Question

Name 4 invasive species and describe their effect on ecosystems

Answer 1

Answer:

Explanation:

Cogongrass

_ is an Asian plant that arrived in the United States as seeds in packing material. It is now spreading through the Southeast, displacing native plants. It provides no food value for native wildlife, and increases the threat of wildfire as it burns hotter and faster than native grasses.

Feral pigs will eat almost anything, including native birds. They compete with native wildlife for food sources such as acorns. Feral pigs spread diseases, such as brucellosis, to people and livestock. E. coli from their feces was implicated in the E. coli contamination of baby spinach in 2006.

European green crabs found their way into the San Francisco Bay area in 1989. They outcompete native species for food and habitat and eat huge quantities of native shellfish, threatening commercial fisheries.

Dutch elm disease (caused by the fungus Ophiostoma ulmi) is transmitted to trees by elm bark beetles. Since 1930, the disease has spread from Ohio through most of the country, killing over half of the elm trees in the northern United States.

Water hyacinth is a beautiful aquatic plant, introduced to the U.S. from South America as an ornamental. In the wild, it forms dense mats, reducing sunlight for submerged plants and aquatic organisms, crowding out native aquatic plants, and clogging waterways and intake pipes.

Answer 2

Explanation:

• Green Crab (Carcinus maenas) This European crab has been carried by ships in ballast water and is sold as fish bait in much of the world.
• Killer Algae (Caulerpa taxifolia)
• Sea Walnut (Mnemiopsis leidyi)
• Veined Rapa Whelk (Rapana venosa)

Invasive species cause harm to wildlife in many ways. When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls. ... Native wildlife may not have evolved defenses against the invader, or they may not be able to compete with a species that has no predators