Seed Dispersal

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Seed Dispersal


the expulsion by wind of the upper layer of soil with sown seeds and occasionally even with sprouts; observed in the presence of strong dry winds, so-called dust or black storms, particularly markedly on pulverized, structureless soil.

In seed dispersal, some of the seeds might remain in the soil, but they shift or are pushed into clumps, causing either complete destruction of the planting or uneven distribution of the sprouts. The root system of developing sprouts becomes exposed, and the plant dies. Seed dispersal most often takes place in spring in fields that had lain fallow the previous year and had been seeded with spring crops and in fall on winter sprouts planted on fallow land. Most often seed dispersal is seen in steppe regions. In the USSR it takes place in western Siberia, northern Kazakhstan, Bashkiriia, Stavropol’ Krai, and Krasnodar Krai.

Methods of fighting seed dispersal include planting tree belts and using proper crop rotation and proper systems of soil cultivation and irrigation. The All-Union Scientific Research Institute of Grain Farming in Steppe Regions has worked out methods of cultivating the soil without mold-boards, in which up to 90 percent of the stubble stays on the soil surface, safely guarding the soil from wind erosion.

References in periodicals archive ?
That is what Andy does, hoping to learn if the seed dispersal services of the cassowary play a role in the distribution of the "big red" mahogany, then undescribed by science, that dropped these fruits.
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Her research over time has focused on the ecological and evolutionary consequences of seed dispersal by Clark's nutcrackers to white-bark pine and other pine species.
Why are adaptations for longrange seed dispersal rare in desert plants?
94 hectares of forest around the apiaries performing management practices aimed at maintaining biodiversity by favoring honey species potentiate the species established in the vegetation , maintaining species in areas of use , the collection and seed dispersal mellific interest and eliminate competition from other pioneer plants scattered besides planting plant species of interest .
The topics include the large-scale influence of climate on sexually selected traits, the macroecology of harvestman mating systems, insights from a clade of neotropical fishes on underestimating the role of female preference and sexual conflict in the evolution of alternative reproductive techniques (ART) in fishes, lessons from neotropical songbirds on sexual selection and the evolution of vocal mating signals, a case study from a neotropical lek-breeding bird showing impacts of mating behavior on plant-animal seed dispersal mutualisms, and sexual selection in neotropical bats.
Like the wings on maple seeds that boost seed dispersal, natural evolution produces organisms uniquely suited for their environment or function.
Also, seed dispersal by birds leads to a broader distribution of tree species.
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How are hornbills considered important agents of seed dispersal in the tropical forests?
Necajeva, unpublished results) confirmed that seeds of this species have underdeveloped embryos at the time of maturation and seed dispersal and, in addition, seeds require dormancy-breaking treatment (cold stratification) to germinate.