Spatial patterns in the tropical forest reveal connections between negative feedback, aggregation and abundance
Related Experiment Video
Updated: Apr 11, 2026

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging
Published on: April 18, 2025
1Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel.
Abstract:
The spatial arrangement of trees in a tropical forest reflects the interplay between aggregating processes, like dispersal limitation, and negative feedback that induces effective repulsion among individuals. Monitoring the variance-mean ratio for conspecific individuals along length-scales, we show that the effect of negative feedback is dominant at short scales, while aggregation characterizes the large-scale patterns. A comparison of different species indicates, surprisingly, that both aggregation and negative feedback scales are related to the overall abundance of the species. This suggests a bottom-up control mechanism, in which the negative feedback dictates the dispersal kernel and the overall abundance.
Related Concept Videos
Population Growth
Symbiosis
Distribution and Dispersion
Habitat Fragmentation
Optimal Foraging
Trophic Efficiency

