There are invasive plant species everywhere. I decided to write about the characteristics of invasive species to increase awareness of the issue. However, first I had to find a good definition. Read on to find out more.

Definition

Well like other scientific definitions, there are lots of variations of the definition. As a result, here are the basic characteristics of an invasive plant species based on definitions from USDA Invasive Plant Species and Cornell Botanics Gardens.

First, they compete directly with native species, and they are detrimental to their survival.

Second, they monopolize valuable resources such as light, space, nutrients, water, etc.

Third, invasive species are non-native. This means that they are introduced to a new location by human activity. This can be intentional or not. Plants maybe invasive in one area and not in another. Mullein is a good example of that.

What are the Characteristics of these Uninvited Plant Species?

They are masterful at reproducing either from seed or roots. These plants either spread quickly or produce large quantities of seed. The seeds usually are dispersed easily through a variety of means; birds, wind, water, etc. Similarly, if they reproduce via root systems, they are aggressive, spread long distances, and are usually dense in their growing patterns. They easily crowd out native species. Some even have chemicals in their roots or leaves that are detrimental to native plant life.

Why Should We Worry About Invasive Species?

Invasive species reproduce so fast that they monopolize an area. They crowd out native species. When this happens, it also impacts the wildlife. A variety of native plant life is necessary for native wildlife to survive.  They also like disturbed areas and invade them quickly.

Many of these species cause damage to crops, as a result, this translates into economic damage.

These plants are so prevalent that people become used to them and do not realize that they are invasive. Recently I traveled about an hour from Great Falls (where Bradford Pear trees are invasive). In that area, the red buds had not been overtaken by the nasty Bradford Pear Trees. It was so nice to see sprinklings of Red Buds along roads and in the forest.

Invasive species contribute to or cause some endangered and/or threatened species.