Elaborate how invasion by an alien species reduces the diversity of an area.
This may be due to any of the following reasons: Fast-growing species may compete with less vigorous local species. Alien species will proliferate in that area if their natural pests and predators are not present. By amensalism, i.e. it may harm local species by producing chemicals. Such species may grow vigorously and may form conditions unfavorable for the growth of local native species like Eichhornia.
