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Long-distance seed dispersal in plant populations.
It is argued that genetic methods provide a broadly applicable way to monitor long-distance seed dispersal and, hence, that better data is needed from the tails of seeds that travel long distances.
SEED DISPERSAL AND THE HOLOCENE MIGRATION OF WOODLAND HERBS
The distribution of many woodland herbs extends 1000-2000 km in a north- south direction, yet the majority of these species grow clonally, have little recruitment by seed, and possess no obvious…
Methods for estimating long-distance dispersal
This work critically review the main methods employed in studies of dispersal, in order to facilitate the evaluation of their pertinence to specific aspects of LDD research, and identifies six main methodological groups: biogeographical: Eulerian and Lagrangian movement/redistributiona; short-term and long-term genetic analyses; and modeling.
ARE LONG‐DISTANCE DISPERSAL EVENTS IN PLANTS USUALLY CAUSED BY NONSTANDARD MEANS OF DISPERSAL?
It is concluded that the relationship between morphologically defined dispersal syndrome and long-distance dispersal is poor, and understanding gleaned from the often anecdotal literature on nonstandard and standard means of long distance disperseal is the foundation for both statistical and mechanistic models of long- distance dispersal.
Random Search by Herbivorous Insects: A Simulation Model
- M. Cain
- Environmental Science
- 1 June 1985
Results from the model suggest that under many conditions clumping by plants can be an effective escape strategy from searching herbivores, contradicting the claim that plant spatial distribution does not affect insect searching success.
Spatio‐temporal dynamics of the Allonemobius fasciatus– A. socius mosaic hybrid zone: a 14‐year perspective
Very large year‐to‐year variation in the relative growth rates of pure species and hybrid individuals is found, which may reflect the fact that both species are at the edge of their range and perhaps at the limits of their ability to deal with environmental perturbations.
Sampling spatial and temporal variation in soil nitrogen availability
The use of ion exchange membrane spikes is described, a relatively nondestructive way to measure how soil resources at a given point in space fluctuate over time, to examine spatial patterns of soil ammonium and nitrate availability in a mid-successional coastal dune for four periods of time during the growing season.
A Spatially Explicit Test of Foraging Behavior in a Clonal Plant
Empirically calculated diffusion models indicate that habitat complexity has considerable impact on the long—term expansion of clones: only in the heterogeneous treatment did clones expand less rapidly in favorable habitat than they did in unfavorable habitat.
CLONAL GROWTH AND RAMET PERFORMANCE IN THE WOODLAND HERB, ASARUM CANADENSE
As has been observed for some other clonal plant species, few costs were found for either sexual or asexual reproduction and Asarum canadense appears to be under unusually strong selection for seedling survival.