Female migratory jackals

(1) Inappropriate introduction of alien species will make alien species lacking natural enemies multiply rapidly, seize the living space of other organisms, lead to ecological imbalance and the reduction and extinction of other local species, and seriously endanger local ecological security.

(2) The above examples show that invasive species have strong reproductive ability, which not only increases the absolute number of their offspring, but also increases the probability of their spread, and has advantages at the first stage of invasion. Alien species spread from the native land to the invaded land, destroying the biodiversity and ecosystem of the invaded land, destroying the original ecological balance, and even endangering human health, thus causing economic losses. Therefore, the introduction of exotic species should be cautious.

So the answer is: (1) No natural enemies;

(2) Benefits: It can solve some short-term and immediate problems in the resettlement area; Disadvantages: It may lead to imbalance of ecological balance in resettlement areas.