Their dispersal, therefore, must have been extremely slow and gradual.
DISSOCIATION, a separation or dispersal, the opposite of association.
Experience with epidemics, dearly bought in the past, has shown that one fruitful cause is the laying open to the inroads of some Fungus or insect, hitherto leading a quiet endemic life in the fields and forests, large tracts of its special food, along which it may range rampant without check to its dispersal, nutrition and reproduction.
Finally in the yew, as a type of the family Taxeae, the ovules occur singly at the apex of a lateral branch, enclosed when ripe by a conspicuous red or yellow fleshy arillus, which serves as an attraction to animals, and thus aids in the dispersal of the seeds.
The conclusion that has been frequently drawn from these facts, that all the Indo-Germanic stocks before their dispersal worshipped a personal High God, the Sky-Father, has been now seen to be hazardous.'
It would seem from this distribution that the Malays are not continental, but a seafaring race with exceptional powers of dispersal, who have spread over the ocean from some island centre - perhaps Java.
Kinch before their dispersal, and were published in 1914.
The defeat and dispersal of the Boer armies, and the apparent collapse of Boer resistance, induced a hope that the war was over; and the government seized the opportunity in Tb iooo to terminate the parliament, which had already of endured for more than five years.
I authorized the dispersal of two tons of water and twenty cases of rations from the emergency site in Raleigh along with hazmat drivers and twelve vehicles.
The seeds of some genera depend on animals for dispersal, the carpellary scale (Microcachrys) or the outer integument being brightly coloured and attractive.
- The destruction of Jerusalem was followed by the dispersal of the Jews, of whom till then it had been the religious and political centre.
Each "conidium" contains numerous nuclei and is really a zoosporangium, as after dispersal it breaks up into a number of zoospores.
In addition to these accidental modes of dispersal, however, there is a series of interesting adaptations on the part of the fungus itself.
For instance, a Fungus epidemic is impossible unless the climatic conditions are such as to favor the dispersal and germination of the spores; and when plants are killed off owi~ig to the supersaturation of the soil with water, it is by no means obvious whether the excess of water and dissolved materials, or the exclusion of oxygen from the root-hairs, or the lowering of the temperature, or the accumulation of foul products of decomposition should be put into the foreground.
The dispersal by the National Guard, under his orders, of the riotous assembly in the Champ de Mars (July 17, 1791) rendered him obnoxious to the infuriated populace, and he retired to Nantes, where he composed his Memoires d'un temoin (published in 3 vols.
Spore Distribution: Fulton, "Dispersal of the Spores of Fungi by Insects," Ann.
This line of hypothesis and demonstration is typical of the palaeogeographic methods generally - namely, that vertebrate palaeontologists, impressed by the sudden appearance of extinct forms of continental life, demand land connexion or migration tracts from common centres of origin and dispersal, while the invertebrate palaeontologist alone is able to restore ancient coast-lines and determine the extent and width of these tracts.
As regards their geographical distribution, fungi, like flowering plants, have no doubt their centres of origin and of dispersal; but we must not forget that every exchange of wood, wheat, fruits, plants, animals, or other commodities involves transmission of fungi from one country to another; while the migrations of birds and other animals, currents of air and water, and so forth, are particularly efficacious in transmitting these minute organisms. Against this, of course, it may be argued that parasitic forms can only go where their hosts grow, as is proved to be the case by records concerning the introduction of Puccinia malvacearum, Peronospora viticola, Hemileia vastatrix, &c. Some fungi - e.g.
The remaining books relate the exploits of Neoptolemus, Eurypylus and Deiphobus, the deaths of Paris and Oenone, the capture of Troy by means of the wooden horse, the sacrifice of Polyxena at the grave of Achilles, the departure of the Greeks, and their dispersal by the storm.
Australasia had then as now a peculiar flora of its own, though the former wide dispersal of the Proteaceae and Myrtaceae, and also the large number of Amentaceae then found in Australia, make the Eocene plants of Europe and Australia much less unlike than are the present floras.
Wind dispersal of the spores would account for mysterious appearances of the disease, in some years almost every straw in a wheat-field being affected, while in other years scarcely one is attacked.
Towards the further development of events in France, therefore, Leopold assumed at first a studiously moderate attitude; but his refusal to respond to the demand of the French government for the dispersal of the corps of emigres assembled under the protection of the German princes on the frontier of France, and the insistence on the rights of princes dispossessed in Alsace and Lorraine, precipitated the crisis.
The chief agents in their dispersal were the Doctor Orazio Melzi who possessed them in the last quarter of the 16th century; the members of a Milanese family called Mazzenta, into whose hands they passed in Orazio Melzi's lifetime; and the sculptor Pompeo Leoni, who at one time entertained the design of procuring their presentation to Philip II.
The pollination, of flowers and the dispersal of seeds by various animals are biological factors; but pollination and dispersal by the wind cannot be so regarded.
Thus all recent discovery tends to carry the centres of origin and of dispersal of all animal types farther and farther back in geological time.
Ortmann has traced the centre of dispersal of the fresh-water Crawfish genera Cambarus, Potamobius and Cambaroides to eastern Asia, where their common ancestors lived in Cretaceous time.
In a vinery, tomatohouse or a peach-house it is often good practice at the time of flowering to tap the branches smartly with a stick so as to ensure the dispersal of the pollen.
- Ordinary conidia and similarly abstricted dry spores are so minute, light and numerous that their dispersal is ensured by any current of air or water, and we also know that rats and other burrowing animals often carry them on their fur; similarly with birds, insects, slugs, worms, &c., on claws, feathers, proboscides, &c., or merely adherent to the slimy body.
