In fact, there are quite a few, this also needs to be a difference, some are native species flooding, some are alien species flooding.
Stray cats and stray dogs are typical of this category. Many of the causes of disasters are man-made. There are a lot of people who are very enthusiastic about raising dogs and cats at the beginning, pick up and shovel for a few days, and lose interest. Then they throw dogs and hairs into the wild to kill themselves, which causes many dogs and cats to wander in the wild and then reproduce. In fact, there are many people in various cities who are rescuing them, but those people are discarded much faster than they can be rescued.
To solve this problem, in fact, it is very important to standardize the process of raising dogs and cats, and to establish relevant laws, and for dogs and cats that have been stray, they should be centrally managed and not allowed to breed on a large scale. This is what makes it possible to solve this problem once and for all. It is simply not enough to rely on rescuers.
In fact, China is also seriously affected by alien species, and has also issued a list of three batches of invasive species, a total of 53 species selected for this list of invasive species.
Purple-stemmed Zephyllum, Virgoscinalis, Hollow Lotus Grass, Ragweed, Poison Wheat, Interfluille Rice Grass, Aircraft Grass, Hyacinth, False Sorghum, Cane Flat Moth, Wetland Pine Powdery Beetle, Powerful Beetle, American White Moth, African Giant Snail, Fushou Snail, Bullfrog.
Lantana, three-lobed ragweed, great fern, Canadian yellow flower, tribulus terrestris, silver gum chrysanthemum, yellow-capped chrysanthemum, wattle mustard, amaranth, sunflower potato, eucalyptus tree branch gall wasp, rice water weevil, red fire ant, proto-crayfish (crayfish), apple beetle moth, clover spotted fly, pine wood nematode, pine wood worm, pine leaf beetle, coconut leaf beetle.
Amaranth, Diamond-shaped Aster, Trilobite Ghost Needle Grass, Small Pistachia, Sumen Liquor Grass, Annual Ponacea, False Stinky Grass, Thorny Ear, Round-leaved Morning Glory, Tribulus Longthorne, Brazilian Turtle, Leopard-printEd Salmon, Red-bellied Sawfish, Nile Tilapia, Red Palm Weevil, PlaneWood Square-winged Reticulated Bug, Fuso Sponge Mealybug, Thorny Wasp.
Let's take the hyacinth as an example.
It is also called water hyacinth, which originally grew in South America and is a very famous "pest grass". It was introduced to China because it was treated as pig feed. Because the reproduction rate of water hyacinth is extremely fast, and often large-scale outbreaks, it will lead to problems such as river blockage, leading to drastic changes in water bodies, large-scale consumption of oxygen in water, which will threaten the survival of fish and cause great harm to the entire ecosystem.
Therefore, the damage to the ecosystem of invasive alien species is actually very large.