Perspective of Biological Invasion and its Consideration

Biological invasion is a major threat to biodiversity globally. It not only affects ecosystem structure and function, but also brings the economic and environmental impacts. To curb the societal, economic and environmental impacts of alien invasive species (AIS), we need realize the current status and hazard of biological invasions, and understand the invasive routes and mechanisms. Finally, we provide the theoretic connotation of biological invasions according to entropy increasing principle of Second Thermodynamics Law, and some advises on controlling biological invasions. Biological invasions, also called biological pollution, have two-dimension danger at horizontal and vertical scale, and two-channel way in natural and artificial way. The key of studying biological invasions is mechanism and principle. The mechanism of biological invasions focuses on the biological and ecological characteristic of alien invasive species, and frangibility of habitat. Its theoretic connotation embodies following aspects: entropy increasing of ecosystem will conduce to the degradation of energy; negative entropy is the source of life; biological invasion is the course of inputting positive entropy to ecosystem.