The Introduction of Non-Native Species (Sec 3.5 SNC1W1)

What is a non-native species?

An organism introduced to a new ecosystem where it wasn't naturally found, usually by human means, unintentional or deliberate.

Why do introductions of non-native species usually fail?

The organism is in an ecosystem outside its tolerable range for abiotic factors.

What are the potential outcomes of a successful introduction of a non-native species?

It can be beneficial, harmful, or have no effect on its new ecosystem.

Why may a successful introduction be harmful ?

• It can compete with native species for food, resources, and space

• disrupt the equilibrium of an ecosystem

• They have a lack of predators

• damage agriculture, and spread diseases.

What defines an invasive species?

A species that is harmful to its new ecosystem.

How has globalization affected the introduction of non-native species?

Increased world traveling and the import/export of goods have made unintentional introductions more common.

Methods to control invasive species

• chemical (e.g., pesticides)

• mechanical (e.g., hunting, trapping)

• biological (introducing another species that doesn't affect natives).

Ecological Impacts of Invasive Species

• competing native species for resources

• altering nutrient cycles and energy flow

Economic Impacts of Invasive Species

Damage to forests and agriculture Causes financial loss

Impacts of Invasive Species on Tourism

Impacts on wildlife viewing, fishing, and water-based recreation

Impacts of Invasive Species on health

• Disease causing organisms

• Pesticides used to control the species