Question

What aspect of an organism makes it an invasive species?


It does harm and is introduced to the ecosystem. - correct why is this one correct

Answer 1

An organism is classified as an invasive species primarily because it is introduced to a new ecosystem where it does not naturally occur and subsequently causes harm to that ecosystem. Several key points explain why this definition is accurate:

1. **Introduction to Non-Native Environment**: Invasive species are typically introduced either intentionally (e.g., for agriculture, ornamental purposes) or accidentally (e.g., through shipping or travel). They establish populations in locations outside their native range.

2. **Harmful Effects**: The defining characteristic of an invasive species is its potential to cause significant harm to the environment, economy, or human health. This can manifest in various ways, such as:
- Displacement of native species: Invasive species can outcompete native organisms for resources such as food, space, and light, often leading to population declines or extinctions of native species.
- Alteration of habitats: Invasive species can change the physical environment or nutrient cycling within an ecosystem, which can further impact local biodiversity.
- Economic costs: Invasive species can affect agriculture, forestry, fisheries, and recreational activities, leading to economic burdens associated with management and control efforts.

3. **Lack of Natural Predators**: When introduced to a new area, invasive species often lack the natural predators or diseases that keep their populations in check in their native habitats. This can lead to rapid population growth and dominance over native species.

Overall, the combination of being introduced to a non-native ecosystem and causing harm is what makes an organism an invasive species. This underscores the importance of managing invasive species to protect native biodiversity and ecosystem health.