Non‐random seed abscission, long‐distance wind dispersal and plant migration rates

@article{Soons2008NonrandomSA,
  title={Non‐random seed abscission, long‐distance wind dispersal and plant migration rates},
  author={Merel B. Soons and James M. Bullock},
  journal={Journal of Ecology},
  year={2008},
  volume={96}
}
1 In plants, long‐distance dispersal (LDD) is a widespread phenomenon of great importance, especially in spatial dynamics such as in metapopulations, invasions and migration. Much has become known about the mechanisms underlying LDD by wind, but selective release mechanisms have received little attention. Recent papers call for particular effort in clarification of the seed release stage of the dispersal process, which is our aim here. 2 We studied non‐random seed release at a range of spatial… 

Figures and Tables from this paper

Implications of nonrandom seed abscission and global stilling for migration of wind‐dispersed plant species
TLDR
An Inertial-Particle, Coupled Eulerian-Lagrangian Closure model was used to investigate abscission effects on seed dispersal kernels and plant population migration rates under contemporary and potential future wind conditions and confirms that nonrandom seed abscissions increased dispersal distances.
Costs and benefits of non‐random seed release for long‐distance dispersal in wind‐dispersed plant species
The dispersal ability of plants is a major factor driving ecological responses to global change. In wind-dispersed plant species, non-random seed release in relation to wind speeds has been
The timing of abscission affects dispersal distance in a wind‐dispersed tropical tree
TLDR
The approach provides a method to bridge between small turbulence scales and large ecosystem scales to predict dispersal kernels and shed light on the evolutionary processes that drive optimization of the timing of seed abscission.
Effects of canopy heterogeneity, seed abscission and inertia on wind‐driven dispersal kernels of tree seeds
1 Understanding seed dispersal by wind and, in particular, long‐distance dispersal (LDD) is needed for management of plant populations and communities, especially in response to changes in climate,
Moisture‐Dependent Morphing Tunes the Dispersal of Dandelion Diaspores
Long distance dispersal (LDD) is considered particularly important for plant range expansion. Such events are rare, however, and for wind-dispersed species updrafts or extreme weather events are
Effects of different abiotic and biotic factors on spatial primary seed dispersal in the semachorous species Scrophularia canina
TLDR
The results revealed that S. canina is a semachorous species, and its spatial seed dispersal was affected by wind gust speed and direction, plant structure and vector type, and the presence of xerochasy, individual anisotropy with strong winds, and primary short‐distance dispersal associated with successional processes independent of the vector.
Moisture-dependent morphing tunes the dispersal of dandelion diaspores
Long distance dispersal (LDD) is considered particularly important for plant range expansion (1). Such events are rare, however, and for wind-dispersed species updrafts or extreme weather events are
Improving the estimation of landscape scale seed dispersal by integrating seedling recruitment
TLDR
It is demonstrated that including the ecological characteristics of plots and post-dispersal recruitment processes realistically reduced estimates of seed dispersal distances which are otherwise grossly over-estimated using inverse modeling procedures.
Covariation in abscission force and terminal velocity of windborne sibling seeds alters long‐distance dispersal projections
TLDR
The experimental and theoretical results show that within-individual variation can strongly affect model projections of species dispersal, and have important implications for the broader understanding of population spread rates, the spatial structure of populations, metapopulation connectivity and gene flow in the landscape.
...
...

References

SHOWING 1-10 OF 49 REFERENCES
THE ROLE OF ABSCISSION IN LONG-DISTANCE SEED DISPERSAL BY THE WIND
TLDR
It is shown that an augmentation of wind speed by the abscission bias should sufficiently increase the shear-induced turbulence so that shear rivals convection as a source of updrafts in open habitats.
Seed release by invasive thistles: the impact of plant and environmental factors
TLDR
Knowing of seed release biases towards weather conditions favourable for long-distance dispersal improves the understanding of the spread of invaders and allows managers to increase the efficiency of their containment strategies by applying them at crucial times.
Release thresholds strongly determine the range of seed dispersal by wind
Environmental variability and the initiation of dispersal: turbulence strongly increases seed release
TLDR
There is a need for more quantitative studies of abscission in the field, as well as dispersal models that incorporate variability in the diaspore release phase, to suggest the strong but under-explored influence of turbulence on the initiation of dispersal.
Mechanisms of long-distance dispersal of seeds by wind
TLDR
Simulations show that uplifting above the forest canopy is necessary and sufficient for LDD, hence, they provide the means to define LDD quantitatively rather than arbitrarily, and seed uplifting probability sets an upper bound on the probability of long-distance colonization.
Effects of canopy heterogeneity, seed abscission and inertia on wind‐driven dispersal kernels of tree seeds
1 Understanding seed dispersal by wind and, in particular, long‐distance dispersal (LDD) is needed for management of plant populations and communities, especially in response to changes in climate,
DETERMINANTS OF LONG-DISTANCE SEED DISPERSAL BY WIND IN GRASSLANDS
Long-distance seed dispersal is an important topic in ecology, but notoriously difficult to quantify. Previous modeling approaches have failed to simulate long-distance dispersal, and it has remained
Long-distance dispersal of tree seeds by wind
Some mechanisms that promote long-distance dispersal of tree seeds by wind are explored. Winged seeds must be lifted above the canopy by updrafts to have a chance of further dispersal in high
A mechanistic model for secondary seed dispersal by wind and its experimental validation
1 Secondary seed dispersal by wind, the wind‐driven movement of seeds along the ground surface, is an important dispersal mechanism for plant species in a range of environments. 2 We formulate a
LONG-DISTANCE WIND DISPERSAL OF TREE SEEDS
TLDR
Two simple models for long-distance deposition are derived and it is asserted that rare wind-dispersed species in woodlots are effectively isolated from one another at the temporal scale of 1000 years.
...
...