyse des grains de pollen et spores, des thécamoebiens, ainsi que de la géochimie. (ac.be)
Exposure to pollen and fungal spores can trigger asthma/allergic symptoms and affect health. (bvsalud.org)
Rising temperatures from climate change have been associated with earlier seasons and increasing intensity for some pollen, with weaker evidence for fungal spores. (bvsalud.org)
Daily concentrations of pollen (birch and grass) and fungal spores (Cladosporium, Alternaria, Sporobolomyces and Tilletiopsis) collected between April and October from Derby (1970-2005) and Leicester (2006-2021), UK, were analysed. (bvsalud.org)
In 2000-2021, daily concentrations of birch pollen tended to remain at higher levels, vs. decrease during 1990s, when Tmean was between 13 and 15 °C. Our study suggests higher temperatures experienced in recent decades are associated with higher overall abundance of some pollen/fungal spores, which may increase future disease burdens of allergies. (bvsalud.org)
Here, we present a new paleoecological study with exceptional chronological time control using pollen, spores and microscopic charcoal from Moossee (Swiss Plateau, 521 m a.s.l.) to reconstruct the vegetation and fire history over the last ca. 19 000 years. (copernicus.org)
Species7
many species superficially resemble terrestrial grasses of the family Poaceae. (wikipedia.org)
The Darwin record contrasts significantly with surveys conducted in the subtropical and temperate cities of Australia where temperature as opposed to rainfall and the prevalence of northern hemisphere exotic tree species have a greater influence over the seasonality and composition of the pollen loads. (edu.au)
Most arboreal species showed an overall trend toward an increase in the annual pollen integral and peak values and an overall trend toward an earlier start and end of the pollen season, which for Betula resulted in a significant decrease in season length. (lih.lu)
For the herbaceous species (Poaceae and Artemisia), the annual pollen integral and peak values showed a decreasing trend. (lih.lu)
Allogamous Poaceae species exhibit a unique gametophytic SI system controlled by two multi-allelic and independent loci, S and Z. Despite intense research efforts in the last decades, the genes that determine the initial recognition mechanism are yet to be identified. (aber.ac.uk)
Ultimately, comparative genomic analyses across a wide range of self-compatible and self-incompatible Poaceae species revealed that the absence of a functional copy of at least one of the six putative SI determinants is accompanied by a self-compatible phenotype. (aber.ac.uk)
At the Kongou falls, it was found in fast-flowing current, but also at the base of falls, on rocks constantly receiving droplets from the falls, located ca 2 m above the water level, and mixed with an undetermined Poaceae species. (plazi.org)
Cyperaceae1
Data from rbcL studies also support the view that Cyperaceae and Poaceae are not closely related (M. R. Duvall et al. (neonscience.org)
Lolium1
Here, we report the fine-mapping of the Z-locus in perennial ryegrass (Lolium perenne L.) and provide evidence that the pollen and stigma components are determined by two genes encoding DUF247 domain proteins (ZDUF247-I and ZDUF247-II) and the gene sZ, respectively. (aber.ac.uk)
Grains3
Crustaceans (such as crabs, Majidae zoae, Thalassinidea zoea) and syllid polychaete worm larvae have both been found with pollen grains, the plant producing nutritious mucigenous clumps of pollen to attract and stick to them instead of nectar as terrestrial flowers do. (wikipedia.org)
The family is characterized by the occurrence of a number of unusual cytological features including: (1) chromosomes with diffuse centromeres, (2) post-reductional meiosis, and (3) pollen grains formed from tetrads in which 3 of the 4 microspores fail to develop. (neonscience.org)
Juncaceae also have pollen in tetrads, but in that family all four microspores produce pollen grains. (neonscience.org)
Ecosystem1
After lake formation in response to deglaciation, five major pollen-inferred ecosystem rearrangements occurred at ca. 18 800 cal BP (establishment of steppe tundra), 16 000 cal BP (spread of shrub tundra), 14 600 cal BP (expansion of boreal forests), 11 600 cal BP (establishment of the first temperate deciduous tree stands composed of, e.g. (copernicus.org)
Airborne pollen6
Airborne pollen is a major cause of allergic rhinitis, affecting between 10 and 30% of the population in Belgium, the Netherlands, and Luxembourg (Benelux). (lih.lu)
The datafile contains the composition and abundance of airborne pollen for the location of Murdoch University, Perth, Australia. (tern.org.au)
The datafile contains the composition and abundance of airborne pollen in Dunedin, New Zealand. (tern.org.au)
The data was collected for the period from October 1992 to February 1993 as part of a nationwide survey of airborne pollen. (tern.org.au)
The datafile contains the composition and abundance of airborne pollen in the suburb of Casuarina, Darwin, Northern Territory, Australia. (tern.org.au)
The datafile contains the composition and abundance of airborne pollen in the suburb of Sandy Bay (University of Tasmania), Hobart, Tasmania, Australia. (tern.org.au)
Betula1
