WHY are these plants so important?

Question

why are Japanese Honeysuckles, Muliflora rose, and Buckhorns so im portant or can somebody come up with a reason why there just important!

Answer 1

These plants are all nonnative species (alien or exotic are other terms for nonnative) in the United States. The problems associated with them are:
1. These plants spread easily, especially the Japanese honeysuckle.
2. They take the places of the the native species without providing the same sorts of resources to the other living things in the ecosystem.