Which event might disrupt a stable ecosystem?

• A. Seasonal changes in temperature
• B. Daily sunlight variation
• C. Natural succession
• D. Introduction of an invasive species

Answer: (D)

Verified step by step guidance

1. Understand the concept of a stable ecosystem: A stable ecosystem is one that maintains its structure and function over time, despite external stressors. It has a balanced interaction between its biotic (living organisms) and abiotic (non-living elements) components.
2. Identify the factors listed in the problem: Seasonal changes in temperature, daily sunlight variation, natural succession, and introduction of an invasive species.
3. Evaluate each factor: Seasonal changes and daily sunlight variations are natural and predictable, allowing ecosystems to adapt over time. Natural succession is a gradual process of change in an ecosystem's species structure and is part of its natural development.
4. Consider the impact of an invasive species: An invasive species is a non-native organism that, when introduced to an ecosystem, can cause harm by outcompeting native species for resources, altering habitats, and disrupting the balance of the ecosystem.
5. Conclude that the introduction of an invasive species is the event most likely to disrupt a stable ecosystem, as it can lead to significant and often rapid changes that the ecosystem may not be able to adapt to quickly enough.