In all, these results show that temporal variations in pollen levels almost always follow a common trend in the Benelux, suggesting a similar force of climate change-driven factors, especially for Betula where a clear positive correlation was found between changes in temperature and pollen release over time. (lih.lu)
Charcoal3
We analyzed a dataset composed of multiple palaeoclimate and lake-sediment pollen and charcoal records from New England to explore how postglacial changes in forest composition and spatial patterns of vegetation and fire were controlled by regional-scale climate change, a subregional environmental gradient, and landscape-scale variations in soil characteristics. (harvard.edu)
We analyzed pollen and charcoal records from 30+ study sites, using multivariate cluster analysis of pollen data to visualize changes in the composition and spatial patterns of vegetation during the last 14,000 yrs. (harvard.edu)
The pollen and charcoal data were compared with temperature and precipitation reconstructions. (harvard.edu)
Sediments2
In varved sediments it is possible to assess yearly flux rates of pollen, to define rates of palaeoenvironmental changes and to describe them on decadal and even subdecadal scales (Birks and Birks 2006 ). (springer.com)
Holocene palaeoecological reconstructions including pollen studies from varved sediments were obtained for several European areas, for instance in Scandinavia (Anderson et al. (springer.com)
Genes1
We also extracted three datasets, i.e., the whole plastomes, non-coding regions and protein-coding genes, for phylogenetic analyses and compared these plastome trees with the ITS tree. (biomedcentral.com)
Plants1
Allergenic pollen is produced by wind pollinating plants and released in relatively low to massive amounts. (lih.lu)
Analyses1
Sampling localities are coloured according to the mitochondrial (mtDNA) haplotype groups and distinct genetic lineages identified in analyses of the ddRADseq (nuDNA) dataset (Figure 2). (blogspot.com)
Exposure2
Current climate changes, in combination with increasing urbanization, are likely to affect the presence of airborne allergenic pollen with respect to exposure intensity, timing as well as duration. (lih.lu)
He has worked on a range of projects examining environmental exposures and health outcomes including exposure to metals, pollen, mould, chronic exposures to low levels of chemicals, pesticide and cyanotoxins. (edu.au)
Grasses1
Seventy percent of the yearly pollen load is captured during the dry season, with the peak pollen period occurring at the onset of the dry season (April-May) when most grasses are in flower. (edu.au)
Temporal1
The comparison of our data with other pollen datasets from the region confirms significant spatio-temporal differences in the initiation of large-scale woodland clearings in the Great Masurian Lake District. (springer.com)
Seasons3
The pollen loads were found to have a strong seasonal component associated with the alternating wet (November to March) and dry (April to October) seasons of the region. (edu.au)
The season timing of Poaceae showed a trend toward earlier starts and longer seasons in all locations. (lih.lu)
The dynamics in the observed trends can impact allergic patients by increasing the severity of symptoms, upsetting the habit of timing of the season, complicating diagnosis due to overlapping pollenseasons and the emergence of new symptoms due allergens that were weak at first. (lih.lu)
Assessment1
The assessment of the current pollen situation in Austria can be found in the latest written forecast . (pollenwarndienst.at)
Forecast1
Please use the model data only in combination with the written forecast, which is based on phenological observations and actual pollen data. (pollenwarndienst.at)
Darwin1
Pollen loads in the atmosphere of Darwin, a city located in the wet-dry tropics of Australia, have been monitored for the period March 2004 to November 2005 as part of a large research program looking at atmospheric particles and human health. (edu.au)
Vegetation1
Holocene vegetation features recorded in pollen deposition reflect both short lasting vegetation disturbances and prolonged changes caused by natural climatic processes. (springer.com)
Family2
Because of morphologic similarities in vegetative and inflorescence characters, the family has commonly been associated with Poaceae. (neonscience.org)
Tall fescue ( Festuca arundinacea Schreb), belonging to the family poaceae, is an economically important cool season turfgrass and forage that is widely planted in temperate zones. (biomedcentral.com)
Time1
Investigating variations in such relatively short periods of time requires high-resolution pollen analysis, which is considered to be a priority in modern multidisciplinary investigations of palaeoenvironmental changes (e.g. (springer.com)
Analysis1
A seven metres thick peat bog (Misten, Hautes-Fagnes, Belgium) has been studied at high resolution in order to reconstruct the conditions of peat formation and evolution on the basis of pollen, testate amoebae analysis, and geochemistry. (ac.be)
Although the total number of assembled transcripts increased with increasing sequencing data, the proportion of unassembled transcripts became saturated as revealed by plant BUSCO datasets. (biomedcentral.com)
Health1
He currently researches pollen and health outcomes as well as chronic kidney disease in low to middle income countries. (edu.au)
Public1
This dataset is released to the public under Creative Commons CC0 1.0 (No Rights Reserved). (harvard.edu)