Rainforest Canopy: Light Competition & Stratification

What is Canopy Stratification

Canopy stratification refers to the vertical layering of trees in a forest, with emergent trees at the top, followed by canopy and understory layers. Each layer has distinct characteristics due to varying light availability.

This stratification is crucial for understanding how plants compete for light and influence each other's growth and survival.

Light Competition and Beer-Lambert Law

The Beer-Lambert law describes how light intensity decreases exponentially as it passes through a medium, such as leaves. In the rainforest canopy, this means that light availability diminishes with depth, affecting plant growth.

Plants in lower layers must adapt to reduced light levels by altering their physiology or morphology.

Growth Dynamics and Michaelis-Menten Model

The Michaelis-Menten model is used to describe the rate of photosynthesis, which depends on light intensity. As light becomes a limiting factor, the growth rate of plants slows down, reflecting the efficiency with which they can use available light.

This model helps explain why canopy trees grow faster than those in the understory and how different plant species may have varying shade tolerance.

Mortality-Recruitment Loop

The mortality-recruitment loop describes the balance between tree deaths due to various factors (such as competition, disease, or environmental stress) and new trees growing from seeds in the understory.

This dynamic process leads to a stable stratification of the canopy over time, with emergent trees shading out lower layers and maintaining the overall structure of the forest.

Frequently asked questions

Try it live

Everything above runs in your browser — open Rainforest Canopy: Light Competition & Stratification (2D) and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.