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4.3
68 reviewsInvasive species are a problem because they are outstanding
competitors. All creatures evolve toward becoming a better
competitor. Changes occur based on the requirements of their
environment.
One of the dangers of invasive aquatic and wetland plants
is that their populations increase exponentially each
year without any constraints, which alters fragile ecosystems.
Wetlands can become so clogged by the overgrowth of invasive
plant species that native birds will no longer make the wetland
their home.
Invasive plant species threaten the supply of freshwater. Aquatic
invasive species (all species, not just plants) continue to arrive in the
Great Lakes at a rate of one every eight months, adding to the more
than 160 species already causing serious ecological and economic
damage.
