Defaunation and Seed Dispersal Collapse: Understanding Ecological Impacts

What is Defaunation?

Defaunation refers to the reduction or loss of animal populations in an ecosystem. This can be due to hunting, habitat destruction, climate change, or other human activities.

In the context of seed dispersal, defaunation specifically targets large-bodied frugivores—animals that eat fruits and disperse seeds through their droppings.

The Role of Large-Seeded Trees

Large-seeded trees rely on large-frugivorous animals for seed dispersal, as these species can consume larger fruits and spread the seeds over greater distances.

Without such animals, large-seeded tree populations may decline due to reduced recruitment rates and lower genetic diversity.

Mechanisms of Seed Dispersal Collapse

The removal of large-bodied frugivores leads to a decrease in the distance seeds are dispersed, which can result in local seed accumulation and increased competition for resources.

This collapse in dispersal networks can lead to changes in forest composition, with smaller-seeded species becoming more dominant.

Implications for Biodiversity

The loss of large-seeded tree species can have cascading effects on the entire ecosystem, affecting not only plant diversity but also other animal and microbial communities.

Conservation efforts must consider the importance of maintaining large-frugivorous populations to preserve forest structure and function.

Frequently asked questions

Try it live

Everything above runs in your browser — open Defaunation & Seed Dispersal Collapse (2D Forest Plot) and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.