Pollen and tree ring analysis indicates the Chang Tang plateau was a much more livable environment until becoming drier and colder starting around 1500 BC.
pollen | Pollen | Pollen's Vanga | Arabella Pollen |
The aeroplankton comprises numerous microbes, including viruses, about 1000 different species of bacteria, around 40,000 varieties of fungi, and hundreds of species of protists, algae, mosses and liverworts that live some part of their life cycle as aeroplankton, often as spores, pollen, and wind-scattered seeds.
Between 1809 and 1822 Mrs. Ibbetson contributed more than fifty papers to Nicholson's Journal and the Philosophical Magazine on the microscopic structure and physiology of plants, including such subjects as air-vessels, pollen, perspiration, sleep, winter-buds, grafting, impregnation, germination, and the Jussieuean method.
In the Swiss Neolithic settlement of Thayngen-Weier (Cortaillod culture) there is a high concentration of pollen from A. ursinum in the settlement layer, interpreted by some as evidence for the use of A. ursinum as fodder.
Andrena agilissima is an oligolectic species, feeding only on pollen of a few genera of Cruciferous vegetables (Brassicaceae species, as Brassica napus, Brassica rapa, Raphanus raphanistrum, Barbarea vulgaris and Sinapis species).
Andrena hattorfiana is an oligolectic species, feeding its young only on pollen of a few species of Dipsacaceae (Knautia arvensis, Scabiosa columbaria, Centaurea species).
Varieties that can provide compatible pollen for Belle de Boskoop are James Grieve, Melba and Reine des Reinettes.
Trees within the order Fagales possess particularly potent allergens, e.g. the prototypical Bet v1, the major white birch (Betula verrucosa) pollen antigen.
It collects nectar and pollen from flowering plants as, for example, Cephalaria sp.
Brown was studying pollen grains of the plant Clarkia pulchella suspended in water under a microscope when he observed minute particles, ejected by the pollen grains, executing a jittery motion.
Celtis reticulata was one of the species analyzed in a pollen core samplng study in northern Arizona, in which the early to late Holocene flora association was reconstructed; this study in the Waterman Mountains-(Pima County-S.East AZ) demonstrated that C. reticulata was found to be present after the Wisconsinan glaciation, but is not a current taxon of this former Pinyon-juniper woodland area which is now in central and northern Arizona.
Adult males and females feed also on nectar and pollen of flowers (mainly Leucanthemum vulgare).
However, preliminary results from Co-Extra, a current project within the EU research programme, show that although cleistogamy reduces gene flow, it is not at the moment a consistently reliable tool for biocontainment: due to a certain instability of the cleistogamous trait, some flowers may open and release genetically modified pollen.
The son of Hugh Pollen, a dock master, Pollen was born in Ringsend, Dublin.
Engelhardia pollen has been found in deposits of Miocene Age in Denmark.
Pollen's name is commemorated in the species epithet's of the Comoros Olive Pigeon (Columba pollenii), of the Pollen's Vanga (Xenopirostris polleni), of the Mayotte chameleon (Furcifer polleni), and the Madagascar coastal skink (Madascincus polleni).
Some newer vacuum cleaners have high-efficiency particulate air filtration (HEPA) filters attached, which, when combined with the special bags, are effective in trapping almost 100% of allergens, including ragweed, dust mites, and grass pollen.
If large amounts of GM pollen fertilise crops in a non-GM field, that harvest may no longer be declared "GM-free", and will require appropriate labelling if its GM content exceeds a certain limit (e.g. 0.9 percent in the European Union).
The loganberry was derived from a cross between Rubus ursinus (R. vitifolius) 'Aughinbaugh' as the female parent and Rubus idaeus 'Red Antwerp' as the male parent (pollen source).
Reed is allergic to dust mites, oak pollen, tropical grasses, and various plant enzymes, including bromelin, which, ironically, is found in pineapple, his favorite food.
The species has been confirmed to have been native to northern Arizona since at least the Late Wisconsin late glacial period based upon pollen core analysis at the Waterman Mountains (Coconino County) - (not the Waterman Mountains of Pima County); dominant trees of Juniperus osteosperma and Pinus monophylla remain extant species to the present time in this predominantly Pinyon-juniper woodland.
In addition to these the museum houses other historical herbarium collections including those of Jean-François Gaudin (1766-1833) and Johann-Christoph Schleicher (1770-1834), as well as specialized collections of lichens, mosses, algae and fungi, myxomycetes (Myxogastria), and samples of seeds and pollen.
Grew's work on pollen was more extensive than that of Malpighi, leading to the discovery that although all pollen is roughly globular, size and shape is different between species, however, pollen grains within a species are all alike.
Pollen from the tree was found near the Antarctic Peninsula showing that it formerly grew in Antarctica since the Eocene period.
However, a few plants whose pollen contains toxic substances (e.g., Toxicoscordion and related genera in the Melanthieae) are visited by oligolectic bees, and these may fall into the former category.
Two of the major allergens in the pollen of short ragweed (Ambrosia artemisiifolia) are Amb aI and Amb aII.
The Mangrove Hummingbirds of Costa Rica live off the relatively large quantity of pollen produced by its prolific blooms.
The family descended from Edward Pollen (d. 1636), a London merchant originally from Lincolnshire.
Karl von Frisch and other bee researchers have observed that individual honey bees vary in their efficiency in packing pollen into the pollen basket; some are more efficient, others less.
Another report states that pollen tubes do not change growth direction under AC electric fields.
At present nine main pollen zones, I-IX, are defined, based on the work of J. Iversen, published in 1954.
Pollen found in the clays near Portland, Maine indicate spruce forests, with low proportions of pines, about 11500 BP.
of pollen and other microfossils from a core sample taken in an intermontane valley of the Segura mountains in southern Spain finds P. prostrata in a "Prunus type" located in two radiocarbon-dated zones from about 2630 BP to about 1550 BP and again from about 790 BP to present.
The Motu Manawa (Pollen Island) Marine Reserve covers all of the harbour adjacent to the north and east of the peninsula, including Pollen and Traherne Islands.
Tasmanian pygmy possums are omnivorous, feeding on insects, spiders, small lizards, nectar, and pollen, the latter two primarily coming from Banksia and eucalypts.
They can be encountered from June through September feeding on small insects and on nectar and pollen of flowers (especially on Apiaceae species).
They can be encountered from May through late summer feeding on small insects and on nectar and pollen of flowers from various plants (mainly Apiaceae family, as Anthriscus sylvestris, Hogweed (Heracleum sphondylium), but also on Rubus fruticosus and Crataegus monogyna.
Fossil pollen assigned to the genus has been recognized from the Palaeocene - Eocene boundary.
The earliest fossils, including pollen and flowers, have been recovered from late Cretaceous deposits.
The adults feed on nectar and pollen (mainly on Valeriana officinalis, Geranium sylvaticum, Centaurea jacea, Cirsium palustre, Epilobium angustifolium, etc), with preference for blue flowers.
The yellow-bellied glider's diet consists of nectar, honeydew, insects, pollen and a wide spread of tree sap including different Eucalyptus sap, Corymbia sap, some Angophora sap, and Lophostemon sap.