Why are invasive species dangerous?

Answer 1

They can affect the chemical makeup of the water, availability of resources, and even alter the food web. Invasive species impact other species more directly through competition for resources. Because invasive species evolved with other competitors and native species evolved in the absence of invasive species they lack the ability to compete with invasive species. They are costly to society in many ways through both, direct management, and decreased production. The annual estimated cost in the United States of invasive species control is about 120 billion dollars per year. It is estimated that the global cost of invasive species management is equal to five percent of the global economy.

Answer 2

Invasive plants are dangerous for the way they take over the environment. For they alter the way in which wildlife relates to each other. For example, garlic mustard [Alliaria petiolata] is aggressive. In parks and forests, it's chasing out the native toothworts [Dentaria]. And the toothworts are the preferred egg laying site for the rare West Virginia white butterfly [Pieris virginiensis]. The butterfly is being forced to lay its eggs on garlic mustard, which causes fewer eggs to hatch and harms the ones that do.

Answer 3

Because they have a large impact on the ecosystems they invade. They can affect the chemical makeup of the water, availability of resources, and even alter the food web.

Answer 4

Invasive species are dangerous because they off set the balance of the ecosystem.