Professor Kirsopp Lake has (1903) written four valuable articles (Journal of Theological Studies, iv., v.) on "The Greek monasteries of South Italy"; he deals in detail with their scriptoria and the dispersal of their libraries, a matter of much interest, in that some of the chief collections of Greek MSS.
dispersal of asylum seekers with HIV.
In the case of the southern continents the difficulty is, however, to determine whether allied groups of mammals (and other animals) have reached their present isolated habitats by dispersal from the north along widely sundered longitudinal lines, or whether such a distribution implies the former existence of equatorial land-connexions.
External evidence, which recognizes no universal deluge and no dispersal of mankind in the third millennium B.C., throws its own light upon the opening centuries of the second.
Meanwhile he annulled the sitting of the Juii9e 23, 17th, and demanded the immediate dispersal of the Assembly.
After the final dispersal of the Danish invaders Alfred turned his attention to the increase of the navy, and ships were built according to the king's own designs, partly to repress the ravages of the Northumbrian and East Anglian Danes on the coasts of Wessex, partly to prevent the landing of fresh hordes.
Each of the uplands is a centre for the dispersal of streams; but with only one prominent exception (the Humber) these reach the sea without crossing into the Eastern Division of the country.
dispersal of patrons would be expected.
This has perhaps been made more significant by the increased geographical dispersal of the population.
The disk seeds have a pappus of hairs for wind dispersal.
supernatant liquor is generally pathogen free and can be used for pasture irrigation without the drawbacks associated with raw effluent dispersal.
In the traditional genealogy of the Hellenes, Ion, the ancestor of the Ionians, is brother of Achaeus and son of Xuthus (who held Peloponnese after the dispersal of the children of Hellen).
The characters of the fruit and seed and the means for ensuring the dispersal of the seeds are also very varied (see Fruit) .
Many water plants rely more on vegetative reproduction than on seeds for dispersal.
vegetative reproduction than on seeds for dispersal.
A consideration of the biology of the sorus gives an insight into the advantages obtained by the one type over the preceding, as regards protection, spore production and the dispersal of the spores, and thus indicates the way in which natural selection may have acted.
Fortunately, on the very day of the dispersal of the Legislative Assembly, Dumouriez saved France from a Prussian invasion by the victory of Valmy, and by unauthorized negotiations which prefigured those of Bonaparte at Loben (September 22, 1792).
Or, rather, we should perhaps say that ancient floras suggest recent dispersal from the place of origin, and less time in which to vary and become modified by the loss of different groups in the two continents.
For the purposes of such zoo-geographical divisions, mammals are much better adapted than birds, owing to their much more limited powers of dispersal; most of them (exclusive of the purely aquatic forms, such as seals, whales, dolphins and sea-cows) being unable to cross anything more than a very narrow arm of the sea.
There is another point of view from which mammals are of especial importance in regard to geographical distribution, namely their comparatively late rise and dispersal, or " radiation," as compared with reptiles.
Gelatinous or mucilaginous degenerations of cell-walls are frequently employed in the interests of spore dispersal.
Over-wintering of transgenic sugar beet was found to be a source for dispersal of transgenic pollen  .
blocking the clines, and so eliminating dispersal, radically alters the picture (Fig.
colonizer, seeds of some non-forest early colonizing species are not adapted to dispersal by a particular agent.
Hypothesis: The rate and scale of dispersal of freshwater diatom species is a function of their global abundance.
dispersal of transgenic pollen  .
dispersal of disease spores like those of black spot (Colletotrichum acutatum) is reduced by straw mulch.
dispersal of pollutants is optimal.
dispersal of seeds.
Not least of these was the geographic dispersal of the personnel involved.
Once established, the rates and routes for subsequent dispersal of introduced species are of particular interest for limiting or mitigating impacts.
The researchers claim this result allows them to reject the well-known Express Train theory which focuses on a rapid dispersal from Taiwan to Polynesia.
dispersal zone around Preston Park.
dispersal order can result in a fine up to £ 2,500 or three months in jail.
dispersal prison place per annum.
dispersal mechanisms; otherwise they would not be there!
dispersal sales in the region.
Bower, MA, 1992, Cereal pollen dispersal: a pilot study.
Short distance seed dispersal is possible in mud on the tires of farm vehicles.
Some rely on insects for spore dispersal, whilst others use people or animals to ensure their spread.
Ongoing research links: Structural controls on sediment dispersal pathways and sand distributions.
The move comes because the city has passed its limit under the government's asylum seeker dispersal scheme.
The results indicated that dispersal was more important than seedling establishment in controlling spread of these species.
flora affected by dispersal processes?
How is the genetic diversity of Europe's aquatic flora affected by dispersal processes?
However, with no planktonic larva the dispersal of the mutation will be slow.
long distanceof the paper, Dr. Jean-Francois Arnaud, says " our findings are consistent with the hypothesis of human-mediated long-distance dispersal.
The whole science of seed dispersal is just absolutely phenomenal.
seed dispersal mechanism.
spore dispersal, whilst others use people or animals to ensure their spread.
This was the final dispersal of the Ma melukes.) With the nomad Shagia, who dominated the district, Various lists and dates of reign of the rulers of Sennar are given; reference may be made in Stokvis's Manuel d'histoire vol.
Persistence and Spread: There is no obvious seed dispersal mechanism.
The supernatant liquor is generally pathogen free and can be used for pasture irrigation without the drawbacks associated with raw effluent dispersal.
What penalties exist for early dispersal of the account?
It's best to take a sum of cash with you or to check with your hotel to see if alternative cash dispersal arrangements can be made.
In 1377 the reformer appeared before Archbishop Sudbury and Courtenay, when an altercation between the duke and the bishop led to the dispersal of the court, and during the ensuing riot Lancaster probably owed his safety to the good offices of his foe.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.