鲤鱼成为河中的强势鱼种,与本土鱼抢食物,破坏了水中生物原有的平衡。1澳大利亚悉尼市有一条横贯市区的帕拉玛塔河,全长大约13.7公里,直通悉尼港,是悉尼的母亲河。一直以来,帕拉玛塔河的水质并不理想,这除了河两岸的工厂较多外,还有一个原因:外来物种鲤鱼的入侵,将河水搅浑浊了。鲤鱼并不是澳大利亚的本土物种。当年,有好事者从万里之遥的欧洲,用船将鲤鱼偷运到了澳大利亚。鲤鱼 Carp become a strong fish species in the river, and local fish grab food, undermining the original balance of water creatures. 1 Sydney, Australia There is a trans-urban Parramatta River, a total length of about 13.7 kilometers through Sydney Harbor, Sydney’s mother river. The water quality of the Parramatta River has not always been ideal, except for the number of factories on both banks of the river. There is one more reason: the invasion of alien species of carp has muddied the river. Carp is not native to Australia. That year, there are good people from the miles away in Europe, the ship smuggled carp to Australia. carp