Journal Article10.1139/B92-283
Fruit abscission in Acer saccharinum with reference to seed dispersal
TL;DR: It is hypothesized that seeds preferentially abscise at higher velocities because the motive force for abscission is drag (proportional to the square of the wind velocity), and micrometeorological models of dispersal must be modified to account for the nonrandom nature of abscissions.
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Abstract: Winged fruits and seeds travel approximately twice as far as predicted by micrometeorological models of seed dispersal by the wind. We hypothesize that seeds preferentially abscise at higher velocities because the motive force for abscission is drag (proportional to the square of the wind velocity). A 3-year study of fruit abscission in Acer saccharinum L., supplemented by experimental studies, demonstrates that for this species (i) separation layers develop rapidly when relative humidity is low (the early afternoon in a typical diurnal relative humidity cycle), and (ii) the exponents in power law equations relating abscission rate to wind speed are somewhat higher than the expected value of 2.0. Consequently, micrometeorological models of dispersal must be modified to account for the nonrandom nature of abscission. Key words: seed dispersal, abscission, Acer saccharinum.
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Citations
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References
The role of animals in dispersing a "wind-dispersed" pine'
TL;DR: Jeffrey pine seeds appear to be dispersed in two phases; seeds are initially scattered by the wind, and subsequently carried farther and cached in soil by animals.
138
The origin and development of the compositæ.
TL;DR: The variation in structure of styles and stamens is described and discussed in separate sections, while their functions in the pollen-presenting mechanism is considered partly in section D of the present chapter and partly in Chapter III which deals with the irritability of the mechanism.
112
Estimation of long term concentrations using a universal wind speed distribution
R. E. Luna,H. W. Church +1 more
TL;DR: In this paper, it is shown that speed distributions from many diverse sites possess a quasi-universal shape which, when approximated analytically, can be adjusted to yield a distribution of wind speeds which have some specified mean value.
87
Seed dispersal of the endangered virginia round-leaf birch (Betula uber)
TL;DR: Dispersal of samaras about a single individual of Betula uber was investigated following maturation of the fruits in the late summer of 1979, suggesting that B. uber is capable of invading new sites at considerable distances from the seed source.
45
Dispersal of the winged fruits of Nuytsia floribunda (Loranthaceae)
TL;DR: Evidence that suckering may play a major role in the spread of this species is supported, as well as the importance of wind velocity in the distance reached by fruits and the absence of biotic dispersal agents.
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