Which four invasive species and describe their effect on ecosystem?

Four notable invasive species include the zebra mussel, which disrupts local ecosystems by outcompeting native species for food and altering habitats; the brown tree snake, which has led to the decline of native bird populations in Guam; the Asian carp, which threatens freshwater ecosystems by outcompeting native fish for resources; and the garlic mustard, which inhibits the growth of native plants and alters soil chemistry. Each of these species not only affects biodiversity but also disrupts food webs and ecosystem services, leading to long-term ecological changes.