کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6368820 | 1623798 | 2017 | 8 صفحه PDF | دانلود رایگان |
- We present a percolation model of a growing plant.
- Some parts of the organism stop by rooting, while others move on by horizontal growth and branching.
- We describe a new kind of threshold, pt, that is higher than the classical percolation threshold.
- Below pt, the plant cannot track along the pathways of suitable habitat.
- The demonstrated “labyrinth effect” is a considerable factor in the self-organization of plant communities.
The "ant in the labyrinth" problem describes spatial constraints upon a moving agent in a disordered medium. In contrast with an animal-like agent (an "ant"), a clonal plant can stay in a place and move at the same time: some parts develop roots, while others continue moving by horizontal growth and branching. Hereby we present a spatially explicit, dynamic model for the study of percolation by plant growth rules in lattices that consist of open and closed sites. Growth always starts from a single seed in an open percolation cluster (patch). By increasing the proportion of open sites (p), we describe a new kind of threshold (the “tracking threshold”, approximately pt=0.73), which is higher than the site percolation threshold (pc=0.5 in this lattice). At pc
Journal: Journal of Theoretical Biology - Volume 412, 7 January 2017, Pages 146-153