Island Food Web Analysis: Understanding Ecosystem Dynamics…

What is an Island Food Web?

An island food web represents the complex network of interactions among different species within a defined ecosystem. This includes producers (plants), primary consumers (herbivores), and secondary consumers (predators). The Holling type II and Rosenzweig-MacArthur models are often used to describe these interactions mathematically.

In this simulation, you can manipulate various environmental factors such as fertility, water supply, temperature, and pollution, which directly impact the population dynamics of each species in the food web.

Key Components of the Simulation

The simulation allows you to apply disturbances like wildfires, predator culls, herbivore introductions, fertiliser pulses, diseases, and more. Each disturbance can have profound effects on the ecosystem's balance.

By adjusting sliders for factors such as fertility, water supply, temperature, pollution, grazing rate, hunting pressure, and speed, you can observe how these variables influence species populations over time.

live demo · related simulation● LIVE

The Paradox of Enrichment

The paradox of enrichment refers to the phenomenon where increasing resource availability (such as nutrients) in an ecosystem initially leads to increased population growth but eventually results in a decline due to competition and other ecological factors.

In this simulation, you can test the paradox by adjusting fertility levels and observing how it affects predator-prey dynamics.

Real-World Applications

Understanding island food webs is crucial for managing ecosystems and predicting the impacts of environmental changes. For instance, knowing how to control invasive species or manage wildlife populations can help preserve biodiversity.

The insights gained from this simulation can be applied in conservation efforts, agricultural practices, and urban planning where ecological balance is critical.

Frequently asked questions

What does the paradox of enrichment mean?

It means that increasing resources in an ecosystem initially boosts population growth but eventually leads to a decline due to increased competition and other factors.

How can I use this simulation for real-world applications?

By testing different scenarios, you can understand how environmental changes affect ecosystems and apply these insights to manage wildlife populations, control invasive species, and preserve biodiversity.

What are the key disturbances in the simulation?

Key disturbances include wildfires, predator culls, herbivore introductions, fertiliser pulses, diseases, and pollution, which can be applied with adjustable radii to study their effects on the ecosystem.

How does fertility affect the food web in this simulation?

Increasing fertility generally boosts plant growth, leading to more food for herbivores. This can then lead to population increases among predators but may also result in overgrazing and subsequent declines due to the paradox of enrichment.

Try it live

Everything above runs in your browser — open Island Food Web Analysis: 2D Top-Down Lab and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.

▶ Open Island Food Web Analysis: 2D Top-Down Lab simulation